MAX6375_R26-T中文资料
MAX4475
概述MAX4575/MAX4576/MAX4577是低电压，高静电放电（ESD）保护，双单极/单掷（SPST）模拟开关。
常关闭（NO）和常开（NC）引脚对± 15kV的ESD保护而不闭锁或损坏。
每个交换机可以处理轨到轨®模拟信号。
关断漏电流0.5nA在25 ° C。
这些适合低失真音频模拟开关应用和首选的解决方案在自动化测试设备或机械继电器开关电流所需的应用程序。
他们具有低功耗的要求（0.5μW），需要更少的电路板空间，比机械更可靠继电器。
每个设备控制的TTL / CMOS输入电压等级是双边的。
这些开关的功能保证操作+2 V至+12 V单电源供电，使他们的理想使用电池供电的应用。
电阻70Ω（最大），交换机之间的匹配，0.5Ω（典型值）单位在指定的信号范围内（2Ω典型）。
MAX4575有两个无开关，MAX4576两个NC交换机和MAX4577有一个NO和一个NC开关。
这些器件采用8引脚μMAX和SO封装。
应用电池供电系统音频和视频信号路由低电压数据采集系统采样和保持电路通信电路继电器替代品____________________________Features？NO / NC引脚的ESD保护± 15kV的（人体模型）± 15KV（IEC 1000-4-2气隙放电）± 8千伏（IEC 1000-4-2接触放电）？与MAX4541/MAX4542/MAX4543引脚兼容？保证电阻+5 V时的70Ω（最大）在+3 V，150Ω（最大）？通电阻平坦度2Ω（典型值）为+5 V在+3 V，6Ω（典型值）？电阻匹配0.5Ω（典型值）为+5 V在+3 V，0.6Ω（典型值）？保证0.5nA漏电流在TA = +25 ° C？2 V至+12 V单电源电压？TTL / CMOS逻辑兼容？低失真：0.015％？- 3dB带宽> 300MHz的？轨到轨信号范围MAX4575/MAX4576/MAX4577± 15kV ESD保护，低电压，双通道，单刀单掷，CMOS模拟开关______________________________________________________________ __马克西姆综合产品119-1762;冯0 7 / 00;对于免费样品和最新文献，参观访问www.maxim - 或电话1-800-998-8800。
MAX6045BEUR-T中文资料
General DescriptionThe MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/MAX6045/MAX6050 precision, low-dropout, micropower voltage references are available in miniature SOT23-3surface-mount packages. They feature a proprietary curvature-correction circuit and laser-trimmed thin-film resistors that result in a low temperature coefficient of <15ppm/°C and initial accuracy of better than 0.2%.These devices are specified over the extended temper-ature range.These series-mode voltage references draw only 27µA of quiescent supply current and can sink or source up to 500µA of load current. Unlike conventional shunt-mode (two-terminal) references that waste supply cur-rent and require an external resistor, devices in the MAX6012family offer a supply current that’s virtually independent of supply voltage (with only a 0.8µA/V vari-ation with supply voltage) and do not require an external resistor. Additionally, these internally compensated devices do not require an external compensation capacitor and are stable with up to 2.2nF of load capac-itance. Eliminating the external compensation capacitor saves valuable board area in space-critical applications.Their low dropout voltage and supply-independent,ultra-low supply current make these devices ideal for battery-operated, low-voltage systems.ApplicationsHand-Held Equipment Data Acquisition SystemsIndustrial and Process-Control Systems Battery-Operated Equipment Hard-Disk DrivesFeatureso 0.2% (max) Initial Accuracyo 15ppm/°C (max) Temperature Coefficient o 35µA (max) Quiescent Supply Current o 0.8µA/V Supply Current Variation with V IN o ±500µA Output Source and Sink Current o 100mV Dropout at 500µA Load Current o 0.12µV/µA Load Regulation o 8µV/V Line Regulationo Stable with C LOAD = 0 to 2.2nFMAX6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout,SOT23-3 Voltage References________________________________________________________________Maxim Integrated Products 1Typical Operating Circuit19-4777; Rev 3; 4/01Ordering InformationPin Configuration appears at end of data sheet.Selector GuideFor price, delivery, and to place orders,please contact Maxim Distribution at 1-888-629-4642,or visit Maxim’s website at .M A X 6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS—MAX6012(V IN = +5V, I OUT = 0, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.(Voltages Referenced to GND)IN.........................................................................-0.3V to +13.5V OUT .............................................................-0.3V to (V IN + 0.3V)Output Short Circuit to GND or IN (V IN < 6V)............Continuous Output Short Circuit to GND or IN (V IN ≥6V).........................60sContinuous Power Dissipation (T A = +70°C)3-Pin SOT23-3 (derate 4.0mW/°C above +70°C)........320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CELECTRICAL CHARACTERISTICS—MAX6021MAX6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References(V IN= +5V, I OUT= 0, T A= T MIN to T MAX, unless otherwise noted. Typical values are at T A= +25°C.) (Note 1)M A X 6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX6025(V IN = +5V, I OUT = 0, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)ELECTRICAL CHARACTERISTICS—MAX6030MAX6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References(V IN= +5V, I OUT= 0, T A= T MIN to T MAX, unless otherwise noted. Typical values are at T A= +25°C.) (Note 1) Array_______________________________________________________________________________________5M A X 6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX6041(V IN = +5V, I OUT = 0, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)ELECTRICAL CHARACTERISTICS—MAX6045MAX6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References(V IN= +5V, I OUT= 0, T A= T MIN to T MAX, unless otherwise noted. Typical values are at T A= +25°C.) (Note 1)M A X 6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References 8_______________________________________________________________________________________Note 1:All devices are 100% production tested at T A = +25°C and are guaranteed by design for T A = T MIN to T MAX , as specified.Note 2:Temperature Coefficient is measured by the “box” method, i.e., the maximum ∆V OUT is divided by the maximum ∆t.Note 3:Temperature Hysteresis is defined as the change in +25°C output voltage before and after cycling the device from T MIN to T MAX .Note 4:Not production tested. Guaranteed by design.Note 5:Dropout voltage is the minimum input voltage at which V OUT changes ≤0.2% from V OUT at V IN = 5.0V (V IN = 5.5V for MAX6050).ELECTRICAL CHARACTERISTICS—MAX6050(V IN = +5.5V, I OUT = 0, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)MAX6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout,SOT23-3 Voltage References_______________________________________________________________________________________9Typical Operating Characteristics(V IN = +5V for MAX6012/21/25/30/41/45, V IN = +5.5V for MAX6050; I OUT = 0; T A = +25°C; unless otherwise noted.) (Note 6)1.24701.24801.24751.24901.24851.25051.25001.24951.2510-40-2020406080100MAX6012OUTPUT VOLTAGE TEMPERATURE DRIFTTEMPERATURE DRIFT (°C)V O U T (V )4.9864.9904.9884.9964.9944.9925.0025.0004.9985.004-4020-20406080100MAX6050OUTPUT VOLTAGE TEMPERATURE DRIFTTEMPERATURE DRIFT (°C)V O U T (V ) 4.9934.9954.9944.9994.9984.9974.9965.0025.0015.0005.00303004005001002006007008009001000MAX6050LONG-TERM DRIFTTIME (h)O U T P U T V O L T A G E (V )-1002001003004002648101214MAX6012LINE REGULATIONINPUT VOLTAGE (V)O U T P U T V O L T A G E C H A N G E (µV )-0.4-0.20.20.4-500-2500250-375-125125375500MAX6012LOAD REGULATIONLOAD CURRENT (µA)O U T P U T V O L T A G E C H A N G E (m V )-2004002006008005791113MAX6050LINE REGULATIONINPUT VOLTAGE (V)O U T P U T V O L T A G E C H A N G E (µV )0.10.20.30.40.50.60.70.802004006008001000MAX6025/MAX6030DROPOUT VOLTAGE vs.SOURCE CURRENTSOURCE CURRENT (µA)D R O P O U T V O L T A GE (V )-0.400-0.2000.2000.400-500-2500250-375-125125375500MAX6050LOAD REGULATIONLOAD CURRENT (µA)O U T P U T V O L T A G E C H A N G E (m V )0.100.050.200.150.250.3004002006008001000MAX6041/MAX6045/MAX6050DROPOUT VOLTAGE vs.SOURCE CURRENTSOURCE CURRENT (µA)D R O P O U T V O L T A GE (V )M A X 6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References 10______________________________________________________________________________________1001k10k100k1M10MMAX6012POWER-SUPPLY REJECTIONvs. FREQUENCYM A X 6012-10FREQUENCY (Hz)P S R (m V /V )1000.010.1110MAX6050POWER-SUPPLY REJECTIONvs. FREQUENCYFREQUENCY (Hz)P S R (m V /V )1000.010.11101010k100k1M1001k10M20262422283032343638402648101214SUPPLY CURRENT vs. INPUT VOLTAGEINPUT VOLTAGE (V)S U P P L Y C U R R E N T (µA )0.0110010k 10.1101k100k 1MMAX6012OUTPUT IMPEDANCE vs. FREQUENCYM A X 6012-13FREQUENCY (Hz)O U T P U T I M P E D A N C E (Ω)0.11101001k 0.0110010k 10.1101k100k 1MMAX6050OUTPUT IMPEDANCE vs. FREQUENCYM A X 6012-14FREQUENCY (Hz)O U T P U T I M P E D A N C E (Ω)0.11101001k 2025303540SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )-402040-206080100V OUT 20µV/div1sec/div MAX60500.1Hz TO 10Hz OUTPUT NOISEM A X 6012-17V IN 1V/divV OUT 1V/div10µs/divMAX6012TURN-ON TRANSIENTM A X 6012-18Typical Operating Characteristics (continued)(V IN = +5V for MAX6012/21/25/30/41/45, V IN = +5.5V for MAX6050; I OUT = 0; T A = +25°C; unless otherwise noted.) (Note 6)V OUT 10µV/div1sec/div MAX60120.1Hz TO 10Hz OUTPUT NOISEM A X 6012-16MAX6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout,SOT23-3 Voltage References______________________________________________________________________________________11Typical Operating Characteristics (continued)(V IN = +5V for MAX6012/21/25/30/41/45, V IN = +5.5V for MAX6050; I OUT = 0; T A = +25°C; unless otherwise noted.) (Note 6)I OUT 40µA/div+25µA-25µAV OUT 20mV/div10µs/divMAX6012LOAD-TRANSIENT RESPONSEMAX6012-19I OUT = ±25µA, AC-COUPLEDI OUT 50µA/divV OUT 50mV/div20µs/divMAX6050LOAD-TRANSIENT RESPONSEM A X 6012-20V IN = 5.5V, I OUT = ±25µA, AC-COUPLEDV IN 2V/divV OUT 2V/div10µs/divMAX6050TURN-ON TRANSIENTM A X 6012-21+500µA-500µA V OUT 0.2V/divI OUT 1mA/div10µs/divMAX6012LOAD-TRANSIENT RESPONSEMAX6012-22I OUT = ±500µA, AC-COUPLEDV IN200mV/divV OUT 100mV/div2µs/divV IN = 5.5V ±0.25V, AC-COUPLEDMAX6050LINE-TRANSIENT RESPONSEM A X 6012-25I OUT500µA/divV OUT 200mV/div20µs/divMAX6050LOAD-TRANSIENT RESPONSEM A X 6012-23V IN = 5.5V, I OUT = ±500µA, AC-COUPLED V IN200mV/divV OUT 100mV/div2.5µs/divV IN = 5V ±0.25V, AC-COUPLEDMAX6012LINE-TRANSIENT RESPONSEM A X 6012-24Note 6:Many of the Typical Operating Characteristics of the MAX6012 family areextremely similar. The extremes of these characteristics are found in the MAX6012 (1.2V output) and the MAX6050 (5.0V output). The TypicalOperating Characteristics of the remainder of the MAX6012 family typically lie between these two extremes and can be estimated based on their output voltage.M A X 6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage References 12______________________________________________________________________________________Detailed DescriptionThe MAX6012/MAX6021/MAX6025/MAX6030/MAX6041/MAX6045/MAX6050 precision bandgap references use a proprietary curvature-correction circuit and laser-trimmed thin-film resistors, resulting in a low tempera-ture coefficient of <20ppm/°C and initial accuracy of better than 0.2%. These devices can sink and source up to 500µA with <200mV of dropout voltage, making them attractive for use in low-voltage applications.Applications InformationOutput/Load CapacitanceDevices in this family do not require an output capaci-tance for frequency stability. They are stable for capac-itive loads from 0 to 2.2nF. H owever, in applications where the load or the supply can experience step changes, an output capacitor will reduce the amount of overshoot (or undershoot) and assist the circuit’s tran-sient response. Many applications do not need an external capacitor, and this family can offer a signifi-cant advantage in these applications when board space is critical.Supply CurrentThe quiescent supply current of these series-mode ref-erences is a maximum of 35µA and is virtually indepen-dent of the supply voltage, with only a 0.8µA/V variation with supply voltage. Unlike series references, shunt-mode references operate with a series resistor con-nected to the power supply. The quiescent current of a shunt-mode reference is thus a function of the input voltage. Additionally, shunt-mode references have to be biased at the maximum expected load current, even if the load current is not present all the time. The load current is drawn from the input voltage only when required, so supply current is not wasted and efficiency is maximized at all input voltages. This improved effi-ciency can help reduce power dissipation and extend battery life.When the supply voltage is below the minimum speci-fied input voltage (as during turn-on), the devices can draw up to 200µA beyond the nominal supply current.The input voltage source must be capable of providing this current to ensure reliable turn-on.Output Voltage HysteresisOutput voltage hysteresis is the change in the output voltage at T A = +25°C before and after the device is cycled over its entire operating temperature range.H ysteresis is caused by differential package stress appearing across the bandgap core transistors. The typical temperature hysteresis value is 130ppm.Figure 1. Positive and Negative References from Single +3V or +5V SupplyMAX6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout,SOT23-3 Voltage References______________________________________________________________________________________13Pin ConfigurationChip InformationTRANSISTOR COUNT: 70Turn-On TimeThese devices typically turn on and settle to within 0.1% of their final value; 30µs to 220µs depending on the device. The turn-on time can increase up to 1.5ms with the device operating at the minimum dropout volt-age and the maximum load.Positive and Negative Low-PowerVoltage ReferenceFigure 1 shows a typical method for developing a bipo-lar reference. The circuit uses a MAX681 voltage dou-bler/inverter charge-pump converter to power an ICL7652, thus creating a positive as well as a negative reference voltage.M A X 6012/6021/6025/6030/6041/6045/6050Precision, Low-Power, Low-Dropout, SOT23-3 Voltage ReferencesPackage Information。
1N6375中文资料
1N6373 - 1N6381 Series (ICTE-5 - ICTE-36, MPTE-5 - MPTE-45) 1500 Watt Peak Power Mosorb™ Zener TransientVoltage Suppressors Unidirectional*Mosorb devices are designed to protect voltage sensitive components from high voltage, high–energy transients. They have excellent clamping capability, high surge capability, low zener impedance and fast response time. These devices are ON Semiconductor’s exclusive, cost-effective, highly reliable Surmetic™ axial leaded package and are ideally-suited for use in communication systems, numerical controls, process controls, medical equipment, business machines, power supplies and many other industrial/consumer applications, to protect CMOS, MOS and Bipolar integrated circuits.Specification Features:•Working Peak Reverse V oltage Range – 5 V to 45 V•Peak Power – 1500 Watts @ 1 ms•ESD Rating of Class 3 (>16 KV) per Human Body Model •Maximum Clamp V oltage @ Peak Pulse Current•Low Leakage < 5 m A Above 10 V•Response Time is Typically < 1 nsMechanical Characteristics:CASE:V oid-free, transfer-molded, thermosetting plasticFINISH:All external surfaces are corrosion resistant and leads are readily solderableMAXIMUM LEAD TEMPERATURE FOR SOLDERING PURPOSES: 230°C, 1/16″ from the case for 10 secondsPOLARITY:Cathode indicated by polarity bandMOUNTING POSITION:AnyMAXIMUM RATINGSfor Bidirectional DevicesAXIAL LEADCASE 41APLASTICL = Assembly LocationMPTE–xx = ON Device CodeICTE–xx = ON Device Code1N63xx = JEDEC Device CodeYY = YearWW = Work WeekDevice Package ShippingORDERING INFORMATIONMPTE–xx Axial Lead500 Units/Box MPTE–xxRL4Axial Lead1500/T ape & Reel ICTE–xx Axial Lead500 Units/Box ICTE–xxRL4Axial Lead1500/T ape & ReelNOTES:LICTE–xxYYWW1N63xx Axial Lead500 Units/Box1N63xxRL4*Axial Lead1500/T ape & ReelLMPTE–xx1N63xxYYWW1.Nonrepetitive current pulse per Figure 5 and der-ated above T A = 25°C per Figure 2.2.1/2 sine wave (or equivalent square wave), PW =8.3 ms, duty cycle = 4 pulses per minute maxi-mum.*1N6378 Not Available in 1500/Tape & ReelUni–Directional TVSELECTRICAL CHARACTERISTICS (T A = 25°C unlessotherwise noted, V= 3.5 V Max. @ I (Note 3.) = 100 A)ELECTRICAL CHARACTERISTICS (T= 25°C unless otherwise noted, V = 3.5 V Max. @ I (Note 3.) = 100 A)NOTES:3.Square waveform, PW = 8.3 ms, Non–repetitive duty cycle.4. A transient suppressor is normally selected according to the maximum working peak reverse voltage (V RWM ), which should be equal to or greater than the dc or continuous peak operating voltage level.5.V BR measured at pulse test current I T at an ambient temperature of 25°C and minimum voltage in V BR is to be controlled.6.Surge current waveform per Figure 5 and derate per Figures 1 and 2.*Not Available in the 1500/Tape & ReelFigure 1. Pulse Rating Curve 1008060402000255075100125150175200P E A K P U L S E D E R A T I N G I N % O F P E A K P O W E R O R C U R R E N T @ T A = 25C°T A , AMBIENT TEMPERATURE (°C)Figure 2. Pulse Derating CurveP D , S T E A D Y S T A T E P O W E R D I S S I P A T I O N (W A T T S )T L , LEAD TEMPERATURE (°C)t, TIME (ms)100101t P , PULSE WIDTHP P K, P E A K P O W E R (k W )Figure 3. Capacitance versus Breakdown VoltageFigure 4. Steady State Power Derating Figure 5. Pulse Waveform1N6373, ICTE-5, MPTE-5,through1N6389, ICTE-45,C, MPTE-45,CV BR , BREAKDOWN VOLTAGE (VOLTS)C , C A P A C I T A N C E (p F )1N6373, ICTE-5, MPTE-5,through1N6389, ICTE-45,C, MPTE-45,C1.5KE6.8CA through 1.5KE200CAFigure 6. Dynamic Impedance1000500200100D V BR , INSTANTANEOUS INCREASE IN V BR ABOVE V BR(NOM) (VOLTS)D V BR , INSTANTANEOUS INCREASE IN V BR ABOVE V BR(NOM) (VOLTS)I T , T E S T C U R R E N T (A M P S )Figure 7. Typical Derating Factor for Duty CycleD E R A T I N G F A C T O R10.70.50.30.050.10.010.020.030.07D, DUTY CYCLE (%)APPLICATION NOTESRESPONSE TIMEIn most applications, the transient suppressor device is placed in parallel with the equipment or component to be protected. In this situation, there is a time delay associated with the capacitance of the device and an overshoot condition associated with the inductance of the device and the inductance of the connection method. The capacitance effect is of minor importance in the parallel protection scheme because it only produces a time delay in the transition from the operating voltage to the clamp voltage as shown in Figure 8.The inductive effects in the device are due to actual turn-on time (time required for the device to go from zero current to full current) and lead inductance. This inductive effect produces an overshoot in the voltage across the equipment or component being protected as shown in Figure 9. Minimizing this overshoot is very important in the application, since the main purpose for adding a transient suppressor is to clamp voltage spikes. These devices have excellent response time, typically in the picosecond range and negligible inductance. However, external inductive effects could produce unacceptable overshoot. Proper circuit layout, minimum lead lengths and placing the suppressor device as close as possible to the equipment or components to be protected will minimize this overshoot. Some input impedance represented by Z in is essential to prevent overstress of the protection device. This impedance should be as high as possible, without restricting the circuit operation.DUTY CYCLE DERATINGThe data of Figure 1 applies for non-repetitive conditions and at a lead temperature of 25°C. If the duty cycle increases, the peak power must be reduced as indicated by the curves of Figure 7. Average power must be derated as the lead or ambient temperature rises above 25°C. The average power derating curve normally given on data sheets may be normalized and used for this purpose.At first glance the derating curves of Figure 7 appear to be in error as the 10 ms pulse has a higher derating factor than the 10 m s pulse. However, when the derating factor for a given pulse of Figure 7 is multiplied by the peak power value of Figure 1 for the same pulse, the results follow the expected trend.TYPICAL PROTECTION CIRCUITVFigure 8. Figure 9.OUTLINE DIMENSIONS1500 Watt MosorbTransient Voltage Suppressors – Axial LeadedMOSORB CASE 41A–04ISSUE DDIMA MIN MAX MIN MAX MILLIMETERS0.3350.3748.509.50INCHES B 0.1890.209 4.80 5.30D 0.0380.0420.96 1.06K 1.000---25.40---P---0.050--- 1.27NOTES:1.DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982.2.CONTROLLING DIMENSION: INCH.3.LEAD FINISH AND DIAMETER UNCONTROLLED IN DIMENSION P.4.041A-01 THRU 041A-03 OBSOLETE, NEW STANDARD 041A-04.NotesMosorb and Surmetic are trademarks of Semiconductor Components Industries, LLC.ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. PUBLICATION ORDERING INFORMATIONJAPAN: ON Semiconductor, Japan Customer Focus Center4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031Phone: 81–3–5740–2700Email: r14525@。
MAX6378XR36-T中文资料
General DescriptionThe MAX6375–MAX6380 are ultra-low-power circuits used for monitoring battery, power-supply, and regulat-ed system voltages. Each detector contains a precision bandgap reference, comparator, and internally trimmed resistors that set specified trip threshold voltages.These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from 2.5V to 5V.These circuits perform a single function: they assert an output signal whenever the V CC supply voltage falls below a preset threshold. The devices are differentiated by their output logic configurations and preset thresh-old voltages. The MAX6375/MAX6378 (push-pull) and MAX6377/MAX6380 (open-drain) have an active-low output (OUT is logic low when V CC is below V TH ). The MAX6376/MAX6379 have an active-high push-pull out-put (OUT is logic high when V CC is below V TH ). All parts are guaranteed to be in the correct output logic state for V CC down to 1V. The detector is designed to ignore fast transients on V CC . The MAX6375/MAX6376/MAX6377 have voltage thresholds between 2.20V and 3.08V in approximately 100mV increments. The MAX6378/MAX6379/MAX6380 have voltage thresholds between 3.30V and 4.63V in approximately 100mV increments.Ultra-low supply current of 500nA (MAX6375/MAX6376/MAX6377) makes these parts ideal for use in portable equipment. All six devices are available in a space-sav-ing SC70 package or in a tiny SOT23 package.ApplicationsPrecision Battery Monitoring Load Switching/Power SequencingPower-Supply Monitoring in Digital/Analog Systems Portable/Battery-Powered EquipmentFeatureso Ultra-Low 500nA Supply Current (MAX6375/MAX6376/MAX6377)o Thresholds Available from 2.20V to 4.63V in Approximately 100mV Incrementso ±2.5% Threshold Accuracy Over Temperature o Low Costo Available in Three Versions: Push-Pull OUT ,Push-Pull OUT, and Open-Drain OUT o Power-Supply Transient Immunity o No External Components o Available in Either a 3-Pin SC70 or 3-Pin SOT23 PackageMAX6375–MAX63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors________________________________________________________________Maxim Integrated Products 1Pin Configuration19-1721; Rev 2; 2/03*The MAX6375/MAX6376/MAX6377 are available in factory-pre-set thresholds from 2.20V to 3.08V, in approximately 0.1V incre-ments. The MAX6378/MAX6379/MAX6380 are available infactory-preset thresholds from 3.30V to 4.63V, in approximately 0.1V increments. Choose the desired threshold suffix fromTable 1 and insert it in the blank spaces following R.There are 21 standard versions, with a required order increment of 2500pieces. Sample stock is generally held on the standard versions only (see the Selector Guide). The required order increment is 10,000 pieces for nonstandard versions (Table 2). Contact facto-ry for availability. All devices available in tape-and-reel only.Selector Guide appears at end of data sheet.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering information continued at end of data sheetM A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = full range, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C and V CC = 3V.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Terminal Voltage (with respect to GND)V CC ...........................................................................-0.3V to +6V OUT, OUT (push-pull)................................-0.3V to (V CC + 0.3V)OUT (open-drain).....................................................-0.3V to +6V Input Current (V CC ).............................................................20mA Output Current (OUT, OUT )................................................20mAContinuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.17mW/°C above +70°C)...........174mW 3-Pin SOT23 (derate 4mW/°C above +70°C)..............320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°CNote 1:Production tested at +25°C only. Overtemperature limits are guaranteed by design, not production tested.MAX6375–MAX63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors__________________________________________Typical Operating Characteristics(V CC = 5V, T A = +25°C, unless otherwise noted.)00.30.20.10.40.50.60.70.80.91.0-40-2020406080SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )050100150200-40-2020406080PROPAGATION DELAY (FALLING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )040208060120100140-4020-20406080PROPAGATION DELAY (RISING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )50011001000MAXIMUM TRANSIENT DURATION vs. THRESHOLD OVERDRIVE100300400200THRESHOLD OVERDRIVEV TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )10Pin DescriptionM A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors____________Applications InformationInterfacing to Different Logic Voltage ComponentsThe MAX6377/MAX6380 have an active-low, open-drain output. This output structure sinks current when OUT is asserted. Connect a pullup resistor from OUT to any supply voltage up to 5.50V (Figure 1). Select a resistor value large enough to allow a valid logic low (see Electrical Characteristics ), and small enough to register a logic high while supplying all input current and leakage paths connected to the OUT line.Negative-Going V CC TransientsThese devices are relatively immune to short-duration,negative-going V CC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Threshold Overdrive graph, for which out-put pulses are not generated. The graph shows the maximum pulse width that a negative-going V CC tran-sient may typically have before the devices issue out-put signals. As the amplitude of the transient increases,the maximum-allowable pulse width decreases.Figure 1. Interfacing to Different Logic Voltage ComponentsTable 1. Factory-Trimmed Reset Thresholds ‡3-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors_______________________________________________________________________________________5Table 2. Device Marking Codes and Minimum Order IncrementsMAX6375–MAX6380M A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors 6___________________Chip InformationTRANSISTOR COUNT: 419Selector Guide**S ample stock is generally held on all standard versions.Contact factory for availability of nonstandard versions.Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________7©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.3-Pin, Ultra-Low-Power SC70/SOT23Voltage DetectorsMAX6375–MAX6380Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。
MAX6356RVUT中文资料
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at .
元器件交易网
Dual/Triple-Voltage µP Supervisory Circuits MAX6351–MAX6360
ABSOLUTE MAXIMUM RATINGS
VCC1, VCC2 to GND .................................................-0.3V to +6V RST (MAX6352/MAX6355/MAX6358)...................... -0.3V to +6V RST, MR, WDI, RST1, RSTIN (MAX6351/MAX6353/ MAX6356/MAX6359) ..............................-0.3V to (VCC1 + 0.3V) RST, RST2 (MAX6351/MAX6354/ MAX6357/MAX6360) ..............................-0.3V to (VCC2 + 0.3V) Input/Output Current, All Pins .............................................20mA Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW 6-Pin SOT23 (derate 8.7mW/°C above +70°C)............695mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature .....................................................+150°C Storage Temperature Range .............................-65°C to +150°C
MAX6425UK46-T中文资料
General DescriptionThe MAX6340/MAX6421–MAX6426 low-power micro-processor supervisor circuits monitor system voltages from 1.6V to 5V. These devices perform a single function:they assert a reset signal whenever the V CC supply volt-age falls below its reset threshold. The reset output remains asserted for the reset timeout period after V CC rises above the reset threshold. The reset timeout is exter-nally set by a capacitor to provide more flexibility.The MAX6421/MAX6424 have an active-low, push-pull reset output. The MAX6422 has an active-high,push-pull reset output and the MAX6340/MAX6423/MAX6425/MAX6426 have an active-low, open-drain reset output. The MAX6421/MAX6422/MAX6423 are offered in 4-pin SC70 or SOT143 packages. The MAX6340/MAX6424/MAX6425/MAX6426 are available in 5-pin SOT23-5 packages.ApplicationsPortable EquipmentBattery-Powered Computers/Controllers Automotive Medical Equipment Intelligent Instruments Embedded Controllers Critical µP Monitoring Set-Top Boxes ComputersFeatureso Monitor System Voltages from 1.6V to 5V o Capacitor-Adjustable Reset Timeout Period o Low Quiescent Current (1.6µA typ)o Three RESET Output OptionsPush-Pull RESET Push-Pull RESET Open-Drain RESET o Guaranteed Reset Valid to V CC = 1V o Immune to Short V CC Transientso Small 4-Pin SC70, 4-Pin SOT143, and 5-Pin SOT23Packages o MAX6340 Pin Compatible with LP3470o MAX6424/MAX6425 Pin Compatible with NCP300–NCP303, MC33464/MC33465,S807/S808/S809, and RN5VD o MAX6426 Pin Compatible with PST92XXMAX6340/MAX6421–MAX6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay________________________________________________________________Maxim Integrated Products1Ordering InformationPin Configurations19-2440; Rev 2; 10/02For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Typical Operating Circuit appears at end of data sheet.Selector Guide appears at end of data sheet.Note: The MAX6340/MAX6421–MAX6426 are available with fac-tory-trimmed reset thresholds from 1.575V to 5.0V in approxi-mately 0.1V increments. Insert the desired nominal reset threshold suffix (from Table 1) into the blanks. There are 50 stan-dard versions with a required order increment of 2500 pieces.Sample stock is generally held on standard versions only (see Standard Versions Table). Required order increment is 10,000pieces for nonstandard versions. Contact factory for availability.All devices are available in tape-and-reel only.M A X 6340/M A X 6421–M A X 6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.All Voltages Referenced to GNDV CC ........................................................................-0.3V to +6.0V SRT, RESET , RESET (push-pull).................-0.3V to (V CC + 0.3V)RESET (open drain)...............................................-0.3V to +6.0V Input Current (all pins)......................................................±20mA Output Current (RESET , RESET)......................................±20mAContinuous Power Dissipation (T A = +70°C)4-Pin SC70 (derate 3.1mW/°C above +70°C)..............245mW 4-Pin SOT143 (derate 4mW/°C above +70°C).............320mW 5-Pin SOT23 (derate 7.1mW/°C above +70°C)............571mW Operating Temperature Range .........................-40°C to +125°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°CMAX6340/MAX6421–MAX6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay_______________________________________________________________________________________300.51.01.52.02.53.03.54.00213456SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )0.1110010100010,0000.0010.10.011101001000RESET TIMEOUT PERIOD vs. C SRTM A X 6421/26 t o c 02C SRT (nF)R E S E T T I M E O U T P E R I O D(m s )4.104.204.154.254.30-50-25255075100125RESET TIMEOUT PERIOD vs. TEMPERATURETEMPERATURE (°C)R E S E T T I M E O U T P E R I O D (m s )RESET TIMEOUT PERIOD vs. TEMPERATURE200250350300500550450400600R E S E T T I M E O U T P E R I O D (µs )-5025-255075100125TEMPERATURE (°C)050251007515012517504002006008001000MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVERESET THRESHOLD OVERDRIVE (mV)T R A N S I E N T D U R A T I O N (µs )V CCTO RESET DELAYvs. TEMPERATURE (V CC FALLING)8090110100140150130120160V C C T O R E S E T D E L A Y (µs )-5025-255075100125TEMPERATURE (°C)POWER-UP/POWER-DOWNCHARACTERISTIC1V/div1V/div400µs/div0.9940.9980.9961.0021.0001.0041.006-502550-25075100125NORMALIZED RESET THRESHOLDvs. TEMPERATUREM A X 6421/26 t o c 08TEMPERATURE (°C)N O R M A L I Z E D R E S E T T H R E S H O L DTypical Operating Characteristics(V CC = 5V, C SRT = 1500pF, T A = +25°C, unless otherwise noted.)M A X 6340/M A X 6421–M A X 6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay4_______________________________________________________________________________________Detailed DescriptionReset OutputThe reset output is typically connected to the reset input of a µP. A µP ’s reset input starts or restarts the µP in a known state. The MAX6340/MAX6421–MAX6426 µP supervisory circuits provide the reset logic to prevent code-execution errors during power-up, power-down,and brownout conditions (see Typical Operating Characteristics ).RESET changes from high to low whenever V CC drops below the threshold voltage. Once V CC exceeds the threshold voltage, RESET remains low for the capacitor-adjustable reset timeout period.The MAX6422 active-high RESET output is the inverse logic of the active-low RESET output. All device outputs are guaranteed valid for V CC > 1V.The MAX6340/MAX6423/MAX6425/MAX6426 are open-drain RESET outputs. Connect an external pullup resis-tor to any supply from 0 to 5.5V. Select a resistor value large enough to register a logic low when RESET is asserted and small enough to register a logic high while supplying all input current and leakage paths connected to the RESET line. A 10k Ωto 100k Ωpullup is sufficient in most applications.Selecting a Reset CapacitorThe reset timeout period is adjustable to accommodate a variety of µP applications. Adjust the reset timeout period (t RP ) by connecting a capacitor (C SRT ) between SRT and ground. Calculate the reset timeout capacitor as follows:RESET Output Allows Use with Multiple SuppliesMAX6340/MAX6421–MAX6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay_______________________________________________________________________________________5C SRT = (t RP - 275µs) / (2.73 ✕106)where t RP is in seconds and C SRT is in farads.The reset delay time is set by a current/capacitor-con-trolled ramp compared to an internal 0.65V reference.An internal 240nA ramp current source charges the external capacitor. The charge to the capacitor is cleared when a reset condition is detected. Once the reset condition is removed, the voltage on the capacitor ramps according to the formula: dV/dt = I/C. The C SRT capacitor must ramp to 0.65V to deassert the reset.C SRT must be a low-leakage (<10nA) type capacitor;ceramic is recommended.Operating as a Voltage DetectorThe MAX6340/MAX6421–MAX6426 can be operated in a voltage detector mode by floating the SRT pin. The reset delay times for V CC rising above or falling below the threshold are not significantly different. The reset output is deasserted smoothly without false pulses.Applications InformationInterfacing to Other Voltages for LogicCompatibilityThe open-drain outputs of the MAX6340/MAX6423/MAX6425/MAX6426 can be used to interface to µPs with other logic levels. As shown in Figure 1, the open-drain output can be connected to voltages from 0 to 5.5V. This allows for easy logic compatibility to various µPs.Wired-OR ResetTo allow auxiliary circuitry to hold the system in reset,an external open-drain logic signal can be connected to the open-drain RESET of the MAX6340/MAX6423/MAX6425/MAX6426, as shown in Figure 2. This config-uration can reset the µP, but does not provide the reset timeout when the external logic signal is released.Negative-Going V CC TransientsIn addition to issuing a reset to the µP during power-up,power-down, and brownout conditions, these supervisors are relatively immune to short-duration negative-going transients (glitches). The graph Maximum Transient Duration vs. Reset Threshold Overdrive in the Typical Operating Characteristics shows this relationship.The area below the curve of the graph is the region in which these devices typically do not generate a reset pulse. This graph was generated using a negative-going pulse applied to V CC , starting above the actual reset threshold (V TH ) and ending below it by the magni-tude indicated (reset-threshold overdrive). As the mag-nitude of the transient decreases (farther below the reset threshold), the maximum allowable pulse width decreases. Typically, a V CC transient that goes 100mV below the reset threshold and lasts 50µs or less does not cause a reset pulse to be issued.Ensuring a Valid RESET or RESETDown to V CC = 0When V CC falls below 1V, RESET /RESET current-sink-ing (sourcing) capabilities decline drastically. In the case of the MAX6421/MAX6424, high-impedance CMOS-logic inputs connected to RESET can drift to undetermined voltages. This presents no problems in most applications, since most µPs and other circuitry do not operate with V CC below 1V.In those applications where RESET must be valid down to zero, adding a pulldown resistor between RESET and ground sinks any stray leakage currents, holding RESET low (Figure 3). The value of the pulldown resis-tor is not critical; 100k Ωis large enough not to load RESET and small enough to pull RESET to ground. For applications using the MAX6422, a 100k Ωpullup resis-M A X 6340/M A X 6421–M A X 6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay6_______________________________________________________________________________________tor between RESET and V CC holds RESET high when V CC falls below 1V (F igure 4). Open-drain RESET ver-sions are not recommended for applications requiring valid logic for V CC down to zero.Layout ConsiderationSRT is a precise current source. When developing the layout for the application, be careful to minimize board capacitance and leakage currents around this pin.Traces connected to SRT should be kept as short as possible. Traces carrying high-speed digital signals and traces with large voltage potentials should be rout-ed as far from SRT as possible. Leakage current and stray capacitance (e.g., a scope probe) at this pin could cause errors in the reset timeout period. When evaluating these parts, use clean prototype boards to ensure accurate reset periods.Figure 3. Ensuring RESET Valid to V CC= 0CCMAX6340/MAX6421–MAX6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay7factory for availability of nonstandard versions.Typical Operating CircuitM A X 6340/M A X 6421–M A X 6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay8_______________________________________________________________________________________Pin Configurations (continued)Chip InformationTRANSISTOR COUNT: 295PROCESS: BiCMOSMAX6340/MAX6421–MAX6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout Delay_______________________________________________________________________________________9Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)M A X 6340/M A X 6421–M A X 6426Low-Power, SC70/SOT µP Reset Circuits with Capacitor-Adjustable Reset Timeout DelayMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.10____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2002 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。
TOREX XC6371 XC6372 XC6373Series 说明书
XC6371/XC6372/XC6373 SeriesPWM Controlled Step - Up DC/DC Contorollers/Convereters■GENERAL DESCRIPTIONThe XC6371/6372/6373 series are a group of PWM controlled and PWM/PFM controlled step-up DC/DC converters. The built-in 1.4Ω switching transistor type enables a step-up circuit to be configured using only three components, a coil, a diode, and a capacitor. Output voltage can be selectable in the range from 2.0V to 7.0V in increments of 100mV (accuracy:±2.5%). Oscillation frequency is also selectable from 50kHz, 100kHz, and 180kHz (accuracy:±15%) for the XC6371 and the XC6372 series. Soft-start time is internally set and offers protection against in-rush currents when the power is switched on and prevents voltage overshoot. 5 pin packages, which are provided with either a CE (chip enable) function that reduces power consumption during shut-down mode, or a V DD pin (separated power and voltage detect pins) are available.The XC6371 series is the standard PWM controlled products. The control of the XC6372 series switches from PWM to PFM control during light loads when automatically switching is selected and the series is highly efficient from light loads to large output currents. Since the XC6373 series is a low noise, it is suitable for a wireless circuit. Also the series is particularly suited for use with pager applications because oscillation frequency is set at 30kHz (±20%) so as to attain the lowest consumption current possible.■APPLICATIONS●Cellular phones, Pagers ●Palmtops●Cameras, Video recorders ●Portable products■TYPICAL APPLICATION CIRCUIT■TYPICAL PERFORMANCECHARACTERISTICS■FEATURESOperation Start Voltage Range : 0.9V~10V Output Voltage Range : 2.0V~7.0V in 100mV increments Highly Accurate : Setting voltage accuracy ±2.5%Oscillation Frequency :50kHz, 100kHz, 180kHz (±15%) selectable (XC6371/72) 30kHz (XC6373) Maximum Output Currents (Tr. built-in):100mA(TYP.) @ V IN =3.0V, V OUT =5.0V * Highly Efficient (Tr. built-in): 85%(TYP.) @ V IN =3.0V, V OUT =5.0V * Built-in switching transistor type.Five-lead packaged units offer either chip enable or independent V OUT pin option.Phase compensation and soft start-up circuits built-in. CMOS Low Power Consumption Small Packages : SOT-89, SOT-89-5,USP-6B *: Performance depends on external components and PCB layout.☆GO-Compatible ETR0402_002PIN NUMBERSOT-89USP-6BPIN NAMEFUNCTION1 6 V SS Ground2 1 V OUT Output Voltage Monitor/IC Internal Power Supply34 Lx Switch － 2, 3,5 NC No Connection PIN NUMBERSOT-89-5USP-6BPIN NAMEFUNCTION5 6 V SS Ground 2 1 V OUT Output Voltage Monitor/IC Internal Power Supply 4 4 Lx Switch 3 3 CE Chip Enable 12, 5 NC No ConnectionPIN NUMBERSOT-89-5USP-6BPIN NAME FUNCTION5 6 V SS Ground 2 1 V DD IC Internal Power Supply 4 4 Lx Switch 3 3 V OUT Output Voltage Monitor 12, 5 NC No Connection■PIN CONFIGURATION■PIN ASSIGNMENTXC6371/72/73AXC6371/72/73CXC6371/72/73E*The dissipation pad for the USP-6B package should be solder-plated in recommended mount pattern and metal masking so as to enhance mounting strength and heat release. If the pad needs to be connected to other pins, it should be connected to the pin No.1.XC6371/XC6372/XC6373SeriesDESIGNATORDESCRIPTION SYMBOLDESCRIPTIONA : 3-pin DC/DC converter with built-in switching transistor C : Stand-by capability with built-in switching transistor①Type of DC/DC Converter E : Separated V DD and V OUT with built-in switching transistor ② ③Output VoltageInteger: e.g. V OUT =3.5V →②=3, ③=50 : 50kHz 1 : 100kHz ④ Oscillation Frequency2 : 180kHz: SOT-89 (XC6371/72 A type)P: SOT-89-5 (XC6371/72 C/D type) ⑤ PackageD : USP-6B R : Embossed tape, standard feed ⑥ Device OrientationL: Embossed tape, reverse feedDESIGNATORDESCRIPTION SYMBOLDESCRIPTIONA : 3-pin DC/DC converter with built-in switching transistor C : Stand-by capability with built-in switching transistor① Type of DC/DC Converter E : Separated V DD and V OUT with built-in switching transistor ②③ Output Voltage Integer : e.g. V OUT =3.5V →②=3, ③=5 ④ Oscillation Frequency0 : 30kHz: SOT-89 (XC6373 A type) P : SOT-89-5 (XC6373 C/D type) ⑤PackageD : USP-6BR : Embossed tape, standard feed ⑥ Device OrientationL: Embossed tape, reverse feed■PRODUCT CLASSIFICATION●Selection Guide●Ordering InformationXC6371 SeriesXC6371/73A XC6371/73C XC6371/73EXC6372A XC6372C XC6372EXC6371①②③④⑤⑥ : PWM controlledXC6372①②③④⑤⑥ : PWM/PFM switching controlXC6373①②③④⑤⑥ : PWM controlledPARAMETER SYMBOL RATINGS UNITSV OUT Input Voltage V OUT 12 V L X pin Voltage V LX 12 VL X pin Current I LX 400 mACE Input VoltageV CE 12 VSOT-89, 89-5500Power DissipationUSP-6BP d 100mW V DD Input VoltageV DD 12 VOperating Temperature RangeTopr -30~＋80 ℃Storage Temperature RangeTstg -40~＋125 ℃Ta=25℃■BLOCK DIAGRAMS (p XC6371/72/73A, C(The V OUT pin serves also as V DD )XC6371/XC6372/XC6373SeriesPARAMETER SYMBOL CONDITIONS MIN. TYP. MAX.UNITSOutput Voltage V OUT 4.875 5.000 5.125VMaximum Input Voltage V IN10--V Operation Start Voltage V ST1External Components Connected, I OUT=1mA - - 0.90 VOscillation Start Voltage V ST2No external components. Apply voltage to V OUTLx : 10kΩpull-up to 5V- - 0.80 VNo Load Input Current I IN V IN=V OUT×0.8, I OUT=0mA (*1) - 12.8 25.7 μASupply Current 1 I DD1Same as V ST2,Apply output voltage×0.95 to V OUT- 80.2133.8μASupply Current 2 I DD2Same as V ST2,Apply output voltage×1.1 to V OUT- 8.2 16.5 μALx Switch-On Resistance R SWON Same as I DD1, V LX=0.4V -1.42.4ΩLx Leak Current I LXL No external components. V OUT=V LX=10V - - 1.0μA Oscillation Frequency FOSC Same as I DD1. Measuring of Lx waveform 85 100 115 kHz Maximum Duty Ratio MAXDTY Same as I DD1. Measuring of Lx waveform 80 87 92 % PFM Duty Ratio (*4) PFMDTY Same as I DD1. Measuring of Lx waveform 10 17 25 %Lx Limit Voltage V LXLMT Same as I DD1. Apply output voltage to Lx,Voltage required to produce FOSC×20.7 - 1.3 VEfficiency EFFI - 85 - % Slow-Start Time T SS 4.010.020.0mS ■ELECTRICAL CHARACTERISTICSNOTE: Unless otherwise stated, V IN=V OUT×0.6, I OUT=50mA. See Typical Application Circuits, Circuit1*1: The Schottky diode (SD) must be type MA735, with reverse current (I R)<1.0μA at reverse voltage (V R)=10.0V.(XC6372A)*2: "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by an external V IN source is represented by"No Load Input Current (I IN)".*3: When PWM operates at PWM Mode.*4: When PFM operates at PFM Mode.(XC6372A)XC6371/72A501PR V OUT=5.0V, FOSC=100kHZ Ta=25℃PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX.UNITSOutput Voltage V OUT 4.875 5.000 5.125VMaximum Input Voltage V IN10--V Operation Start Voltage V ST1External Components Connected, I OUT=1mA - - 0.90 VOperation Start Voltage V ST2No external components. Apply voltage to V OUT,Lx : 10kΩpull-up to 5V- - 0.80 VNo Load Input Current I IN V IN=V OUT×0.8, I OUT=0mA (*1) - 12.8 25.7 μASupply Current 1 I DD1Same as V ST2,Apply output voltage×0.95 to V OUT- 80.2133.8μASupply Current 2 I DD2Same as V ST2,Apply output voltage×1.1 to V OUT- 8.2 16.5 μALx Switch-On Resistance R SWON Same as I DD1, V Lx=0.4V -1.42.4ΩLx Leak Current I LXL No external components, V OUT =V LX=10V - - 1.0μA Oscillation Frequency FOSC Same as I DD1, Measuring of Lx waveform 85 100 115 kHZMaximum Duty Ratio MAXDTY Same as I DD1, Measuring of Lx waveform 80 87 92 %PFM Duty Ratio (*4) PFMDTY Same as I DD1, Measuring of Lx waveform 10 17 25 %Stand-by Current I STB Same as I DD1 --0.5μACE "High" Voltage V CEH Same as I DD1, Lx Oscillation start 0.75 - - VCE "Low" Voltage V CEL Same as I DD1, Lx Oscillation stop - - 0.20 VCE "High" Current I CEH Same as I DD1, V CE=V OUT×0.95 - - 0.25μACE "Low" Current I CEL Same as I DD1, V CE=0V ---0.25μALx Limit Voltage V LxLMT Same as I DD1, Apply output voltage to Lx,Voltage required to produce FOSC×20.7 - 1.3 VEfficiency EFFI - 85 - % Slow-Start Time T SS 4.010.020.0ms XC6371/72C501PR V OUT=5.0V, FOSC=100kHz Ta=25℃NOTE: Unless otherwise stated, connect CE to V OUT, V IN=V OUT×0.6, I OUT=50mA. See Typical Application Circuits, Circuit 2.*1: The Schottky diode (SD) must be type MA735, with reverse current (I R)<1.0μA at reverse voltage (V R)=10.0V.(XC6372C)*2: "Supply Current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by an external VIN source is represented by"No Load Input Current (I IN)".*3: When PWM operates at PWM Mode.*4: When PFM operates at PFM Mode.(XC6372C)■ELECTRICAL CHARACTERISTICS (Continued)XC6371/XC6372/XC6373SeriesPARAMETER SYMBOL CONDITIONS MIN. TYP. MAX.UNITSOutput Voltage V OUT 4.875 5.000 5.125VMaximum Input Voltage V IN10--V Operation Start Voltage V ST1External Components Connected, I OUT=1mA - - 0.90 VOscillation Start Voltage V ST2No external components,Apply voltage to V OUT, Lx:10kΩpull-up to 5V- - 0.80 VNo Load Input Voltage I IN V IN=V OUT×0.8, I OUT=0mA(*1) - 12.8 25.7 μASupply Current 1 I DD1Same as V ST2,Apply output voltage×0.95 to V OUT- 80.2133.8μASupply Current 2 I DD2Same as V ST2,Apply output voltage×1.1 to V OUT- 8.2 16.5 μALx Switch-On Resistance R SWON Same as I DD1, V LX=0.4V -1.42.4ΩLx Leak Current I LXL No external components, V OUT =V LX=10V - - 1.0 μA Oscillation Frequency FOSC Same as I DD1, Measuring of Lx waveform 85 100 115 kHZ Maximum Duty Ratio MAXDTY Same as I DD1, Measuring of Lx waveform 80 87 92 % PFM Duty Ratio (*4) PFMDTY Same as I DD1, Measuring of Lx waveform 10 17 25 %Lx Limit Voltage V LxLMT Same as I DD1, Apply output voltage to Lx,Voltage required to produce FOSC×20.7 - 1.3 VEfficiency EFFI - 85 - % Slow-Start Time T SS 4.010.020.0ms XC6371/72E501PR V OUT=5.0V, FOSC=100kHz Ta=25℃NOTE: Unless otherwise stated, connect V DD to V OUT, V IN=V OUT×0.6, I OUT=50mA. See Typical Application Circuits, Circuit 3.*1: The Schottky diode (SD) must be type MA2Q735, with reverse current (I R)<1.0μA at reverse voltage (V R)=10.0V.(XC6372E)*2: "Supply current 1" is the supply current while the oscillator is continuously oscillating. In actual operation the oscillator periodically operates which results in less average power consumption. The current actually provided by external V IN source is represented by "NoLoad Input Current (I IN)".*3: When PWM operates at PWM Mode.*4: When PFM operates at PFM Mode.(XC6372E)*5: When the V DD and V OUT pins are independently used, the voltage range at the V DD pin should be 2.2V to 10V. The IC operates from V DD=0.8V. However, output voltage and oscillation frequency are properly stabilized when V DD=2.2V or higher.■ELECTRICAL CHARACTERISTICS (Continued)PARAMETERSYMBOL CONDITIONS MIN. TYP . MAX.UNITS Output Voltage V OUT 2.925 3.000 3.075V Maximum Input Voltage V IN 10 - - VOperation Start Voltage V ST1 External Components Connected,I OUT =1mA- - 0.90VOscillation Start VoltageV ST2 No external components,Apply voltage to V OUT , LX :10k Ωpull-up to 5V- - 0.80VSupply Current 1 I DD1 Same as V ST2.Apply output voltage ×0.95 to V OUT- 13.1 21.9μASupply Current 2 I DD2 Same as V ST2,Apply output voltage ×1.1 to V OUT- 3.9 7.9 μALx Switch-On ResistanceR SWON Same as I DD1, V LX =0.4V - 3.4 5.7 ΩLx Leak Current I LXL No external components,V OUT =V LX =10V- - 1.0 μAOscillation Frequency FOSC Same as I DD1, Measuring of Lx waveform 24 30 36 kHZ Maximum Duty RatioMAXDTY Same as I DD1, Measuring of Lx waveform 80 87 92 % Efficiency EFFI - 77 - % Slow-Start TimeT SS 4.0 10.0 20.0mSPARAMETER SYMBOL CONDITIONS MIN. TYP . MAX.UNITS Output Voltage V OUT 3.128 3.300 3.383V Maximum Input Voltage V IN 10 - - V Operation Start Voltage V ST1 External Components Connected, I OUT =1mA - - 0.90VOscillation Start VoltageV ST2 No external components,Apply voltage to V OUT , LX :10k Ωpull-up to 5V- - 0.80VSupply Current 1 I DD1 Same as V ST2,Apply output voltage ×0.95 to V OUT- 14.1 23.5μASupply Current 2 I DD2 Same as V ST2,Apply output voltage ×1.1 to V OUT - 4.0 8.1 μALx Switch-On Resistance R SWON Same as I DD1. V LX =0.4V - 3.4 5.7 ΩLx Leak Current I LXLNo external components,V OUT =V LX =10V - - 1.0 μAOscillation Frequency FOSC Same as I DD1,Measuring of Lx waveform24 30 36 kHZMaximum Duty Ratio MAXDTY Same as I DD1,Measuring of Lx waveform80 87 92 %Efficiency EFFI - 77 - % Slow-Start TimeT SS 4.0 10.0 20.0mS■ELECTRICAL CHARACTERISTICS (Continued) XC6373A300PR V OUT =3.0V, FOSC=30kHzTa=25℃NOTE: Unless otherwise stated, V IN =V OUT ×0.6, I OUT =15mA. See Typical Application Circuits, Circuit 1. XC6373A330PRV OUT =3.3V, FOSC=30kHzTa=25℃NOTE: Unless otherwise stated, V IN =VOUT ×0.6, IOUT=16.5mA. See Typical Application Circuits, Circuit 1.XC6371/XC6372/XC6373Series■TYPICAL APPRICATION CIRCUITSCircuit 1: XC6372A seriesCircuit 3: XC6372E seriesCircuit 2: XC6372C seriesL : 100μH (CR54, SUMIDA)L : 100H (CR54, SUMIDA) L : 100μH (CR54, SUMIDA)L : 100μH (CR54, SUMIDA)SD : MA2Q735 (Schottky Diode; MATUSHITA)C L : 16V47μF (Tantalum Capacitor, NICHICHEMI MCE)SD : MA2Q735 (Schottky Diode; MATUSHITA)C L : 16V 47μF (Tantalum Capacitor, NICHICHEMI MCE)SD : MA2Q735 (Schottky Diode; MATUSHITA)C L : 16V 47μF (Tantalum Capacitor; NICHICHEMI MCE)■TYPICAL PERFORMANCE CHARACTERISTICS(1) Output Voltage vs. Output Current 0.11101001000L ＝100μH （CR54），C L ＝47μF（Tantalum ）Output Current:I OUT （mA ）XC6371A301P R3.103.053.002.952.90O u t p u t V o l t a g e :V O U T （V ）4.84.95.05.15.20.11101001000XC6372A501PRO u t p u t V o l t a g e :V O U T （V ）Output Current:I OUT (mA)2.902.953.003.053.100.11101001000XC6372A301PRO u t p u t V o l t a g e :V O U T （V ）Output Current:I OUT (mA)2.902.953.003.053.10XC6373A300PROutput Current: I OUT (mA)O u t p u t V o l t a g e : V O U T (V )0.11101001000L ＝100μH (CR54),C L ＝47μF (Tantalum )Output Current:I OUT （mA ）XC6371A501PR5.25.15.04.94.8O u t p u t V o l t a g e :V O U T （V ）1000(2) Efficiency vs. Output Current ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)204060801000.11101001000XC6373A300PROutput Current: I OUT (mA)E f f i c i e n c y : EF F I (%)0.11101001000L ＝100μH (CR54),C L ＝47μF (Tantalum )Output Current:I OUT （mA ）XC6371A301PR100806040200E f f i c i e n c y :EF F I (%)0.11101001000L Output Current:I OUT （mA ）XC6371A501PR100806040200E f f i c i e n c y :EF F I (%)1000 1000 1000(3) Ripple Voltage vs. Output Current■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)204060801000.11101001000XC6373A300PROutput Current:I OUT (mA)R i p p l e V o l t a g e : V r (m V p -p )0204060800.11101001000XC6371A301PRR i p p l e V o l t a g e :V r （m V p -p ）Output Current:I OUT (mA)1000 1000 10(4) No Load Input Current vs. Input Voltage ■TYPICAL PERFORMANCE CHARACTERISTICS (Continued) 01002003004005001XC6371A301PRI n p u t C u r r e n t :I I N (μA )Input Voltage:V IN (V)23050100150200012345XC6372A501PRInput Voltage:V IN (V)I n p u t C u r r e n t :I I N (μA )(5) Operation Start Voltage / Hold Voltage vs. Output Current (6) Load Transient Response■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)■PACKAGING INFORMATION ●SOT-89●SOT-89-5●USP-6BOSCILLATION FREQUENCYOUTPUT VOLTAGE (V)50kHz 100kHz 180kHz1.x B 1 12.x C 2 23.x F 3 34.x E 4 45.x F 5 56.x H 6 67.x K 7 7OSCILLATION FREQUENCYOUTPUT VOLTAGE (V)50kHz 100kHz 180kHzx.0 0 0 A x.1 1 1 B x.2 2 2 C x.3 3 3 D x.4 4 4 E x.5 5 5 F x.6 6 6 H x.7 7 7 K x.8 8 8 L x.9 9 9 M■MARKING RULE[XC6371/72] ① Represents product series② Represents integer of output voltage and oscillation frequency ③ Represents decimal number of output voltage and oscillation frequency ●SOT-89, SOT-89-5SOT-89 (TOP VIEW)④③②①123SOT-89-5(TOP VIEW)■PACKAGING INFORMATION (Continued)●USP-6B Recommended Pattern Layout●USP-6B Recommended Metal Mask DesignMARK PRODUCT SERIES5 XC6371xxxxDx2 XC6372xxxxDxMARK PRODUCT SERIESA XC6371A C XC6371CE XC6371EMARK③④OUTPUT VOLTAGE (V)3 3 3.3 5 05.0MARK OSCILLATION FREQUENCY (kHz)0 501 1002 180■MARKING RULE (Continued)●USP-6B① Represents product series② Represents product classification③④ Represents output voltage (ex.)⑤ Represents oscillation frequency⑥ Represents production lot number0 to 9, A to Z repeated (G, I, J, O, Q, W excepted) Note: No character inversion used.USP-6B (TOP VIEW)[XC6371/72] (Continued)MARK FUNCTION PRODUCT SERIESA - Built-in Transistor XC6372AxxxPx A CE Built-in Transistor XC6372CxxxPx S Separated V DD and V OUT Built-in Transistor XC6372ExxxPxOSCILLATION FREQUENCY (PRODUCT SERIES)OUTPUT VOLTAGE (V)30kHz (XC6373xxx0Px)1.x B2.x C3.x F4.x E5.x F6.x H7.x KOSCILLATION FREQUENCY (PRODUCT SERIES)OUTPUT VOLTAGE (V)30kHz (XC6373xxx0Px)x.0 0 x.1 1 x.2 2 x.3 3x.4 4 x.5 5 x.6 6 x.7 7 x.8 8 x.9 9① Represents product series② Represents integer of output voltage and oscillation frequency ③ Represents decimal number of output voltage and oscillation frequency ④ Represents production lot number0 to 9, A to Z repeated (G, I, J, O, Q, W excepted).■MARKING RULE (Continued)●SOT-89,SOT-89-5④③②①123SOT-89(TOP VIEW)SOT-89-5 (TOP VIEW)〔XC6373〕。
MAX6675中文数据手册
热电偶开路检测
位 D2 一般情况下为 0，在热电偶开路时 跳变为 1。为了使热电偶开路检测器能够 正常运行，T-必须接地，且接地点需尽可 能靠近 GND 引脚。
温升的考虑
在某些应用中器件自身发热会降低 MAX6675 的精度。温度误差的大小取决于 MAX6675 封装的热传导性、安装技术、和 气流的影响。使用一个大的地平面可以提 高 MAX6675 的温度测量精度。
100
ns
100 ns
100 ns
100 ns
Note 1: 所有参数都是在 TA=25℃下 100%测试。温度超过极限 (TA = TMIN to TMAX) 的参 数只从设计和特性上保证，没有产品测试。 Note 2: 从设计上保证，没有产品测试。
（没有特别指出，VCC=+3.3V，TA=+25℃） 输出码误差和环境温度
使用适当的保护套保护热电偶
仅仅在低温、温度波动小的区域使用 补偿导线
保存事件日志和热电偶阻抗的记录
噪声方面的考虑
MAX6675 的精确度易受电源耦合噪声的影 响。电源噪声的影响可以通过放置 1 个 0.1μ F 的陶瓷电容消弱，电容应靠近器 件的电源引脚。
减小拾取噪声的影响
输入放大器（A1）是一个低噪声的放大器， 它被设计为能够放大高精度的传感器输入 信号。确保热电偶和与其想接的导线远离 电子噪声源。
可以用以下措施改善热电偶系统的测量精 度：
使用尽可能粗的导线，这样的导线不 至于从测量区域分流来大量的热
如果要求使用比较细的导线在，则仅 仅在测量区使用这种线，在没有温升 的地方使用补偿导线
MAX9635中文资料
16-BIT ADC
Байду номын сангаас
6-BIT RANGE DIGITAL
CDR, TIM
SIGNAL
CONTROL PROCESSING
16-BIT ADC
方框图
VCC
SDA SCL I2C AO INT
N
GND
________________________________________________________________ Maxim Integrated Products 1 本文是英文数据资料的译文，文中可能存在翻译上的不准确或错误。如需进一步确认，请在您的设计中参考英文资料。
平板PC/笔记本电脑 TV/投影仪/显示器
数字照明管理 便携设备
蜂窝电话/智能电话
安全系统
应用
业内功耗最低的 环境光传感器，内置ADC
特性
♦♦0.045流明至188,000流明宽检测范围 ♦♦小尺寸、2mm x 2mm x 0.6mm UTDFN-Opto封装 ♦♦VCC = 1.7V至3.6V ♦♦工作电流ICC = 0.65µA ♦♦-40°C至+85°C工作温度范围
由于能够检测极其微弱的光线，非常适合光线较暗的工作 环境。
片上光电二极管的光谱响应针对人眼对环境光的响应进行优 化，集成红外及紫外线屏蔽功能。自适应增益电路可自动选
择正确的流明范围优化测试(计数值 / 流明)。
IC设计工作在1.7V至3.6V供电范围，满负荷工作时仅 消 耗0.65µA电流。器件采用小尺寸2mm x 2mm x 0.6mm UTDFN-Opto封装。
有关价格、供货及订购信息，请联络Maxim亚洲销售中心：10800 852 1249 (北中国区)，10800 152 1249 (南中国区)， 或访问Maxim的中文网站：。
MAXIM MAX6695 MAX6696 数据手册
________________________________概述MAX6695/MAX6696是两款精密的双远端及本地数字温度传感器。
这两款器件都能精确地测量其管芯的温度以及两个外部连接为二极管形式的晶体管的温度，并通过2线串行接口以数字形式报告温度测量值。
远端二极管通常为CPU 、FPGA 、GPU 或ASIC 上的共集电极PNP 管的发射结。
2线串行接口可接受标准的系统管理总线(SMBus TM )命令，例如写字节、读字节、发字节及收字节等，并能通过这些命令来读取温度数据以及对告警门限与转换速率进行编程。
MAX6695/MAX6696具有可编程的转换速率，并且能够以设定好的速率自主运行，便于设计者对电源电流及温度刷新速率进行控制，以符合系统要求。
对于2Hz 或更低的温度转换速率，以带符号位的10位二进制数来表示温度，分辨率为+0.125°C 。
当转换速率为4Hz 时，输出数据为带符号位的7位二进制数，分辨率为+1°C 。
MAX6695/MAX6696还具有可提高系统可靠性的SMBus 超时特性。
在+60°C 至+100°C 范围内，无需校准，远端温度测量精度即可达到±1.5°C 。
MAX6695/MAX6696可测量的温度范围为-40°C 至+125°C 。
除具有SMBus ALERT 输出外，MAX6695/MAX6696还具有两个温度过限指示(OT1和OT2)，仅当温度高于对应的可编程温度门限时有效。
OT1和OT2输出通常用于风扇控制、降低时钟频率或系统关机。
MAX6695拥有一个固定的SMBus 地址，而MAX6696则具有九个引脚可选的SMBus 地址。
MAX6695采用10引脚µMAX ®封装，而MAX6696则采用16引脚QSOP 封装。
这两款器件均可在-40°C 至+125°C 温度范围内工作。
MAX6756中文资料
General DescriptionThe MAX6754–MAX6764 low-power window detectors monitor undervoltage/overvoltage conditions on system power supplies. These devices assert when the moni-tored voltage is under the undervoltage and/or over the overvoltage thresholds.The MAX6754–MAX6759/MAX6763/MAX6764 monitor a single voltage. The MAX6760/MAX6761/MAX6762 monitor dual-voltage systems. The MAX6754/MAX6755/MAX6756 provide a single undervoltage/overvoltage output and the MAX6757–MAX6764 provide indepen-dent undervoltage and overvoltage outputs. The out-puts are available in push-pull or open-drain configurations.The MAX6754–MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V with a selectable ±5%, ±10%, or ±15% window volt-age. The MAX6763/MAX6764 allow for externally adjustable thresholds. The MAX6754–MAX6762 are available in two delay timing options (20µs, typ or 100ms, min). The MAX6760/MAX6761/MAX6762 also include a latched overvoltage output function and the MAX6754–MAX6762 include a manual reset input.The family of products is available in small SOT23 and TDFN packages and is specified over the extended temperature range of -40°C to +125°C.ApplicationsFeatures♦Single- or Dual-Supply Voltage Monitors ♦Factory-Trimmed Window Threshold Options for 5V, 3.3V, 3V, 2.5V, 1.8V, 1.5V, 1.2V, and 0.9V Supplies ♦Externally Adjustable Window Monitoring Options for Supplies Down to 0.5V ♦Selectable Window Threshold Options (±5%,±10%, ±15%)♦Single (Combined UV/OV) or Dual (Separate UV and OV) Outputs ♦20µs (typ) or 100ms (min) Timeout Period Options (MAX6754–MAX6762)♦Manual Reset Input (MAX6754–MAX6762)♦Latched Overvoltage Output Function (MAX6760/MAX6761/MAX6762)♦Immune to Short Voltage Transients ♦Low 10µA Supply Current♦Low-Voltage Operation (Outputs Valid for V CC Down to 1V)♦-40°C to +125°C Operating Temperature Range ♦Small SOT23 and TDFN PackagesMAX6754–MAX6764Low-Power, Single/Dual-Voltage WindowDetectors________________________________________________________________Maxim Integrated Products 1Ordering InformationTypical Application Circuit19-3075; Rev 1; 12/03For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .*Note:Insert the threshold level suffixes for V CC and V CC2(Tables 1 and 2) after UK, UT, or TA. For theMAX6754–MAX6759, insert only the V CC threshold suffix after the UK or UT. Insert the reset timeout delay (Table 3) after D to complete the part number. For example, the MAX6760TALTD3-T provides a V CC threshold of 5V, a V CC2threshold of 3.3V, and a 100ms minimum reset timeout period. Sample stock is generally held on standard versions only (see the Standard Versions table ). Standard versions have an order increment requirement of 2500 pieces. Nonstandard versions have an order increment requirement of 10,000 pieces. Contact factory for availability.Ordering Information continued at end of data sheet.Pin Configurations appear at end of data sheet.Telecommunications Networking Computers/Servers Data StoragePower Metering DC-DC Converter Modules AutomotiveM A X 6754–M A X 6764Low-Power, Single/Dual-Voltage Window Detectors 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =+25°C.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.(Voltages with respect to GND)V CC , V CC2, ............................................................-0.3V to +6.5V SET, OVLATCH, MR , UVIN, OVIN..............-0.3V to (V CC + 0.3V)UV , RESET , OV (open drain).................................-0.3V to +6.5V RESET, OV , UV, UV , RESET (push-pull).....-0.3V to (V CC + 0.3V)Input/Output Current (all pins)............................................20mAContinuous Power Dissipation (T A = +70°C)5-Pin SOT23-5 (derate 7.1mW/°C above T A = +70°C)....571mW 6-Pin SOT23-6 (derate 8.7mW/°C above T A = +70°C)....696mW 8-Pin TDFN (derate 24.4mW/°C above T A = +70°C).....1951mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX6754–MAX6764Low-Power, Single/Dual-Voltage WindowDetectorsELECTRICAL CHARACTERISTICS (continued)(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =M A X 6754–M A X 6764Low-Power, Single/Dual-Voltage Window Detectors 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS (continued)(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =+25°C.) (Note 1)MAX6754–MAX6764Low-Power, Single/Dual-Voltage WindowDetectors_______________________________________________________________________________________5ELECTRICAL CHARACTERISTICS (continued)(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =M A X 6754–M A X 6764Low-Power, Single/Dual-Voltage Window Detectors 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS (continued)(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =MAX6754–MAX6764Low-Power, Single/Dual-Voltage WindowDetectors_______________________________________________________________________________________7ELECTRICAL CHARACTERISTICS (continued)(V CC = 1.0V to 6.0V, V CC2= 0 to 6.0V (MAX6760–MAX6762), T A = -40°C to +125°C, unless otherwise noted. Typical values are at T A =Note 1:Devices are production tested at +25°C. Overtemperature limits are guaranteed by design.Note 2:Voltage monitoring requires that V CC must be greater than or equal to 1.4V, but outputs remain asserted in the correct state for V CC down to 1.0V.Note 3:Guaranteed by design.Note 4:For D0 window detector options and OV outputs, startup delay time is the time required for the internal reference/circuitry to reach specified accuracy after the monitor is powered up from GND.Note 5:The input bias voltage is based off of V CC . The minimum value is given by the equation (0.1 x V CC + 0.51)V and the maxi-mum value is given by (0.9 x V CC - 0.51)V.M A X 6754–M A X 6764Low-Power, Single/Dual-Voltage Window Detectors 8_______________________________________________________________________________________Typical Operating Characteristics(V CC = 5V, V CC2 = 3.3V, T A = +25°C, unless otherwise noted.)OVERVOLTAGE THRESHOLDvs. TEMPERATURETEMPERATURE (°C)N O R M A L I Z E D O V E R V O L T A G E T H R E S H O L D (V )1109580655035205-10-250.980.991.001.011.021.030.97-40125UNDERVOLTAGE THRESHOLDvs. TEMPERATURETEMPERATURE (°C)N O R M A L I Z E D U N D E R V O L T A G E T H R E S H O L D (V )1109580655035205-10-250.980.991.001.011.021.030.97-40125TRANSIENT IMMUNITY vs. THRESHOLD OVERDRIVEOVERDRIVE (mV)T R A N S I E N T I M M U N I T Y (µs )1001010010001100010D3 TIMEOUT PERIOD vs. TEMPERATUREM A X 6754 t o c 04T I M E O U T P E R I O D (m s )182184186188190192194180TEMPERATURE (°C)1109580655035205-10-25-40125SUPPLY CURRENT vs. SUPPLY VOLTAGEV CC (V)I C C (µA )54328101214161820616OUTPUT VOLTAGE LOW vs. SINK CURRENTI SINK (mA)V O L (V )151050.20.40.60.81.01.21.41.61.80020OUTPUT VOLTAGE HIGH vs. SOURCE CURRENTI SOURCE (mA)V O H - V C C (V )15105-1.6-1.4-1.2-1.0-0.8-0.6-0.4-0.20-1.820MAX6754–MAX6764Low-Power, Single/Dual-Voltage WindowDetectors_______________________________________________________________________________________9M A X 6754–M A X 6764Low-Power, Single/Dual-Voltage Window Detectors 10______________________________________________________________________________________Pin Description (continued)Functional DiagramsFigure 1. MAX6754/MAX6755/MAX6756 Functional DiagramFunctional Diagrams (continued)MAX6754–MAX6764DetectorsFigure 2. MAX6757/MAX6758/MAX6759 Functional DiagramM A X 6754–M A X 6764DetectorsFigure 3. MAX6760/MAX6761/MAX6762 Functional DiagramFunctional Diagrams (continued)MAX6754–MAX6764DetectorsDetailed DescriptionThe MAX6754–MAX6764 are low-power window volt-age detectors capable of monitoring undervoltage and overvoltage conditions on system power supplies.Whenever a monitored voltage falls below its undervolt-age threshold or exceeds its overvoltage threshold,these devices assert their outputs to notify the system (see Functional Diagrams ).The MAX6754/MAX6755/MAX6756 are single-voltage window detectors with internally fixed nominal voltage,externally adjustable set window, single reset under/overvoltage output, and a manual reset input.The MAX6757/MAX6758/MAX6759 are single-voltage window detectors with internally set nominal voltage,externally adjustable set window, separate under/over-voltage outputs, and manual reset input.The MAX6760/MAX6761/MAX6762 are dual-voltage window detectors with internally/externally set nominal voltages, externally adjustable set window, separate under/overvoltage outputs, manual reset input, and overvoltage latch functions.The MAX6763/MAX6764 are single adjustable window detectors with separate under/overvoltage outputs.The MAX6754–MAX6762 offer factory-fixed voltage thresholds for monitoring system voltages from 0.9V to 5V. The MAX6754–MAX6762 include a SET function to select the window voltage to ±5%, ±10%, or ±15%. The MAX6763/MAX6764 allow for externally adjustable upper and lower voltage thresholds to be set externally (down to 0.5V). The MAX6754–MAX6762 are available with two timing options (20µs propagation delay or 100ms minimum reset timeout).Supply VoltagesV CC is the power-supply input and the monitored voltage of the MAX6754–MAX6762. These devices feature a fac-tory-trimmed V CC and V CC2divider that sets the nominal input range (see Tables 1 and 2). V CC for the MAX6763/MAX6764 is the power supply of the device and not the monitored voltage. For noisy systems, bypass V CC and V CC2each with a 0.1µF capacitor to GND.Setting the Adjustable Nominal VoltageThresholdThe MAX6760/MAX6761/MAX6762 (versions with suffix-es LA, TA, RA, ZA, WA, and AA) offer adjustable nominal voltage threshold to monitor V CC2. Use an external volt-age-divider to set the voltage at V CC2to 0.4255V.Configure SET to select a monitor window of ±5%,±10%, or ±15% (see Figure 5). The MAX6760/MAX6761/MAX6762 suffix AA monitor only V CC2and do not moni-tor V CC .M A X 6754–M A X 6764Detectors Choose R2 to have a resistance of up to 500k Ω.Calculate R1 by:R1 = ((V +- 0.4255V) x R2) / 0.4255VThe MAX6763/MAX6764 provide inputs to a window detector allowing the programming of the threshold voltage to within V CC (see Figure 6).Choose R1, R2, and R3 such that:(V+/ (R1 + R2 + R3)) ≥1µASETThe MAX6754–MAX6762 allow the setting of the window voltage range of the voltage detector. Connect SET to GND to set a ±5% window. Connect SET to V CC for a ±10% window. Bias SET to V CC /2 for a ±15% window.Manual Reset (MR )The MAX6754–MAX6762 include an active-low manual reset input. Drive MR low to assert a reset output (MAX6754/MAX6755/MAX6756) or an undervoltage output (MAX6757/MAX6758/MAX6759). The output remains asserted for the specified propagation delay time (see Figure 7) after MR goes high. MR is internally pulled to V CC with a 26k Ωresistor.Overvoltage Latch Control Input(OVLATCH)The MAX6760/MAX6761/MAX6762 provide an overvolt-age latch control input (OVLATCH ). Drive OVLATCH high to latch the overvoltage output for any V CC or V CC2overvoltage condition. Drive OVLATCH low to clear the latch after overvoltage conditions have been removed. The latch is transparent when OVLATCH is connected to GND. OVLATCH is a high impedance input. Use external pullup or pulldown.Reset, Undervoltage, and Overvoltage Outputs (RESET, RESET , UV , UV, OV)RESET, RESET , UV , UV, and OV outputs assert when the monitored supply is below the selected UV TH threshold or above the selected OV TH threshold. The reset output deasserts after the specified timeout peri-od when the monitored supply rises above the UV TH threshold or drops below the OV TH threshold. The push-pull versions are referenced to V CC .The MAX6760/MAX6761/MAX6762 monitor both V CC and V CC2. An under/overvoltage condition on either voltage supply asserts the corresponding output.RESET and UV are guaranteed to be in the correct logic state when V CC or V CC2> 1V.MAX6754–MAX6764DetectorsApplications InformationMicroprocessor MonitoringFigure 8 shows a microprocessor monitoring circuit. An overvoltage condition on either the core or I/O supplyturns the SCR on, blowing the fuse to disconnect the circuit from the power source. An optional capacitor (C1) on the gate of the SCR provides additional tran-sient immunity against nuisance trips.Figure 8. Microprocessor MonitoringSelector GuideM A X 6754–M A X 6764DetectorsMAX6754–MAX6764DetectorsM A X 6754–M A X 6764DetectorsMAX6754–MAX6764DetectorsChip InformationTRANSISTOR COUNT: 726PROCESS: BiCMOSPin ConfigurationsM A X 6754–M A X 6764DetectorsPackage Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)MAX6754–MAX6764Low-Power, Single/Dual-Voltage Window Detectors______________________________________________________________________________________21Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)M A X 6754–M A X 6764Low-Power, Single/Dual-Voltage Window DetectorsMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.22____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)This datasheet has been download from: Datasheets for electronics components.。
6372中文资料
All dimensions are in inches. Tolerances (except noted): .xx = ±.02” (,51 mm), .xxx = ± .005” (,127 mm). All specifications are to the latest revisions. Specifications are subject to change without notice. Registered trademarks are the property of their respective companies. Made in USA“Do-It-Yourself”FEATURES:• Molded in contacts assure precision alignment • Matching thermocouple alloys reduce EMF• Channel design isolates wires for clear, strong signals • Make your own extension cablesMATERIALS:Insulator – Hytrel 4776.MODEL NUMBER CALIBRATION COLOR6372 K Yellow 6559 J Black 6560 E Violet 6561 T BlueRATINGS:Maximum Ambient Temperature - 400°F. (205°C.).Maximum Wire Size – 20AWG (solid), 22 AWG (stranded)ORDERING INFORMATION: Model 6372, 6559, 6560, 6561 Note: For low voltage environments do not exceed 30VAC/60VDC.All dimensions are in inches. Tolerances (except noted): .xx = ±.02” (,51 mm), .xxx = ± .005” (,127 mm). All specifications are to the latest revisions. Specifications are subject to change without notice. Registered trademarks are the property of their respective companies. Made in USA“Do-It-Yourself”ASSEMBLY INSTRUCTIONS1. Using a flat tip screwdriver, remove lid from connector.2. Cut back extension wire jacket (if applicable) 5/8”, strip back individual wires ¼”.3. Remove the elastomer strain relief from the connector. Insert wires into the strain relief until flush with the extensionwire outer jacket (5/8”).4. Loosen the two wire terminal screws (Approximately 3 ½ turns counter clockwise) using a small flat tipscrewdriver.5. Insert the stripped Red* wire under the (-) terminal screw, and the remaining wire under the (+) terminal screw.Tighten down the two terminal screws.6. Install the lid and tighten down the lid screw.*Color may vary outside of the USA.。
MAX6369KA+T中文资料
General DescriptionThe MAX6369–MAX6374 are pin-selectable watchdog timers that supervise microprocessor (µP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeated-ly toggle the watchdog input (WDI) before the selected watchdog timeout period elapses to demonstrate that the system is processing code properly. If the µP does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watch-dog (WDO ) output to signal that the system is not exe-cuting the desired instructions within the expected time frame. The watchdog output pulse can be used to reset the µP or interrupt the system to warn of processing errors.The MAX6369–MAX6374 are flexible watchdog timer supervisors that can increase system reliability through notification of code execution errors. The family offers several pin-selectable watchdog timing options to match a wide range of system timing applications:•Watchdog startup delay: provides an initial delay before the watchdog timer is started.•Watchdog timeout period: normal operating watch-dog timeout period after the initial startup delay.•Watchdog output/timing options: open drain (100ms)or push-pull (1ms).The MAX6369–MAX6374 operate over a +2.5V to +5.5V supply range and are available in miniature 8-pin SOT23 packages.________________________ApplicationsEmbedded Control Systems Industrial ControllersCritical µP and Microcontroller (µC) Monitoring AutomotiveTelecommunications NetworkingFeatures♦Precision Watchdog Timer for Critical µP Applications ♦Pin-Selectable Watchdog Timeout Periods ♦Pin-Selectable Watchdog Startup Delay Periods ♦Ability to Change Watchdog Timing Characteristics Without Power Cycling ♦Open-Drain or Push-Pull Pulsed Active-Low Watchdog Output ♦Watchdog Timer Disable Feature ♦+2.5V to +5.5V Operating Voltage ♦8µA Low Supply Current♦No External Components Required ♦Miniature 8-Pin SOT23 PackageMAX6369–MAX6374Pin-Selectable Watchdog Timers19-1676; Rev 3; 11/05Ordering InformationPin Configuration appears at end of data sheet.Note:All devices are available in tape-and-reel only. Required order increment is 2,500 pieces.Devices are available in both leaded and lead-free packaging.Specify lead-free by replacing “-T” with “+T” when ordering.Selector GuideFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at1-888-629-4642, or visit Maxim’s website at .M A X 6369–M A X 6374Pin-Selectable Watchdog Timers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = +2.5V to +5.5V, SET_ = V CC or GND, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C andStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Terminal Voltage (with respect to GND)V CC .....................................................................-0.3V to +6V WDI.....................................................................-0.3V to +6V WDO (Open Drain: MAX6369/71/73).................-0.3V to +6V WDO (Push-Pull: MAX6370/72/74 .......-0.3V to (V CC + 0.3V)SET0, SET1, SET2................................-0.3V to (V CC + 0.3V)Maximum Current, Any Pin (input/output)...........................20mAContinuous Power Dissipation (T A = +70°C)SOT23-8 (derate 8.75mW/°C above +70°C)...............700mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°C V CC Rise or Fall Rate......................................................0.05V/µsMAX6369–MAX6374Pin-Selectable Watchdog Timers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)M A X 6369–M A X 6374Pin-Selectable Watchdog Timers 4_______________________________________________________________________________________461081214-4010-15356085SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )Typical Operating Characteristics(Circuit of Figure 1, T A = +25°C, unless otherwise noted .)0.9970.9990.9981.0011.0001.0021.003-4010-15356085WATCHDOG TIMEOUT PERIODvs. TEMPERATUREM A X 6369/74-02TEMPERATURE (°C)N O R M A L I Z E D W A T C H D O G T I M E O U T P E R I O DELECTRICAL CHARACTERISTICS (continued)Note 2:Guaranteed by design.Note 3:In this setting the watchdog timer is inactive and startup delay ends when WDI sees its first level transition. See SelectingDevice Timing for more information.Note 4:After power-up, or a setting change, there is an internal setup time during which WDI is ignored.MAX6369–MAX6374Pin-Selectable Watchdog Timers_______________________________________________________________________________________5Pin DescriptionDetailed DescriptionThe MAX6369–MAX6374 are flexible watchdog circuits for monitoring µP activity. During normal operation, the internal timer is cleared each time the µP toggles the WDI with a valid logic transition (low to high or high to low) within the selected timeout period (t WD ). The WDO remains high as long as the input is strobed within the selected timeout period. If the input is not strobed before the timeout period expires, the watchdog output is asserted low for the watchdog output pulse width (t WDO ). The device type and the state of the three logic control pins (SET0, SET1, and SET2) determine watch-dog timing characteristics. The three basic timing varia-tions for the watchdog startup delay and the normalTable 1 for the timeout characteristics for all devices in the family):•Watchdog Startup Delay:Provides an initial delay before the watchdog timer is started.Allows time for the µP system to power up and initial-ize before assuming responsibility for normal watch-dog timer updates.Includes several fixed or pin-selectable startup delay options from 200µs to 60s, and an option to wait for the first watchdog input transition before starting the watchdog timer.M A X 6369–M A X 6374Pin-Selectable Watchdog Timers 6_______________________________________________________________________________________•Watchdog Timeout Period:Normal operating watchdog timeout period after the initial startup delay.A watchdog output pulse is asserted if a valid watch-dog input transition is not received before the timeout period elapses.Eight pin-selectable timeout period options for each device, from 30µs to 60s.Pin-selectable watchdog timer disable feature.•Watchdog Output/Timing Options:Open drain, active low with 100ms minimum watch-dog output pulse (MAX6369/MAX6371/MAX6373).Push-pull, active low with 1ms minimum watchdog output pulse (MAX6370/MAX6372/MAX6374).Each device has a watchdog startup delay that is initi-ated when the supervisor is first powered or after the user modifies any of the logic control set inputs. The watchdog timer does not begin to count down until theFigure 1. Functional Diagramcompletion of the startup delay period, and no watch-dog output pulses are asserted during the startup delay. When the startup delay expires, the watchdog begins counting its normal watchdog timeout period and waiting for WDI transitions. The startup delay allows time for the µP system to power up and fully ini-tialize before assuming responsibility for the normal watchdog timer updates. Startup delay periods vary between the different devices and may be altered by the logic control set pins. To ensure that the system generates no undesired watchdog outputs, the routine watchdog input transitions should begin before the selected minimum startup delay period has expired. The normal watchdog timeout period countdown is initi-ated when the startup delay is complete. If a valid logic transition is not recognized at WDI before the watchdog timeout period has expired, the supervisor asserts a watchdog output. Watchdog timeout periods vary between the different devices and may be altered by the logic control set pins. To ensure that the system generates no undesired watchdog outputs, the watch-dog input transitions should occur before the selected minimum watchdog timeout period has expired.The startup delay and the watchdog timeout period are determined by the states of the SET0, SET1, and SET2 pins, and by the particular device within the family. For the MAX6369 and MAX6370, the startup delay is equal to the watchdog timeout period. The startup and watchdog timeout periods are pin selectable from 1ms to 60s (minimum).For the MAX6371 and MAX6372, the startup delay is fixed at 60s and the watchdog timeout period is pin selectable from 1ms to 60s (minimum).The MAX6373/MAX6374 provide two timing variations for the startup delay and normal watchdog timeout. Five of the pin-selectable modes provide startup delays from 200µs to 60s minimum, and watchdog timeout delays from 3ms to 10s minimum. Two of the selectable modes do not initiate the watchdog timer until the device receives its first valid watchdog input transition (there is no fixed period by which the first input must be received). These two extended startup delay modesare useful for applications requiring more than 60s for system initialization.All the MAX6369–MAX6374 devices may be disabledwith the proper logic control pin setting (Table 1).Applications InformationInput Signal Considerations Watchdog timing is measured from the last WDI risingor falling edge associated with a pulse of at least 100nsin width. WDI transitions are ignored when WDO is asserted, and during the startup delay period (Figure2). Watchdog input transitions are also ignored for asetup period, t SETUP, of up to 300µs after power-up ora setting change (Figure 3).Selecting Device TimingSET2, SET1, and SET0 program the startup delay and watchdog timeout periods (Table 1). Timeout settingscan be hard wired, or they can be controlled with logicgates and modified during operation. To ensure smooth transitions, the system should strobe WDI immediately before the timing settings are changed. This minimizesthe risk of initializing a setting change too late in thetimer countdown period and generating undesired watchdog outputs. After changing the timing settings,two outcomes are possible based on WDO. If the change is made while WDO is asserted, the previous setting is allowed to finish, the characteristics of thenew setting are assumed, and the new startup phase is entered after a 300µs setup time (t SETUP) elapses. Ifthe change is made while WDO is not asserted, thenew setting is initiated immediately, and the new start-up phase is entered after the 300µs setup time elapses.MAX6369–MAX6374Pin-Selectable Watchdog Timers_______________________________________________________________________________________7 Figure 3. Setting Change TimingM A X 6369–M A X 6374Pin-Selectable Watchdog TimersSelecting 011 (SET2 = 0, SET1 = 1, SET0 = 1) disables the watchdog timer function on all devices in the family.Operation can be reenabled without powering down by changing the set inputs to the new desired setting. The device assumes the new selected timing characteris-tics and enter the startup phase after the 300µs setup time elapses (Figure 3).The MAX6373/MAX6374 offer a first-edge feature. In first-edge mode (settings 101 or 110, Table 1), the internal timer does not control the startup delay period.Instead, startup terminates when WDI sees a transition.If changing to first-edge mode while the device is oper-ating, disable mode must be entered first. It is then safe to select first-edge mode. Entering disable mode first ensures the output is unasserted when selecting first-edge mode and removes the danger of WDI being masked out.OutputThe MAX6369/MAX6371/MAX6373 have an active-low,open-drain output that provides a watchdog output pulse of 100ms. This output structure sinks current when WDO is asserted. Connect a pullup resistor from WDO to any supply voltage up to +5.5V.Select a resistor value large enough to register a logic low (see Ele ctrical Characte ristics ), and small enoughto register a logic high while supplying all input current and leakage paths connected to the WDO line. A 10k Ωpullup is sufficient in most applications. The MAX6370/MAX6372/MAX6374 have push-pull outputs that pro-vide an active-low watchdog output pulse of 1ms.When WDO deasserts, timing begins again at the beginning of the watchdog timeout period (Figure 2).Usage in Noisy EnvironmentsIf using the watchdog timer in an electrically noisy envi-ronment, a bypass capacitor of 0.1µF should be con-nected between V CC and GND as close to the device as possible, and no further away than 0.2 inches.________________Watchdog SoftwareConsiderationsTo help the watchdog timer monitor software execution more closely, set and reset the watchdog input at differ-ent points in the program, rather than pulsing the watch-dog input high-low-high or low-high-low. This technique avoids a stuck loop, in which the watchdog timer would continue to be reset inside the loop, keeping the watch-dog from timing out. Figure 4 shows an example of a flow diagram where the I/O driving the watchdog input is set high at the beginning of the program, set low at the end of every subroutine or loop, then set high again when the program returns to the beginning. If the pro-gram should hang in any subroutine, the problem would be quickly corrected, since the I/O is continually set low and the watchdog timer is allowed to time out, causing WDO to pulse.Figure 4. Watchdog Flow DiagramChip InformationTRANSISTOR COUNT: 1500PROCESS: BiCMOSPin ConfigurationMaxim cannot assume re sponsibility for use of any circuitry othe r than circuitry e ntire ly e mbodie d in a Maxim product. No circuit pate nt lice nse s are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2005 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products, Inc.。
XC6385中文资料
概 要
XC6383系列是PFM(频率)工作模式升压型DC/DC转换器。采用 COMS工艺和激光微调技术，达到了低电流消耗、高精度。 该器件降低了应用于传呼器时多成为问题的转换时的高频噪 声。在2.0V～7.0V范围内，能以0.1V间隔设定输出电压。最大 工作频率为100kHz。 由于内置开关晶体管，只需外置线圈、二极管、电容器3种元 件，可构建升压电路。 此外，还备有具备用以停止工作以此抑制电流消耗的CE(停机 控制)功能、以及可用于反激电路的、有独立VDD端(将电源和 检测电压端分开)的产品。 备有SOT-89-5以及超小型的SOT-23和SOT-25封装。
引脚排列
3
SOT-23 (TOP VIEW)
1
2
5
4
SOT-25 (TOP VIEW)
123
SOT-89 (TOP VIEW)
1
2
3
5
4
SOT-89-5 (TOP VIEW)
1
2
3
引脚说明
ቤተ መጻሕፍቲ ባይዱ
(2) XC6385C
引脚序号
SOT-25 SOT-89-5
4
5
2
2
5
4
1
3
3
1
符号
VSS VOUT LX CE NC
元器４件．交D易C/网DCw转ww换.c器ecb2_b__._c_o_m____________________________________________________________________________________
XC6385系列 传呼器用PFM(频率)控制DC/DC控制器/转换器
选择指南
开始
3 管脚型 内置晶体管
MAX1963AETT中文资料
General DescriptionThe MAX1963A/MAX1976A low-dropout linear regula-tors operate from a +1.62V to +3.6V supply and deliver a guaranteed 300mA continuous load current with a low 100mV dropout. The high-accuracy (±0.5%) output voltage is preset to an internally trimmed voltage in the +0.75V to +3.0V range. An active-low, open-drain reset output remains asserted for at least 2.2ms (MAX1963A)or 70ms (MAX1976A) after the output voltage reaches regulation. These devices are offered in thin SOT23 and thin DF N packages. An internal pMOS pass transistor allows the low supply current to remain independent of load and dropout voltage, making these devices ideal for portable battery-powered equipment.ApplicationsNotebook/Handheld Computers Cellular/Smart/PDA Phones DSC, CD/MP3 Players PCMCIA CardsFeatures♦Low 1.62V Minimum Input Voltage ♦Guaranteed 300mA Output Current ♦±2.5% Accuracy Over Load/Line/Temp ♦Low 100mV Dropout at 300mA Load ♦2.2ms (MAX1963A) or 70ms (MAX1976A) RESET Output Flag ♦Supply Current Independent of Load and Dropout Voltage ♦Logic-Controlled Shutdown♦Thermal-Overload and Short-Circuit Protection ♦Preset Output Voltages (0.75V to 3.0V)♦Tiny 6-Pin Thin SOT23 Package (<1.1mm High)♦TDFN Package (<0.8mm High)MAX1963A/MAX1976ALow-Input-Voltage, 300mA LDO Regulatorswith RESET in SOT and TDFN________________________________________________________________Maxim Integrated Products1Ordering Information19-3684; Rev 0; 5/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Pin Configurations*Insert the desired three-digit suffix (see the Selector Guide) into the blanks to complete the part number. Contact the factory for other output voltages.Selector Guide appears at end of data sheet.Typical Operating CircuitM A X 1963A /M A X 1976ALow-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.IN, SHDN , RESET to GND.....................................-0.3V to +4.0V OUT to GND ................................................-0.3V to (V IN + 0.3V)Output Short-Circuit Duration.....................................Continuous Continuous Power Dissipation (T A = +70°C)6-Pin SOT23 (derate 9.1mW/°C above +70°C)............727mW 6-Pin TDFN (derate 24.4mW/°C above +70°C).........1951mW 8-Pin TDFN (derate 11.9mW/°C above +70°C)........953.5mWOperating Temperature Range ...........................-40°C to +85°C Junction Temperature.....................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CMAX1963A/MAX1976ALow-Input-Voltage, 300mA LDO Regulatorswith RESET in SOT and TDFN_______________________________________________________________________________________3Note 2:The dropout voltage is defined as V IN - V OUT , when V OUT is 4% lower than the value of V OUT when V IN = V OUT + 0.5V.Typical Operating Characteristics(V IN = (V OUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, C IN = 1µF, C OUT = 4.7µF, T A = +25°C, unless otherwise noted.)OUTPUT VOLTAGE ACCURACYvs. LOAD CURRENTLOAD CURRENT (mA)O U T P U T V O L T A G E A C C U R A C Y (%)25020015010050-0.10.10.2-0.2300OUTPUT VOLTAGE ACCURACYvs. INPUT VOLTAGEINPUT VOLTAGE (V)O U T P U T V O L T A G E A C C U R A C Y (%)3.02.62.21.8-0.250.250.50-0.501.43.4OUTPUT VOLTAGE ACCURACYvs. TEMPERATURETEMPERATURE (°C)O U T P U T V O L T A G E A C C U R A C Y (%)603510-15-1.0-0.500.51.01.5-1.5-4085ELECTRICAL CHARACTERISTICS (continued)(V IN = (V OUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, C IN = 1µF, C OUT = 4.7µF, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)M A X 1963A /M A X 1976ALow-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN 4_______________________________________________________________________________________GROUND-PIN CURRENT vs. LOAD CURRENTLOAD CURRENT (mA)G R O U N D -P I N C U R R E N T (µA )1001100.1708090100110120600.011000GROUND-PIN CURRENT vs. INPUT VOLTAGEINPUT VOLTAGE (V)G R O U N D -P I N C U RR E N T (µA )3.22.82.42.01.62040608010012001.23.6GROUND-PIN CURRENT vs. TEMPERATURETEMPERATURE (°C)G R O U N D -P I N C U R R E N T (µA )604020-206070809010011012050-4080DROPOUT VOLTAGE vs. LOAD CURRENTLOAD CURRENT (mA)V D R O P O U T (m V )250200150100504020608010012000300POWER-SUPPLY REJECTION RATIOvs. FREQUENCYFREQUENCY (kHz)P S R R (d B )10010110203040506070800.11000LINE-TRANSIENT RESPONSEMAX1963/76 toc0940µs/divV IN 500mV/div1.5V 10mV/div AC-COUPLEDV OUT3.5VTypical Operating Characteristics (continued)(V IN = (V OUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, C IN = 1µF, C OUT = 4.7µF, T A = +25°C, unless otherwise noted.)LINE-TRANSIENT RESPONSENEAR DROPOUTMAX1963/76 toc1040µs/divV IN 500mV/div1.5V 10mV/div AC-COUPLEDV OUT1.8VMAX1963A/MAX1976ALow-Input-Voltage, 300mA LDO Regulatorswith RESET in SOT and TDFN_______________________________________________________________________________________5LOAD-TRANSIENT RESPONSEMAX1963/76 toc1120µs/div200mA/div20mV/divAC-COUPLED200mA V OUTI OUT 20mAV IN = 3.6V V OUT = 1.5VLOAD-TRANSIENT RESPONSENEAR DROPOUTMAX1963/76 toc1220µs/div200mA/div20mV/div AC-COUPLED200mA V OUTV IN = 1.8V V OUT = 1.5VI OUT 20mATypical Operating Characteristics (continued)(V IN = (V OUT + 0.5V) or 1.8V, whichever is greater; SHDN = IN, C IN = 1µF, C OUT = 4.7µF, T A = +25°C, unless otherwise noted.)SHUTDOWN RESPONSEMAX1963/76 toc13100µs/div 1V/div500mV/divV OUTV SHDNMAX1963/76 toc1440ms/div1V/div1V/div1V/divV OUT000V SHDNV RESETMAX1976ASHUTDOWN/RESET RESPONSEMAX1963/76 toc15200ms/div2V/div1V/div1V/divV OUTV IN000V MAX1976ALINE/RESET RESPONSEM A X 1963A /M A X 1976ALow-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN 6_______________________________________________________________________________________Pin DescriptionDetailed Description The MAX1963A/MAX1976A are low-dropout, high-accu-racy, low-quiescent-current linear regulators designed primarily for battery-powered applications. These devices supply loads up to 300mA and are available with preset output voltages from +0.75V to +3.0V. As illustrated in F igure 1, the MAX1963A/MAX1976A consist of a refer-ence, an error amplifier, a p-channel pass transistor, an internal feedback voltage-divider, and a power-good comparator.The reference is connected to the error amplifier, which compares this reference with the feedback voltage and amplifies the difference. If the feedback voltage is lower than the reference voltage, the pass-transistor gate is pulled lower, which allows more current to pass to the output and increases the output voltage. If the feedback voltage is too high, the pass-transistor gate is pulled up, allowing less current to pass to the output.Internal p-Channel Pass Transistor The MAX1963A/MAX1976A feature a 0.33Ω(R DS(ON)) p-channel MOSF ET pass transistor. Unlike similar designs using pnp pass transistors, p-channel MOSFETs require no base drive, which reduces quies-cent current. The pnp-based regulators also waste con-siderable current in dropout when the pass transistor saturates and use high base-drive currents under large loads. The MAX1963A/MAX1976A do not suffer from these problems and consume only 90µA (typ) of quies-cent current under heavy loads, as well as in dropout.Shutdown Pull SHDN low to enter shutdown. During shutdown, the output is disconnected from the input, an internal 1.5kΩresistor pulls OUT to GND, RESET is actively pulled low, and the supply current drops below 1µA.RESET Output The MAX1963A/MAX1976A microprocessor (µP) supervi-sory circuitry asserts a guaranteed logic-low reset during power-up, power-down, and brownout conditions down to +1V. RESET asserts when V OUT is below the reset threshold and remains asserted for at least t RP after V OUT rises above the reset threshold of regulation.Current Limit The MAX1963A/MAX1976A monitor and control the pass transistor’s gate voltage, limiting the output current to 450mA (min). If the output exceeds I LIM, the MAX1963A/ MAX1976A output voltage drops.Thermal-Overload Protection Thermal-overload protection limits total power dissipa-tion in the MAX1963A/MAX1976A. When the junction temperature exceeds T J= +165°C, a thermal sensorturns off the pass transistor, allowing the IC to cool. The thermal sensor turns the pass transistor on again afterthe junction temperature cools by 15°C, resulting in a pulsed output during continuous thermal-overload con-ditions. Thermal-overload protection safeguards theMAX1963A/MAX1976A in the event of fault conditions.F or continuous operation, do not exceed the absolute maximum junction-temperature rating of T J= +150°C.Operating Region and Power DissipationThe MAX1963A/MAX1976A maximum power dissipa-tion depends on the thermal resistance of the IC pack-age and circuit board, the temperature difference between the die junction and ambient air, and the rateof airflow. The power dissipated in the device is P =I OUT✕(V IN- V OUT). The maximum allowed power dissi-pation is:P MAX= (T J(MAX)- T A) / (θJC+ θCA)where (T J(MAX)- T A) is the temperature difference between the MAX1963A/MAX1976A die junction andthe surrounding air, θJC is the thermal resistance of the junction to the case, and θCA is the thermal resistancefrom the case through the PC board, copper traces,and other materials to the surrounding air. F or best heatsinking, expand the copper connected to the exposed paddle or GND.The MAX1963A/MAX1976A deliver up to 300mA and operate with an input voltage up to +3.6V. However,when using the 6-pin SOT23 version, high output cur-rents can only be sustained when the input-output dif-ferential voltage is less than 2V, as shown in Figure 2.The maximum allowed power dissipation for the 6-pinTDFN is 1.951W at T A= +70°C. Figure 3 shows that the maximum input-output differential voltage is not limitedby the TDFN package power rating.Applications InformationCapacitor Selection andRegulator Stability Capacitors are required at the MAX1963A/MAX1976Ainput and output for stable operation over the full tem-perature range and with load currents up to 300mA. Connect a 1µF ceramic capacitor between IN and GNDand a 4.7µF low-ESR ceramic capacitor between OUTand GND. The input capacitor (C IN) lowers the source impedance of the input supply. Use larger output capacitors to reduce noise and improve load-transient response, stability, and power-supply rejection.The output capacitor’s equivalent series resistance (ESR) affects stability and output noise. Use outputMAX1963A/MAX1976ALow-Input-Voltage, 300mA LDO Regulatorswith RESET in SOT and TDFN _______________________________________________________________________________________7M A X 1963A /M A X 1976Acapacitors with an ESR of 30m Ωor less to ensure sta-bility and optimize transient response. Surface-mount ceramic capacitors have very low ESR and are com-monly available in values up to 10µF. Connect C IN and C OUT as close to the MAX1963A/MAX1976A as possi-ble to minimize the impact of PC board trace induc-tance.Noise, PSRR, and Transient ResponseThe MAX1963A/MAX1976A are designed to operate with low dropout voltages and low quiescent currents in battery-powered systems while still maintaining good noise, transient response, and AC rejection. See the T ypical Operating Characteristics for a plot of Power-Supply Rejection Ratio (PSRR) versus F requency.When operating from noisy sources, improved supply-noise rejection and transient response can be achieved by increasing the values of the input and output bypass capacitors and through passive filtering techniques.The MAX1963A/MAX1976A load-transient response (see the T ypical Operating Characteristics ) shows two components of the output response: a near-zero DC shift from the output impedance due to the load-current change, and the transient response. A typical transient response for a step change in the load current from 20mA to 200mA is 20mV. Increasing the output capacitor’s value and decreasing the ESR attenuates the overshoot.Input-Output (Dropout) VoltageA regulator’s minimum input-output voltage difference (dropout voltage) determines the lowest usable supply voltage. In battery-powered systems, this determines the useful end-of-life battery voltage. Because the MAX1963A/MAX1976A use a p-channel MOSF ET pass transistor, the dropout voltage is a function of drain-to-source on-resistance (R DS(ON) = 0.33Ω) multiplied by the load current (see the T ypical Operating Characteristics ).V DROPOUT = V IN - V OUT = 0.33Ω✕I OUTThe MAX1963A/MAX1976A ground current reduces to 70µA in dropout.Low-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN 8_______________________________________________________________________________________MAX1963A/MAX1976ALow-Input-Voltage, 300mA LDO Regulatorswith RESET in SOT and TDFN_______________________________________________________________________________________9Chip InformationTRANSISTOR COUNT: 2556PROCESS: BiCMOSMinimum order quantity is 15,000 units.M A X 1963A /M A X 1976ALow-Input-Voltage, 300mA LDO Regulators with RESET in SOT and TDFN 10______________________________________________________________________________________Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)MAX1963A/MAX1976Awith RESET in SOT and TDFN______________________________________________________________________________________11Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages.)M A X 1963A /M A X 1976Awith RESET in SOT and TDFN 12______________________________________________________________________________________Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)MAX1963A/MAX1976Awith RESET in SOT and TDFN______________________________________________________________________________________13Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)M A X 1963A /M A X 1976Awith RESET in SOT and TDFN 14______________________________________________________________________________________MAX1963A/MAX1976Awith RESET in SOT and TDFNMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________15©2005 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products, Inc. Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to /packages.)。
SC225中文资料
SMT - on ceramic technology Metal case Isolation I/O 500Veff EMI/RFI radiated EN55022-B Short circuit proof 100% burn-in and parameter test Switching frequency: 200kHz
ISO 9001 Registered
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Connections Pin 1 .................................... +Input Pin 2 ..................................... -Input Pin 3 ............................... +Output 1 Pin 4 ................................ -Output 1 Pin 5 ............................... +Output 2 Pin 6 ................................ -Output 2 Pin 7 ..................................... no pin
DC/DC Converter SC225
MAX6373中文资料
General DescriptionThe MAX6369–MAX6374 are pin-selectable watchdog timers that supervise microprocessor (µP) activity and signal when a system is operating improperly. During normal operation, the microprocessor should repeated-ly toggle the watchdog input (WDI) before the selected watchdog timeout period elapses to demonstrate that the system is processing code properly. If the µP does not provide a valid watchdog input transition before the timeout period expires, the supervisor asserts a watch-dog (WDO ) output to signal that the system is not exe-cuting the desired instructions within the expected time frame. The watchdog output pulse can be used to reset the µP or interrupt the system to warn of processing errors.The MAX6369–MAX6374 are flexible watchdog timer supervisors that can increase system reliability through notification of code execution errors. The family offers several pin-selectable watchdog timing options to match a wide range of system timing applications:•Watchdog startup delay: provides an initial delay before the watchdog timer is started.•Watchdog timeout period: normal operating watch-dog timeout period after the initial startup delay.•Watchdog output/timing options: open drain (100ms)or push-pull (1ms).The MAX6369–MAX6374 operate over a +2.5V to +5.5V supply range and are available in miniature 8-pin SOT23 packages.________________________ApplicationsEmbedded Control Systems Industrial ControllersCritical µP and Microcontroller (µC) Monitoring AutomotiveTelecommunications NetworkingFeatureso Precision Watchdog Timer for Critical µP Applications o Pin-Selectable Watchdog Timeout Periods o Pin-Selectable Watchdog Startup Delay Periods o Ability to Change Watchdog Timing Characteristics Without Power Cycling o Open-Drain or Push-Pull Pulsed Active-Low Watchdog Output o Watchdog Timer Disable Feature o +2.5V to +5.5V Operating Voltage o 8µA Low Supply Currento No External Components Required o Miniature 8-Pin SOT23 PackageMAX6369–MAX6374Pin-Selectable Watchdog Timers19-1676; Rev 2; 2/03Ordering InformationPin Configuration appears at end of data sheet.Note:All devices are available in tape-and-reel only. Required order increment is 2,500 pieces.Selector GuideFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at1-888-629-4642, or visit Maxim’s website at .M A X 6369–M A X 6374Pin-Selectable Watchdog Timers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V= +2.5V to +5.5V, SET_ = V or GND, T = -40°C to +85°C, unless otherwise noted. Typical values are at T = +25°C and Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Terminal Voltage (with respect to GND)V CC .....................................................................-0.3V to +6V WDI.....................................................................-0.3V to +6V WDO (Open Drain: MAX6369/71/73).................-0.3V to +6V WDO (Push-Pull: MAX6370/72/74 .......-0.3V to (V CC + 0.3V)SET0, SET1, SET2................................-0.3V to (V CC + 0.3V)Maximum Current, Any Pin (input/output)...........................20mAContinuous Power Dissipation (T A = +70°C)SOT23-8 (derate 8.75mW/°C above +70°C)...............700mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°C V CC Rise or Fall Rate......................................................0.05V/µsMAX6369–MAX6374Pin-Selectable Watchdog Timers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)M A X 6369–M A X 6374Pin-Selectable Watchdog Timers 4_______________________________________________________________________________________461081214-4010-15356085SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )Typical Operating Characteristics(Circuit of Figure 1, T A = +25°C, unless otherwise noted .)0.9970.9990.9981.0011.0001.0021.003-4010-15356085WATCHDOG TIMEOUT PERIODvs. TEMPERATUREM A X 6369/74-02TEMPERATURE (°C)N O R M A L I Z E D W A T C H D O G T I M E O U T P E R I O DELECTRICAL CHARACTERISTICS (continued)Note 2:Guaranteed by design.Note 3:In this setting the watchdog timer is inactive and startup delay ends when WDI sees its first level transition. See SelectingDevice Timing for more information.Note 4:After power-up, or a setting change, there is an internal setup time during which WDI is ignored.MAX6369–MAX6374Pin-Selectable Watchdog Timers_______________________________________________________________________________________5Pin DescriptionDetailed DescriptionThe MAX6369–MAX6374 are flexible watchdog circuits for monitoring µP activity. During normal operation, the internal timer is cleared each time the µP toggles the WDI with a valid logic transition (low to high or high to low) within the selected timeout period (t WD ). The WDO remains high as long as the input is strobed within the selected timeout period. If the input is not strobed before the timeout period expires, the watchdog output is asserted low for the watchdog output pulse width (t WDO ). The device type and the state of the three logic control pins (SET0, SET1, and SET2) determine watch-dog timing characteristics. The three basic timing varia-tions for the watchdog startup delay and the normalTable 1 for the timeout characteristics for all devices in the family):•Watchdog Startup Delay:Provides an initial delay before the watchdog timer is started.Allows time for the µP system to power up and initial-ize before assuming responsibility for normal watch-dog timer updates.Includes several fixed or pin-selectable startup delay options from 200µs to 60s, and an option to wait for the first watchdog input transition before starting the watchdog timer.M A X 6369–M A X 6374Pin-Selectable Watchdog Timers 6_______________________________________________________________________________________•Watchdog Timeout Period:Normal operating watchdog timeout period after the initial startup delay.A watchdog output pulse is asserted if a valid watch-dog input transition is not received before the timeout period elapses.Eight pin-selectable timeout period options for each device, from 30µs to 60s.Pin-selectable watchdog timer disable feature.•Watchdog Output/Timing Options:Open drain, active low with 100ms minimum watch-dog output pulse (MAX6369/MAX6371/MAX6373).Push-pull, active low with 1ms minimum watchdog output pulse (MAX6370/MAX6372/MAX6374).Each device has a watchdog startup delay that is initi-ated when the supervisor is first powered or after the user modifies any of the logic control set inputs. The watchdog timer does not begin to count down until theFigure 1. Functional Diagramcompletion of the startup delay period, and no watch-dog output pulses are asserted during the startup delay. When the startup delay expires, the watchdog begins counting its normal watchdog timeout period and waiting for WDI transitions. The startup delay allows time for the µP system to power up and fully ini-tialize before assuming responsibility for the normal watchdog timer updates. Startup delay periods vary between the different devices and may be altered by the logic control set pins. To ensure that the system generates no undesired watchdog outputs, the routine watchdog input transitions should begin before the selected minimum startup delay period has expired. The normal watchdog timeout period countdown is initi-ated when the startup delay is complete. If a valid logic transition is not recognized at WDI before the watchdog timeout period has expired, the supervisor asserts a watchdog output. Watchdog timeout periods vary between the different devices and may be altered by the logic control set pins. To ensure that the system generates no undesired watchdog outputs, the watch-dog input transitions should occur before the selected minimum watchdog timeout period has expired.The startup delay and the watchdog timeout period are determined by the states of the SET0, SET1, and SET2 pins, and by the particular device within the family. For the MAX6369 and MAX6370, the startup delay is equal to the watchdog timeout period. The startup and watchdog timeout periods are pin selectable from 1ms to 60s (minimum).For the MAX6371 and MAX6372, the startup delay is fixed at 60s and the watchdog timeout period is pin selectable from 1ms to 60s (minimum).The MAX6373/MAX6374 provide two timing variations for the startup delay and normal watchdog timeout. Five of the pin-selectable modes provide startup delays from 200µs to 60s minimum, and watchdog timeout delays from 3ms to 10s minimum. Two of the selectable modes do not initiate the watchdog timer until the device receives its first valid watchdog input transition (there is no fixed period by which the first input must be received). These two extended startup delay modesare useful for applications requiring more than 60s for system initialization.All the MAX6369–MAX6374 devices may be disabledwith the proper logic control pin setting (Table 1).Applications InformationInput Signal Considerations Watchdog timing is measured from the last WDI risingor falling edge associated with a pulse of at least 100nsin width. WDI transitions are ignored when WDO is asserted, and during the startup delay period (Figure2). Watchdog input transitions are also ignored for asetup period, t SETUP, of up to 300µs after power-up ora setting change (Figure 3).Selecting Device TimingSET2, SET1, and SET0 program the startup delay and watchdog timeout periods (Table 1). Timeout settingscan be hard wired, or they can be controlled with logicgates and modified during operation. To ensure smooth transitions, the system should strobe WDI immediately before the timing settings are changed. This minimizesthe risk of initializing a setting change too late in thetimer countdown period and generating undesired watchdog outputs. After changing the timing settings,two outcomes are possible based on WDO. If the change is made while WDO is asserted, the previous setting is allowed to finish, the characteristics of thenew setting are assumed, and the new startup phase is entered after a 300µs setup time (t SETUP) elapses. Ifthe change is made while WDO is not asserted, thenew setting is initiated immediately, and the new start-up phase is entered after the 300µs setup time elapses.MAX6369–MAX6374Pin-Selectable Watchdog Timers_______________________________________________________________________________________7 Figure 3. Setting Change TimingM A X 6369–M A X 6374Pin-Selectable Watchdog TimersSelecting 011 (SET2 = 0, SET1 = 1, SET0 = 1) disables the watchdog timer function on all devices in the family.Operation can be reenabled without powering down by changing the set inputs to the new desired setting. The device assumes the new selected timing characteris-tics and enter the startup phase after the 300µs setup time elapses (Figure 3).The MAX6373/MAX6374 offer a first-edge feature. In first-edge mode (settings 101 or 110, Table 1), the internal timer does not control the startup delay period.Instead, startup terminates when WDI sees a transition.If changing to first-edge mode while the device is oper-ating, disable mode must be entered first. It is then safe to select first-edge mode. Entering disable mode first ensures the output is unasserted when selecting first-edge mode and removes the danger of WDI being masked out.OutputThe MAX6369/MAX6371/MAX6373 have an active-low,open-drain output that provides a watchdog output pulse of 100ms. This output structure sinks current when WDO is asserted. Connect a pullup resistor from WDO to any supply voltage up to +5.5V.Select a resistor value large enough to register a logic low (see Electrical Characteristics ), and small enoughto register a logic high while supplying all input current and leakage paths connected to the WDO line. A 10k Ωpullup is sufficient in most applications. The MAX6370/MAX6372/MAX6374 have push-pull outputs that pro-vide an active-low watchdog output pulse of 1ms.When WDO deasserts, timing begins again at the beginning of the watchdog timeout period (Figure 2).Usage in Noisy EnvironmentsIf using the watchdog timer in an electrically noisy envi-ronment, a bypass capacitor of 0.1µF should be con-nected between V CC and GND as close to the device as possible, and no further away than 0.2 inches.________________Watchdog SoftwareConsiderationsTo help the watchdog timer monitor software execution more closely, set and reset the watchdog input at differ-ent points in the program, rather than pulsing the watch-dog input high-low-high or low-high-low. This technique avoids a stuck loop, in which the watchdog timer would continue to be reset inside the loop, keeping the watch-dog from timing out. Figure 4 shows an example of a flow diagram where the I/O driving the watchdog input is set high at the beginning of the program, set low at the end of every subroutine or loop, then set high again when the program returns to the beginning. If the pro-gram should hang in any subroutine, the problem would be quickly corrected, since the I/O is continually set low and the watchdog timer is allowed to time out, causing WDO to pulse.Figure 4. Watchdog Flow DiagramChip InformationTRANSISTOR COUNT: 1500PROCESS: BiCMOSPin ConfigurationMaxim cannot assume responsibility f or use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.。
MAX6375XR26-T中文资料
General DescriptionThe MAX6375–MAX6380 are ultra-low-power circuits used for monitoring battery, power-supply, and regulat-ed system voltages. Each detector contains a precision bandgap reference, comparator, and internally trimmed resistors that set specified trip threshold voltages.These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from 2.5V to 5V.These circuits perform a single function: they assert an output signal whenever the V CC supply voltage falls below a preset threshold. The devices are differentiated by their output logic configurations and preset thresh-old voltages. The MAX6375/MAX6378 (push-pull) and MAX6377/MAX6380 (open-drain) have an active-low output (OUT is logic low when V CC is below V TH ). The MAX6376/MAX6379 have an active-high push-pull out-put (OUT is logic high when V CC is below V TH ). All parts are guaranteed to be in the correct output logic state for V CC down to 1V. The detector is designed to ignore fast transients on V CC . The MAX6375/MAX6376/MAX6377 have voltage thresholds between 2.20V and 3.08V in approximately 100mV increments. The MAX6378/MAX6379/MAX6380 have voltage thresholds between 3.30V and 4.63V in approximately 100mV increments.Ultra-low supply current of 500nA (MAX6375/MAX6376/MAX6377) makes these parts ideal for use in portable equipment. All six devices are available in a space-sav-ing SC70 package or in a tiny SOT23 package.ApplicationsPrecision Battery Monitoring Load Switching/Power SequencingPower-Supply Monitoring in Digital/Analog Systems Portable/Battery-Powered EquipmentFeatureso Ultra-Low 500nA Supply Current (MAX6375/MAX6376/MAX6377)o Thresholds Available from 2.20V to 4.63V in Approximately 100mV Incrementso ±2.5% Threshold Accuracy Over Temperature o Low Costo Available in Three Versions: Push-Pull OUT ,Push-Pull OUT, and Open-Drain OUT o Power-Supply Transient Immunity o No External Components o Available in Either a 3-Pin SC70 or 3-Pin SOT23 PackageMAX6375–MAX63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors________________________________________________________________Maxim Integrated Products 1Pin Configuration19-1721; Rev 2; 2/03*The MAX6375/MAX6376/MAX6377 are available in factory-pre-set thresholds from 2.20V to 3.08V, in approximately 0.1V incre-ments. The MAX6378/MAX6379/MAX6380 are available infactory-preset thresholds from 3.30V to 4.63V, in approximately 0.1V increments. Choose the desired threshold suffix fromTable 1 and insert it in the blank spaces following R.There are 21 standard versions, with a required order increment of 2500pieces. Sample stock is generally held on the standard versions only (see the Selector Guide). The required order increment is 10,000 pieces for nonstandard versions (Table 2). Contact facto-ry for availability. All devices available in tape-and-reel only.Selector Guide appears at end of data sheet.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering information continued at end of data sheetM A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = full range, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C and V CC = 3V.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Terminal Voltage (with respect to GND)V CC ...........................................................................-0.3V to +6V OUT, OUT (push-pull)................................-0.3V to (V CC + 0.3V)OUT (open-drain).....................................................-0.3V to +6V Input Current (V CC ).............................................................20mA Output Current (OUT, OUT )................................................20mAContinuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.17mW/°C above +70°C)...........174mW 3-Pin SOT23 (derate 4mW/°C above +70°C)..............320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°CNote 1:Production tested at +25°C only. Overtemperature limits are guaranteed by design, not production tested.MAX6375–MAX63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors__________________________________________Typical Operating Characteristics(V CC = 5V, T A = +25°C, unless otherwise noted.)00.30.20.10.40.50.60.70.80.91.0-40-2020406080SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )050100150200-40-2020406080PROPAGATION DELAY (FALLING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )040208060120100140-4020-20406080PROPAGATION DELAY (RISING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )50011001000MAXIMUM TRANSIENT DURATION vs. THRESHOLD OVERDRIVE100300400200THRESHOLD OVERDRIVEV TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )10Pin DescriptionM A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors____________Applications InformationInterfacing to Different Logic Voltage ComponentsThe MAX6377/MAX6380 have an active-low, open-drain output. This output structure sinks current when OUT is asserted. Connect a pullup resistor from OUT to any supply voltage up to 5.50V (Figure 1). Select a resistor value large enough to allow a valid logic low (see Electrical Characteristics ), and small enough to register a logic high while supplying all input current and leakage paths connected to the OUT line.Negative-Going V CC TransientsThese devices are relatively immune to short-duration,negative-going V CC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Threshold Overdrive graph, for which out-put pulses are not generated. The graph shows the maximum pulse width that a negative-going V CC tran-sient may typically have before the devices issue out-put signals. As the amplitude of the transient increases,the maximum-allowable pulse width decreases.Figure 1. Interfacing to Different Logic Voltage ComponentsTable 1. Factory-Trimmed Reset Thresholds ‡3-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors_______________________________________________________________________________________5Table 2. Device Marking Codes and Minimum Order IncrementsMAX6375–MAX6380M A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors 6___________________Chip InformationTRANSISTOR COUNT: 419Selector Guide**S ample stock is generally held on all standard versions.Contact factory for availability of nonstandard versions.Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________7©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.3-Pin, Ultra-Low-Power SC70/SOT23Voltage DetectorsMAX6375–MAX6380Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。
MAX6367PKA44+T中文资料
General DescriptionThe MAX6365–MAX6368 supervisory circuits simplify power-supply monitoring, battery-backup control func-tions, and memory write protection in microprocessor (µP) systems. The circuits significantly improve the size,accuracy, and reliability of modern systems with an ultra-small integrated solution.These devices perform four basic system functions:1) Provide a µP reset output during V CC supply power-up, power-down, and brownout conditions.2) Internally control V CC to backup-battery switching tomaintain data or low-power operation for CMOS RAM, CMOS µPs, real-time clocks, and other digital logic when the main supply fails.3) Provide memory write protection through internalchip-enable gating during supply or processor faults.4) Include one of the following options: a manual resetinput (MAX6365), a watchdog timer function (MAX6366), a battery-on output (MAX6367), or an auxiliary user-adjustable reset input (MAX6368).The MAX6365–MAX6368 operate from V CC supply volt-ages as low as 1.2V. The factory preset reset threshold voltages range from 2.32V to 4.63V (see the Ordering Information ). In addition, each part is offered in three reset output versions: push-pull active low, open-drain active low, or open-drain active high (see the Selector Guide ). The MAX6365–MAX6368 are available in minia-ture 8-pin SOT23 packages.ApplicationsCritical µP/µC Power Portable/Battery-Monitoring Powered Equipment Fax Machines Set-Top Boxes Industrial Control POS EquipmentComputers/ControllersFeatures♦Low +1.2V Operating Supply Voltage (V CC or V BATT )♦Precision Monitoring of +5.0V, +3.3V, +3.0V, and +2.5V Power-Supply Voltages♦On-Board Gating of Chip-Enable Signals, 1.5ns Propagation Delay♦Debounced Manual Reset Input (MAX6365)♦Watchdog Timer, 1.6s Timeout (MAX6366)♦Battery-On Output Indicator (MAX6367)♦Auxiliary User-Adjustable RESET IN (MAX6368)♦Low 10µA Quiescent Supply Current ♦Three Available Output StructuresPush-Pull RESET Open-Drain RESET Open-Drain RESET♦RESET/RESET Valid Down to 1.2V Guaranteed (V CC or V BATT )♦Power-Supply Transient Immunity ♦150ms min Reset Timeout Period ♦Miniature 8-Pin SOT23 PackageMAX6365–MAX6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating________________________________________________________________Maxim Integrated Products1Pin Configurations19-1658; Rev 3; 12/05For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering Information*These parts offer a choice of reset threshold voltages. From the Reset Threshold Ranges table, insert the desired threshold volt-age code in the blank to complete the part number. SOT parts come in tape-and-reel only and must be ordered in 2500-piece increments. See Device Marking Codes for a complete parts list,including SOT top marks and standard threshold versions. See Selector Guide for a listing of device features.Devices are available in both leaded and lead-free packaging.Specify lead-free by replacing “-T” with “+T” when ordering.Typical Operating Circuit appears at end of data sheet.M A X 6365–M A X 6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable GatingABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V = +2.4V to +5.5V, V = +3.0V, CE IN = V , reset not asserted, T = -40°C to +85°C. Typical values are at T = +25°C,Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Terminal Voltages (with respect to GND)V CC , BATT, OUT.......................................................-0.3V to +6V RESET (open drain), RESET (open drain)................-0.3V to +6V BATT ON, RESET (push-pull), RESET IN,WDI, CE IN, CE OUT...........................-0.3V to (V OUT + 0.3V)MR ..............................................................-0.3V to (V CC + 0.3V)Input CurrentV CC Peak ..............................................................................1A V CC Continuous.............................................................250mA BATT Peak.....................................................................250mA BATT Continuous.............................................................40mAGND...............................................................................75mA Output CurrentOUT...............................Short-Circuit Protected for up to 10s RESET, RESET , BATT ON, CE OUT...............................20mA Continuous Power Dissipation (T A = +70°C)8-Pin SOT23 (derate 8.75mW/°C above +70°C)........700mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature .....................................................+150°C Lead Temperature (soldering, 10s).................................+300°CMAX6365–MAX6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V CC = +2.4V to +5.5V, V BATT = +3.0V, CE IN = V CC , reset not asserted, T A = -40°C to +85°C. Typical values are at T A = +25°C,M A X 6365–M A X 6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating 4_______________________________________________________________________________________Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)8109121115141316-400-2020406080SUPPLY CURRENTvs. TEMPERATURE (NO LOAD)TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )0.20.60.40.81.01.2BATTERY SUPPLY CURRENT (BACKUP MODE) vs. TEMPERATURETEMPERATURE (°C)B A T T E R Y S U P P L YC U R R E N T (µA )-402040-200608021437658-40-2020406080BATT-TO-OUT ON-RESISTANCEvs. TEMPERATURETEMPERATURE (°C)B A T T -T O -O U T O N -R E S I S T A NC E (Ω)ELECTRICAL CHARACTERISTICS (continued)(V= +2.4V to +5.5V, V = +3.0V, CE IN = V , reset not asserted, T = -40°C to +85°C. Typical values are at T = +25°C,Note 2:V BATT can be 0 anytime, or V CC can go down to 0 if V BATT is active (except at startup).Note 3:RESET is pulled up to OUT. Specifications apply for OUT = V CC or OUT = BATT.Note 4:The chip-enable resistance is tested with V CC = V TH(MAX)and CE IN = V CC / 2.MAX6365–MAX6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating_______________________________________________________________________________________5Typical Operating Characteristics (continued)(T A = +25°C, unless otherwise noted.)00.40.20.80.61.21.01.4-4020-20406080V CC TO OUT ON-RESISTANCEvs. TEMPERATURETEMPERATURE (°C)V C C T O O U T O N -R E S I S T A N C E (Ω)190195205200210RESET TIMEOUT PERIOD vs. TEMPERATUREM A X 6365/8-05TEMPERATURE (°C)R E S E T T I M E O U T P E R I O D (m s )-402040-206080301575604513512010590TEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )-402040-206080V CC TO RESET PROPAGATION DELAYvs. TEMPERATURE2.03.02.55.04.54.03.5RESET THRESHOLD vs. TEMPERATURETEMPERATURE (°C)T H R E S H O L D (V )-402040-206080110010100010,000MAXIMUM TRANSIENT DURATION vs. RESET THRESHOLD OVERDRIVERESET THRESHOLD OVERDRIVE V TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )40030035025020005015010003215498761000.5 1.0 1.5 2.0 2.5 3.03.5BATTERY SUPPLY CURRENT vs. SUPPLY VOLTAGEV CC (V)B A T T E R Y S U P P L YC U R R E N T (µA )M A X 6365–M A X 6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating 6_______________________________________________________________________________________1.2341.2351.236MAX6368RESET IN THRESHOLD vs. TEMPERATUREM A X 6365/8 -10TEMPERATURE (°C)V R T H (V )-402040-2060801.01.91.61.32.82.52.2MAX6368RESET IN TO RESET PROPAGATION DELAYvs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )-402040-206080013245C LOAD (pF)P R O P A G A T I O N D E L A Y (n s )10050150200CHIP-ENABLE PROPAGATION DELAY vs. CE OUT LOAD CAPACITANCE515102025-40-2020406080TEMPERATURE (°C)C E I N T O C E O U T O N -R E S I S T A N C E (Ω)CE IN TO CE OUT ON-RESISTANCEvs. TEMPERATURE1.01.31.21.11.51.41.91.81.71.62.0-40-2020406080TEMPERATURE (°C)W A T C H D O G T I M E O U T P E R I O D (s )MAX6366WATCHDOG TIMEOUT PERIODvs. TEMPERATURETypical Operating Characteristics (continued)(T A = +25°C, unless otherwise noted.)MAX6365–MAX6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating_______________________________________________________________________________________7M A X 6365–M A X 6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating 8_______________________________________________________________________________________Detailed DescriptionThe Typical Operating Circuit shows a typical connec-tion for the MAX6365–MAX6368. OUT powers the static random-access memory (SRAM). If V CC is greater than the reset threshold (V TH ), or if V CC is lower than V TH but higher than V BATT , V CC is connected to OUT. If V CC is lower than V TH and V CC is less than V BATT ,BATT is connected to OUT. OUT supplies up to 150mA from V CC . In battery-backup mode, an internal MOSFET connects the backup battery to OUT. The on-resistance of the MOSFET is a function of backup-battery voltage and is shown in the BATT-to-OUT On-Resistance vs.Temperature graph in the T ypical Operating Char-acteristics .Chip-Enable Signal GatingThe MAX6365–MAX6368 provide internal gating of CE signals to prevent erroneous data from being written toCMOS RAM in the event of a power failure. During nor-mal operation, the CE gate is enabled and passes all CE transitions. When reset asserts, this path becomes disabled, preventing erroneous data from corrupting the CMOS RAM. All of these devices use a series trans-mission gate from CE IN to CE OUT. The 2ns propaga-tion delay from CE IN to CE OUT allows the devices to be used with most µPs and high-speed DSPs.During normal operation, CE IN is connected to CE OUT through a low on-resistance transmission gate.This is valid when reset is not asserted. If CE IN is high when reset is asserted, CE OUT remains high regard-less of any subsequent transitions on CE IN during the reset event.If CE IN is low when reset is asserted, CE OUT is held low for 12µs to allow completion of the read/write oper-ation (F igure 1). After the 12µs delay expires, the CEFunctional DiagramMAX6365–MAX6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating_______________________________________________________________________________________9OUT goes high and stays high regardless of any sub-sequent transitions on CE IN during the reset event.When CE OUT is disconnected from CE IN, CE OUT is actively pulled up to OUT.The propagation delay through the chip-enable circuit-ry depends on both the source impedance of the drive to CE IN and the capacitive loading at CE OUT. The chip-enable propagation delay is production tested from the 50% point of CE IN to the 50% point of CE OUT, using a 50Ωdriver and 50pF load capacitance.Minimize the capacitive load at CE OUT to minimize propagation delay, and use a low-output-impedance driver.Backup-Battery SwitchoverIn a brownout or power failure, it may be necessary to preserve the contents of the RAM. With a backup bat-tery installed at BATT, the MAX6365–MAX6368 auto-matically switch the RAM to backup power when V CC falls. The MAX6367 has a BATT ON output that goes high in battery-backup mode. These devices require two conditions before switching to battery-backup mode:1) V CC must be below the reset threshold.2) V CC must be below V BATT .Table 1 lists the status of the inputs and outputs in bat-tery-backup mode. The devices do not power up if the only voltage source is on BATT. OUT only powers upfrom V CC at startup.Many µP-based products require manual reset capabili-ty, allowing the user or external logic circuitry to initiate a reset. For the MAX6365, a logic low on MR asserts reset.Reset remains asserted while MR is low and for a mini-mum of 150ms (t RP ) after it returns high. MR has an inter-nal 20k Ωpullup resistor to V CC . This input can be driven with TTL/CMOS logic levels or with open-drain/collector outputs. Connect a normally open momentary switch from MR to GND to create a manual reset function; exter-nal debounce circuitry is not required. If MR is driven from long cables or the device is used in a noisy environ-ment, connect a 0.1µF capacitor from MR to GND to pro-vide additional noise immunity.Figure 1. Reset and Chip-Enable TimingM A X 6365–M A X 6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating 10______________________________________________________________________________________Watchdog Input (MAX6366 Only)The watchdog monitors µP activity through the watch-dog input (WDI). If the µP becomes inactive, reset asserts. To use the watchdog function, connect WDI to a bus line or µP I/O line. A change of state (high to low,low to high, or a minimum 100ns pulse) resets the watchdog timer. If WDI remains high or low for longer than the watchdog timeout period (t WD ), the internal watchdog timer runs out and a reset pulse is triggered for the reset timeout period (t RP ). The internal watchdog timer clears whenever reset asserts or whenever WDI sees a rising or falling edge. If WDI remains in either a high or low state, a reset pulse asserts periodically after every t WD (Figure 2).BATT ON Indicator (MAX6367 Only)BATT ON is a push-pull output that drives high when in battery-backup mode. BATT ON typically sinks 3.2mA at 0.1V saturation voltage. In battery-backup mode, this terminal sources approximately 10µA from OUT. Use BATT ON to indicate battery-switchover status or to supply base drive to an external pass transistor for higher current applications (Figure 3).RESET IN Comparator (MAX6368 Only)RESET IN is compared to an internal 1.235V reference.If the voltage at RESET IN is less than 1.235V, reset asserts. Use the RESET IN comparator as an undervolt-age detector to signal a failing power supply or as a secondary power-supply reset monitor.To program the reset threshold (V RTH ) of the secondary power supply, use the following (see Typical Operating Circuit ):V RTH = V REF (R1 / R2 + 1)where V REF = 1.235V. To simplify the resistor selection,choose a value for R2 and calculate R1:R1 = R2 [(V RTH / V REF ) - 1]Since the input current at RESET IN is 25nA (max),large values (up to 1M Ω) can be used for R2 with no significant loss in accuracy. For example, in the Typical Operating Circuit , the MAX6368 monitors two supply voltages. To monitor the secondary 5V logic or analog supply with a 4.60V nominal programmed reset thresh-old, choose R2 = 100k Ω, and calculate R1 = 273k Ω.Reset OutputA µP’s reset input starts the µP in a known state. The MAX6365–MAX6368 µP supervisory circuits assert a reset to prevent code-execution errors during power-up, power-down, and brownout conditions. RESET is guaranteed to be a logic low or logic high, depending on the device chosen (see the Ordering Information ).RESET or RESET asserts when V CC is below the reset threshold and for at least 150ms (t RP ) after V CC rises above the reset threshold. RESET or RESET also asserts when MR is low (MAX6365) and when RESET IN is less than 1.235V (MAX6368). The MAX6366 watch-dog function will cause RESET (or RESET ) to assert in pulses following a watchdog timeout (Figure 2).Applications InformationOperation Withouta Backup Power SourceThe MAX6365–MAX6368 provide battery-backup func-tions. If a backup power source is not used, connect BATT to GND and OUT to V CC .Watchdog Software ConsiderationsOne way to help the watchdog timer monitor the soft-ware execution more closely is to set and reset the watchdog at different points in the program rather than pulsing the watchdog input periodically. F igure 4shows a flow diagram in which the I/O driving theFigure 2. MAX6366 Watchdog Timeout Period and Reset Active TimeMAX6365–MAX6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating______________________________________________________________________________________11watchdog is set low in the beginning of the program,set high at the beginning of every subroutine or loop,and set low again when the program returns to the beginning. If the program should hang in any subrou-tine, the problem would be quickly corrected.Replacing the Backup BatteryWhen V CC is above V TH , the backup power source can be removed without danger of triggering a reset pulse.The device does not enter battery-backup mode when V CC stays above the reset threshold voltage.Negative-Going V CC TransientsThese supervisors are relatively immune to short-dura-tion, negative-going V CC transients. Resetting the µP when V CC experiences only small glitches is usually not desirable.The T ypical Operating Characteristics section has a Maximum Transient Duration vs. Reset Threshold Overdrive graph for which reset is not asserted. The graph was produced using negative-going V CC pulses,starting at V CC and ending below the reset threshold by the magnitude indicated (reset threshold overdrive).The graph shows the maximum pulse width that a neg-ative-going V CC transient can typically have without triggering a reset pulse. As the amplitude of the tran-sient increases (i.e., goes further below the reset threshold), the maximum allowable pulse width decreases. Typically, a V CC transient that goes 100mV below the reset threshold and lasts for 30µs will not trig-ger a reset pulse.A 0.1µF bypass capacitor mounted close to the V CC pin provides additional transient immunity.M A X 6365–M A X 6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating 12______________________________________________________________________________________standard versions only. Contact factory for availability of nonstandard versions.MAX6365–MAX6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating______________________________________________________________________________________13Pin Configurations (continued)M A X 6365–M A X 6368SOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable Gating 14______________________________________________________________________________________Typical Operating CircuitChip InformationTRANSISTOR COUNT: 729PROCESS: CMOSSOT23, Low-Power µP Supervisory Circuits with Battery Backup and Chip-Enable GatingMAX6365–MAX6368Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________15©2005 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products, Inc.Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)。
MAX6675的温度测控系统报告
MAX6675的温度测控系统报告目录目录 (2)1、设计方案: (3)2、传感器的选择: (3)3、系统设计........................... 错误!未定义书签。
4、硬件介绍........................... 错误!未定义书签。
4.1、K型热电偶............ 错误!未定义书签。
4.1.1 K型热电偶概况错误!未定义书签。
4.1.2 热电偶传感器测温原理错误!未定义书签。
4.2、MAX6675 (6)4.2.1 MAX6675概况 (6)4.2.2 MAX6675性能及结构 (7)4.2.3 MAX6675的工作原理与功能 (8)4.3、89C51单片机 (11)4.4、4位共阳极LED (13)5、硬件电路 (14)5.1、K型热电偶采集信号电路 (14)5.2、放大电路 (15)5.3、电压跟随器 (16)5.4、A/D转换电路 (16)6、整体电路设计 (17)7、软件设计： (18)8、仿真结果 (22)9、总结体会 (24)1、设计方案:温度测量系统使用温度传感器检测温度变化,补偿电路减小误差提高准确性,将温度变化转化为电压或电流信号,经过放大器将信号放大后,再用A/D转换器将模拟信号转化为数字信号,并将数字信号送到51单片机进行处理,最后在数码管上显示被测温度值。
2、传感器的选择:温度传感器从使用的角度大致可分为接触式和非接触式两大类，前者是让温度传感器直接与待测物体接触，而后者是使温度传感器与待测物体离开一定的距离，检测从待测物体放射出的红外线，达到测温的目的。
在接触式和非接触式两大类温度传感器中，相比运用多的是接触式传感器，非接触式传感器一般在比较特殊的场合才使用，目前得到广泛使用的接触式温度传感器主要有热电式传感器，其中将温度变化转换为电阻变化的称为热电阻传感器，将温度变化转换为热电势变化的称为热电偶传感器。
热电阻传感器可分为金属热电阻式和半导体热电阻式两大类，前者简称热电阻，后者简称热敏电阻。
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General DescriptionThe MAX6375–MAX6380 are ultra-low-power circuits used for monitoring battery, power-supply, and regulat-ed system voltages. Each detector contains a precision bandgap reference, comparator, and internally trimmed resistors that set specified trip threshold voltages.These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring nominal system voltages from 2.5V to 5V.These circuits perform a single function: they assert an output signal whenever the V CC supply voltage falls below a preset threshold. The devices are differentiated by their output logic configurations and preset thresh-old voltages. The MAX6375/MAX6378 (push-pull) and MAX6377/MAX6380 (open-drain) have an active-low output (OUT is logic low when V CC is below V TH ). The MAX6376/MAX6379 have an active-high push-pull out-put (OUT is logic high when V CC is below V TH ). All parts are guaranteed to be in the correct output logic state for V CC down to 1V. The detector is designed to ignore fast transients on V CC . The MAX6375/MAX6376/MAX6377 have voltage thresholds between 2.20V and 3.08V in approximately 100mV increments. The MAX6378/MAX6379/MAX6380 have voltage thresholds between 3.30V and 4.63V in approximately 100mV increments.Ultra-low supply current of 500nA (MAX6375/MAX6376/MAX6377) makes these parts ideal for use in portable equipment. All six devices are available in a space-sav-ing SC70 package or in a tiny SOT23 package.ApplicationsPrecision Battery Monitoring Load Switching/Power SequencingPower-Supply Monitoring in Digital/Analog Systems Portable/Battery-Powered EquipmentFeatures♦Ultra-Low 500nA Supply Current (MAX6375/MAX6376/MAX6377)♦Thresholds Available from 2.20V to 4.63V in Approximately 100mV Increments♦±2.5% Threshold Accuracy Over Temperature ♦Low Cost♦Available in Three Versions: Push-Pull OUT ,Push-Pull OUT, and Open-Drain OUT ♦Power-Supply Transient Immunity ♦No External Components♦Available in Either a 3-Pin SC70 or 3-Pin SOT23 PackageMAX6375–MAX63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors________________________________________________________________Maxim Integrated Products 1Pin Configuration19-1721; Rev 3; 12/05*The MAX6375/MAX6376/MAX6377 are available in factory-presetthresholds from 2.20V to 3.08V, in approximately 0.1V increments.The MAX6378/MAX6379/MAX6380 are available in factory-preset thresholds from 3.30V to 4.63V, in approximately 0.1V increments.Choose the desired threshold suffix from Table 1 and insert it in the blank spaces following R. There are 21 standard versions,with a required order increment of 2500 pieces. Sample stock is generally held on the standard versions only (see the Selector Guide). The required order increment is 10,000 pieces for non-standard versions (Table 2). Contact factory for availability. All devices available in tape-and-reel only.Devices are available in both leaded and lead-free packaging.Specify lead-free by replacing “-T” with “+T” when ordering.Selector Guide appears at end of data sheet.For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering information continued at end of data sheetM A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(V CC = full range, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C and V CC = 3V.) (Note 1)Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Terminal Voltage (with respect to GND)V CC ...........................................................................-0.3V to +6V OUT, OUT (push-pull)................................-0.3V to (V CC + 0.3V)OUT (open-drain).....................................................-0.3V to +6V Input Current (V CC ).............................................................20mA Output Current (OUT, OUT )................................................20mAContinuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.17mW/°C above +70°C)...........174mW 3-Pin SOT23 (derate 4mW/°C above +70°C)..............320mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°CNote 1:Production tested at +25°C only. Overtemperature limits are guaranteed by design, not production tested.MAX6375–MAX63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors__________________________________________Typical Operating Characteristics(V CC = 5V, T A = +25°C, unless otherwise noted.)00.30.20.10.40.50.60.70.80.91.0-40-2020406080SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )050100150200-40-2020406080PROPAGATION DELAY (FALLING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )040208060120100140-4020-20406080PROPAGATION DELAY (RISING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )50011001000MAXIMUM TRANSIENT DURATION vs. THRESHOLD OVERDRIVE100300400200THRESHOLD OVERDRIVEV TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )10Pin DescriptionM A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors____________Applications InformationInterfacing to Different Logic Voltage ComponentsThe MAX6377/MAX6380 have an active-low, open-drain output. This output structure sinks current when OUT is asserted. Connect a pullup resistor from OUT to any supply voltage up to 5.50V (Figure 1). Select a resistor value large enough to allow a valid logic low (see Electrical Characteristics ), and small enough to register a logic high while supplying all input current and leakage paths connected to the OUT line.Negative-Going V CC TransientsThese devices are relatively immune to short-duration,negative-going V CC transients (glitches). The Typical Operating Characteristics show the Maximum Transient Duration vs. Threshold Overdrive graph, for which out-put pulses are not generated. The graph shows the maximum pulse width that a negative-going V CC tran-sient may typically have before the devices issue out-put signals. As the amplitude of the transient increases,the maximum-allowable pulse width decreases.Figure 1. Interfacing to Different Logic Voltage ComponentsTable 1. Factory-Trimmed Reset Thresholds ‡3-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors_______________________________________________________________________________________5Table 2. Device Marking Codes and Minimum Order IncrementsMAX6375–MAX6380M A X 6375–M A X 63803-Pin, Ultra-Low-Power SC70/SOT23Voltage Detectors 6__________________________________________________________________________________________________________Chip InformationTRANSISTOR COUNT: 419Selector Guide**Sample stock is generally held on all standard versions.Contact factory for availability of nonstandard versions.*The MAX6375/MAX6376/MAX6377 are available in factory-presetthresholds from 2.20V to 3.08V, in approximately 0.1V increments.The MAX6378/MAX6379/MAX6380 are available in factory-preset thresholds from 3.30V to 4.63V, in approximately 0.1V increments.Choose the desired threshold suffix from Table 1 and insert it in the blank spaces following R. There are 21 standard versions,with a required order increment of 2500 pieces. Sample stock is generally held on the standard versions only (see the Selector Guide). The required order increment is 10,000 pieces for non-standard versions (Table 2). Contact factory for availability. All devices available in tape-and-reel only.Devices are available in both leaded and lead-free packaging.Specify lead-free by replacing “-T” with “+T” when ordering.Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________7©2005 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products, Inc.3-Pin, Ultra-Low-Power SC70/SOT23Voltage DetectorsMAX6375–MAX6380Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。