MAX6138CEXR21中文资料
贴片A系列三极管参数
Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Max Sie Phi Phi Zet Sie Phi Phi Max Max Max Max Max Max Max Max Max Max
B B I S B B C C C C C C C I I B N N N N N N N N N N N B D D D D D D RQ BQ I C M N N N N N N
SOT363 SOD323 SOT143 SOT143 SOT143 SOT23 SOT23 SOT323 SOT23 SC74 SOT323 SOT23 SOT23 SOT416 SOD110 SOD323 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT323 SC75 SC74 SOT323 SOT23 SOT143 SOT143 SOD323 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23 SOT23
Code A A A A0 A0 A03 A06 A07 A1 A1 A1 A1 A1p A1t A1t A1s A1s A1s A1X A2 A2 A2 A2s A2 A2 A2 A22 A2X A3 A3 A3 A3 A3 A3p A3t A3 A3X A4 A4s A4s A4s A4s A4 A4p A4t
A4t A4X A5 A5p A5t A5 A5 A5 A6s A6s A6s A6 A6p A6t A6 A6 A6p A6 A6A A6B A6C A6D A6E A6F A6G A6H A6J A6K A6L A6X A7s A7s A7s A7s A7 A7 A7 A8 A8 A8 A8 A8A A8B A8C A8D A8E A8F
MAX6163AESA-T中文资料
General DescriptionThe MAX6161–MAX6168 are precision, low-dropout,micropower voltage references. These three-terminal devices operate with an input voltage range from (V OUT + 200mV) to 12.6V and are available with output volt-age options of 1.25V, 1.8V, 2.048V, 2.5V, 3V, 4.096V,4.5V, and 5V. They feature a proprietary curvature-cor-rection circuit and laser-trimmed thin-film resistors that result in a very low temperature coefficient of 5ppm/°C (max) and an initial accuracy of ±2mV (max).Specifications apply to the extended temperature range (-40°C to +85°C).The MAX6161–MAX6168 typically draw only 100µA of supply current and can source 5mA (4mA for MAX6161) or sink 2mA of load current. Unlike conven-tional shunt-mode (two-terminal) references that waste supply current and require an external resistor, these devices offer a supply current that is virtually indepen-dent of the supply voltage (8µA/V variation) and do not require an external resistor. Additionally, the internally compensated devices do not require an external com-pensation capacitor. Eliminating the external compen-sation capacitor saves valuable board area in space-critical applications. A low-dropout voltage and a supply-independent, ultra-low supply current make these devices ideal for battery-operated, high-perfor-mance, low-voltage systems.The MAX6161–MAX6168 are available in 8-pin SO packages.________________________ApplicationsAnalog-to-Digital Converters (ADCs)Portable Battery-Powered Systems Notebook Computers PDAs, GPS, DMMs Cellular PhonesPrecision +3V/+5V Systems____________________________Features♦±2mV (max) Initial Accuracy♦5ppm/°C (max) Temperature Coefficient ♦5mA Source Current at 0.9mV/mA ♦2mA Sink Current at 2.5mV/mA ♦Stable with 1µF Capacitive Loads ♦No External Capacitor Required ♦100µA (typ) Quiescent Supply Current ♦200mV (max) Dropout at 1mA Load Current ♦Output Voltage Options: 1.25V, 1.8V, 2.048V, 2.5V,3V, 4.096V, 4.5V, 5V19-1650; Rev 3; 8/05MAX6161–MAX6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References________________________________________________________________Maxim Integrated Products 1___________________Pin Configuration*Insert the code for the desired initial accuracy and temperature coefficient (from the Selector Guide) in the blank to complete the part number.Typical Operating Circuit and Selector Guide appear at end of data sheet.Ordering InformationFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 6161–M A X 6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSStresses 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 GNDIN …………............................................................-0.3 to +13.5V OUT………………........................................-0.3V to (V IN + 0.3V)Output Short-Circuit Duration to GND or IN (V IN ≤6V)...Continuous Output Short-Circuit Duration to GND or IN (V IN > 6V)…...........60sContinuous Power Dissipation (T A = +70°C)8-Pin SO (derate 5.88mW/°C above +70°C)...............471mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range………….…………-65°C to +150°C Lead Temperature (soldering, 10s)……………………….+300°CELECTRICAL CHARACTERISTICS—MAX6161 (V OUT = 1.25V)MAX6161–MAX6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS—MAX6168 (V OUT = 1.800V)M A X 6161–M A X 6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX6162 (V OUT = 2.048V)MAX6161–MAX6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References_______________________________________________________________________________________5ELECTRICAL CHARACTERISTICS—MAX6166 (V OUT = 2.500V)M A X 6161–M A X 6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS —MAX6163 (V OUT = 3.000V)MAX6161–MAX6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References_______________________________________________________________________________________7ELECTRICAL CHARACTERISTICS—MAX6164 (V OUT = 4.096V)M A X 6161–M A X 6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References 8_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS —MAX6167 (V OUT = 4.500V)MAX6161–MAX6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References_______________________________________________________________________________________9ELECTRICAL CHARACTERISTICS—MAX6165 (V OUT = 5.000V)Note 2:Temperature Coefficient is specified by the “box” method; i.e., the maximum ΔV OUT is divided by the maximum ΔT.Note 3:Thermal Hysteresis is defined as the change in T A = +25°C output voltage before and after temperature cycling of thedevice (from T A = T MIN to T MAX ). Initial measurement at T A = +25°C is followed by temperature cycling the device to T A = +85°C then to T A = -40°C, and another measurement at T A = +25°C is compared to the original measurement at T A = +25°C.Note 4: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 forMAX6165).M A X 6161–M A X 6168Precision, Micropower, Low-Dropout, High-Output-Current, SO-8 Voltage References 10______________________________________________________________________________________Typical Operating Characteristics(V IN = +5V for MAX6161–MAX6168, V IN = +5.5V for MAX6165, I OUT = 0, T A = +25°C, unless otherwise noted.) (Note 5)MAX6161OUTPUT VOLTAGE TEMPERATURE DRIFTTEMPERATURE (°C)O U T P U T V O L T A G E (V )70552540-1010-251.24961.24971.24981.24991.25001.25011.25021.25031.25041.25051.2495-4085MAX6165OUTPUT VOLTAGE TEMPERATURE DRIFTTEMPERATURE (°C)O U T P U T V O L T A G E (V )7055-25-102510404.99854.99904.99955.00005.00055.00105.00155.00204.9980-4085MAX6161LONG-TERM DRIFTM A X 6161/68 t o c 03TIME (hrs)D R I F T (p p m )768192384576-30-20-100102030405060-40960MAX6165LONG-TERM DRIFTM A X 6161/68 t o c 04TIME (hrs)D R I F T (p p m )768192384576-90-80-70-60-50-40-30-20-100-100960-300-200-100010020030024681012MAX6161LINE REGULATIONINPUT VOLTAGE (V)O U T P U T V O L T A G E C H A N G E (μV )-1200-600-800-1000-400-20002005971113MAX6165LINE REGULATIONINPUT VOLTAGE (V)O U T P U T V O L T A G E C H A N G E (μV )-310-1-22345-4-224LOAD CURRENT (mA)O U T P U T V O L T A G E C H A N G E (m V)MAX6161LOAD REGULATION-620-2-44861012-6-2-4246LOAD CURRENT (mA)O U T P U T V O L T A G E C H A N G E (m V )MAX6165LOAD REGULATION0.100.050.200.150.250.30021345MAX6166DROPOUT VOLTAGE vs. LOAD CURRENTLOAD CURRENT (mA)D R O P O U T V O L T A GE (V )MAX6161–MAX6168Output-Current, SO-8 Voltage References______________________________________________________________________________________11Typical Operating Characteristics (continued)(V IN = +5V for MAX6161–MAX6168, V IN = +5.5V for MAX6165, I OUT = 0, T A = +25°C, unless otherwise noted.) (Note 5)00.050.150.100.200.2521345LOAD CURRENT (mA)D R O P O U T V O L T A GE (V )MAX6165DROPOUT VOLTAGE vs. LOAD CURRENTM A X 6161/68 t o c 11FREQUENCY (kHz)P S R R (d B )0-10-20-30-40-50-60-70-80-900.0011101000.010.11000MAX6161POWER-SUPPLY REJECTION RATIOvs. FREQUENCY-70-800.001101000-60-50-40-30-20-100FREQUENCY (kHz)P S R R (d B )0.1MAX6165POWER-SUPPLY REJECTION RATIOvs. FREQUENCYM A X 6161/68 t c 12MAX6161SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (μA )1210864108116124132140148156164172180100214MAX6165SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (μA )1312101178969610210811412012613213814415090514MAX6161SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (μA )603510-15108116124132140148156164172180100-4085MAX6165SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (μA )603510-159610210811412012613213814415090-408500.00110100040206080100140120160180200220M A X 6161/68 t o c 17FREQUENCY (kHz)O U T P U T I M P E D A N C E (Ω)0.1MAX6161OUTPUT IMPEDANCE vs. FREQUENCY1800.00110100040206010080120140160M A X 6161/68 t o c 18FREQUENCY (kHz)O U T P U T I M P E D A N C E (Ω)0.1MAX6165OUTPUT IMPEDANCE vs. FREQUENCYM A X 6161–M A X 6168Output-Current, SO-8 Voltage References 12______________________________________________________________________________________Typical Operating Characteristics (continued)(V IN = +5V for MAX6161–MAX6168, V IN = +5.5V for MAX6165, I OUT = 0, T A = +25°C, unless otherwise noted.) (Note 5)V OUT 10μV/div 1s/div MAX61610.1Hz TO 10Hz OUTPUT NOISEM A X 6161/68 t o c 19V OUT 10μV/div1s/divMAX6165NOISEM A X 6161/68 t o c 20V OUT 500mV/divV IN 5V/div10μs/divMAX6161TURN-ON TRANSIENT(C L = 50pF)M A X 6161/68 t o c 21V OUT 2V/divV IN 5V/div40μs/divMAX6165TURN-ON TRANSIENT(C L = 50pF)M A X 6161/67 t o c 22I OUT 500μA/divV OUTAC-COUPLED 100mV/div400μs/div MAX6161LOAD TRANSIENT(I OUT = ±250μA, V IN = 5.0, C L = 0)+250μA -250μAMAX6161/68 toc23I OUT 500μA/divV OUTAC-COUPLED50mV/div400μs/divMAX6165LOAD TRANSIENT(I OUT = ±250μA, C L = 0, V IN = 5.5V)+250μA -250μAMAX6161/68 toc24MAX6161–MAX6168Output-Current, SO-8 Voltage References______________________________________________________________________________________13I OUT 5mA/divV OUTAC-COUPLED50mV/div400μs/divMAX6165LOAD TRANSIENT(C L = 0, I OUT = ±2mA, V IN = 5.5V)+2mA -2mAMAX6161/68 toc28I OUT 5mA/divV OUTAC-COUPLED 100mV/div 400μs/div MAX6161LOAD TRANSIENT(V IN = 5.0V, C L = 0, I OUT = ±2mA)+2mA-2mAMAX6161/68 toc27I OUT 5mA/divV OUTAC-COUPLED50mV/div400μs/divMAX6161LOAD TRANSIENT(V IN = 5.0V, C L = 1μF, I OUT = ±2mA)+2mA-2mAMAX6161/68 toc29I OUT 5mA/divV OUTAC-COUPLED20mV/div400μs/divMAX6165LOAD TRANSIENT(C L = 1μF, I OUT = ±2mA, V IN = 5.5V)+2mA-2mAMAX6161/68 toc30I OUT 500μA/divV OUTAC-COUPLED10mV/div 400μs/div MAX6161LOAD TRANSIENT(I OUT = ±250μA, V IN = 5.0V, C L = 1μF)+250μA -250μAMAX6161/68 toc25I OUT 500μA/divV OUTAC-COUPLED20mV/div400μs/divMAX6165LOAD TRANSIENT(I OUT = ±250μA, C L = 1μF, V IN = 5.5V)+250μA-250μAMAX6161/68 toc26Typical Operating Characteristics (continued)(V IN = +5V for MAX6161–MAX6168, V IN = +5.5V for MAX6165, I OUT = 0, T A = +25°C, unless otherwise noted.) (Note 5)M A X 6161–M A X 6168Output-Current, SO-8 Voltage References 14______________________________________________________________________________________I OUT 5mA/divV OUTAC-COUPLED50mV/div 400μs/div MAX6161LOAD TRANSIENT(V IN = 5.0V, C L = 1μF, I OUT = ±4mA)+4mA-4mAMAX6161/68 toc33I OUT 5mA/divV OUTAC-COUPLED50mV/div400μs/divMAX6165LOAD TRANSIENT(I OUT = ±5mA, C L = 1μF, V IN = 5.5V)+5mA-5mAMAX6161/68 toc34V IN500mV/divV OUTAC-COUPLED20mV/div 40μs/div MAX6161LINE TRANSIENT(C L = 0)+0.25V-0.25VMAX6161/68 toc35V IN500mV/divV OUTAC-COUPLED20mV/div40μs/divMAX6165LINE TRANSIENT(C L = 0)+0.25V -0.25VMAX6161/68 toc36Note 5:Many of the Typical Operating Characteristics of the MAX6161 family are extremely similar. The extremes of these characteristicsare found in the MAX6161 (1.25V output) and the MAX6165 (5.0V output). The Typical Operating Characteristics of the remain-der of the MAX6161 family typically lie between these two extremes and can be estimated based on their output voltages.Typical Operating Characteristics (continued)(V IN = +5V for MAX6161–MAX6168, V IN = +5.5V for MAX6165, I OUT = 0, T A = +25°C, unless otherwise noted.) (Note 5)I OUT 5mA/divV OUTAC-COUPLED 200mV/div400μs/div MAX6161LOAD TRANSIENT(V IN = 5.0V, C L = 0, I OUT = ±4mA)+4mA-4mAMAX6161/68 toc31I OUT 5mA/divV OUTAC-COUPLED 100mV/div400μs/divMAX6165LOAD TRANSIENT(I OUT = ±5mA, C L = 0, V IN = 5.5V)+5mA-5mAMAX6161/68 toc32MAX6161–MAX6168Output-Current, SO-8 Voltage References______________________________________________________________________________________15Applications InformationInput BypassingF or the best line-transient performance, decouple the input with a 0.1µF ceramic capacitor as shown in the Typical Operating Circuit . Locate the capacitor as close to IN as possible. When transient performance is less important, no capacitor is necessary.Output/Load CapacitanceDevices in the MAX6161 family do not require an output capacitor for frequency stability. In applications where the load or the supply can experience step changes,an output capacitor of at least 0.1µF will reduce the amount of overshoot (undershoot) and improve the cir-cuit’s transient response. Many applications do not require an external capacitor, and the MAX6161 family can offer a significant advantage in applications when board space is critical.Supply CurrentThe quiescent supply current of the series-mode MAX6161 family is typically 100µA and is virtually inde-pendent of the supply voltage, with only an 8µA/V (max) variation with supply voltage. Unlike series refer-ences, shunt-mode references operate with a series resistor connected 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 cur-rent, even if the load current is not present at the time.In the MAX6161 family, 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 efficiency reduces power dissi-pation and extends battery life.When the supply voltage is below the minimum speci-fied input voltage (as during turn-on), the devices can draw up to 400µA 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 input voltage at T A = +25°C before and after the device is cycled over its entire operating temperature range.Hysteresis is caused by differential package stress appearing across the bandgap core transistors. The typical temperature hysteresis value is 125ppm.Turn-On TimeThese devices typically turn on and settle to within 0.1% of their final value in 50µs to 300µs, depending on the output voltage (see electrical table of part used).The turn-on time can increase up to 1.5ms with the device operating at the minimum dropout voltage and the maximum load.Typical Operating Circuit__________________________Chip Information TRANSISTOR COUNT: 117PROCESS: BiCMOSPin DescriptionPIN NAME FUNCTIONNo Connection. Not internally connected.N.C.1, 3, 5, 7, 82IN Input Voltage GroundGND 46OUTReference OutputM A X 6161–M A X 6168Output-Current, SO-8 Voltage References 16______________________________________________________________________________________Selector GuideMAX6161–MAX6168Maxim 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.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________17©2005 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products, Inc.S O I C N .E P SOutput-Current, SO-8 Voltage ReferencesPackage 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 .)。
BA6138中文资料
827
元器件交易网 Audio ICs
FExplanation of application circuit example The application circuit shown in Fig. 2 is for the BA6138. The audio signal is compressed to its square root and generated to R3 and R4 as a DC output. By introducing the output voltage of R3 and R4 into the input of a linear level meter IC (12 to 16 points, LED or fluorescent drive level meter IC), a high precision level meter can be created. The relation between the input voltage and output voltage of the application example of Fig. 2 is shown in Fig. 3.
If this pin is not used, open-circuit or ground it. A negative voltage of up to *10V can also be applied to this pin. R3, R4 These form the load resistance of the BA6138. By making this resistance extremely low, the recovery time will shorten, however, dispersion will increase. In the application example, the resistance can go to about 3.3kΩ. If the recovery time has been fixed, R1 = R2 can be decreased and C3 = C4 can be increased to lower the load resistance.
MAX213CAI-T中文资料
General DescriptionThe MAX200–MAX211/MAX213 transceivers are designed for RS-232 and V.28 communication inter-faces where ±12V supplies are not available. On-board charge pumps convert the +5V input to the ±10V need-ed for RS-232 output levels. The MAX201 and MAX209operate from +5V and +12V, and contain a +12V to -12V charge-pump voltage converter.The MAX200–MAX211/MAX213 drivers and receivers meet all EIA/TIA-232E and CCITT V.28 specifications at a data rate of 20kbps. The drivers maintain the ±5V EIA/TIA-232E output signal levels at data rates in excess of 120kbps when loaded in accordance with the EIA/TIA-232E specification.The 5µW shutdown mode of the MAX200, MAX205,MAX206, and MAX211 conserves energy in battery-powered systems. The MAX213 has an active-low shut-down and an active-high receiver enable control. Two receivers of the MAX213 are active, allowing ring indica-tor (RI) to be monitored easily using only 75µW power.The MAX211 and MAX213 are available in a 28-pin wide small-outline (SO) package and a 28-pin shrink small-outline (SSOP) package, which occupies only 40% of the area of the SO. The MAX207 is now avail-able in a 24-pin SO package and a 24-pin SSOP. The MAX203 and MAX205 use no external components,and are recommended for applications with limited circuit board space.ApplicationsComputersLaptops, Palmtops, Notebooks Battery-Powered Equipment Hand-Held Equipment Next-Generation Device Features ♦For Low-Cost Applications:MAX221E: ±15kV ESD-Protected, +5V, 1µA, Single RS-232 Transceiver with AutoShutdown™♦For Low-Voltage and Space-Constrained Applications:MAX3222E/MAX3232E/MAX3237E/MAX3241E/MAX3246E: ±15kV ESD-Protected, Down to 10nA,+3.0V to +5.5V, Up to 1Mbps, True RS-232Transceivers (MAX3246E Available in UCSP™Package)♦For Space-Constrained Applications:MAX3228E/MAX3229E: ±15kV ESD-Protected,+2.5V to +5.5V, RS-232 Transceivers in UCSP ♦For Low-Voltage or Data Cable Applications:MAX3380E/MAX3381E: +2.35V TO +5.5V, 1µA,2Tx/2Rx RS-232 Transceivers with ±15kV ESD-Protected I/O and Logic Pins ♦For Low-Power Applications:MAX3224E–MAX3227E/MAX3244E/MAX3245E:±15kV ESD-Protected, 1µA, 1Mbps, +3.0V to+5.5V, RS-232 Transceivers with AutoShutdown Plus™MAX200–MAX211/MAX213+5V , RS-232 Transceivers with 0.1µF External Capacitors ________________________________________________________________Maxim Integrated Products 119-0065; Rev 6; 10/03For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering Information appears at end of data sheetAutoShutdown, AutoShutdown Plus, and UCSP are trademarks of Maxim Integrated Products, Inc.MAX200–MAX211/MAX213+5V , RS-232 Transceiverswith 0.1µF External Capacitors______________________________________________________________________________________19Ordering Information*Contact factory for dice specifications.M A X 200–M A X 211/M A X 213+5V , RS-232 Transceiverswith 0.1µF External Capacitors 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.20____________________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.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 .)。
MAX3218EAP+中文资料
_______________General DescriptionThe MAX3218 RS-232 transceiver is intended for bat-tery-powered EIA/TIA-232E and V.28/V.24 communica-tions interfaces that need two drivers and two receivers with minimum power consumption from a single low-voltage supply. It provides a wide +1.8V to +4.25V operating voltage range while maintaining true RS-232and EIA/TIA-562 voltage levels. The MAX3218 runs from two alkaline, NiCd, or NiMH cells without any form of voltage regulator. A guaranteed 120kbps data rate provides compatibility with popular software for com-municating with personal computers.Supply current is reduced to 1µA with Maxim’s new AutoShutdown™ feature. When the MAX3218 does not sense a valid signal level on the receiver inputs, the on-board power-supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off.The system turns on again when a valid level is applied to either RS-232 receiver input. As a result, the system saves power without changes to the existing software.Additionally, the MAX3218 can be forced into or out of shutdown, under logic control.While shut down, all receivers can remain active or can be disabled under logic control, permitting a system incorporating the CMOS MAX3218 to monitor external devices while in low-power shutdown. Three-state dri-vers are provided on both receiver outputs so that multi-ple receivers, generally of different interface standards,can be on the same bus. The MAX3218 is available in 20-pin DIP and SSOP packages.________________________ApplicationsBattery-Powered Equipment Subnotebook Computers PDAsHand-Held Equipment Peripherals Cellular Phones____________________________FeaturesBETTER THAN BIPOLAR!o 1µA Supply Current Using AutoShutdown™o Operates Directly from Two Alkaline, NiCd or NiMH Cells o +1.8V to +4.25V Single-Supply Voltage Range o 120kbps Data Rate Guaranteed o Low-Cost Surface-Mount Components o Meets EIA/TIA-232E Specifications o Three-State Receiver Outputs o Flow-Through Pinout o On-Board DC-DC Converters o 20-Pin SSOP and DIP Packages______________Ordering Information†Contact factory for dice specifications.MAX3218*1µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™________________________________________________________________Maxim Integrated Products1Call toll free 1-800-998-8800 for free samples or literature.19-0380; Rev 0; 3/95* Patent Pending™ AutoShutdown is a trademark of Maxim Integrated Products.__________________Pin ConfigurationM A X 32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS(Circuit of Figure 1, V CC = 1.8V to 4.25V, C1 = 0.47µF, C2 = C3 = C4 = 1µF, L1 = 15µH, T A = T MIN to T MAX , unless otherwise noted.Typical values are at V CC = 3.0V, T A = +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.Supply VoltagesV CC ....................................................................-0.3V to +4.6V V+..........................................................(V CC - 0.3V) to +7.5V V-.......................................................................+0.3V to -7.4V V CC to V-..........................................................................+12V LX ................................................................-0.3V to (1V + V+)Input VoltagesT_IN, FORCEON, FORCEOFF ............................-0.3V to +7V R_IN.................................................................................±25V Output VoltagesT_OUT.............................................................................±15V)R_OUT....................................................-0.3V to (V CC + 0.3V)Short-Circuit Duration, R_OUT, T_OUT to GND .......Continuous Continuous Power Dissipation (T A = +70°C)Plastic DIP (derate 11.11mW/°C above +70°C)..........889mW SSOP (derate 8.00mW/°C above +70°C)..................640mW Operating Temperature RangesMAX3218C_ P...................................................0°C to +70°C MAX3218E_ P.................................................-40°C to +85°C Storage Temperature Range ...........................-65°C to +150°C Lead Temperature (soldering, 10sec) ...........................+300°CMAX32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(Circuit of Figure 1, V CC = 1.8V to 4.25V, C1 = 0.47µF, C2 = C3 = C4 = 1µF, L1 = 15µH, T A = T MIN to T MAX , unless otherwise noted.Typical values are at V CC = 3.0V, T A = +25°C.)TIMING CHARACTERISTICS(Circuit of Figure 1, V CC = 1.8V to 4.25V, C1 = 0.47µF, C2 = C3 = C4 = 1µF, L1 = 15µH, T A = T MIN to T MAX , unless otherwise noted.Typical values are at V CC = 3.0V, T A = +25°C.)M A X 32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™4_______________________________________________________________________________________8-8TRANSMITTER OUTPUT VOLTAGE vs. LOAD CAPACITANCE AT 120kbpsLOAD CAPACITANCE (pF)T R A N S M I T T E R O U T P U T V O L T A G E (V )30000-2-6-41000200050006424000120SLEW RATE vs.TRANSMITTER CAPACITANCELOAD CAPACITANCE (pF)S L E W R A T E (V /µs )300042010002000500010864000__________________________________________Typical Operating Characteristics(Circuit of Figure 1, V CC = 1.8V, all transmitter outputs loaded with 3k Ω, T A = +25°C, unless otherwise noted.)12014001.8SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (m A )3.6604020 2.43.0801004.210020TRANSMITTING SUPPLY CURRENTvs. LOAD CAPACITANCELOAD CAPACITANCE (pF)S U P P L Y C U R R E N T (m A )3000605030401000200050009080704000V OHFORCEON, FORCEOFF T_OUT2V/divV OLTIME TO EXIT SHUTDOWN (ONE TRANSMITTER HIGH, ONE TRANSMITTER LOW)100µs/divV CC = 1.8VR L = 3k Ω || 2500pF_______________Detailed DescriptionThe MAX3218 line driver/receiver is intended for bat-tery-powered EIA/TIA-232 and V.28/V.24 communica-tions interfaces that require two drivers and two receivers. The operating voltage extends from 1.8V to 4.25V, yet the device maintains true RS-232 and EIA/TIA-562 transmitter output voltage levels. This wide supply voltage range permits direct operation from a variety of batteries without the need for a voltage regu-lator. For example, the MAX3218 can be run directly from a single lithium cell or a pair of alkaline cells. It can also be run directly from two NiCd or NiMH cells from full-charge voltage down to the normal 0.9V/cell end-of-life point. The 4.25V maximum supply voltage allows the two rechargeable cells to be trickle- or fast-charged while driving the MAX3218.The circuit comprises three sections: power supply,transmitters, and receivers. The power-supply section converts the supplied input voltage to 6.5V, providing the voltages necessary for the drivers to meet true RS-232levels. External components are small and inexpensive.The transmitters and receivers are guaranteed to oper-ate at 120kbps data rates, providing compatibility with LapLink™ and other high-speed communications soft-ware.The MAX3218 is equipped with Maxim’s new propri-etary AutoShutdown™ circuitry. This achieves a 1µA supply current by shutting down the device when the RS-232 cable is disconnected or when the connected peripheral transmitters are turned off. While shut down,both receivers can remain active or can be disabled under logic control. With this feature, the MAX3218 can be in low-power shutdown mode and still monitor activi-ty on external devices. Three-state drivers are provid-ed on both receiver outputs.Three-state drivers on both receiver outputs are provid-ed so that multiple receivers, generally of different inter-face standards, can be wire-ORed at the UART.Switch-Mode Power SupplyThe switch-mode power supply uses a single inductor with one diode and three small capacitors to generate ±6.5V from an input voltage in the 1.8V to 4.25V range.Inductor SelectionUse a 15µH inductor with a saturation current rating of at least 350mA and less than 1Ωresistance. Table 1 lists suppliers of inductors that meet the 15µH/350mA/1Ωspecifications.MAX32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™_______________________________________________________________________________________5______________________________________________________________Pin Description™ LapLink is a trademark of Traveling Software, Inc.AutoShutdown is a trademark of Maxim Integrated Products.M A X 3218Diode SelectionKey diode specifications are fast recovery time (<10ns),average current rating (>100mA), and peak current rat-ing (>350mA). Inexpensive fast silicon diodes, such as the 1N6050, are generally recommended. More expen-sive Schottky diodes improve efficiency and give slightly better performance at very low V CC voltages. Table 1lists suppliers of both surface-mount and through-hole diodes. 1N914s are usually satisfactory, but specifica-tions and performance vary widely with different manu-facturers.Capacitor SelectionUse capacitors with values at least as indicated in Figure 1. Capacitor C2 determines the ripple on V+, but not the absolute voltage. Capacitors C1 and C3 deter-mine both the ripple and the absolute voltage of V-.Bypass V CC to GND with at least 1µF (C4) placed close to pins 5 and 6. If the V CC line is not bypassed else-where (e.g., at the power supply), increase C4 to 4.7µF.You may use ceramic or polarized capacitors in all locations. If you use polarized capacitors, tantalum types are preferred because of the high operating fre-quency of the power supplies (about 250kHz). If alu-minum electrolytics are used, higher capacitance values may be required.1µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™6_______________________________________________________________________________________Table 1. Suggested Component SuppliersFigure 1. Typical Operating CircuitRS-232 DriversThe two drivers are identical, and deliver EIA/TIA-232E and EIA/TIA-562 output voltage levels when V CC is between 1.8V and 4.25V. One transmitter can drive up to 3k Ωin parallel with 2500pF at up to 120kbps.Connect unused drivers to either GND or V CC . When FORCEOFF is driven low, or when AutoShutdown circuit-ry senses invalid voltage levels at all receiver inputs, the drivers are disabled and their outputs are forced into a high-impedance state. Driver inputs do not have internal pull-up resistors.RS-232 ReceiversThe two receivers are identical, and accept both EIA/TIA-232E and EIA/TIA-562 input signals. The CMOS receiver outputs are inverting and swing rail-to-rail. Receivers are disabled only when FORCEON and FORCEOFF inputs are low. (See Table 2.)ShutdownWhen FORCEOFF is low, power supplies are disabled and the transmitters are placed in a high-impedance state. Receiver operation is not affected by taking FORCEOFF low. Power consumption is dramatically reduced in shutdown mode. Supply current is minimized when the receiver inputs are static in any one of three states: floating (ground), GND, or V CC .AutoShutdown™A 1µA supply current is achieved with Maxim’s new AutoShutdown feature, which operates when FORCEON is low and FORCEOFF is high. When the MAX3218senses no valid signal level on either receiver input for typically 30µs, the on-board power supply and drivers shut down, reducing supply current to 1µA. Internal 5k Ωresistors pull undriven receiver inputs to ground. This occurs if the RS-232 cable is disconnected or if the con-nected peripheral transmitters are turned off. The sys-tem turns on again when a valid level is applied to either RS-232 receiver input. As a result, the system saves power without changes to the existing BIOS or operating system. When using the AutoShutdown feature, INVALID is high when the device is on and low when the device is shut down. The INVALID output indicates the condition of the receiver inputs.Table 3 summarizes the MAX3218 operating modes.FORCEON and FORCEOFF override the automatic cir-cuitry and force the transceiver into its normal operating state or into its low-power standby state. When neither control is asserted, the IC selects between these states automatically based on receiver input levels. Figure 4depicts valid and invalid RS-232 receiver levels. TheMAX32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™Table 3. AutoShutdown LogicFigure 2. Interface Under Control of PMUTable 2. Receiver StatusM A X 3218MAX3218 shuts down after sensing invalid RS-232 levels for greater than 30µs, ensuring that the AutoShutdown mode is not enabled for slow-moving signals (>1V/µs).Another system with AutoShutdown may need a period of time to wake up. Figure 5 shows a circuit that forces the transmitters on for 100ms after start-up, allowing enough time for the other system to realize that the MAX3218 system is awake. If the other system outputs valid RS-232 signals within that time, the RS-232 ports on both systems remain enabled.__________Applications InformationOperation from Regulated/UnregulatedDual System Power SuppliesThe MAX3218 is intended for use with three different power-supply sources: it can be powered directly from a battery, from a 3.0V or 3.3V power supply, or simulta-neously from both. Figure 1 shows the single-supply configuration. Figure 6 shows the circuit for operation from both a 3V supply and a raw battery supply—an ideal configuration where a regulated 3V supply is being derived from two cells. In this application, the MAX3218’s logic levels remain appropriate for interface with 3V logic, yet most of the power for the MAX3218 isdrawn directly from the battery, without suffering the efficiency losses of the DC-DC converter. This pro-longs battery life.Bypass the input supplies with 0.1µF at V CC (C4) and at least 1µF at the inductor (C5). Increase C5 to 4.7µF if the power supply has no other bypass capacitor con-nected to it.Low-Power OperationThe following suggestions will help you get maximum life out of your batteries.Transmit at the highest practical data rate. Although this raises the supply current while transmission is in progress, the transmission will be over sooner. If the MAX3218 is shut down (using FORCEOFF) as soon as each transmission ends, this practice will save energy.Operate your whole system from the raw battery volt-age rather than suffer the losses of a regulator or DC-DC converter. If this is not possible, but your system is powered from two cells and employs a 3V DC-DC con-verter to generate the main logic supply, use the circuit of Figure 6. This circuit draws most of the MAX3218’s power straight from the battery, but still provides logic-level compatibility with the 3V logic.1µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™8_______________________________________________________________________________________Figure 3. AutoShutdown LogicKeep communications cables short to minimize capaci-tive loading. Lowering the capacitive loading on the transmitter outputs reduces the MAX3218’s power con-sumption. Using short, low-capacitance cable also helps transmission at the highest data rates.EIA/TIA-232E and_____________EIA/TIA-562 StandardsRS-232 circuits consume much of their power because the EIA/TIA-232E standard demands that the transmit-ters deliver at least 5V to receivers with impedances that can be as low as 3k Ω. For applications where power consumption is critical, the EIA/TIA-562 standard provides an alternative.EIA/TIA-562 transmitter output voltage levels need only reach ±3.7V, and because they have to drive the same 3k Ωreceiver loads, the total power consumption is con-siderably reduced. Since the EIA/TIA-232E and EIA/TIA-562 receiver input voltage thresholds are the same, interoperability between EIA/TIA-232E and EIA/TIA-562 devices is guaranteed. Maxim’s MAX560and MAX561 are EIA/TIA-562 transceivers that operate on a single supply from 3.0V to 3.6V, and the MAX562transceiver operates from 2.7V to 5.25V while produc-ing EIA/TIA-562 levels.MAX32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™_______________________________________________________________________________________9Figure 4. AutoShutdown Trip LevelsFigure 5. AutoShutdown with Initial Turn-On to Wake Up a SystemM A X 32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™10______________________________________________________________________________________Figure 6. Operating from Unregulated and Regulated SuppliesMAX32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™______________________________________________________________________________________11_____+3V-Powered EIA/TIA-232 and EIA/TIA-562 Transceivers from MaximMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses areimplied. Maxim reserves the right to change the circuitry and specifications without notice at any time.12__________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 (408) 737-7600©1995 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.M A X 32181µA Supply Current, 1.8V to 4.25V-Powered RS-232 Transceiver with AutoShutdown™________________________________________________________Package Information___________________Chip TopographyC1+GND T1OUT FORCEON FORCEOFFT2OUTGND T1INLXINVALID V+R2IN R1OUTT2IN R2OUT0.101" (2.565mm)0.122" (3.099mm)R1IN C1-V-GNDVCCTRANSISTOR COUNT: 571SUBSTRATE CONNECTED TO GND。
贴片元件手册
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BCX51-16 BCW60D ZMV832A BCW60D BCW60D BCW60D MAX809SXR 2SC3838K MAX6406BS22-T MAX6406BS23-T MAX6406BS24-T MAX6406BS25-T BCX52 ZMV833A MAX6406BS26-T MAX6406BS27-T MAX6406BS28-T MAX6406BS29-T MAX6406BS30-T MAX6406BS31-T MAX6407BS22-T MAX6407BS23-T MAX6407BS24-T MAX6407BS25-T MAX6407BS26-T MAX6407BS27-T MAX6407BS28-T MAX6407BS29-T
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CMY213中文资料
CMY 213
7 65 8
34 12
VPW05982
Type CMY 213
Marking M6s
Ordering Code (tape and reel)
GC
8.0
FSSB
–
RFIrl/IFOrl –
9.5 –
8
–
10 –
3rd Order Input Intercept Point
IIP3
8
10 –
LO-RF Isolation
Iso
–
10 –
Unit
mA
dB dB dB
dBm dB
*Important Note: During production, the RF performance at PCS frequencies is screened. The passed devices also achieve the specified RF performance at cellular frequencies.
GND
EHT09227
Figure 2 Test Circuit
Data Sheet
5
2001-01-01
External Components for Cellular Frequencies
fRF = 850 MHz; fLO = 740 MHz; fIF = 110 MHz
Capacitors
cies for PLO = – 5 dBm (operation conditions: 3 V, 8 mA; fRF = 850 MHz; fLO = 740 MHz):
LM621中文资料
TL H 8679LM621 Brushless Motor CommutatorAugust1992LM621Brushless Motor CommutatorGeneral DescriptionThe LM621is a bipolar IC designed for commutation ofbrushless DC motors The part is compatible with boththree-and four-phase motors It can directly drive the powerswitching devices used to drive the motor The LM621pro-vides an adjustable dead-time circuit to eliminate‘‘shoot-through’’current spiking in the power switching circuitryOperation is from a5V supply but output swings of up to40V are accommodated The part is packaged in an18-pindual-in-line packageFeaturesY Adjustable dead-time feature eliminates current spikingY On-chip clock oscillator for dead-time featureY Outputs drive bipolar power devices(up to35mA basecurrent)or MOSFET power devicesY Compatible with three-and four-phase motorsBipolar drive to delta-or Y-wound motorsUnipolar drive to center-tapped Y-wound motorsSupports30-and60-degree shaft position sensorplacements for three-phase motorsSupports90-degree sensor placement for four-phasemotorsY Directly interfaces to pulse-width modulator output(s)via OUTPUT INHIBIT(PWM magnitude)and DIREC-TION(PWM sign)inputsY Direct interface to Hall sensorsY Outputs are current limitedY Undervoltage lockoutConnection DiagramTL H 8679–1Order Number LM621NSee NS Package Number N18AC1995National Semiconductor Corporation RRD-B30M115 Printed in U S AAbsolute Maximum Ratings(See Notes)If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications V CC1a7V V CC2a45V Logic Inputs(Note1)V CC1a0 5V b0 5V Logic Input Clamp Current20mA Output Voltages a45V b0 5V Output Currents Internally current limited Operating Ambient Temperature RangeLM621b40 C to a85 C Storage Temperature Range b65 C to a150 C Junction Temperature150 C ESD Susceptibility(Note10)2000V Lead Temperature N pkg(Soldering 4sec )260 CElectrical Characteristics(See Notes)Parameter Conditions Typ Tested DesignUnits Limits LimitsDECODER SECTIONHigh Level Input VoltageHS1 HS2 HS3 2 02 0V min 30 60SELECT 2 02 0V minHigh Level Input CurrentHS1 HS2 HS3 V IH e V CC1100200m A max 30 60SELECT V IH e V CC1120240m A maxLow Level Input VoltageHS1 HS3and HS230 60e5V0 60 4V max HS1 HS3and HS230 60e0V0 60 4V max 30 60Select H SI e H S3e5V0 60 4V maxLow Level Input CurrentHS1and HS3 V IL e0 35V b400b600m A max HS2 V IL e0 4V b100b200m A max 30 60SELECT V IL e0 0V b700b1000m A maxInput Clamp Voltage I in e1mA(V CC1a0 7)V (Pins2 3 5 6 7 8 17)I in e b1mA(b0 6)VOutput Leakage Current Outputs OffSinking Outputs V CC2e40V 0 21 0m AV OUT e40VSourcing Outputs V OUT e0V b0 2b1 0m AShort-Circuit Current V CC2e10V 5035mA min Sinking Outputs V OUT e10VSourcing Outputs V OUT e0V b50b35mA minV sat(sinking)I e20mA0 831 00V max V drop(sourcing)e(V CC2b V OUT)I e b20mA1 72 00V maxOutput Rise Time(sourcing)50nsC L k10pFOutput Fall Time(sinking)50nsC L s10pFPropagation Delay Dead-Time Off200ns (Hall Input to Output)2Electrical Characteristics(See Notes)(Continued)Parameter Conditions Typ Tested DesignUnits Limits LimitsDEAD-TIME SECTIONHigh Level Input VoltageDIRECTION Pin3e0V2 02 0V min OUTPUT INHIBIT 2 02 0V min DEAD-TIME ENABLE Pin17e0V2 02 0V minHigh Level Input Current V in e5VDIRECTION Pin3e0V100150m A max OUTPUT INHIBIT 60100m A max DEAD-TIME ENABLE 200300m A maxLow Level Input VoltageDIRECTION Pin3e0V0 60 4V max OUTPUT INHIBIT 0 60 4V max DEAD-TIME ENABLE 0 30 2V maxLow Level Input CurrentDIRECTION V in e0 6V b100b150m A max OUTPUT INHIBIT V in e0 6V b60b100m A max DEAD-TIME ENABLE V in e0V b200b300m A maxPropagation Delays Dead-Time Off(Inputs to Outputs)(Pin3e0V)OUTPUT INHIBIT200ns DIRECTION200nsMinimum Clock Period R e11k X R1e1k1 8m sT CLK(Notes3 11)C e200pFClock Accuracy R e30k R1e1kg3%f e100kHz(Note11)C e420pFMinimum Dead-Time Dead-Time Off15ns Minimum Dead-Time Dead-Time On2T CLK COMPLETE CIRCUITTotal Current Drains Outputs OffI CC110mA minI CC1152230mA maxI CC2V CC2e40V2mA minI CC2369mA maxUndervoltage Lockout3 63 0V MAXV CC1Note1 Unless otherwise noted ambient temperature(T A)e25 CNote2 Unless otherwise noted V CC1e a5 0V ‘‘recommended operating range V CC e4 5V to5 5V’’V CC2e a10 0V ambient temperature e25 CNote3 The clock period is typically T CLK e(0 756c10b3)(R a1)C where T CLK is in m s R is in k X and C is pF Also see selection graph in Typical Characteristics for determining values of R and C Note that the value of R should be no less than11k X and C no less than200pFNote4 Tested limits are guaranteed and100%production testedNote5 Design limits are guaranteed(but not100%production tested)at the indicated temperature and supply voltages These limits are not used to calculate outgoing quality levelsNote6 Specifications in boldface apply over junction temperature range of b40 C to a85 CNote7 Typical Thermal Resistances O JA(see Note8)N pkg board mounted110 C WN pkg socketed118 C WNote8 Package thermal resistance indicates the ability of the package to dissipate heat generated on the die Given ambient temperature and power dissipation the thermal resistance parameter can be used to determine the approximate operating junction temperature Operating junction temperature directly effects product performance and reliabilityNote9 This part specifically does not have thermal shutdown protection to avoid safety problems related to an unintentional restart due to thermal time constant variations Care should be taken to prevent excessive power dissipation on the dieNote10 Human body model 100pF discharged through a1500X resistorNote11 R1e0for C t620pF3Typical Performance Characteristicsfor R and CSelection Graph vs TemperatureSupply Currents vs TemperatureSupply Currents V sat vs Temperature V drop vs Temperature( T A e 25 C)Typ V drop vs I out source Typ V sat vs I out sinkTL H 8679–2Description of Inputs and OutputsPin 1 V CC1(a 5V) The logic and clock power supply pin Pin 2 DIRECTION This input determines the direction of rotation of the motor ie clockwise vs counterclockwise See truth tablePin 3 DEAD-TIME ENABLE This input enables or disables the dead-time feature Connecting a 5V to pin 3enables dead-time and grounding pin 3disables it Pin 3should not be allowed to floatPin 4 CLOCK TIMING An RC network connected between this pin and ground sets the period of the clock oscillator which determines the amount of dead-time See Figure 2and textPins 5thru 7 HS1 HS2 and HS3(Hall-sensor inputs) These inputs receive the rotor-position sensor inputs from the motor Three-phase motors provide all three signals four phase motors provide only two one of which is con-nected to both HS2and HS3Pin 8 30 60SELECT This input is used to select the re-quired decoding for three-phase motors ie either ‘‘30-de-gree’’(a 5V)or ‘‘60-degree’’(ground) Connect pin 8to a 5V when using a four-phase motorPin 9 LOGIC GROUND Ground for the logic power supplyPin 10 POWER GROUND Ground for the output buffer supplyPins 11thru 13 SOURCE OUTPUTS The three current-sourcing outputs which drive the external power devices that drive the motorPins 14thru 16 SINK OUTPUTS The three current-sinking outputs which drive the external power devices that drive the motorPin 17 OUTPUT INHIBIT This input disables the LM621outputs It is typically driven by the magnitude signal from an external sign magnitude PWM generator Pin 17e a 5V e outputs offPin 18 V CC2(a 5to a 40V) This is the supply for the collectors of the three current-sourcing outputs (pins 11thru 13) When driving MOSFET power devices pin 18may be connected to a voltage source of up to a 40V to achieve sufficient output swing for the gate When driving bipolar power devices pin 18should be connected to a 5V to mini-mize on-chip power dissipation Undervoltage lockout auto-matically shuts down all outputs if the V CC1supply is too low All outputs will be off if V CC1falls below the undervol-tage lockout voltage4Functional DescriptionThe commutation decoder receives Hall-sensor inputs HS1 HS2 and HS3and a30 60SELECT input This block de-codes the gray-code sequence to the required motor-drive sequenceThe dead-time generator monitors the DIRECTION input and inhibits the outputs(pins11thru16)for a time sufficient to prevent current-spiking in the external power switches when the direction is reversedThe six chip outputs drive external power switching devices which drive the motor Three outputs source current the remaining three sink current The output transistors provide up to50mA outputs for driving devices or up to40V output swings for driving MOSFETs The LM621logic is powered from5VThe undervoltage lockout section monitors the V CC supply and if the voltage is not sufficient to permit reliable logic operation the outputs are shutdownThree-Phase Motor Commutation There are two popular conventions for establishing the rela-tive phasing of rotor-position signals for three-phase mo-tors While usually referred to as30-degree and60-degree sensor placements this terminology refers to mechanical degrees of sensor placement not electrical degrees The electrical angular resolution is the required60degrees in both cases The phasing differences can be noted by com-paring the sequences of HS1through HS3entries in Table I LM621Commutation Decoder Truth Table which shows both the30-and60-degree phasings(and the90-degree phasing for four-phase motors)and their required decoder logic truth tables respectively Table I shows the phasing (or codes)of the Hall-effect sensors for each60-degree (electrical)position range of the rotor and correlates these data to the commutator sink and source outputs required to drive the power switches These phasings are common to several motor manufacturers The60-degree phasing is pre-ferred to30-degree phasing because the all-zeros and all-ones codes are not generated The60-degree phasing is more failsafe because the all-zeros and all-ones codes could be inadvertently generated by things like disconnect-ed or shorted sensorsBecause the above terminology is not used consistently among all motor manufacturers Table II Alternative Sen-sor-phasing Names will hopefully clarify some of the differ-ences Table II shows a different60-degree phasing and 120- 240- and300-degree phasings Comparison with Ta-ble I will show that these four phasings are essentially shift-ed and or reversed-order versions of those used with the LM621Figure1shows the waveforms associated with the commu-tation decoder logic for a motor which has60-degree rotor-position phasing along with the generated motor-drive waveforms As can be seen in the drawing Hall-effect sen-sor signals HS1through HS3are separated by60electrical degrees which is the required angular resolution for three-phase motorsTL H 8679–6FIGURE1 Commutation Waveforms for60-degree Phasing5Three-Phase Motor Commutation(Continued)TABLE I LM621Commutation Decoder Truth TableSensor Position Sensor Inputs Sink Outputs Source Outputs Phasing Range HS1HS2HS31231230–60000ON off off off ON off60–120001ON off off off off ON 30deg120–180011off ON off off off ON 180–240111off ON off ON off off240–300110off off ON ON off off300–360100off off ON off ON off0–60101ON off off off ON off60–120100ON off off off off ON 60deg120–180110off ON off off off ON 180–240010off ON off ON off off240–300011off off ON ON off off300–360001off off ON off ON off0–9001HS2off na off off na ON 90deg90–18000HS2ON na off off na off 180–27010HS2off na ON off na off270–36011HS2off na off ON na off Pin Numbers 567161514131211 Note1 The above outputs are generated when the Direction input pin2 is logic high For reverse rotation(pin2logic low) the above sink and source output states become exchangedNote2 For four-phase motors sink and source outputs number two(pins15and12)are not used hense the‘‘na’’(not applicable)in the appropriate columns above Figure6shows how the required sink and source outputs for four-phase motors are derivedTABLE II Alternative Sensor-Phasing NamesAlternate Position Sensor Inputs Corresponding LM621Position Phasing Range HS1HS2HS3Range and or Comments0–60000Same as30-degree phasing but in reverse60–120100order i e only change is relative direction‘‘60deg’’120–180110180–240111240–300011300–3600010–60001Same as60-degree phasing but with shifted60–120101order of position ranges i e only change is‘‘120deg’’120–180100relative phasing of sensor signals180–240110240–300010300–3600110–60010Same comment as above for‘‘120deg’’60–120110phasing‘‘240deg’’120–180100180–240101240–300001300–3600110–60011Same as30-degree phasing but with shifted60–120111order of position ranges i e only change is‘‘300deg’’120–180110relative phasing of sensor signals180–240100240–300000300–360001Four-Phase Motor CommutationFour-phase motors use a90-degree(quadrature)rotor-posi-tion sensor phasing This phasing scheme is also shown in Table I LM621Commutation Decoder Truth Table As shown in Table I the90-degree phasing has only two rotor-position-sensor signals HS1and HS2 When using the LM621to run a four-phase motor the HS2signal is connect-ed to both the HS2and HS3chip inputs6Dead-Time FeatureThe DEAD-TIME ENABLE input is used to enable this fea-ture (by connecting a 5V to pin 3) The reason for providing this feature is that the external power switches are usually totem-pole structures Since these structures switch heavy currents if either totem-pole device is not completely turned off when its complementary device turns on heavy ‘‘shoot-through’’current spiking will occur This situation occurs when the motor DIRECTION input changes (when all output drive polarities reverse) at which time device turn-off delay can cause the undesired current spikingFigure 2shows the logic of the dead-time generator The dead-time generator includes an RC oscillator to generate a required clock Pin 4(CLOCK TIMING)is used to connect an external RC network to set the frequency of this oscilla-tor The clock frequency should be adjusted so that two periods of oscillation just slightly exceed the worst-case turn-off time of the power switching devices As shown bythe graph in Typical Peformance Characteristics the time ofone clock period (in m s)is approximately (0 756c 10b3)(R a 1)C where R is in k X and C is in pF the period can be measured with an oscilloscope at pin 4 The dead-time generator function monitors the DIRECTION input for changes synchronizes the direction changes with the inter-nal clock and inhibits the chip outputs for two clock periods Flip-flops FF1through FF3form a three-bit shift-register delay line the input of which is the DIRECTION input The flip-flops are the only elements clocked by the internal clock generator The shift register outputs must all have the same state in order to enable gate G1or G2 one of which must be enabled to enable the chip outputs As soon as a direc-tion change input is sensed at the output of FF1 gates G1and G2will be disabled thereby disabling the drive to the power switches for a time equal to two clock periodsFIGURE 2 Dead-Time Generator Logic DiagramTL H 8679–7TL H 8679–8FIGURE 3 Dead-Time Generator Waveforms7Dead-Time Feature(Continued)Dead-time is defined as the time the outputs are blanked off (to prevent shoot-through currents)after a direction change input See Figure3 It can be seen that the dead-time is two clock periods Since the dead-time scheme introduces de-lay into the system feedback control loop which could im-pact system performance or stability it is important that the dead-time be kept to a minimum From Figure3it can be seen that the time between a direction change signal and the initiation of output blanking can vary up to one clock period due to asynchronous nature of the clock and the direction signalTypical ApplicationsTHREE-PHASE EXAMPLESFigure4is a typical LM621application This circuitry is for use with a three-phase motor having30-degree sensor phasing as indicated by connection of the30 60SELECT input pin8 to a logic‘‘1’’(a5V) The same connection of the DEAD-TIME ENABLE input pin3 enables this feature Typical power switches and a simple implementation of an overcurrent sensing circuit are also detailed in Figure4 This application example assumes a device turn-off time of about 4 8m s maximum as evidenced by the choice of R and C See Typical Performance Characteristics The choice of RC should be made such that two periods are at least equal to the maximum device turn-off timeThe choice of the value for R limit(the resistors which couple the LM621outputs to the power switches)depends on the input current requirements of the power switching devices These resistors should be chosen to provide only the amount of current needed by the device inputs up to50mA (typical) The resistors minimize the dissipation incurred by the LM621 Although Figure4shows the5–40V supply(pin 18)connected to the motor supply voltage this was done only to emphasize the ability of the part to provide up to40V output swings For the bipolar power switches shown con-necting pin18to a5V supply would reduce on-chip power dissipation Driving FET power switches however may re-quire connecting pin18to a higher voltage Figure5is the three-phase application built with MOSFET power-switching components Note that since the output V drop(sourcing)is at least1 5V V CC2can be chosen to avoid overdriving the MOSFET gatesTL H 8679–9FIGURE4 Commutation of Three-Phase Motor(Bipolar Switches)8Typical Applications(Continued)TL H 8679–10 FIGURE5 Commutation of Three-Phase Motor(MOSFET Switches)9Typical Applications(Continued)FOUR-PHASE EXAMPLEFigure6is typical of the circuitry used to commutate a four-phase motor using the LM621 This application is seen to differ from the three-phase application example in that the LM621outputs are utilized differently Four-phase motors require four-phase power switches which in turn require the commutator to provide four current-sinking outputs and four current sourcing outputs The18-pin package of the LM621 facilitates only three sinking and three sourcing outputs The schematic shows the30 60SELECT input in the30-degree select state(pin8high)and rotor-position sensor inputs HS2and HS3connected together This connection trun-cates the number of possible rotor-position input states to four which is consistent with the90-degree quadrature ro-tor-position signals provided by four-phase motors With the LM621outputs connected as shown this approach pro-vides the needed power-switch drive signals for a four-phase motor Note that only four of the six LM621outputs (SINK 1and 3 and SOURCE 1and 3)are used directly and that these are also inverted to form the remain-ing four SINK 2and SOURCE 2outputs are not used HALF-WAVE DRIVE EXAMPLEThe previous applications examples involved delta-config-ured motor windings and full-wave operation of the motor The application shown in Figure7differs in that it features half-wave operation of a motor with the windings in a Y-con-figuration This approach is suitable for automotive and oth-er applications where only low-voltage power supplies are conveniently available The advantage of this power-switch-ing scheme is that there is only one switch-voltage drop in series with the motor winding thereby conserving more of the available voltage for application to the motor winding Half-wave operation provides only unidirectional current to the windings in contrast to the bidirectional currents applied by the previous full-wave examplesTL H 8679–11FIGURE6 Commutation of Four-Phase Motor10Typical Applications(Continued)TL H 8679–12FIGURE7 Half-Wave Drive of Y-Configured Motor11L M 621B r u s h l e s s M o t o r C o m m u t a t o r Physical Dimensions inches (millimeters)Lit 107155Molded Dual-in-Line Package (N)Order Number LM621NNS Package Number N18ALIFE SUPPORT POLICYNATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL SEMICONDUCTOR CORPORATION As used herein1 Life support devices or systems are devices or2 A critical component is any component of a life systems which (a)are intended for surgical implantsupport device or system whose failure to perform can into the body or (b)support or sustain life and whosebe reasonably expected to cause the failure of the life failure to perform when properly used in accordancesupport device or system or to affect its safety or with instructions for use provided in the labeling caneffectiveness be reasonably expected to result in a significant injuryto the userNational SemiconductorNational Semiconductor National Semiconductor National Semiconductor CorporationEurope Hong Kong Ltd Japan Ltd 1111West Bardin Road Fax (a 49)0-180-530858613th Floor Straight Block Tel 81-043-299-2309。
SAE USCAR-2-2013第6版中文
汽车电连接器系统性能规范SAE/USCAR-2第6版2013.2ISBN:978-0-7680-7998-2SAE/USCAR-2第6版颁布日期1997年8月修订日期2013年2月汽车电连接器系统的性能规范目录1.范围 (3)2.试验顺序 (3)3.参考文档 (3)3.1文件的层次 (3)3.2零件图 (4)3.3产品设计规范 (4)3.4测试要求/指令 (4)3.4.1样品,测试类型,和特殊测试 (4)3.4.2测试要求/指令说明 (4)3.4.3性能和耐久性测试说明 (4)3.5本规范中所提到的文档 (4)4.一般要求 (5)4.1纪录保存 (5)4.2样品文件 (5)4.3样品数量 (5)4.4默认测试公差 (5)4.5设备 (6)4.6测量精确度 (6)4.7测试重复性&校准 (6)4.8一致性测定 (7)4.9样品的处置 (7)4.10零件的耐久性 (7)5.测试和验收要求 (7)5.1总则 (7)5.1.1性能要求 (7)5.1.2尺寸特性 (7)5.1.3材料特性 (7)5.1.4分类等级 (8)5.1.5试验端板&直接连接组件 (9)5.1.6端子样品准备 (10)5.1.7连接器和/或端子循环 (10)5.1.8外观检验 (11)5.1.9电路连续性监测 (12)5.1.10多腔(垫)导体密封样品准备 (14)The research data,analysis,conclusion,opinions and other contents of this document are solely the product of the authors.Neither the SAE International(SAE)nor the United States Council for Automotive Research(USCAR)certifies the compliance of any products with the requirements of nor makes any representations as to the accuracy of the contents of this document nor to its applicability for purpose.It is the sole responsibility of the user of this document to determine whether or not it is applicable for their purposes.Copyright©2013USCAR Printed in U.S.A. All rights reserved.QUESTIONS REGARDING THIS DOCUMENT:(248)273-2470FAX(248)273-2494TO PLACE A DOCUMENT ORDER:(724)776-4970FAX(724)776-07905.2端子机械测试 (14)5.2.1端子到端子的啮合/分离力 (14)5.2.2端子抗弯性 (15)5.3端子-电器性能试验 (17)5.3.1干电路电阻 (17)5.3.2电压降 (19)5.3.3最大试验电流能力 (21)5.3.4电流循环 (24)5.4连接器-机械性能试验 (25)5.4.1端子至连接器插入/保持和前止力 (25)5.4.2连接器至连接器插入/拔出/保持/锁扭转力(非辅助) (29)5.4.3连接器到连接器的插拔力(机械辅助) (31)5.4.4极性特征有效性 (34)5.4.5混合组件的啮合分离力 (35)5.4.6振动/机械冲击 (37)5.4.7连接器到连接器可听见的咔哒响 (44)5.4.8连接器跌落测试 (44)5.4.9模腔损坏系数 (45)5.4.10端子/型腔极性测试 (46)5.4.11连接器安装特征机械强度 (47)5.4.12机械辅助完整性–(仅有机械辅助的连接器) (49)5.4.13连接器密封保持-未插合的连接器 (50)5.4.14连接器密封保持-插合的连接器 (52)5.5连接器-电气性能测试 (52)5.5.1绝缘电阻 (52)5.6连接器环境测试 (53)5.6.1热冲击 (53)5.6.2温湿度循环 (54)5.6.3高温暴露 (55)5.6.4耐流体性能 (56)5.6.5浸泡 (57)5.6.6压力/真空泄露 (58)5.6.7高压喷射 (60)5.7端板测试 (61)5.7.1端板插针保持力 (61)5.8剧烈任务试验 (63)5.9测试顺序 (63)5.9.1一般说明 (63)5.9.2测试流程图 (63)5.9.3端子机械性能测试顺序 (64)5.9.4端子电气性能测试顺序 (64)5.9.5连接器系统机械性能测试顺序 (64)5.9.6连接器系统电气性能测试顺序 (65)5.9.7密封性连接器系统环境性能测试顺序 (66)5.9.8非密封性连接器系统环境性能测试顺序 (67)5.9.9独立密封性能测试顺序 (67)6.附录 (68)6.1附录A:术语 (68)6.2附录B:缩略语 (70)6.3附录C:对于新的或移动工具和材料变更的测试 (72)6.4附录D:对于新的/现有的端子或连接器设计的测试 (73)6.5附录E:来源列表 (74)6.6附录F:设计说明:温度和额定电流 (75)6.7附录G:修订 (76)1.范围本规范中包含的程序旨在涵盖在低电压（0-20VD C）道路车辆应用中组成电气连接系统的电气终端、连接器和部件的开发、生产和现场分析的所有阶段的性能测试。
MAX713中文资料
BATTERY MANAGEMENT Jul 09, 1998 Switch-Mode Battery Charger Delivers 5AThe fast-charge controller IC3 (Figure 1) normally directs current to the battery via an external pnp transistor. In this circuit, the transistor is replaced with a 5A switching regulator (IC1) that delivers equivalent power with higher efficiency.Figure 1. By controlling the PWM duty cycle of switching regulator IC1, the fast-charge controller (IC3) makes efficient delivery of the battery's charging current.IC1 is a 5A buck switching regulator whose output is configured as a current source. Its internal power switch (an npn transistor) is relatively efficient because V CE(SAT) is small in comparison with the 15V-to-40V inputs. (For applications that require 2A or less, the low-saturation, non-Darlington power switch of a MAX726 offers better efficiency.)R6 senses the battery-charging current and enables IC3 to generate an analog drive signal at DRV. The signal is first attenuated by the op amp to assure stability by reducing gain in the control loop. It then drives IC1's compensation pin (VC), which gives direct access to the internal PWM comparator. IC3 thus controls the charging current via the PWM duty cycle of IC1. The Q1 buffer provides current to the DRV input.Loop stability is also determined by the feedback loop's dominant pole, set by C4 at the CC terminal of IC3. If you increase the value of the battery filter capacitor (C5), you should make a proportional increase in the value of C4. Lower values, however, assure good transient response. If your application produces load transients during the fast-charge cycle, check the worst-case response to a load step. To assure proper termination of the charge, battery voltage should settle within 2msec to 5mV times N (where N is the number of battery cells). More InformationMAX713:QuickView-- Full (PDF) Data Sheet-- Free Samples。
MAX3087ESA中文资料
375
256
MAX3084
Full
0.5
Yes
No
No
375
256
MAX3085
Half
0.5
Yes
Yes
Yes
375
256
MAX3086
Full
10
No
Yes
Yes
375
256
MAX3087
Full
10
No
No
No
375
256
MAX3088
Half
10
No
Yes
Yes
375
256
MAX3089 Selectable Selectable Selectable
These transceivers typically draw 375µA of supply current when unloaded, or when fully loaded with the drivers disabled.
All devices have a 1/8-unit-load receiver input impedance that allows up to 256 transceivers on the bus. The MAX3082/MAX3085/MAX3088 are intended for halfduplex communications, while the MAX3080/MAX3081/ MAX3083/MAX3084/MAX3086/MAX3087 are intended for full-duplex communications. The MAX3089 is selectable between half-duplex and full-duplex operation. It also features independently programmable receiver and transmitter output phase via separate pins.
X20(c)AO4622 13位数字转换模块说明书
X20(c)AO46221 General informationThe module is equipped with 4 outputs with 13-bit (including sign) digital converter resolution. It is possible to select between the current and voltage signal using different terminals.•4 analog outputs•Either current or voltage signal possible•13-bit digital converter resolution2 Coated modulesCoated modules are X20 modules with a protective coating for the electronics component. This coating protects X20c modules from condensation and corrosive gases.The modules' electronics are fully compatible with the corresponding X20 modules.For simplification purposes, only images and module IDs of uncoated modules are used in this data sheet.The coating has been certified according to the following standards:•Condensation: BMW GS 95011-4, 2x 1 cycle•Corrosive gas: EN 60068-2-60, method 4, exposure 21 days2.1 Starting temperatureThe starting temperature describes the minimum permissible ambient temperature when the power is switched off at the time the coated module is switched on. This is permitted to be as low as -40°C. During operation, the conditions as specified in the technical data continue to apply.Information:It is important to absolutely ensure that there is no forced cooling by air currents in a closed control cabinet, for example using a fan or ventilation slots.3 Order dataTable 1: X20AO4622, X20cAO4622 - Order data4 Technical dataTable 2: X20AO4622, X20cAO4622 - Technical dataTable 2: X20AO4622, X20cAO4622 - Technical data1) 4 to 20 mA: From upgrade version 1.0.2.0 and hardware revision "I0"2)Based on the current output value.3)Based on the entire output range.4)Based on the output range.5 LED status indicatorsFor a description of the various operating modes, see section "Additional information - Diagnostic LEDs" of the X20 system user's manual.1)Depending on the configuration, a firmware update can take up to several minutes.The individual channels can be configured for either current or voltage signals. The type of signal is also determined by the terminals used.1X 20 A O 4622234r e 7 Connection exampleAO8 Output circuit diagramTo ensure proper operation, the following points must be taken into account:•The derating values listed below must be taken into account.•In mixed operation with one current output, the mean value of both derating curves must be applied.•In mixed operation with 2 or 3 current outputs, the derating of the current outputs must be applied.10 Register description10.1 General data pointsIn addition to the registers described in the register description, the module has additional general data points. These are not module-specific but contain general information such as serial number and hardware variant. General data points are described in section "Additional information - General data points" of the X20 system user's manual.10.2 Function model 0 - Standardand function model 1 - I/O with fast response10.3 Function model 254 - Bus controller1)The offset specifies the position of the register within the CAN object.10.3.1 Using the module on the bus controllerFunction model 254 "Bus controller" is used by default only by non-configurable bus controllers. All other bus controllers can use other registers and functions depending on the fieldbus used.For detailed information, see section "Additional information - Using I/O modules on the bus controller" of the X20 user's manual (version 3.50 or later).10.3.2 CAN I/O bus controllerThe module occupies 1 analog logical slot on CAN I/O.10.4 Function model comparisonFunction model 0: I/O without jitter (standard)With a minimum cycle of ≥400 μs, the corrected values are output in the next cycle. This reduces jitter to a minimum. Function model 1: I/O with fast responseWith a minimum cycle of ≥400 μs, the corrected values are output in the same cycle (optimized response).The two function models compared10.5 Analog outputsThe individual channels can be configured for either current or voltage signals. The type of signal is also determined by the terminals used.10.5.1 Output values of the analog outputName:AnalogOutput01 to AnalogOutput04The normalized output values are specified via these registers. After a permissible value is transferred, the module outputs the corresponding current or voltage.1)Starting with upgrade version 1.0.2.0 and hardware revision "I0"10.5.2 Setting the channel typeName:ConfigOutput01The channel type of the outputs can be defined in this register.The individual channels are designed for current and voltage signals. The differentiation is made by different ter-minal connections; because of different adjustment values for current and voltage, the output signal must also be selected. The following output signals can be set:•±10 V voltage signal•0 to 20 mA current signal•Bit structure:10.6 Minimum cycle timeThe minimum cycle time specifies the time up to which the bus cycle can be reduced without communication errors occurring. It is important to note that very fast cycles reduce the idle time available for handling monitoring, diagnostics and acyclic commands.10.7 Minimum I/O update timeThe minimum I/O update time specifies how far the bus cycle can be reduced so that an I/O update is performed in each cycle.。
BT-21资料
-
Additional Documentation
BT Hardware Design Guide abSerial User Guide abSerial Reference Guide
©2008 Amp’ed RF Inc 1 9/29/08
1722 Ringwood Ave, Suite 250, San Jose, CA 95131, USA
Upper Layer Stack
SPP, OBEX, SDAP, GAP, and DUN protocols RFComm, SDP, and L2CAP supported
HCI Interface
Bluetooth v2.0 specification compliant HCI UART transport layer (H4) Firmware upgrade over UART
(phone) 408 213-9530 (fax) 408 213-9533
I/O Operating Characteristics
Symbol VIL
Parameter Low-Level Input Voltage High-Level Input Voltage Low-Level Output Voltage High-Level Output Voltage Low -Level Output Current High-Level Output Current Pull-up Resistor Pull-down Resistor
Absolute Maximum Ratings
Rating Storage temperature range Supply voltage, VIN I/O pin voltage, VIO RF input power Min -55 -0.3 -0.3 Typical Max +150 + 3.6 + 4.0 -5 Unit °C Volts Volts dBm
MAX1978中文数据手册
用于Peltier模块的集成温度控制器概论MAX1978 / MAX1979是用于Peltier热电冷却器（TEC）模块的最小, 最安全, 最精确完整的单芯片温度控制器。
片上功率FET和热控制环路电路可最大限度地减少外部元件, 同时保持高效率。
可选择的500kHz / 1MHz开关频率和独特的纹波消除方案可优化元件尺寸和效率, 同时降低噪声。
内部MOSFET的开关速度经过优化, 可降低噪声和EMI。
超低漂移斩波放大器可保持±0.001°C的温度稳定性。
直接控制输出电流而不是电压, 以消除电流浪涌。
独立的加热和冷却电流和电压限制提供最高水平的TEC保护。
MAX1978采用单电源供电, 通过在两个同步降压调节器的输出之间偏置TEC, 提供双极性±3A输出。
真正的双极性操作控制温度, 在低负载电流下没有“死区”或其他非线性。
当设定点非常接近自然操作点时, 控制系统不会捕获, 其中仅需要少量的加热或冷却。
模拟控制信号精确设置TEC 电流。
MAX1979提供高达6A的单极性输出。
提供斩波稳定的仪表放大器和高精度积分放大器, 以创建比例积分（PI）或比例积分微分（PID）控制器。
仪表放大器可以连接外部NTC或PTC热敏电阻, 热电偶或半导体温度传感器。
提供模拟输出以监控TEC温度和电流。
此外, 单独的过热和欠温输出表明当TEC温度超出范围时。
片上电压基准为热敏电阻桥提供偏置。
MAX1978 / MAX1979采用薄型48引脚薄型QFN-EP 封装, 工作在-40°C至+ 85°C温度范围。
采用外露金属焊盘的耐热增强型QFN-EP封装可最大限度地降低工作结温。
评估套件可用于加速设计。
应用光纤激光模块典型工作电路出现在数据手册的最后。
WDM, DWDM激光二极管温度控制光纤网络设备EDFA光放大器电信光纤接口ATE特征♦尺寸最小, 最安全, 最精确完整的单芯片控制器♦片上功率MOSFET-无外部FET♦电路占用面积<0.93in2♦回路高度<3mm♦温度稳定性为0.001°C♦集成精密积分器和斩波稳定运算放大器♦精确, 独立的加热和冷却电流限制♦通过直接控制TEC电流消除浪涌♦可调节差分TEC电压限制♦低纹波和低噪声设计♦TEC电流监视器♦温度监控器♦过温和欠温警报♦双极性±3A输出电流（MAX1978）♦单极性+ 6A输出电流（MAX1979）订购信息* EP =裸焊盘。
MAX038中文资料
高频函数信号发生器MAX038及其应用高频函数信号发生器MAX038及其应用作者：李琳来源：网络目前广泛应用的函数发生器芯片是ICL8038(国产5G8038)，他的主要技术指标是最高振荡频率仅为100 kHz，而且三种输出波形从不同的引脚输出，使用很不方便。
MAX038是ICL8038的升级产品，他的最高振荡频率可达40 MHz，而且由于在芯片内采用了多路选择器，使得三种输出波形可通过编程从同一个引脚输出，输出波形的切换时间可在0.3μs内完成，使用更加方便。
1 MAX038芯片介绍MAX038是MAXIM公司生产的一个只需要很少外部元件的精密高频波形产生器，在适当调整其外部控制条件时，它可以产生准确的高频方波、正弦波、三角波、锯齿波等信号，这些信号的峰峰值精确地固定在2V，频率从0.1Hz~20MHz连续可调，方波的占空比从10%~90%连续可调。
通过MAX038的A0、A1引脚上电平的不同组合，可以选择不同的输出波形类型。
其性能特点如下：(1) 0.1 Hz～20 MHz工作频率范围；(2) 15％～85％可变的占空比；(3) 低阻抗输出缓冲器：0.1；(4) 低失真正弦波：0.75％；(5) 低温度漂移：200 ppm／℃。
MAX038引脚排列如图所示各引脚功能如图所示：Max038内部电路，如图：2 MAX038芯片使用方法2.1 波形选择MAX038可以产生正弦波、方波或三角波。
具体的输出波形由地址A0和A1的输入数据进行设置，如表1所示。
波形切换可通过程序控制在任意时刻进行，而不必考虑输出信号当时的相位。
2.2 波形调整2.2.1 输出频率的调整输出频率调整方式分为粗调和细调两种方法：粗调取决于IIN引脚的输入电流IIN，COSC引脚的电容量CF(对地)以及FADJ引脚上的电压。
当VFADJ=0 V时，输出的中心频率f0为：fo(MHz)=Iin(μA)÷COSC (pF)。
MAX213中文资料
General DescriptionThe MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communica-tions interfaces, particularly applications where ±12V is not available.These parts are especially useful in battery-powered sys-tems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for appli-cations where printed circuit board space is critical.________________________ApplicationsPortable Computers Low-Power Modems Interface TranslationBattery-Powered RS-232 Systems Multidrop RS-232 Networks____________________________Features Superior to Bipolaro Operate from Single +5V Power Supply (+5V and +12V—MAX231/MAX239)o Low-Power Receive Mode in Shutdown (MAX223/MAX242)o Meet All EIA/TIA-232E and V.28 Specifications o Multiple Drivers and Receiverso 3-State Driver and Receiver Outputs o Open-Line Detection (MAX243)Ordering InformationOrdering Information continued at end of data sheet.*Contact factory for dice specifications.MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers________________________________________________________________Maxim Integrated Products 1Selection Table19-4323; Rev 9; 4/00Power No. of NominalSHDN RxPart Supply RS-232No. of Cap. Value & Three-Active in Data Rate Number (V)Drivers/Rx Ext. Caps (µF)State SHDN (kbps)FeaturesMAX220+52/24 4.7/10No —120Ultra-low-power, industry-standard pinout MAX222+52/2 4 0.1Yes —200Low-power shutdownMAX223 (MAX213)+54/54 1.0 (0.1)Yes ✔120MAX241 and receivers active in shutdown MAX225+55/50—Yes ✔120Available in SOMAX230 (MAX200)+55/04 1.0 (0.1)Yes —120 5 drivers with shutdownMAX231 (MAX201)+5 and2/2 2 1.0 (0.1)No —120Standard +5/+12V or battery supplies; +7.5 to +13.2same functions as MAX232MAX232 (MAX202)+52/24 1.0 (0.1)No —120 (64)Industry standardMAX232A+52/240.1No —200Higher slew rate, small caps MAX233 (MAX203)+52/20— No —120No external capsMAX233A+52/20—No —200No external caps, high slew rate MAX234 (MAX204)+54/04 1.0 (0.1)No —120Replaces 1488MAX235 (MAX205)+55/50—Yes —120No external capsMAX236 (MAX206)+54/34 1.0 (0.1)Yes —120Shutdown, three stateMAX237 (MAX207)+55/34 1.0 (0.1)No —120Complements IBM PC serial port MAX238 (MAX208)+54/44 1.0 (0.1)No —120Replaces 1488 and 1489MAX239 (MAX209)+5 and3/52 1.0 (0.1)No —120Standard +5/+12V or battery supplies;+7.5 to +13.2single-package solution for IBM PC serial port MAX240+55/54 1.0Yes —120DIP or flatpack package MAX241 (MAX211)+54/54 1.0 (0.1)Yes —120Complete IBM PC serial port MAX242+52/240.1Yes ✔200Separate shutdown and enableMAX243+52/240.1No —200Open-line detection simplifies cabling MAX244+58/104 1.0No —120High slew rateMAX245+58/100—Yes ✔120High slew rate, int. caps, two shutdown modes MAX246+58/100—Yes ✔120High slew rate, int. caps, three shutdown modes MAX247+58/90—Yes ✔120High slew rate, int. caps, nine operating modes MAX248+58/84 1.0Yes ✔120High slew rate, selective half-chip enables MAX249+56/1041.0Yes✔120Available in quad flatpack packageFor free samples & the latest literature: , or phone 1-800-998-8800.For small orders, phone 1-800-835-8769.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/ReceiversABSOLUTE MAXIMUM RATINGS—MAX220/222/232A/233A/242/243ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243(V CC = +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T A = T MIN to T MAX ‚ unless otherwise noted.)Note 1:Input voltage measured with T OUT in high-impedance state, SHDN or V CC = 0V.Note 2:For the MAX220, V+ and V- can have a maximum magnitude of 7V, but their absolute difference cannot exceed 13V.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.Supply Voltage (V CC )...............................................-0.3V to +6V Input VoltagesT IN ..............................................................-0.3V to (V CC - 0.3V)R IN (Except MAX220)........................................................±30V R IN (MAX220).....................................................................±25V T OUT (Except MAX220) (Note 1).......................................±15V T OUT (MAX220)...............................................................±13.2V Output VoltagesT OUT ...................................................................................±15V R OUT .........................................................-0.3V to (V CC + 0.3V)Driver/Receiver Output Short Circuited to GND.........Continuous Continuous Power Dissipation (T A = +70°C)16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 18-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW20-Pin Plastic DIP (derate 8.00mW/°C above +70°C)..440mW 16-Pin Narrow SO (derate 8.70mW/°C above +70°C)...696mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 18-Pin Wide SO (derate 9.52mW/°C above +70°C)......762mW 20-Pin Wide SO (derate 10.00mW/°C above +70°C)....800mW 20-Pin SSOP (derate 8.00mW/°C above +70°C)..........640mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C).....800mW 18-Pin CERDIP (derate 10.53mW/°C above +70°C).....842mW Operating Temperature RangesMAX2_ _AC_ _, MAX2_ _C_ _.............................0°C to +70°C MAX2_ _AE_ _, MAX2_ _E_ _..........................-40°C to +85°C MAX2_ _AM_ _, MAX2_ _M_ _.......................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CMAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________3Note 3:MAX243 R2OUT is guaranteed to be low when R2IN is ≥0V or is floating.ELECTRICAL CHARACTERISTICS—MAX220/222/232A/233A/242/243 (continued)(V= +5V ±10%, C1–C4 = 0.1µF‚ MAX220, C1 = 0.047µF, C2–C4 = 0.33µF, T = T to T ‚ unless otherwise noted.)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 4_________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX220/MAX222/MAX232A/MAX233A/MAX242/MAX243108-1051525OUTPUT VOLTAGE vs. LOAD CURRENT-4-6-8-2642LOAD CURRENT (mA)O U T P U T V O L T A G E (V )1002011104104060AVAILABLE OUTPUT CURRENTvs. DATA RATE65798DATA RATE (kbits/sec)O U T P U T C U R R E N T (m A )203050+10V-10VMAX222/MAX242ON-TIME EXITING SHUTDOWN+5V +5V 0V0V 500µs/div V +, V - V O L T A G E (V )MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________5V CC ...........................................................................-0.3V to +6V V+................................................................(V CC - 0.3V) to +14V V-............................................................................+0.3V to -14V Input VoltagesT IN ............................................................-0.3V to (V CC + 0.3V)R IN ......................................................................................±30V Output VoltagesT OUT ...................................................(V+ + 0.3V) to (V- - 0.3V)R OUT .........................................................-0.3V to (V CC + 0.3V)Short-Circuit Duration, T OUT ......................................Continuous Continuous Power Dissipation (T A = +70°C)14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)....800mW 16-Pin Plastic DIP (derate 10.53mW/°C above +70°C)....842mW 20-Pin Plastic DIP (derate 11.11mW/°C above +70°C)....889mW 24-Pin Narrow Plastic DIP(derate 13.33mW/°C above +70°C)..........1.07W24-Pin Plastic DIP (derate 9.09mW/°C above +70°C)......500mW 16-Pin Wide SO (derate 9.52mW/°C above +70°C).........762mW20-Pin Wide SO (derate 10 00mW/°C above +70°C).......800mW 24-Pin Wide SO (derate 11.76mW/°C above +70°C).......941mW 28-Pin Wide SO (derate 12.50mW/°C above +70°C) .............1W 44-Pin Plastic FP (derate 11.11mW/°C above +70°C).....889mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C)..........727mW 16-Pin CERDIP (derate 10.00mW/°C above +70°C)........800mW 20-Pin CERDIP (derate 11.11mW/°C above +70°C)........889mW 24-Pin Narrow CERDIP(derate 12.50mW/°C above +70°C)..............1W24-Pin Sidebraze (derate 20.0mW/°C above +70°C)..........1.6W 28-Pin SSOP (derate 9.52mW/°C above +70°C).............762mW Operating Temperature RangesMAX2 _ _ C _ _......................................................0°C to +70°C MAX2 _ _ E _ _...................................................-40°C to +85°C MAX2 _ _ M _ _ ...............................................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CABSOLUTE MAXIMUM RATINGS—MAX223/MAX230–MAX241ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)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.M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 6_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS—MAX223/MAX230–MAX241 (continued)(MAX223/230/232/234/236/237/238/240/241, V CC = +5V ±10; MAX233/MAX235, V CC = 5V ±5%‚ C1–C4 = 1.0µF; MAX231/MAX239,V CC = 5V ±10%; V+ = 7.5V to 13.2V; T A = T MIN to T MAX ; unless otherwise noted.)MAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________78.56.54.55.5TRANSMITTER OUTPUT VOLTAGE (V OH ) vs. V CC7.08.0V CC (V)V O H (V )5.07.57.46.02500TRANSMITTER OUTPUT VOLTAGE (V OH )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.46.27.27.0LOAD CAPACITANCE (pF)V O H (V )1500100050020006.86.612.04.02500TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE6.05.011.09.010.0LOAD CAPACITANCE (pF)S L E W R A T E (V /µs )1500100050020008.07.0-6.0-9.04.55.5TRANSMITTER OUTPUT VOLTAGE (V OL ) vs. V CC-8.0-8.5-6.5-7.0V CC (V)V O L (V )5.0-7.5-6.0-7.62500TRANSMITTER OUTPUT VOLTAGE (V OL )vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES-7.0-7.2-7.4-6.2-6.4LOAD CAPACITANCE (pF)V O L (V )150010005002000-6.6-6.810-105101520253035404550TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CURRENT-2-6-4-886CURRENT (mA)V +, V - (V )420__________________________________________Typical Operating CharacteristicsMAX223/MAX230–MAX241*SHUTDOWN POLARITY IS REVERSED FOR NON MAX241 PARTSV+, V- WHEN EXITING SHUTDOWN(1µF CAPACITORS)MAX220-13SHDN*V-O V+500ms/divM A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 8_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGS—MAX225/MAX244–MAX249ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)Note 4:Input voltage measured with transmitter output in a high-impedance state, shutdown, or V CC = 0V.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.Supply Voltage (V CC )...............................................-0.3V to +6V Input VoltagesT IN ‚ ENA , ENB , ENR , ENT , ENRA ,ENRB , ENTA , ENTB ..................................-0.3V to (V CC + 0.3V)R IN .....................................................................................±25V T OUT (Note 3).....................................................................±15V R OUT ........................................................-0.3V to (V CC + 0.3V)Short Circuit (one output at a time)T OUT to GND............................................................Continuous R OUT to GND............................................................ContinuousContinuous Power Dissipation (T A = +70°C)28-Pin Wide SO (derate 12.50mW/°C above +70°C).............1W 40-Pin Plastic DIP (derate 11.11mW/°C above +70°C)...611mW 44-Pin PLCC (derate 13.33mW/°C above +70°C)...........1.07W Operating Temperature RangesMAX225C_ _, MAX24_C_ _ ..................................0°C to +70°C MAX225E_ _, MAX24_E_ _ ...............................-40°C to +85°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering,10sec)..............................+300°CMAX220–MAX249+5V-Powered, Multichannel RS-232Drivers/Receivers_______________________________________________________________________________________9Note 5:The 300Ωminimum specification complies with EIA/TIA-232E, but the actual resistance when in shutdown mode or V CC =0V is 10M Ωas is implied by the leakage specification.ELECTRICAL CHARACTERISTICS—MAX225/MAX244–MAX249 (continued)(MAX225, V CC = 5.0V ±5%; MAX244–MAX249, V CC = +5.0V ±10%, external capacitors C1–C4 = 1µF; T A = T MIN to T MAX ; unless oth-erwise noted.)M A X 220–M A X 249+5V-Powered, Multichannel RS-232Drivers/Receivers 10________________________________________________________________________________________________________________________________Typical Operating CharacteristicsMAX225/MAX244–MAX24918212345TRANSMITTER SLEW RATE vs. LOAD CAPACITANCE86416LOAD CAPACITANCE (nF)T R A N S M I T T E R S L E W R A T E (V /µs )14121010-105101520253035OUTPUT VOLTAGEvs. LOAD CURRENT FOR V+ AND V--2-4-6-88LOAD CURRENT (mA)O U T P U T V O L T A G E (V )64209.05.012345TRANSMITTER OUTPUT VOLTAGE (V+, V-)vs. LOAD CAPACITANCE AT DIFFERENT DATA RATES6.05.58.5LOAD CAPACITANCE (nF)V +, V (V )8.07.57.06.5MAX220–MAX249Drivers/Receivers______________________________________________________________________________________11Figure 1. Transmitter Propagation-Delay Timing Figure 2. Receiver Propagation-Delay TimingFigure 3. Receiver-Output Enable and Disable Timing Figure 4. Transmitter-Output Disable TimingM A X 220–M A X 249Drivers/Receivers 12______________________________________________________________________________________ENT ENR OPERATION STATUS TRANSMITTERSRECEIVERS00Normal Operation All Active All Active 01Normal Operation All Active All 3-State10Shutdown All 3-State All Low-Power Receive Mode 11ShutdownAll 3-StateAll 3-StateTable 1a. MAX245 Control Pin ConfigurationsENT ENR OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All Active RA1–RA4 3-State,RA5 Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll 3-StateAll Low-Power Receive Mode All Low-Power Receive Mode 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RB5 Low-Power Receive ModeTable 1b. MAX245 Control Pin ConfigurationsTable 1c. MAX246 Control Pin ConfigurationsENA ENB OPERATION STATUS TRANSMITTERS RECEIVERSTA1–TA4TB1–TB4RA1–RA5RB1–RB500Normal Operation All Active All Active All Active All Active 01Normal Operation All Active All 3-State All Active RB1–RB4 3-State,RB5 Active 1ShutdownAll 3-StateAll ActiveRA1–RA4 3-State,RA5 Active All Active 11Shutdown All 3-State All 3-StateRA1–RA4 3-State,RA5 Low-Power Receive ModeRB1–RB4 3-State,RA5 Low-Power Receive ModeMAX220–MAX249Drivers/Receivers______________________________________________________________________________________13Table 1d. MAX247/MAX248/MAX249 Control Pin ConfigurationsM A X 220–M A X 249_______________Detailed DescriptionThe MAX220–MAX249 contain four sections: dual charge-pump DC-DC voltage converters, RS-232 dri-vers, RS-232 receivers, and receiver and transmitter enable control inputs.Dual Charge-Pump Voltage ConverterThe MAX220–MAX249 have two internal charge-pumps that convert +5V to ±10V (unloaded) for RS-232 driver operation. The first converter uses capacitor C1 to dou-ble the +5V input to +10V on C3 at the V+ output. The second converter uses capacitor C2 to invert +10V to -10V on C4 at the V- output.A small amount of power may be drawn from the +10V (V+) and -10V (V-) outputs to power external circuitry (see the Typical Operating Characteristics section),except on the MAX225 and MAX245–MAX247, where these pins are not available. V+ and V- are not regulated,so the output voltage drops with increasing load current.Do not load V+ and V- to a point that violates the mini-mum ±5V EIA/TIA-232E driver output voltage when sourcing current from V+ and V- to external circuitry. When using the shutdown feature in the MAX222,MAX225, MAX230, MAX235, MAX236, MAX240,MAX241, and MAX245–MAX249, avoid using V+ and V-to power external circuitry. When these parts are shut down, V- falls to 0V, and V+ falls to +5V. For applica-tions where a +10V external supply is applied to the V+pin (instead of using the internal charge pump to gen-erate +10V), the C1 capacitor must not be installed and the SHDN pin must be tied to V CC . This is because V+is internally connected to V CC in shutdown mode.RS-232 DriversThe typical driver output voltage swing is ±8V when loaded with a nominal 5k ΩRS-232 receiver and V CC =+5V. Output swing is guaranteed to meet the EIA/TIA-232E and V.28 specification, which calls for ±5V mini-mum driver output levels under worst-case conditions.These include a minimum 3k Ωload, V CC = +4.5V, and maximum operating temperature. Unloaded driver out-put voltage ranges from (V+ -1.3V) to (V- +0.5V). Input thresholds are both TTL and CMOS compatible.The inputs of unused drivers can be left unconnected since 400k Ωinput pull-up resistors to V CC are built in (except for the MAX220). The pull-up resistors force the outputs of unused drivers low because all drivers invert.The internal input pull-up resistors typically source 12µA,except in shutdown mode where the pull-ups are dis-abled. Driver outputs turn off and enter a high-imped-ance state—where leakage current is typically microamperes (maximum 25µA)—when in shutdownmode, in three-state mode, or when device power is removed. Outputs can be driven to ±15V. The power-supply current typically drops to 8µA in shutdown mode.The MAX220 does not have pull-up resistors to force the ouputs of the unused drivers low. Connect unused inputs to GND or V CC .The MAX239 has a receiver three-state control line, and the MAX223, MAX225, MAX235, MAX236, MAX240,and MAX241 have both a receiver three-state control line and a low-power shutdown control. Table 2 shows the effects of the shutdown control and receiver three-state control on the receiver outputs.The receiver TTL/CMOS outputs are in a high-imped-ance, three-state mode whenever the three-state enable line is high (for the MAX225/MAX235/MAX236/MAX239–MAX241), and are also high-impedance whenever the shutdown control line is high.When in low-power shutdown mode, the driver outputs are turned off and their leakage current is less than 1µA with the driver output pulled to ground. The driver output leakage remains less than 1µA, even if the transmitter output is backdriven between 0V and (V CC + 6V). Below -0.5V, the transmitter is diode clamped to ground with 1k Ωseries impedance. The transmitter is also zener clamped to approximately V CC + 6V, with a series impedance of 1k Ω.The driver output slew rate is limited to less than 30V/µs as required by the EIA/TIA-232E and V.28 specifica-tions. Typical slew rates are 24V/µs unloaded and 10V/µs loaded with 3Ωand 2500pF.RS-232 ReceiversEIA/TIA-232E and V.28 specifications define a voltage level greater than 3V as a logic 0, so all receivers invert.Input thresholds are set at 0.8V and 2.4V, so receivers respond to TTL level inputs as well as EIA/TIA-232E and V.28 levels.The receiver inputs withstand an input overvoltage up to ±25V and provide input terminating resistors withDrivers/Receivers 14Table 2. Three-State Control of ReceiversMAX220–MAX249Drivers/Receivers______________________________________________________________________________________15nominal 5k Ωvalues. The receivers implement Type 1interpretation of the fault conditions of V.28 and EIA/TIA-232E.The receiver input hysteresis is typically 0.5V with a guaranteed minimum of 0.2V. This produces clear out-put transitions with slow-moving input signals, even with moderate amounts of noise and ringing. The receiver propagation delay is typically 600ns and is independent of input swing direction.Low-Power Receive ModeThe low-power receive-mode feature of the MAX223,MAX242, and MAX245–MAX249 puts the IC into shut-down mode but still allows it to receive information. This is important for applications where systems are periodi-cally awakened to look for activity. Using low-power receive mode, the system can still receive a signal that will activate it on command and prepare it for communi-cation at faster data rates. This operation conserves system power.Negative Threshold—MAX243The MAX243 is pin compatible with the MAX232A, differ-ing only in that RS-232 cable fault protection is removed on one of the two receiver inputs. This means that control lines such as CTS and RTS can either be driven or left floating without interrupting communication. Different cables are not needed to interface with different pieces of equipment.The input threshold of the receiver without cable fault protection is -0.8V rather than +1.4V. Its output goes positive only if the input is connected to a control line that is actively driven negative. If not driven, it defaults to the 0 or “OK to send” state. Normally‚ the MAX243’s other receiver (+1.4V threshold) is used for the data line (TD or RD)‚ while the negative threshold receiver is con-nected to the control line (DTR‚ DTS‚ CTS‚ RTS, etc.). Other members of the RS-232 family implement the optional cable fault protection as specified by EIA/TIA-232E specifications. This means a receiver output goes high whenever its input is driven negative‚ left floating‚or shorted to ground. The high output tells the serial communications IC to stop sending data. To avoid this‚the control lines must either be driven or connected with jumpers to an appropriate positive voltage level.Shutdown—MAX222–MAX242On the MAX222‚ MAX235‚ MAX236‚ MAX240‚ and MAX241‚ all receivers are disabled during shutdown.On the MAX223 and MAX242‚ two receivers continue to operate in a reduced power mode when the chip is in shutdown. Under these conditions‚ the propagation delay increases to about 2.5µs for a high-to-low input transition. When in shutdown, the receiver acts as a CMOS inverter with no hysteresis. The MAX223 and MAX242 also have a receiver output enable input (EN for the MAX242 and EN for the MAX223) that allows receiver output control independent of SHDN (SHDN for MAX241). With all other devices‚ SHDN (SH DN for MAX241) also disables the receiver outputs.The MAX225 provides five transmitters and five receivers‚ while the MAX245 provides ten receivers and eight transmitters. Both devices have separate receiver and transmitter-enable controls. The charge pumps turn off and the devices shut down when a logic high is applied to the ENT input. In this state, the supply cur-rent drops to less than 25µA and the receivers continue to operate in a low-power receive mode. Driver outputs enter a high-impedance state (three-state mode). On the MAX225‚ all five receivers are controlled by the ENR input. On the MAX245‚ eight of the receiver out-puts are controlled by the ENR input‚ while the remain-ing two receivers (RA5 and RB5) are always active.RA1–RA4 and RB1–RB4 are put in a three-state mode when ENR is a logic high.Receiver and Transmitter EnableControl InputsThe MAX225 and MAX245–MAX249 feature transmitter and receiver enable controls.The receivers have three modes of operation: full-speed receive (normal active)‚ three-state (disabled)‚ and low-power receive (enabled receivers continue to function at lower data rates). The receiver enable inputs control the full-speed receive and three-state modes. The transmitters have two modes of operation: full-speed transmit (normal active) and three-state (disabled). The transmitter enable inputs also control the shutdown mode. The device enters shutdown mode when all transmitters are disabled. Enabled receivers function in the low-power receive mode when in shutdown.M A X 220–M A X 249Tables 1a–1d define the control states. The MAX244has no control pins and is not included in these tables. The MAX246 has ten receivers and eight drivers with two control pins, each controlling one side of the device. A logic high at the A-side control input (ENA )causes the four A-side receivers and drivers to go into a three-state mode. Similarly, the B-side control input (ENB ) causes the four B-side drivers and receivers to go into a three-state mode. As in the MAX245, one A-side and one B-side receiver (RA5 and RB5) remain active at all times. The entire device is put into shut-down mode when both the A and B sides are disabled (ENA = ENB = +5V).The MAX247 provides nine receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs each control four drivers. The ninth receiver (RB5) is always active.The device enters shutdown mode with a logic high on both ENTA and ENTB .The MAX248 provides eight receivers and eight drivers with four control pins. The ENRA and ENRB receiver enable inputs each control four receiver outputs. The ENTA and ENTB transmitter enable inputs control four drivers each. This part does not have an always-active receiver. The device enters shutdown mode and trans-mitters go into a three-state mode with a logic high on both ENTA and ENTB .The MAX249 provides ten receivers and six drivers with four control pins. The ENRA and ENRB receiver enable inputs each control five receiver outputs. The ENTA and ENTB transmitter enable inputs control three dri-vers each. There is no always-active receiver. The device enters shutdown mode and transmitters go into a three-state mode with a logic high on both ENTA and ENTB . In shutdown mode, active receivers operate in a low-power receive mode at data rates up to 20kbits/sec.__________Applications InformationFigures 5 through 25 show pin configurations and typi-cal operating circuits. In applications that are sensitive to power-supply noise, V CC should be decoupled to ground with a capacitor of the same value as C1 and C2 connected as close as possible to the device.Drivers/Receivers16______________________________________________________________________________________。
201107三极管丝印MARK检索表对照查询表
N N N N K A D C O N N N N C C C DP D A A C O D D DQ N N DP N B B B N N N DP N A A C O N N A A
SC70 SC59 SOT23 SOT23 SOT23 SOT346 SOT23 SOT346 SOT89 SC70 SC59 SOT23 SOT363 SOT23 SOT323 SOT23 SOT363 SOT23 SOT346 SOT23 SOT346 SOT89 SOT23 SOT323 SC70 SC59 SOT363 SOT23 SOT23 SOT323 SC70 SC59 SOT23 SOT363 SOT346 SOT346 SOT89 SOT23 SOT323 SOT23 SOT323
IRLML5103 PMBTA42 PXTA42 PMBTA42 PMSTA42 BC846U BC846U 2SC4083 MSD1328R BC847A BC847AT BC847A BC847A BC847A BC847A BC847AR FMMT-A43 MMBTA43 PMBTA43 PMSTA43 BC847A BC847AW 2SC4084 BC847B BC847BT BC847B BC847BT BC847BW BC847B BC847B BC847BW BC847BW BC847BR MMBT5550 PMBT5550 PMBT5550 PMST5550 FMBT5550 BC847C BC847CT BC847C BC847CW BC847CW BC847C BC847CW
163 166 179 181 182 183 1A 1A 1Ap 1At 1At 1A1A 1A 1A p1A p1A t1A t1A -1A 1AM 1B 1B 1Bp 1Bt 1Bt 1B1B 1B 1B p1B t1B t1B -1B 1Bs 1Cp 1C 1C 1C 1Cs 1Dp 1Dt 1Dt 1D1D
MAXIM MAX6138 数据手册
General DescriptionThe MAX6138 is a precision, two-terminal shunt mode,bandgap voltage reference available in fixed reverse breakdown voltages of 1.2205V, 2.048V, 2.5V, 3.0V,3.3V, 4.096V, and 5.0V. Ideal for space-critical applica-tions, the MAX6138 is offered in the subminiature 3-pin SC70 surface-mount package (1.8mm X 1.8mm), 50%smaller than comparable devices in SOT23 surface-mount packages.Laser-trimmed resistors ensure precise initial accuracy.With a 25ppm/°C temperature coefficient, the device is offered in three grades of initial accuracy ranging from 0.1% to 0.5%. The MAX6138 has a 60µA to 15mA shunt-current capability with low-dynamic impedance, ensuring stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.The MAX6138 does not require an external stabilizing capacitor while ensuring stability with capacitive loads.The MAX6138 is a higher precision device in a smaller package than the LM4040/LM4050.ApplicationsPortable, Battery-Powered Equipment Notebook Computers Cell PhonesIndustrial Process ControlFeatureso Ultra-Small 3-Pin SC70 Package o 0.1% (max) Initial Accuracyo 25ppm/°C (max) Temperature CoefficientGuaranteed Over -40°C to +85°C Temperature Range o Wide Operating Current Range: 60µA to 15mA o Low 28µV RMS Output Noise (10Hz to 10kHz)o 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V Fixed Reverse Breakdown Voltages o No Output Capacitors Required o Stable with Capacitive LoadsMAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages________________________________________________________________Maxim Integrated Products 1Pin ConfigurationSelector GuideTypical Operating Circuit19-2090; Rev 2; 4/04For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS —MAX6138_12 (1.2205V)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.Reverse Current (cathode to anode)..................................20mA Forward Current (anode to cathode)..................................10mA Continuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.17mW/°C above +70°C) ...........174mWOperating Temperature Range .........................-40°C to +125°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°C0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS —MAX6138_21 (2.048V)ELECTRICAL CHARACTERISTICS —MAX6138_25 (2.5V)(I R = 100µA, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS —MAX6138_30 (3.0V)ELECTRICAL CHARACTERISTICS —MAX6138_33 (3.3V)MAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________5ELECTRICAL CHARACTERISTICS —MAX6138_41 (4.096V)ELECTRICAL CHARACTERISTICS —MAX6138_50 (5.0V)(I R = 100µA, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)MAX MIN MAX MIN Note 3:Guaranteed by design.4.9964.9984.9975.0004.9995.0025.0015.003-4020-20406080MAX6138_50TEMPERATURE DRIFTTEMPERATURE (°C)R E V E R S E V O L T A G E (V )01.51.00.52.02.53.03.54.04.55.05102015MAX6138_12REVERSE VOLTAGE vs. I SHUNTI SHUNT (mA)R E V E R S E V O L T A G E C H A N G E (m V )M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 6_______________________________________________________________________________________Typical Operating Characteristics(I R = 100µA, T A = +25°C, unless otherwise noted.)0214356040206080100REVERSE CHARACTERISTICS AND MINIMUM OPERATING CURRENTREVERSE CURRENT (µA)R E V E R S E V O L T A G E (V)1.22151.22101.22051.22001.2195-4020-20406080MAX6138_12TEMPERATURE DRIFTTEMPERATURE (°C)R E V E R S E V O L T A G E (V )2.48902.49902.48952.50002.49952.50102.50052.5015-4020-20406080MAX6138_25TEMPERATURE DRIFTTEMPERATURE (°C)R E V E R S E V O L T A G E (V )MAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________701.51.00.52.02.53.03.54.04.55.005102015MAX6138_25REVERSE VOLTAGE vs. I SHUNTI SHUNT (mA)R E V E R S E V O L T A G E C H A N G E (m V )1.51.00.52.02.53.03.54.04.55.005102015MAX6138_50REVERSE VOLTAGE vs. I SHUNTI SHUNT (mA)R E V E R S E V O L T A G EC H A N G E (m V )4µs/divMAX6138_12LOAD-TRANSIENT RESPONSE I SHUNT = 100µA ±25µA R L = 48k Ω+25µAV R AC-COUPLED 10mV/divMAX6138 toc08-25µA10µs/divMAX6138_25LOAD-TRANSIENT RESPONSEI SHUNT = 100µA R L = 100k Ω+25µAV R AC-COUPLED 10mV/divMAX6138 toc09-25µATypical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 8_______________________________________________________________________________________40µs/divMAX6138_50LOAD-TRANSIENT RESPONSEI SHUNT = 100µA R L = 100k Ω+25µAV R AC-COUPLED 20mV/div MAX6138 toc10-25µA 10µs/divMAX6138_12LOAD-TRANSIENT RESPONSEI SHUNT = 1mA R L = 10k Ω+250µAV R AC-COUPLED 2.0mV/divMAX6138 toc11-250µA10µs/divMAX6138_25LOAD-TRANSIENT RESPONSEI SHUNT = 1mA R L = 10k Ω+250µAV R AC-COUPLED 10mV/div MAX6138 toc12-250µA40µs/divMAX6138_50LOAD-TRANSIENT RESPONSE+250µAV R AC-COUPLED 2mV/divMAX6138 toc13-250µAI SHUNT = 1mA R L = 10k ΩTypical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)MAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________910µs/divMAX6138_12LOAD-TRANSIENT RESPONSEI SHUNT = 10mA R L = 1k Ω+2.5mAV R AC-COUPLED 100mV/div MAX6138 toc14-2.5mA 10µs/divMAX6138_25LOAD-TRANSIENT RESPONSEI SHUNT = 10mA R L = 1k Ω+2.5mAV R AC-COUPLED 5mV/divMAX6138 toc15-2.5mA40µs/divMAX6138_50LOAD-TRANSIENT RESPONSEI SHUNT = 10mA R L = 1k Ω+2.5mAV R AC-COUPLED 100mV/divMAX6138 toc16-2.5mA200ns/divMAX6138_12STARTUP CHARACTERISTICSI SHUNT = 100µA R S = 30k Ω5VMAX6138 toc171.2VV INVOUT2µs/divMAX6138_25STARTUP CHARACTERISTICSI SHUNT = 100µA R S = 30k Ω05VMAX6138 toc182VV INVOUT100µs/divMAX6138_50STARTUP CHARACTERISTICSI SHUNT = 100µA R S = 16k Ω0V INV OUT5VMAX6138 toc195V10010k 1k100k1MMAX6138_12OUTPUT IMPEDANCE vs. FREQUENCYFREQUENCY (Hz)I M P E D A N C E (Ω)10000.1110100Typical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 10______________________________________________________________________________________Typical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)0.11011001000MAX6138_25OUTPUT IMPEDANCE vs. FREQUENCYFREQUENCY (Hz)I M P E D A N C E (Ω)10000.11101000.11011001000MAX6138_50OUTPUT IMPEDANCE vs. FREQUENCYFREQUENCY (Hz)I M P E D A N C E (Ω)1000.1110110010kMAX6138_12NOISE vs. FREQUENCYMAX6138 toc23FREQUENCY (Hz)N O I S E (n V H z )10,0001001000101k1100101k10kMAX6138_25NOISE vs. FREQUENCYM A X 6138 t o c 24FREQUENCY (Hz)10,0001001000N O I S E (n V /H z )1100101k10kMAX6138_50NOISE vs. FREQUENCYM A X 6138 t o c 25FREQUENCY (Hz)10,0001001000N O I S E (n V /H z )0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages______________________________________________________________________________________11Detailed DescriptionThe MAX6138 shunt reference uses the bandgap prin-ciple to produce a stable, accurate voltage. The device behaves similarly to an ideal zener diode; a fixed volt-age is maintained across its output terminals when biased with 60µA to 15mA of reverse current. The MAX6138 behaves similarly to a silicon diode when biased with forward currents up to 10mA.Figure 3 shows a typical operating circuit. The MAX6138 is ideal for providing a stable reference from a high-voltage power supply.Applications InformationThe MAX6138’s internal pass transistor is used to main-tain a constant output voltage (V SHUNT ) by sinking the necessary amount of current across a source resistor.The source resistance (R S ) is determined from the load current (I LOAD ) range, supply voltage (V S ) variations,V SHUNT , and desired quiescent current.Choose the value of R S when V S is at a minimum and I LOAD is at a maximum. Maintain a minimum I SHUNT of 60µA at all times. The RS value should be large enough to keep I SHUNT less than 15mA for proper regulation when V S is maximum and I LOAD is at a minimum. To prevent damage to the device, I SHUNT should never exceed 20mA.Therefore, the value of R S is bounded by the following equation:[V S(MIN)- V R ] / [60µA + I LOAD(MAX)] > R S >[V S(MAX ) - V R ] / [20mA + I LOAD(MIN)]Choosing a larger resistance minimizes the total power dissipation in the circuit by reducing the shunt current (P D(TOTAL)= V S X I SHUNT ). Provide a safety margin to incorporate the worst-case tolerance of the resistor used. Ensure that the resistor ’s power rating is ade-quate, using the following general power equation:PD R = I SHUNT ✕(V S(MAX)- V SHUNT )Output CapacitanceThe MAX6138 does not require an external capacitor for operational stability and is stable for any output capacitance.Temperature PerformanceThe MAX6138 typically exhibits an output voltage tem-perature coefficient within ±4ppm/°C. The polarity of the temperature coefficient may be different from one device to another; some may have positive coefficients,and others may have negative coefficients.Chip InformationTRANSISTOR COUNT: 70PROCESS: BiCMOSM A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 12______________________________________________________________________________________Ordering InformationMAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown VoltagesMaxi m cannot assume responsi bi li ty for use of any ci rcui try other than ci rcui try enti rely embodi ed i n a Maxi m product. No ci rcui t patent li censes 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 ____________________13©2004 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information。
xr21V1414_ds_en
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • (510) 668-7000 • FAX (510) 668-7017 • XR21V14144-CH FULL-SPEED USB UARTJUNE 2009REV. 1.0.0GENERAL DESCRIPTIONThe XR21V1414 (V1414) is an enhanced 4-channel USB Universal Asynchronous Receiver and Transmitter (UART). The USB interface is fullycompliant to Full Speed USB 2.0 specification thatsupports 12 Mbps USB data transfer rate. The USBinterface also supports USB suspend, resume and remote wakeup operations. The V1414 operates from an internal 48MHz clock therefore no external crystal/oscillator is required like previous generation UARTs. With the fractional baud rate generator, any baud rate can accurately be generated using the internal 48MHz clock.The large 128-byte FIFO and 384-byte RX FIFO of the V1414 helps to optimize the overall data throughput for various applications. The Automatic Transceiver Direction control feature simplifies both the hardware and software for half-duplex RS-485 applications. If required, the multidrop (9-bit) mode with automatic half-duplex transceiver control feature further simplifies typical multidrop RS-485 applications.The V1414 operates from a single 2.97 to 3.63 volt power supply and has 5V tolerant inputs. The V1414 is available in a 48-pin TQFP package.Software drivers for Windows 2000, XP , Vista, andCE, as well as Linux and Mac are supported for theXR21V1414.APPLICATIONS•Portable Appliances•External Converters (dongles)•Battery-Operated Devices•Cellular Data Devices•Factory Automation and Process Controls •Industrial applicationsFEATURES•USB 2.0 Compliant Interface ■Supports 12 Mbps USB full-speed data rate ■Supports USB suspend, resume and remotewakeup operations•Enhanced Features of each UART ■Data rates up to 12 Mbps ■Fractional Baud Rate Generator ■128 byte TX FIFO ■384 byte RX FIFO■7, 8 or 9 data bits, 1 or 2 stop bits■Automatic Hardware (RTS/CTS or DTR/DSR) Flow Control■Automatic Software (Xon/Xoff) Flow Control ■Multidrop mode w/ Auto Half-Duplex Transceiver Control■Multidrop mode w/ Auto TX Enable ■Half-Duplex mode■Sleep Mode with Remote Wake-up ■Selectable GPIO or Modem I/O•Internal 48 MHz clock•Single 2.97-3.63V power supply•5V tolerant inputs•48-pin TQFP package •Virtual COM Port drivers ■Windows 2000, XP and Vista ■Windows CE 4.2, 5.0, 6.0■Linux ■MacXR21V14144-CH FULL-SPEED USB UART REV. 1.0.0F IGURE 1. XR21V1414 B LOCK D IAGRAM Array 2XR21V1414REV. 1.0.04-CH FULL-SPEED USB UART ArrayORDERING INFORMATIONP ART N UMBER P ACKAGE O PERATING T EMPERATURE R ANGE D EVICE S TATUSXR21V1414IM4848-pin TQFP-40°C to +85°C Active3XR21V141444-CH FULL-SPEED USB UARTREV. 1.0.0PIN DESCRIPTIONSPin DescriptionN AME48-QFN P IN #T YPED ESCRIPTIONUART Channel A SignalsRXA31IUART Channel A Receive Data or IR Receive Data. This pin has an inter-nal pull-up resistor. Internal pull-up resistor is not disabled during suspend mode.TXA 30O UART Channel A Transmit Data or IR Transmit Data.GPIOA0/RIA#21I/OGeneral purpose I/O or UART Ring-Indicator input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOA1/CDA#20I/OGeneral purpose I/O or UART Carrier-Detect input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOA2/DSRA#17I/OGeneral purpose I/O or UART Data-Set-Ready input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOA3/DTRA#16I/OGeneral purpose I/O or UART Data-Terminal-Ready output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOA4/CTSA#7I/OGeneral purpose I/O or UART Clear-to-Send input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOA5/RTSA#6I/OGeneral purpose I/O or UART Request-to-Send output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled dur-ing suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.UART Channel B SignalsRXB9IUART Channel B Receive Data or IR Receive Data. This pin has an inter-nal pull-up resistor. Internal pull-up resistor is not disabled during suspend mode.TXB 8O UART Channel B Transmit Data or IR Transmit Data.GPIOB0/RIB#15I/OGeneral purpose I/O or UART Ring-Indicator input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOB1/CDB#14I/OGeneral purpose I/O or UART Carrier-Detect input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.XR21V14145REV. 1.0.04-CH FULL-SPEED USB UARTGPIOB2/DSRB#13I/OGeneral purpose I/O or UART Data-Set-Ready input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOB3/DTRB#12I/OGeneral purpose I/O or UART Data-Terminal-Ready output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOB4/CTSB#11I/OGeneral purpose I/O or UART Clear-to-Send input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOB5/RTSB#10I/OGeneral purpose I/O or UART Request-to-Send output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled dur-ing suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.UART Channel C SignalsRXC23IUART Channel C Receive Data or IR Receive Data. This pin has an inter-nal pull-up resistor. Internal pull-up resistor is not disabled during suspend mode.TXC 22O UART Channel C Transmit Data or IR Transmit Data.GPIOC0/RIC#29I/OGeneral purpose I/O or UART Ring-Indicator input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOC1/CDC#28I/OGeneral purpose I/O or UART Carrier-Detect input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOC2/DSRC#27I/OGeneral purpose I/O or UART Data-Set-Ready input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOC3/DTRC#26I/OGeneral purpose I/O or UART Data-Terminal-Ready output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOC4/CTSC#25I/OGeneral purpose I/O or UART Clear-to-Send input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOC5/RTSC#24I/OGeneral purpose I/O or UART Request-to-Send output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled dur-ing suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.Pin DescriptionN AME48-QFN P IN #T YPE D ESCRIPTIONXR21V141464-CH FULL-SPEED USB UARTREV. 1.0.0UART Channel D SignalsRXD39IUART Channel D Receive Data or IR Receive Data. This pin has an inter-nal pull-up resistor. Internal pull-up resistor is not disabled during suspend mode.TXD 38O UART Channel D Transmit Data or IR Transmit Data.GPIOD0/RID#37I/OGeneral purpose I/O or UART Ring-Indicator input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOD1/CDD#34I/OGeneral purpose I/O or UART Carrier-Detect input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOD2/DSRD#3I/OGeneral purpose I/O or UART Data-Set-Ready input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOD3/DTRD#48I/OGeneral purpose I/O or UART Data-Terminal-Ready output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOD4/CTSD#47I/OGeneral purpose I/O or UART Clear-to-Send input (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled during suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.GPIOD5/RTSD#46I/OGeneral purpose I/O or UART Request-to-Send output (active low). This pin has an internal pull-up resistor. Internal pull-up resistor is disabled dur-ing suspend mode. If using this GPIO as an input, a pull-up resistor is required to minimize the power consumption in the suspend mode.USB Interface SignalsUSBD+43I/O USB port differential data plus. This pin has a 1.5 K Ohm internal pull-up resistor.USBD-42I/OUSB port differential data minus.I2C Interface SignalsSDA35ODI 2C-controller data input/output (open-drain). 1K pull-up resistor isrequired if an EEPROM is connected. An optional external I 2C EEPROM can be used to store default configurations upon power-up including the USB Vendor ID and Device ID.If an EEPROM is not used, this pin can be used with the SCL pin to select the Remote Wake-up and Power modes. An external pull-up or pull-down resistor is required. See Table 1.Pin DescriptionN AME48-QFN P IN #T YPED ESCRIPTIONXR21V14147REV. 1.0.04-CH FULL-SPEED USB UARTN OTE : Pin type: I=Input, O=Output, I/O= Input/output, OD=Output Open Drain.SCL36II 2C-controller serial input clock. 1K pull-up resistor is required if anEEPROM is connected. An optional external I 2C EEPROM can be used to store default configurations upon power-up including the USB Vendor ID and Device ID.If an EEPROM is not used, this pin can be used with the SDA pin to select the Remote Wake-up and Power modes. An external pull-up or pull-down resistor is required. See Table 1.Ancillary SignalsLOWPOWER2OLow power status output. This pin is HIGH when the XR21V1414 is in the suspend mode. This pin is LOW when the XR21V1414 is not in the sus-pend mode. An external pull-up or pull-down resistor is required on this pin. This pin is sampled upon power-on to configure the polarity of the LOWPOWER output during suspend mode. An external pull-up resistor will cause the LOWPOWER pin to be HIGH during suspend mode. An external pull-down resistor will cause the LOWPOWER pin to be LOW dur-ing suspend mode.VCC 5, 18, 33, 44, 45Pwr +3.3V power supply. All inputs are 5V tolerant.GND1, 4, 19, 32, 40, 41PwrPower supply common, ground.Pin DescriptionN AME 48-QFN P IN #T YPE D ESCRIPTIONXR21V141484-CH FULL-SPEED USB UARTREV. 1.0.01.0FUNCTIONAL DESCRIPTIONS 1.1USB interfaceThe USB interface of the V1414 is compliant with the USB 2.0 Full-Speed Specifications. The USB configuration model presented by the V1414 to the device driver is compatible to the Abstract Control Model of the USB Communication Device Class (CDC-ACM). The V1414 uses the following set of parameters:•1 Control Endpoint■Endpoint 0 as outlined in the USB specifications•1 Configuration is supported •2 interfaces per UART channel■Each UART channel has a single interrupt endpoint ■Each UART channel have bulk-in and bulk-out endpoints1.1.1USB Vendor IDExar’s USB Vendor ID is 0x04E2. This is the default Vendor ID that is used for the V1414 unless a valid EEPROM is present on the I2C interface signals. If a valid EEPROM is present, the Vendor ID from the EEPROM will be used.1.1.2USB Product IDThe default USB Product ID for the V1414 is 0x1414. If a valid EEPROM is present, the Product ID from the EEPROM will be used.1.2I2C InterfaceThe I2C interface provides connectivity to an external I2C memory device (i.e. EEPROM) that can be read by the V1414 for configuration.The SDA and SCL are used to specify whether Remote Wakeup and/or Bus Powered configurations are to be supported. These pins are sampled at power-up. The following table describes how Remote Wakeup and Bus Powered support.T ABLE 1: R EMOTE W AKEUP AND P OWER M ODESR EMOTE W AKE -UPS UPPORTP OWER M ODE C OMMENTS11No Self-Powered Default, if no EEPROM is present10No Bus-Powered 01Yes Self-Powered 0YesBus-PoweredSDA SCLXR21V14149REV. 1.0.04-CH FULL-SPEED USB UART1.2.1EEPROM ContentsThe I2C address should be 0xA0. An EEPROM can be used to override default Vendor IDs and Device IDs, as well as other attributes and maximum power consumption. The EEPROM must contain 8 bytes of data as specified in Table 2T ABLE 2: EEPROM C ONTENTSA DDRESSC ONTENTS 0Vendor ID (LSB)1Vendor ID (MSB)2Product ID (LSB)3Product ID (MSB)4Device Attributes 5Device Maximum Power6Reserved7Signature of 0x58 (’X’). If the signature is not correct, the contents of the EEPROM are ignored.These values are uploaded from the EEPROM to the corresponding USB Standard Device Descriptor or Standard Configuration Descriptor. For details of the USB Descriptors, refer to the USB 2.0 specifications.1.2.1.1Vendor IDThe Vendor ID value replaces the idVendor field in the USB Standard Device Descriptor. 1.2.1.2Product IDThe Product ID value replaces the idProduct field in the USB Standard Device Descriptor.1.2.1.3Device AttributesThe Device Attributes value replaces the bmAttributes field in the USB Standard Configuration Descriptor. 1.2.1.4Device Maximum PowerThe Device Maximum Power value replaces the bMaxPower field in the USB Standard Configuration Descriptor.1.3UART ManagerThe UART Manager enables/disables each UART including the TX and RX FIFOs for each UART. The UART Manager is located in a separate register block from the 4 UART channels. 1.4UARTThere are 4 enhanced UART channels in the V1414. Each UART channel is independent, therefore, they will need to be initialized and configured independently. Each UART can be configured via USB control transfers from the USB host. 1.4.1TransmitterThe transmitter consists of a 128-byte TX FIFO and a Transmit Shift Register (TSR). Once a bulk-out packet has been received and the CRC has been validated, the data bytes in that packet are written into the TX FIFO of the specified UART channel. Data from the TX FIFO is transferred to the TSR when the TSR is idle or has completed sending the previous data byte. The TSR shifts the data out onto the TX output pin at the data rate defined by the CLOCK_DIVISOR and TX_CLOCK_MASK registers. The transmitter sends the start bit followed by the data bits (starting with the LSB), inserts the proper parity-bit if enabled, and adds the stop-bit(s). The transmitter can be configured for 7 or 8 data bits with parity or 9 data bits with no parity.EEPROMXR21V1414104-CH FULL-SPEED USB UARTREV. 1.0.01.4.1.19-Bit Data ModeIn 9-bit data mode, two bytes of data must be written. The first byte that is loaded into the TX FIFO are the first 8 bits (data bits 7-0) of the 9-bit data. Bit-0 of the second byte that is loaded into the TX FIFO is bit-8 of the 9-bit data. The data that is transmitted on the TX pin is as follows: start bit, 9-bit data, stop bit. 1.4.2ReceiverThe receiver consists of a 384-byte RX FIFO and a Receive Shift Register (RSR). Data that is received in the RSR via the RX pin is transferred into the RX FIFO along with any error tags such as Framing, Parity, Break and Overrun errors. Data from the RX FIFO can be sent to the USB host by sending a bulk-in packet. 1.4.2.1Character ModeIn character mode, up to 64 bytes of data can be sent at a time to the USB host. 1.4.2.2Character + Status ModeIn this mode, each 8-bit character and the 4 error bits associated with it can be transmitted to the USB host. The 4 error bits will be in the second byte following the 8-bit character. In this mode, up to 32 character bytes are sent per bulk-in packet.1.4.2.39-Bit Data ModeIn 9-bit data mode, two bytes of data are sent to the USB host for each byte 9-bit data that is received. The first byte sent to the USB host is the first 8-bits of data. Bit-0 of the second byte is the bit-9 of the data. 1.4.3GPIOEach UART has 6 GPIOs. By default, the GPIOs are general purpose I/Os. However, there are few modes that can be enabled to add additional feature such as Auto RTS/CTS Flow control, Auto DTR/DSR Flow Control or Transceiver Enable Control. See Table 13. 1.4.4Automatic RTS/CTS Hardware Flow ControlGPIO5 and GPIO4 of the UART channel can be enabled as the RTS# and CTS# signals for Auto RTS/CTS flow control when GPIO_MODE[2:0] = ’001’ and FLOW_CONTROL[2:0] = ’001’. Automatic RTS flow control is used to prevent data overrun errors in local RX FIFO by de-asserting the RTS signal to the remote UART. When there is room in the RX FIFO, the RTS pin will be re-asserted. Automatic CTS flow control is used to prevent data overrun to the remote RX FIFO. The CTS# input is monitored to suspend/restart the local transmitter (see Figure 3):F IGURE 3. A UTO RTS AND CTS F LOW C ONTROL O PERATION1.4.5Automatic DTR/DSR Hardware Flow ControlAuto DTR/DSR hardware flow control behaves the same as the Auto RTS/CTS hardware flow control described above except that it uses the DTR# and DSR# signals. For Auto hardware flow control, FLOW_CONTROL[2:0] = ’001’. GPIO3 and GPIO2 become DTR# and DSR#, respectively, when GPIO_MODE[2:0] = ’010’.1.4.6Automatic XON/XOFF Software Flow ControlWhen software flow control is enabled, the V1414 compares the receive data characters with the programmed Xon or Xoff characters. If the received character matches the programmed Xoff character, the V1414 will halt transmission as soon as the current character has completed transmission. Data transmission is resumed when a received character matches the Xon character. Software flow control is enabled when FLOW_CONTROL[2:0] = ’010’.1.4.7Multidrop Mode with Automatic Half-Duplex Transceiver ControlMultidrop mode with Automatic Half-Duplex Transceiver Control is enabled when GPIO_MODE[2:0] = ’011’ and FLOW_CONTROL[2:0] = ’011’.1.4.7.1ReceiverIn this mode, the UART Receiver will automatically be enabled when an address byte (9th bit or parity bit is ’1’) is received that matches the value stored in the XON_CHAR or XOFF_CHAR register. The address byte will not be loaded into the RX FIFO. All subsequent data bytes will be loaded into the RX FIFO. The UART Receiver will automatically be disabled when an address byte is received that does not match the values in the XON_CHAR or XOFF_CHAR register.1.4.7.2TransmitterGPIO5/RTS# pin behaves as control pin for the direction of a half-duplex RS-485 transceiver. The polarity of the GPIO5/RTS# pin can be configured via GPIO_MODE[3]. When the UART is not transmitting data, the GPIO5/RTS# pin will be de-asserted. The GPIO5/RTS# pin will be asserted immediately before the UART starts transmitting data. When the UART is done transmitting data, the GPIO5/RTS# pin will be de-asserted.1.4.8Multidrop Mode with Automatic Transmitter EnableMultidrop mode with Automatic Transmitter Enable is enabled when GPIO_MODE[2:0] = ’100’ and FLOW_CONTROL[2:0] = ’100’.1.4.8.1ReceiverThe behavior of the receiver is the same in this mode as it is in the Address Match mode described above.1.4.8.2TransmitterWhen there is an address match with the XON_CHAR register, the GPIO5/RTS# pin is asserted and remains asserted whether the UART is transmitting data or not. The GPIO5/RTS# pin will be de-asserted when an address byte is received that does not match the value in the XON_CHAR register. The polarity of the GPIO5/ RTS# pin can be configured via GPIO_MODE[3].1.4.9Programmable Turn-Around DelayBy default, the GPIO5/RTS# pin will be de-asserted immediately after the stop bit of the last byte has been shifted. However, this may not be ideal for systems where the signal needs to propagate over long cables. Therefore, the de-assertion of GPIO5/RTS# pin can be delayed from 1 to 15 bit times via the XCVR_EN_DELAY register to allow for the data to reach distant UARTs.1.4.10Half-Duplex ModeHalf-duplex mode is enabled when FLOW_CONTROL[3] = 1. In this mode, the UART will ignore any data on the RX input when the UART is transmitting data.2.0USB CONTROL COMMANDSThe following table shows all of the USB Control Commands that are supported by the V1414. Commands included are standard USB commands, CDC-ACM commands and custom Exar commands. .T ABLE 3: S UPPORTED USB C ONTROL C OMMANDSN AME R EQUESTT YPER EQUEST V ALUE I NDEX L ENGTH D ESCRIPTIONDEV GET_STATUS0x800000020Device: remote wake-up +self-poweredIF GET_STATUS0x810001-4,129-132020Interface: zeroEP GET_STATUS0x820000-4,129-136020Endpoint: haltedDEV CLEAR_FEATURE0x001100000Device remote wake-upEP CLEAR_FEATURE0x021000-4,129-136000Endpoint haltDEV SET_FEATURE0x0031000000Device remote wake-up DEV SET_FEATURE0x003200test00Test modeEP SET_FEATURE0x023000-4,129-136000Endpoint haltSET_ADDRESS0x005addr00000GET_DESCRIPTOR0x8060100lenLSBlenMSBDevice descriptorGET_DESCRIPTOR0x8060200lenLSBlenMSBConfiguration descriptorGET_CONFIGURATION0x808000010 SET_CONFIGURATION0x009n00000 GET_INTERFACE0x8110000-7010CDC_ACM_IF SET_LINE_CODING 0x2132000, 2,4, 6070Set the UART baud rate,parity, stop bits, etc.CDC_ACM_IF GET_LINE_CODING 0xA133000, 2,4, 6070Get the UART baud rate,parity, stop bits, etc.CDC_ACM_IFSET_CONTROL_LINE_STATE 0x2134val00, 2,4, 6000Set UART control lines2.1UART Block NumbersThe table below lists the block numbers for accessing each of the UART channels and the UART Manager..T ABLE 4: C ONTROL B LOCKSB LOCK N AME B LOCK N UMBERD ESCRIPTIONUART Channel A 0The configuration and control registers for UART channel A.UART Channel B 1The configuration and control registers for UART channel B.UART Channel C 2The configuration and control registers for UART channel C.UART Channel D 3The configuration and control registers for UART channel D.UART Manager4The control registers for the UART Manager. The UART Manager enables/disables the TX and RX FIFOs for each UART.CDC_ACM_IF SEND_BREAK 0x2135val LSB val MSB 0, 2, 4, 600Send a break for the speci-fied duration XR_SET_REG0x40valregis-terblock 0Exar custom command: setone 8-bit register val: 8-bit register value register address: seeTable 6 on page 16block number: see Table 4on page 14XR_GETN_REG0xC01regis-terblock count LSB countMSB Exar custom register: getcount 8-bit registers register address: seeTable 6 on page 16block number: see Table 4on page 14T ABLE 3: S UPPORTED USB C ONTROL C OMMANDSN AME R EQUESTT YPE R EQUESTV ALUE I NDEX L ENGTH D ESCRIPTION3.0REGISTER SET DESCRIPTIONThe internal register set of the V1414 consists of 2 different types of registers: UART Manager and UART registers. The UART Manager controls the TX, RX and FIFOs of all UART channels. The UART registers configure and control the remaining UART channel functionality not related to the UART FIFO.3.1UART Manager Registers..T ABLE 5: UART M ANAGER R EGISTERSA DDRESS R EGISTER N AMEB IT-7B IT-6B IT-5B IT-4B IT-3B IT-2B IT-1B IT-00X10FIFO_ENABLE_CHA000000RX TX0X11FIFO_ENABLE_CHB000000RX TX0X12FIFO_ENABLE_CHC000000RX TX 0x13FIFO_ENABLE_CHD000000RX TX0X18RX_FIFO_RESET_CHA Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-00X19RX_FIFO_RESET_CHB Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-00x1A RX_FIFO_RESET_CHC Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-00x1B RX_FIFO_RESET_CHD Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-00x1C TX_FIFO_RESET_CHA Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-00x1D TX_FIFO_RESET_CHB Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-00x1E TX_FIFO_RESET_CHC Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-00x1F TX_FIFO_RESET_CHD Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-0 FIFO_ENABLE RegistersEnables the RX FIFO and TX FIFOs. For proper functionality, the UART TX and RX must be enabled in the following order:FIFO_ENABLE_CHx = 0x1// Enable TX FIFOUART_ENABLE = 0x3// Enable TX and RX of that channelFIFO_ENABLE_CHx = 0x3// Enable RX FIFORX_FIFO_RESET and TX_FIFO_RESET RegistersWriting a non-zero value to these registers resets the FIFOs.3.2UART Register MapT ABLE 6: UART R EGISTERSA DDRESS R EGISTER N AMEB IT-7B IT-6B IT-5B IT-4B IT-3B IT-2B IT-1B IT-0 0X00Reserved00000000 0X01Reserved00000000 0X02Reserved00000000 0X03UART_ENABLE000000RX TX 0X04CLOCK_DIVISOR0Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-0 0x05CLOCK_DIVISOR1Bit-15Bit-14Bit-13Bit-12Bit-11Bit-10Bit-9Bit-8 0x06CLOCK_DIVISOR200000Bit-18Bit-17Bit-16 0x07TX_CLOCK_MASK0Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-0 0x08TX_CLOCK_MASK1Bit-15Bit-14Bit-13Bit-12Bit-11Bit-10Bit-9Bit-8 0x09RX_CLOCK_MASK0Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-0 0x0A RX_CLOCK_MASK1Bit-15Bit-14Bit-13Bit-12Bit-11Bit-10Bit-9Bit-8 0x0B CHARACTER_FORMAT Stop Parity Data Bits0x0C FLOW_CONTROL0000Half-DuplexFlow Control Mode Select0x0D Reserved00000000 0x0E Reserved00000000 0x0F Reserved00000000 0x10XON_CHAR Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-0 0x11XOFF_CHAR Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-0 0x12Reserved000000000x13ERROR_STATUS BreakStatus OverrunErrorParityErrorFramingErrorBreakError0000x14TX_BREAK Bit-7Bit-6Bit-5Bit-4Bit-3Bit-2Bit-1Bit-0 0x15XCVR_EN_DELAY0000Delay0x16Reserved00000000 0x17Reserved00000000 0x18Reserved00000000 0x19Reserved000000000x1A GPIO_MODE0000XCVREnablePolarityMode Select0x1B GPIO_DIRECTION00GPIO5GPIO4GPIO3GPIO2GPIO1GPIO0 0x1D GPIO_SET00GPIO5GPIO4GPIO3GPIO2GPIO1GPIO0 0x1E GPIO_CLEAR00GPIO5GPIO4GPIO3GPIO2GPIO1GPIO0 0x1F GPIO_STATUS00GPIO5GPIO4GPIO3GPIO2GPIO1GPIO0。
完整word版串行接口8位LED显示驱动器
串行接口 8位LED 显示驱动器一、 概述MAX7219/MAX7221是一种集成化的串行输入/输出共阴极显示驱动器，它连接微处理器 与8位数字的7段数字LED 显示，也可以连接条线图显示器或者 64个独立的LED 。
其上包括一 个片上的B 型BCD 编码器、多路扫描回路，段字驱动器，而且还有一个 8*8的静态RAM 用来存 储每一个数据。
只有一个外部寄存器用来设置各个 LED 的段电流。
MAX7221与SPI?、QSPI? 以及MICROWIRE?相兼容，同时它有限制回转电流的段驱动来减少 EMI (电磁干扰)。
一个方便的四线串行接口可以联接所有通用的微处理器。
每个数据可以寻址在更新时不需 要改写所有的显示。
MAX7219/MAX7221同样允许用户对每一个数据选择编码或者不编码。
整个设备包含一个150 uA 的低功耗关闭模式，模拟和数字亮度控制，一个扫描限制寄存 器允许用户显示1-8位数据，还有一个让所有LED 发光的检测模式。
在应用时要求3V 的操作电压或segment blinking ，可以查阅MAX6951数据资料。
二、 应用条线图显示 仪表面板 工业控制 三、 管脚配置TOPVFW()WAX7221OHLY四、 功能特点10M H 旌续串行口 独立的LED 段控制 数字的译码与非译码选择 150 uA 的低功耗关闭模式 亮度的数字和模拟控制 高电压中断显示 共阴极LED 显示驱动限制回转电流的段驱动来减少SPI, QSPI, MICROWIRE 串行接口( MAX7221 ) 24脚的DIP 和SO 封装五、 分类信息LED 矩阵显示 叵叵叵叵区叵叵叵叵叵叵叵NO4D6237DS E G & N & G & & N 6 DDGDDDDGDDOUT SE&D SEG DPSEGC(SET SEGG SE&e SEGF SEGA CLKDIP/SOEMI MAX7221串行数据输出端口，从 DIN 输入的数据在16.5个时 钟周期后在此端有效。
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General DescriptionThe MAX6138 is a precision, two-terminal shunt mode,bandgap voltage reference available in fixed reverse breakdown voltages of 1.2205V, 2.048V, 2.5V, 3.0V,3.3V, 4.096V, and 5.0V. Ideal for space-critical applica-tions, the MAX6138 is offered in the subminiature 3-pin SC70 surface-mount package (1.8mm X 1.8mm), 50%smaller than comparable devices in SOT23 surface-mount packages.Laser-trimmed resistors ensure precise initial accuracy.With a 25ppm/°C temperature coefficient, the device is offered in three grades of initial accuracy ranging from 0.1% to 0.5%. The MAX6138 has a 60µA to 15mA shunt-current capability with low-dynamic impedance, ensuring stable reverse breakdown voltage accuracy over a wide range of operating temperatures and currents.The MAX6138 does not require an external stabilizing capacitor while ensuring stability with capacitive loads.The MAX6138 is a higher precision device in a smaller package than the LM4040/LM4050.ApplicationsPortable, Battery-Powered Equipment Notebook Computers Cell PhonesIndustrial Process ControlFeatureso Ultra-Small 3-Pin SC70 Package o 0.1% (max) Initial Accuracyo 25ppm/°C (max) Temperature CoefficientGuaranteed Over -40°C to +85°C Temperature Range o Wide Operating Current Range: 60µA to 15mA o Low 28µV RMS Output Noise (10Hz to 10kHz)o 1.2205V, 2.048V, 2.5V, 3.0V, 3.3V, 4.096V, and 5.0V Fixed Reverse Breakdown Voltages o No Output Capacitors Required o Stable with Capacitive LoadsMAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages________________________________________________________________Maxim Integrated Products 1Pin ConfigurationSelector GuideTypical Operating Circuit19-2090; Rev 2; 4/04For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS —MAX6138_12 (1.2205V)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.Reverse Current (cathode to anode)..................................20mA Forward Current (anode to cathode)..................................10mA Continuous Power Dissipation (T A = +70°C)3-Pin SC70 (derate 2.17mW/°C above +70°C) ...........174mWOperating Temperature Range .........................-40°C to +125°C Storage Temperature Range.............................-65°C to +150°C Junction Temperature......................................................+150°C Lead Temperature (soldering, 10s).................................+300°C0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS —MAX6138_21 (2.048V)ELECTRICAL CHARACTERISTICS —MAX6138_25 (2.5V)(I R = 100µA, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS —MAX6138_30 (3.0V)ELECTRICAL CHARACTERISTICS —MAX6138_33 (3.3V)MAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________5ELECTRICAL CHARACTERISTICS —MAX6138_41 (4.096V)ELECTRICAL CHARACTERISTICS —MAX6138_50 (5.0V)(I R = 100µA, T A = -40°C to +85°C, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)MAX MIN MAX MIN Note 3:Guaranteed by design.4.9964.9984.9975.0004.9995.0025.0015.003-4020-20406080MAX6138_50TEMPERATURE DRIFTTEMPERATURE (°C)R E V E R S E V O L T A G E (V )01.51.00.52.02.53.03.54.04.55.05102015MAX6138_12REVERSE VOLTAGE vs. I SHUNTI SHUNT (mA)R E V E R S E V O L T A G E C H A N G E (m V )M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 6_______________________________________________________________________________________Typical Operating Characteristics(I R = 100µA, T A = +25°C, unless otherwise noted.)214356040206080100REVERSE CHARACTERISTICS AND MINIMUM OPERATING CURRENTREVERSE CURRENT (µA)R E V E R S E V O L T A G E (V)1.22151.22101.22051.22001.2195-4020-20406080MAX6138_12TEMPERATURE DRIFTTEMPERATURE (°C)R E V E R S E V O L T A G E (V )2.48902.49902.48952.50002.49952.50102.50052.5015-4020-20406080MAX6138_25TEMPERATURE DRIFTTEMPERATURE (°C)R E V E R S E V O L T A G E (V )MAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________701.51.00.52.02.53.03.54.04.55.005102015MAX6138_25REVERSE VOLTAGE vs. I SHUNTI SHUNT (mA)R E V E R S E V O L T A G E C H A N G E (m V )1.51.00.52.02.53.03.54.04.55.005102015MAX6138_50REVERSE VOLTAGE vs. I SHUNTI SHUNT (mA)R E V E R S E V O L T A GE C H A N G E (m V )4µs/divMAX6138_12LOAD-TRANSIENT RESPONSE I SHUNT = 100µA ±25µA R L = 48k Ω+25µAV R AC-COUPLED 10mV/div MAX6138 toc08-25µA10µs/divMAX6138_25LOAD-TRANSIENT RESPONSEI SHUNT = 100µA R L = 100k Ω+25µAV R AC-COUPLED 10mV/divMAX6138 toc09-25µATypical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 8_______________________________________________________________________________________40µs/divMAX6138_50LOAD-TRANSIENT RESPONSEI SHUNT = 100µA R L = 100k Ω+25µAV R AC-COUPLED 20mV/div MAX6138 toc10-25µA 10µs/divMAX6138_12LOAD-TRANSIENT RESPONSEI SHUNT = 1mA R L = 10k Ω+250µAV R AC-COUPLED 2.0mV/divMAX6138 toc11-250µA10µs/divMAX6138_25LOAD-TRANSIENT RESPONSEI SHUNT = 1mA R L = 10k Ω+250µAV R AC-COUPLED 10mV/div MAX6138 toc12-250µA40µs/divMAX6138_50LOAD-TRANSIENT RESPONSE+250µAV R AC-COUPLED 2mV/divMAX6138 toc13-250µAI SHUNT = 1mA R L = 10k ΩTypical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)MAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages_______________________________________________________________________________________910µs/divMAX6138_12LOAD-TRANSIENT RESPONSEI SHUNT = 10mA R L = 1k Ω+2.5mAV R AC-COUPLED 100mV/div MAX6138 toc14-2.5mA 10µs/divMAX6138_25LOAD-TRANSIENT RESPONSEI SHUNT = 10mA R L = 1k Ω+2.5mAV R AC-COUPLED 5mV/divMAX6138 toc15-2.5mA40µs/divMAX6138_50LOAD-TRANSIENT RESPONSEI SHUNT = 10mA R L = 1k Ω+2.5mAV R AC-COUPLED 100mV/divMAX6138 toc16-2.5mA200ns/divMAX6138_12STARTUP CHARACTERISTICSI SHUNT = 100µA R S = 30k Ω5VMAX6138 toc171.2VV INVOUT2µs/divMAX6138_25STARTUP CHARACTERISTICSI SHUNT = 100µA R S = 30k Ω05VMAX6138 toc182VV INVOUT100µs/divMAX6138_50STARTUP CHARACTERISTICSI SHUNT = 100µA R S = 16k Ω0V INV OUT5VMAX6138 toc195V10010k 1k100k1MMAX6138_12OUTPUT IMPEDANCE vs. FREQUENCYFREQUENCY (Hz)I M P E D A N C E (Ω)10000.1110100Typical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)M A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 10______________________________________________________________________________________Typical Operating Characteristics (continued)(I R = 100µA, T A = +25°C, unless otherwise noted.)0.11011001000MAX6138_25OUTPUT IMPEDANCE vs. FREQUENCYFREQUENCY (Hz)I M P E D A N C E (Ω)10000.11101000.11011001000MAX6138_50OUTPUT IMPEDANCE vs. FREQUENCYFREQUENCY (Hz)I M P E D A N C E (Ω)1000.1110110010kMAX6138_12NOISE vs. FREQUENCYMAX6138 toc23FREQUENCY (Hz)N O I S E (n V H z )10,0001001000101k1100101k10kMAX6138_25NOISE vs. FREQUENCYM A X 6138 t o c 24FREQUENCY (Hz)10,0001001000N O I S E (n V /H z )1100101k10kMAX6138_50NOISE vs. FREQUENCYM A X 6138 t o c 25FREQUENCY (Hz)10,0001001000N O I S E (n V /H z )0.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages______________________________________________________________________________________11Detailed DescriptionThe MAX6138 shunt reference uses the bandgap prin-ciple to produce a stable, accurate voltage. The device behaves similarly to an ideal zener diode; a fixed volt-age is maintained across its output terminals when biased with 60µA to 15mA of reverse current. The MAX6138 behaves similarly to a silicon diode when biased with forward currents up to 10mA.Figure 3 shows a typical operating circuit. The MAX6138 is ideal for providing a stable reference from a high-voltage power supply.Applications InformationThe MAX6138’s internal pass transistor is used to main-tain a constant output voltage (V SHUNT ) by sinking the necessary amount of current across a source resistor.The source resistance (R S ) is determined from the load current (I LOAD ) range, supply voltage (V S ) variations,V SHUNT , and desired quiescent current.Choose the value of R S when V S is at a minimum and I LOAD is at a maximum. Maintain a minimum I SHUNT of 60µA at all times. The RS value should be large enough to keep I SHUNT less than 15mA for proper regulation when V S is maximum and I LOAD is at a minimum. To prevent damage to the device, I SHUNT should never exceed 20mA.Therefore, the value of R S is bounded by the following equation:[V S(MIN)- V R ] / [60µA + I LOAD(MAX)] > R S >[V S(MAX ) - V R ] / [20mA + I LOAD(MIN)]Choosing a larger resistance minimizes the total power dissipation in the circuit by reducing the shunt current (P D(TOTAL)= V S X I SHUNT ). Provide a safety margin to incorporate the worst-case tolerance of the resistor used. Ensure that the resistor ’s power rating is ade-quate, using the following general power equation:PD R = I SHUNT ✕(V S(MAX)- V SHUNT )Output CapacitanceThe MAX6138 does not require an external capacitor for operational stability and is stable for any output capacitance.Temperature PerformanceThe MAX6138 typically exhibits an output voltage tem-perature coefficient within ±4ppm/°C. The polarity of the temperature coefficient may be different from one device to another; some may have positive coefficients,and others may have negative coefficients.Chip InformationTRANSISTOR COUNT: 70PROCESS: BiCMOSM A X 61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown Voltages 12______________________________________________________________________________________Ordering InformationMAX61380.1%, 25ppm, SC70 Shunt Voltage Reference with Multiple Reverse Breakdown VoltagesMaxi m cannot assume responsi bi li ty for use of any ci rcui try other than ci rcui try enti rely embodi ed i n a Maxi m product. No ci rcui t patent li censes 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 ____________________13©2004 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information。