MAX4865LEUT-T中文资料
MAX1856EUB-T中文资料
Wide Input Range, Synchronizable, PWM SLIC Power Supply MAX1856
ABSOLUTE MAXIMUM RATINGS
VCC, SYNC/SHDN to GND .....................................-0.3V to +30V PGND to GND .......................................................-0.3V to +0.3V LDO, FREQ, FB, CS to GND.....................................-0.3V to +6V EXT, REF to GND......................................-0.3V to (VLDO + 0.3V) LDO Output Current............................................-1mA to +20mA LDO Short Circuit to GND ...............................................<100ms REF Short Circuit to GND ...........................................Continuous Continuous Power Dissipation (TA = +70°C) 10-Pin µMAX (derate 5.6mW/°C above +70°C) ...........444mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C
MAX485中文资料
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_______________________________概述MAX481、MAX483、MAX485、MAX487-MAX491以及MAX1487是用于RS-485与RS-422通信的低功耗收发器，每个器件中都具有一个驱动器和一个接收器。
MAX483、MAX487、MAX488以及MAX489具有限摆率驱动器，可以减小EMI ，并降低由不恰当的终端匹配电缆引起的反射，实现最高250k b p s 的无差错数据传输。
M A X 481、MAX485、MAX490、MAX491、MAX1487的驱动器摆率不受限制，可以实现最高2.5Mbps 的传输速率。
这些收发器在驱动器禁用的空载或满载状态下，吸取的电源电流在120(A 至500(A 之间。
另外，MAX481、MAX483与MAX487具有低电流关断模式，仅消耗0.1µA 。
所有器件都工作在5V 单电源下。
驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。
接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。
MAX487与MAX1487具有四分之一单位负载的接收器输入阻抗，使得总线上最多可以有128个M A X 487/MAX1487收发器。
使用MAX488-MAX491可以实现全双工通信，而MAX481、MAX483、MAX485、MAX487与MAX1487则为半双工应用设计。
_______________________________应用低功耗RS-485收发器低功耗RS-422收发器电平转换器用于EMI 敏感应用的收发器工业控制局域网____________________下一代器件的特性♦容错应用MAX3430: ±80V 故障保护、失效保护、1/4单位负载、+3.3V 、RS-485收发器MAX3440E-MAX3444E: ±15kV ESD 保护、±60V 故障保护、10Mbps 、失效保护、RS-485/J1708收发器♦对于空间受限应用MAX3460-MAX3464: +5V 、失效保护、20Mbps 、Profibus RS-485/RS-422收发器MAX3362: +3.3V 、高速、RS-485/RS-422收发器，采用SOT23封装MAX3280E-MAX3284E: ±15kV ESD 保护、52Mbps 、+3V 至+5.5V 、SOT23、RS-485/RS-422、真失效保护接收器MAX3293/MAX3294/MAX3295: 20Mbps 、+3.3V 、SOT23、RS-485/RS-422发送器♦对于多通道收发器应用MAX3030E-MAX3033E: ±15kV ESD 保护、+3.3V 、四路RS-422发送器♦对于失效保护应用MAX3080-MAX3089: 失效保护、高速(10Mbps)、限摆率RS-485/RS-422收发器♦对于低电压应用MAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V 供电、±15kV ESD 保护、12Mbps 、限摆率、真正的RS-485/RS-422收发器MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487低功耗、限摆率、RS-485/RS-422收发器_____________________________________________________________________选择表19-0122; Rev 8; 10/03定购信息在本资料的最后给出。
MAX491MJD中文资料
For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .General DescriptionThe MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables,thus allowing error-free data transmission up to 250kbps.The driver slew rates of the MAX481, MAX485, MAX490,MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps.These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. Additionally, the MAX481, MAX483, and MAX487have a low-current shutdown mode in which they consume only 0.1µA. All parts operate from a single 5V supply.Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-imped-ance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.The MAX487 and MAX1487 feature quarter-unit-load receiver input impedance, allowing up to 128 MAX487/MAX1487 transceivers on the bus. Full-duplex communi-cations are obtained using the MAX488–MAX491, while the MAX481, MAX483, MAX485, MAX487, and MAX1487are designed for half-duplex applications.________________________ApplicationsLow-Power RS-485 Transceivers Low-Power RS-422 Transceivers Level TranslatorsTransceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks__Next Generation Device Features♦For Fault-Tolerant ApplicationsMAX3430: ±80V Fault-Protected, Fail-Safe, 1/4Unit Load, +3.3V, RS-485 TransceiverMAX3440E–MAX3444E: ±15kV ESD-Protected,±60V Fault-Protected, 10Mbps, Fail-Safe, RS-485/J1708 Transceivers♦For Space-Constrained ApplicationsMAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,Profibus RS-485/RS-422 TransceiversMAX3362: +3.3V, High-Speed, RS-485/RS-422Transceiver in a SOT23 PackageMAX3280E–MAX3284E: ±15kV ESD-Protected,52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422,True Fail-Safe ReceiversMAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,SOT23, RS-855/RS-422 Transmitters ♦For Multiple Transceiver ApplicationsMAX3030E–MAX3033E: ±15kV ESD-Protected,+3.3V, Quad RS-422 Transmitters ♦For Fail-Safe ApplicationsMAX3080–MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422Transceivers♦For Low-Voltage ApplicationsMAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited,True RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________Selection Table19-0122; Rev 8; 10/03Ordering Information appears at end of data sheet.M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSSupply Voltage (V CC ).............................................................12V Control Input Voltage (RE , DE)...................-0.5V to (V CC + 0.5V)Driver Input Voltage (DI).............................-0.5V to (V CC + 0.5V)Driver Output Voltage (A, B)...................................-8V to +12.5V Receiver Input Voltage (A, B).................................-8V to +12.5V Receiver Output Voltage (RO).....................-0.5V to (V CC +0.5V)Continuous Power Dissipation (T A = +70°C)8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)....727mW 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)..800mW 8-Pin SO (derate 5.88mW/°C above +70°C).................471mW14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW 8-Pin µMAX (derate 4.1mW/°C above +70°C)..............830mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C).......727mW Operating Temperature RangesMAX4_ _C_ _/MAX1487C_ A...............................0°C to +70°C MAX4__E_ _/MAX1487E_ A.............................-40°C to +85°C MAX4__MJ_/MAX1487MJA...........................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CDC ELECTRICAL CHARACTERISTICS(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)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.V V IN = -7VV IN = 12V V IN = -7V V IN = 12V Input Current (A, B)I IN2V TH k Ω48-7V ≤V CM ≤12V, MAX487/MAX1487R INReceiver Input Resistance -7V ≤V CM ≤12V, all devices except MAX487/MAX1487R = 27Ω(RS-485), Figure 40.4V ≤V O ≤2.4VR = 50Ω(RS-422)I O = 4mA, V ID = -200mV I O = -4mA, V ID = 200mV V CM = 0V-7V ≤V CM ≤12V DE, DI, RE DE, DI, RE MAX487/MAX1487,DE = 0V, V CC = 0V or 5.25VDE, DI, RE R = 27Ωor 50Ω, Figure 4R = 27Ωor 50Ω, Figure 4R = 27Ωor 50Ω, Figure 4DE = 0V;V CC = 0V or 5.25V,all devices except MAX487/MAX1487CONDITIONSk Ω12µA ±1I OZRThree-State (high impedance)Output Current at ReceiverV 0.4V OL Receiver Output Low Voltage 3.5V OH Receiver Output High Voltage mV 70∆V TH Receiver Input Hysteresis V -0.20.2Receiver Differential Threshold Voltage-0.2mA 0.25mA-0.81.01.55V OD2Differential Driver Output (with load)V 2V 5V OD1Differential Driver Output (no load)µA±2I IN1Input CurrentV 0.8V IL Input Low Voltage V 2.0V IH Input High Voltage V 0.2∆V OD Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States V 0.2∆V OD Change in Magnitude of Driver Differential Output Voltage for Complementary Output States V 3V OC Driver Common-Mode Output VoltageUNITS MINTYPMAX SYMBOL PARAMETERMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________3SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)DC ELECTRICAL CHARACTERISTICS (continued)(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)ns 103060t PHLDriver Rise or Fall Time Figures 6 and 8, R DIFF = 54Ω, C L1= C L2= 100pF ns MAX490M, MAX491M MAX490C/E, MAX491C/E2090150MAX481, MAX485, MAX1487MAX490M, MAX491MMAX490C/E, MAX491C/E MAX481, MAX485, MAX1487Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pF MAX481 (Note 5)Figures 5 and 11, C RL = 15pF, S2 closedFigures 5 and 11, C RL = 15pF, S1 closed Figures 5 and 11, C RL = 15pF, S2 closed Figures 5 and 11, C RL = 15pF, S1 closed Figures 6 and 10, R DIFF = 54Ω,C L1= C L2= 100pFFigures 6 and 8,R DIFF = 54Ω,C L1= C L2= 100pF Figures 6 and 10,R DIFF = 54Ω,C L1= C L2= 100pF CONDITIONS ns 510t SKEW ns50200600t SHDNTime to ShutdownMbps 2.5f MAX Maximum Data Rate ns 2050t HZ Receiver Disable Time from High ns 103060t PLH 2050t LZ Receiver Disable Time from Low ns 2050t ZH Driver Input to Output Receiver Enable to Output High ns 2050t ZL Receiver Enable to Output Low 2090200ns ns 134070t HZ t SKD Driver Disable Time from High |t PLH - t PHL |DifferentialReceiver Skewns 4070t LZ Driver Disable Time from Low ns 4070t ZL Driver Enable to Output Low 31540ns51525ns 31540t R , t F 2090200Driver Output Skew to Output t PLH , t PHL Receiver Input to Output4070t ZH Driver Enable to Output High UNITS MIN TYP MAX SYMBOL PARAMETERFigures 7 and 9, C L = 100pF, S2 closed Figures 7 and 9, C L = 100pF, S1 closed Figures 7 and 9, C L = 15pF, S1 closed Figures 7 and 9, C L = 15pF, S2 closedM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 4_______________________________________________________________________________________SWITCHING CHARACTERISTICS—MAX483, MAX487/MAX488/MAX489(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued)(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)3001000Figures 7 and 9, C L = 100pF, S2 closed Figures 7 and 9, C L = 100pF, S1 closed Figures 5 and 11, C L = 15pF, S2 closed,A - B = 2VCONDITIONSns 40100t ZH(SHDN)Driver Enable from Shutdown toOutput High (MAX481)nsFigures 5 and 11, C L = 15pF, S1 closed,B - A = 2Vt ZL(SHDN)Receiver Enable from Shutdownto Output Low (MAX481)ns 40100t ZL(SHDN)Driver Enable from Shutdown toOutput Low (MAX481)ns 3001000t ZH(SHDN)Receiver Enable from Shutdownto Output High (MAX481)UNITS MINTYP MAX SYMBOLPARAMETERt PLH t SKEW Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pFt PHL Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pFDriver Input to Output Driver Output Skew to Output ns 100800ns ns 2000MAX483/MAX487, Figures 7 and 9,C L = 100pF, S2 closedt ZH(SHDN)Driver Enable from Shutdown to Output High2502000ns2500MAX483/MAX487, Figures 5 and 11,C L = 15pF, S1 closedt ZL(SHDN)Receiver Enable from Shutdown to Output Lowns 2500MAX483/MAX487, Figures 5 and 11,C L = 15pF, S2 closedt ZH(SHDN)Receiver Enable from Shutdown to Output Highns 2000MAX483/MAX487, Figures 7 and 9,C L = 100pF, S1 closedt ZL(SHDN)Driver Enable from Shutdown to Output Lowns 50200600MAX483/MAX487 (Note 5) t SHDN Time to Shutdownt PHL t PLH , t PHL < 50% of data period Figures 5 and 11, C RL = 15pF, S2 closed Figures 5 and 11, C RL = 15pF, S1 closed Figures 5 and 11, C RL = 15pF, S2 closed Figures 5 and 11, C RL = 15pF, S1 closed Figures 7 and 9, C L = 15pF, S2 closed Figures 6 and 10, R DIFF = 54Ω,C L1= C L2= 100pFFigures 7 and 9, C L = 15pF, S1 closed Figures 7 and 9, C L = 100pF, S1 closed Figures 7 and 9, C L = 100pF, S2 closed CONDITIONSkbps 250f MAX 2508002000Maximum Data Rate ns 2050t HZ Receiver Disable Time from High ns 25080020002050t LZ Receiver Disable Time from Low ns 2050t ZH Receiver Enable to Output High ns 2050t ZL Receiver Enable to Output Low ns ns 1003003000t HZ t SKD Driver Disable Time from High I t PLH - t PHL I DifferentialReceiver SkewFigures 6 and 10, R DIFF = 54Ω,C L1= C L2= 100pFns 3003000t LZ Driver Disable Time from Low ns 2502000t ZL Driver Enable to Output Low ns Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pFns 2502000t R , t F 2502000Driver Rise or Fall Time ns t PLH Receiver Input to Output2502000t ZH Driver Enable to Output High UNITS MIN TYP MAX SYMBOL PARAMETERMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________530002.5OUTPUT CURRENT vs.RECEIVER OUTPUT LOW VOLTAGE525M A X 481-01OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )1.515100.51.02.0203540450.90.1-50-252575RECEIVER OUTPUT LOW VOLTAGE vs.TEMPERATURE0.30.7TEMPERATURE (°C)O U T P U TL O W V O L T A G E (V )500.50.80.20.60.40100125-20-41.5 2.0 3.0 5.0OUTPUT CURRENT vs.RECEIVER OUTPUT HIGH VOLTAGE-8-16M A X 481-02OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )2.5 4.0-12-18-6-14-10-203.54.5 4.83.2-50-252575RECEIVER OUTPUT HIGH VOLTAGE vs.TEMPERATURE3.64.4TEMPERATURE (°C)O U T P UT H I G H V O L T A G E (V )0504.04.63.44.23.83.01001259000 1.0 3.0 4.5DRIVER OUTPUT CURRENT vs.DIFFERENTIAL OUTPUT VOLTAGE1070M A X 481-05DIFFERENTIAL OUTPUT VOLTAGE (V)O U T P U T C U R R E N T (m A )2.0 4.05030806040200.5 1.5 2.53.5 2.31.5-50-2525125DRIVER DIFFERENTIAL OUTPUT VOLTAGEvs. TEMPERATURE1.72.1TEMPERATURE (°C)D I F FE R E N T I A L O U T P U T V O L T A G E (V )751.92.21.62.01.8100502.4__________________________________________Typical Operating Characteristics(V CC = 5V, T A = +25°C, unless otherwise noted.)NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICSNote 1:All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to deviceground unless otherwise specified.Note 2:All typical specifications are given for V CC = 5V and T A = +25°C.Note 3:Supply current specification is valid for loaded transmitters when DE = 0V.Note 4:Applies to peak current. See Typical Operating Characteristics.Note 5:The MAX481/MAX483/MAX487 are put into shutdown by bringing RE high and DE low. If the inputs are in this state for lessthan 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See Low-Power Shutdown Mode section.M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 6___________________________________________________________________________________________________________________Typical Operating Characteristics (continued)(V CC = 5V, T A = +25°C, unless otherwise noted.)120008OUTPUT CURRENT vs.DRIVER OUTPUT LOW VOLTAGE20100M A X 481-07OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )6604024801012140-1200-7-5-15OUTPUT CURRENT vs.DRIVER OUTPUT HIGH VOLTAGE-20-80M A X 481-08OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )-31-603-6-4-2024-100-40100-40-60-2040100120MAX1487SUPPLY CURRENT vs. TEMPERATURE300TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )20608050020060040000140100-50-2550100MAX481/MAX485/MAX490/MAX491SUPPLY CURRENT vs. TEMPERATURE300TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )257550020060040000125100-50-2550100MAX483/MAX487–MAX489SUPPLY CURRENT vs. TEMPERATURE300TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )257550020060040000125MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________7______________________________________________________________Pin DescriptionFigure 1. MAX481/MAX483/MAX485/MAX487/MAX1487 Pin Configuration and Typical Operating CircuitM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487__________Applications InformationThe MAX481/MAX483/MAX485/MAX487–MAX491 and MAX1487 are low-power transceivers for RS-485 and RS-422 communications. The MAX481, MAX485, MAX490,MAX491, and MAX1487 can transmit and receive at data rates up to 2.5Mbps, while the MAX483, MAX487,MAX488, and MAX489 are specified for data rates up to 250kbps. The MAX488–MAX491 are full-duplex trans-ceivers while the MAX481, MAX483, MAX485, MAX487,and MAX1487 are half-duplex. In addition, Driver Enable (DE) and Receiver Enable (RE) pins are included on the MAX481, MAX483, MAX485, MAX487, MAX489,MAX491, and MAX1487. When disabled, the driver and receiver outputs are high impedance.MAX487/MAX1487:128 Transceivers on the BusThe 48k Ω, 1/4-unit-load receiver input impedance of the MAX487 and MAX1487 allows up to 128 transceivers on a bus, compared to the 1-unit load (12k Ωinput impedance) of standard RS-485 drivers (32 trans-ceivers maximum). Any combination of MAX487/MAX1487 and other RS-485 transceivers with a total of 32 unit loads or less can be put on the bus. The MAX481/MAX483/MAX485 and MAX488–MAX491 have standard 12k ΩReceiver Input impedance.Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 8_______________________________________________________________________________________Figure 2. MAX488/MAX490 Pin Configuration and Typical Operating CircuitFigure 3. MAX489/MAX491 Pin Configuration and Typical Operating CircuitMAX483/MAX487/MAX488/MAX489:Reduced EMI and ReflectionsThe MAX483 and MAX487–MAX489 are slew-rate limit-ed, minimizing EMI and reducing reflections caused by improperly terminated cables. Figure 12 shows the dri-ver output waveform and its Fourier analysis of a 150kHz signal transmitted by a MAX481, MAX485,MAX490, MAX491, or MAX1487. High-frequency har-monics with large amplitudes are evident. Figure 13shows the same information displayed for a MAX483,MAX487, MAX488, or MAX489 transmitting under the same conditions. Figure 13’s high-frequency harmonics have much lower amplitudes, and the potential for EMI is significantly reduced.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________9_________________________________________________________________Test CircuitsFigure 4. Driver DC Test Load Figure 5. Receiver Timing Test LoadFigure 6. Driver/Receiver Timing Test Circuit Figure 7. Driver Timing Test LoadM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 10_______________________________________________________Switching Waveforms_________________Function Tables (MAX481/MAX483/MAX485/MAX487/MAX1487)Figure 8. Driver Propagation DelaysFigure 9. Driver Enable and Disable Times (except MAX488 and MAX490)Figure 10. Receiver Propagation DelaysFigure 11. Receiver Enable and Disable Times (except MAX488and MAX490)Table 1. TransmittingTable 2. ReceivingLow-Power Shutdown Mode (MAX481/MAX483/MAX487)A low-power shutdown mode is initiated by bringing both RE high and DE low. The devices will not shut down unless both the driver and receiver are disabled.In shutdown, the devices typically draw only 0.1µA of supply current.RE and DE may be driven simultaneously; the parts are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 600ns, the parts are guaranteed to enter shutdown.For the MAX481, MAX483, and MAX487, the t ZH and t ZL enable times assume the part was not in the low-power shutdown state (the MAX485/MAX488–MAX491and MAX1487 can not be shut down). The t ZH(SHDN)and t ZL(SHDN)enable times assume the parts were shut down (see Electrical Characteristics ).It takes the drivers and receivers longer to become enabled from the low-power shutdown state (t ZH(SHDN ), t ZL(SHDN)) than from the operating mode (t ZH , t ZL ). (The parts are in operating mode if the –R —E –,DE inputs equal a logical 0,1 or 1,1 or 0, 0.)Driver Output ProtectionExcessive output current and power dissipation caused by faults or by bus contention are prevented by two mechanisms. A foldback current limit on the output stage provides immediate protection against short cir-cuits over the whole common-mode voltage range (see Typical Operating Characteristics ). In addition, a ther-mal shutdown circuit forces the driver outputs into a high-impedance state if the die temperature rises excessively.Propagation DelayMany digital encoding schemes depend on the differ-ence between the driver and receiver propagation delay times. Typical propagation delays are shown in Figures 15–18 using Figure 14’s test circuit.The difference in receiver delay times, | t PLH - t PHL |, is typically under 13ns for the MAX481, MAX485,MAX490, MAX491, and MAX1487 and is typically less than 100ns for the MAX483 and MAX487–MAX489.The driver skew times are typically 5ns (10ns max) for the MAX481, MAX485, MAX490, MAX491, and MAX1487, and are typically 100ns (800ns max) for the MAX483 and MAX487–MAX489.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________1110dB/div0Hz5MHz500kHz/div10dB/div0Hz5MHz500kHz/divFigure 12. Driver Output Waveform and FFT Plot of MAX481/MAX485/MAX490/MAX491/MAX1487 Transmitting a 150kHz SignalFigure 13. Driver Output Waveform and FFT Plot of MAX483/MAX487–MAX489 Transmitting a 150kHz SignalM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 12______________________________________________________________________________________V CC = 5V T A = +25°CV CC = 5V T A = +25°CV CC = 5V T A = +25°CV CC = 5V T A = +25°CFigure 14. Receiver Propagation Delay Test CircuitFigure 15. MAX481/MAX485/MAX490/MAX491/MAX1487Receiver t PHLFigure 16. MAX481/MAX485/MAX490/MAX491/MAX1487Receiver t PLHPHL Figure 18. MAX483, MAX487–MAX489 Receiver t PLHLine Length vs. Data RateThe RS-485/RS-422 standard covers line lengths up to 4000 feet. For line lengths greater than 4000 feet, see Figure 23.Figures 19 and 20 show the system differential voltage for the parts driving 4000 feet of 26AWG twisted-pair wire at 110kHz into 120Ωloads.Typical ApplicationsThe MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 transceivers are designed for bidirectional data communications on multipoint bus transmission lines.Figures 21 and 22 show typical network applications circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet, as shown in Figure 23.To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possi-ble. The slew-rate-limited MAX483 and MAX487–MAX489are more tolerant of imperfect termination.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________13DIV Y -V ZRO5V 0V1V0V -1V5V 0V2µs/divFigure 19. MAX481/MAX485/MAX490/MAX491/MAX1487 System Differential Voltage at 110kHz Driving 4000ft of Cable Figure 20. MAX483, MAX487–MAX489 System Differential Voltage at 110kHz Driving 4000ft of CableFigure 21. MAX481/MAX483/MAX485/MAX487/MAX1487 Typical Half-Duplex RS-485 NetworkM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 14______________________________________________________________________________________Figure 22. MAX488–MAX491 Full-Duplex RS-485 NetworkFigure 23. Line Repeater for MAX488–MAX491Isolated RS-485For isolated RS-485 applications, see the MAX253 and MAX1480 data sheets.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________15_______________Ordering Information_________________Chip TopographiesMAX481/MAX483/MAX485/MAX487/MAX1487N.C. RO 0.054"(1.372mm)0.080"(2.032mm)DE DIGND B N.C.V CCARE * Contact factory for dice specifications.__Ordering Information (continued)M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 16______________________________________________________________________________________TRANSISTOR COUNT: 248SUBSTRATE CONNECTED TO GNDMAX488/MAX490B RO 0.054"(1.372mm)0.080"(2.032mm)N.C. DIGND Z A V CCYN.C._____________________________________________Chip Topographies (continued)MAX489/MAX491B RO 0.054"(1.372mm)0.080"(2.032mm)DE DIGND Z A V CCYREMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________17Package 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 .)S O I C N .E P SM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 18______________________________________________________________________________________Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)MAX481/MAX483/MAX485/MAX487–MAX491Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________19©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487P D I P N .E PSPackage Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)。
MAX5435LEZT-T中文资料
R (kΩ) 50 50 100 100 50
PKG CODE T833-1 T833-1 T833-1 T833-1 Z6-1
________________________________________________________________ Maxim Integrated Products 1
The MAX5432–MAX5435 feature an internal, nonvolatile, electrically erasable programmable read-only memory (EEPROM) that returns the wiper to its previously stored position at power-up. The fast-mode I2C-compatible serial interface allows communication at data rates up to 400kbps, minimizing board space and reducing interconnection complexity. Each device is available with multiple factory-preset I2C addresses (see the Ordering Information/Selector Guide).
MAX5432–MAX5435
32-Tap, Nonvolatile, I2C, Linear, Digital Potentiometers
ABSOLUTE MAXIMUM RATINGS
max485esa中文资料
General DescriptionThe MAX481, MAX483, MAX485, MAX487–MAX491, andMAX1487 are low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and onereceiver. The MAX483, MAX487, MAX488, and MAX489feature reduced slew-rate drivers that minimize E MI andreduce reflections caused by improperly terminated cables,thus allowing error-free data transmission up to 250kbps.The driver slew rates of the MAX481, MAX485, MAX490,MAX491, and MAX1487 are not limited, allowing them totransmit up to 2.5Mbps.These transceivers draw between 120µA and 500µA ofsupply current when unloaded or fully loaded with disableddrivers. Additionally, the MAX481, MAX483, and MAX487have a low-current shutdown mode in which they consumeonly 0.1µA. All parts operate from a single 5V supply.Drivers are short-circuit current limited and are protectedagainst excessive power dissipation by thermal shutdowncircuitry that places the driver outputs into a high-imped-ance state. The receiver input has a fail-safe feature thatguarantees a logic-high output if the input is open circuit.The MAX487 and MAX1487 feature quarter-unit-loadreceiver input impedance, allowing up to 128 MAX487/MAX1487 transceivers on the bus. Full-duplex communi-cations are obtained using the MAX488–MAX491, whilethe MAX481, MAX483, MAX485, MAX487, and MAX1487are designed for half-duplex applications.________________________Applications Low-Power RS-485 Transceivers Low-Power RS-422 Transceivers Level Translators Transceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks__Next Generation Device Features o For Fault-Tolerant Applications MAX3430: ±80V Fault-Protected, Fail-Safe, 1/4Unit Load, +3.3V, RS-485 Transceiver MAX3440E–MAX3444E: ±15kV ESD-Protected,±60V Fault-Protected, 10Mbps, Fail-Safe, RS-485/J1708 Transceivers o For Space-Constrained Applications MAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,Profibus RS-485/RS-422 Transceivers MAX3362: +3.3V, High-Speed, RS-485/RS-422Transceiver in a SOT23 Package MAX3280E–MAX3284E: ±15kV ESD-Protected,52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422,True Fail-Safe Receivers MAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,SOT23, RS-485/RS-422 Transmitters o For Multiple Transceiver Applications MAX3030E–MAX3033E: ±15kV ESD-Protected,+3.3V, Quad RS-422 Transmitters o For Fail-Safe Applications MAX3080–MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422Transceiverso For Low-Voltage ApplicationsMAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V Powered, ±15kVESD-Protected, 12Mbps, Slew-Rate-Limited,True RS-485/RS-422 Transceivers For pricing, delivery, and ordering information, please contact Maxim Direct at1-888-629-4642, or visit Maxim Integrated’s website at .______________________________________________________________Selection Table19-0122; Rev 10; 9/14PARTNUMBERHALF/FULL DUPLEX DATA RATE (Mbps) SLEW-RATE LIMITED LOW-POWER SHUTDOWN RECEIVER/DRIVER ENABLE QUIESCENT CURRENT (μA) NUMBER OF RECEIVERS ON BUS PIN COUNT MAX481Half 2.5No Yes Yes 300328MAX483Half 0.25Yes Yes Yes 120328MAX485Half 2.5No No Yes 300328MAX487Half 0.25Yes Yes Yes 1201288MAX488Full 0.25Yes No No 120328MAX489Full 0.25Yes No Yes 1203214MAX490Full 2.5No No No 300328MAX491Full 2.5No No Yes 3003214MAX1487 Half 2.5No No Yes 2301288Ordering Information appears at end of data sheet.找电子元器件上宇航军工MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-LimitedRS-485/RS-422 TransceiversPackage Information For the latest package outline information and land patterns, go to . Note that a “+”, “#”, or “-”in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.16Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-100017©2014 Maxim Integrated Products, Inc.Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.。
MEMORY存储芯片MAX3490EESA+T中文规格书
Figure 1. MAX3483/MAX3485/MAX3486 Pin Configuration and Typical Operating Circuit Figure 2. MAX3488/MAX3490 Pin Configuration and Typical Operating Circuit Figure 3. MAX3491 Pin Configuration and Typical Operating CircuitMAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX34913.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 TransceiversDriver Output ProtectionExcessive output current and power dissipation caused by faults or by bus contention are prevented by two mechanisms. A foldback current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range (see Typical Operating Characteristics ). In addition, a thermal shut-down circuit forces the driver outputs into a high-impedance state if the die temperature rises excessively.Propagation Delay Figures 15–18 show the typical propagation delays. Skew time is simply the difference between the low-to-high and high-to-low propagation delay. Small driver/receiver skew times help maintain a symmetrical mark-space ratio (50% duty cycle).The receiver skew time, |t PRLH - t PRHL |, is under 10ns (20ns for the MAX3483/MAX3488). The driver skew times are 8ns for the MAX3485/MAX3490/MAX3491, 11ns for the MAX3486, and typically under 100ns for the MAX3483/MAX3488.Line Length vs. Data Rate The RS-485/RS-422 standard covers line lengths up to 4000 feet. For line lengths greater than 4000 feet, see Figure 23.Figures 19 and 20 show the system differential voltage for parts driving 4000 feet of 26AWG twisted-pair wire at 125kHz into 120Ω loads.Typical ApplicationsThe MAX3483, MAX3485, MAX3486, MAX3488, MAX3490, and MAX3491 transceivers are designed for bidirectional data communications on multipoint bus transmission lines. Figures 21 and 22 show typical net-work applications circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet, as shown in Figure 23.To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as pos-sible. The slew-rate-limited MAX3483/MAX3488 and the partially slew-rate-limited MAX3486 are more tolerant of imperfect termination.Figure 21. MAX3483/MAX3485/MAX3486 Typical RS-485 NetworkMAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX34913.3V-Powered, 10Mbps and Slew-Rate-Limited True RS-485/RS-422 Transceivers。
MAX490ESA+T中文资料
For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .General DescriptionThe MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 are low-power transceivers for RS-485 and RS-422 communication. Each part contains one driver and one receiver. The MAX483, MAX487, MAX488, and MAX489feature reduced slew-rate drivers that minimize EMI and reduce reflections caused by improperly terminated cables,thus allowing error-free data transmission up to 250kbps.The driver slew rates of the MAX481, MAX485, MAX490,MAX491, and MAX1487 are not limited, allowing them to transmit up to 2.5Mbps.These transceivers draw between 120µA and 500µA of supply current when unloaded or fully loaded with disabled drivers. Additionally, the MAX481, MAX483, and MAX487have a low-current shutdown mode in which they consume only 0.1µA. All parts operate from a single 5V supply.Drivers are short-circuit current limited and are protected against excessive power dissipation by thermal shutdown circuitry that places the driver outputs into a high-imped-ance state. The receiver input has a fail-safe feature that guarantees a logic-high output if the input is open circuit.The MAX487 and MAX1487 feature quarter-unit-load receiver input impedance, allowing up to 128 MAX487/MAX1487 transceivers on the bus. Full-duplex communi-cations are obtained using the MAX488–MAX491, while the MAX481, MAX483, MAX485, MAX487, and MAX1487are designed for half-duplex applications.________________________ApplicationsLow-Power RS-485 Transceivers Low-Power RS-422 Transceivers Level TranslatorsTransceivers for EMI-Sensitive Applications Industrial-Control Local Area Networks__Next Generation Device Features♦For Fault-Tolerant ApplicationsMAX3430: ±80V Fault-Protected, Fail-Safe, 1/4Unit Load, +3.3V, RS-485 TransceiverMAX3440E–MAX3444E: ±15kV ESD-Protected,±60V Fault-Protected, 10Mbps, Fail-Safe, RS-485/J1708 Transceivers♦For Space-Constrained ApplicationsMAX3460–MAX3464: +5V, Fail-Safe, 20Mbps,Profibus RS-485/RS-422 TransceiversMAX3362: +3.3V, High-Speed, RS-485/RS-422Transceiver in a SOT23 PackageMAX3280E–MAX3284E: ±15kV ESD-Protected,52Mbps, +3V to +5.5V, SOT23, RS-485/RS-422,True Fail-Safe ReceiversMAX3293/MAX3294/MAX3295: 20Mbps, +3.3V,SOT23, RS-855/RS-422 Transmitters ♦For Multiple Transceiver ApplicationsMAX3030E–MAX3033E: ±15kV ESD-Protected,+3.3V, Quad RS-422 Transmitters ♦For Fail-Safe ApplicationsMAX3080–MAX3089: Fail-Safe, High-Speed (10Mbps), Slew-Rate-Limited RS-485/RS-422Transceivers♦For Low-Voltage ApplicationsMAX3483E/MAX3485E/MAX3486E/MAX3488E/MAX3490E/MAX3491E: +3.3V Powered, ±15kV ESD-Protected, 12Mbps, Slew-Rate-Limited,True RS-485/RS-422 TransceiversMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________Selection Table19-0122; Rev 8; 10/03Ordering Information appears at end of data sheet.M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 2_______________________________________________________________________________________ABSOLUTE MAXIMUM RATINGSSupply Voltage (V CC ).............................................................12V Control Input Voltage (RE , DE)...................-0.5V to (V CC + 0.5V)Driver Input Voltage (DI).............................-0.5V to (V CC + 0.5V)Driver Output Voltage (A, B)...................................-8V to +12.5V Receiver Input Voltage (A, B).................................-8V to +12.5V Receiver Output Voltage (RO).....................-0.5V to (V CC +0.5V)Continuous Power Dissipation (T A = +70°C)8-Pin Plastic DIP (derate 9.09mW/°C above +70°C)....727mW 14-Pin Plastic DIP (derate 10.00mW/°C above +70°C)..800mW 8-Pin SO (derate 5.88mW/°C above +70°C).................471mW14-Pin SO (derate 8.33mW/°C above +70°C)...............667mW 8-Pin µMAX (derate 4.1mW/°C above +70°C)..............830mW 8-Pin CERDIP (derate 8.00mW/°C above +70°C).........640mW 14-Pin CERDIP (derate 9.09mW/°C above +70°C).......727mW Operating Temperature RangesMAX4_ _C_ _/MAX1487C_ A...............................0°C to +70°C MAX4__E_ _/MAX1487E_ A.............................-40°C to +85°C MAX4__MJ_/MAX1487MJA...........................-55°C to +125°C Storage Temperature Range.............................-65°C to +160°C Lead Temperature (soldering, 10sec).............................+300°CDC ELECTRICAL CHARACTERISTICS(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)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.V V IN = -7VV IN = 12V V IN = -7V V IN = 12V Input Current (A, B)I IN2V TH k Ω48-7V ≤V CM ≤12V, MAX487/MAX1487R INReceiver Input Resistance -7V ≤V CM ≤12V, all devices except MAX487/MAX1487R = 27Ω(RS-485), Figure 40.4V ≤V O ≤2.4VR = 50Ω(RS-422)I O = 4mA, V ID = -200mV I O = -4mA, V ID = 200mV V CM = 0V-7V ≤V CM ≤12V DE, DI, RE DE, DI, RE MAX487/MAX1487,DE = 0V, V CC = 0V or 5.25VDE, DI, RE R = 27Ωor 50Ω, Figure 4R = 27Ωor 50Ω, Figure 4R = 27Ωor 50Ω, Figure 4DE = 0V;V CC = 0V or 5.25V,all devices except MAX487/MAX1487CONDITIONSk Ω12µA ±1I OZRThree-State (high impedance)Output Current at ReceiverV 0.4V OL Receiver Output Low Voltage 3.5V OH Receiver Output High Voltage mV 70∆V TH Receiver Input Hysteresis V -0.20.2Receiver Differential Threshold Voltage-0.2mA 0.25mA-0.81.01.55V OD2Differential Driver Output (with load)V 2V 5V OD1Differential Driver Output (no load)µA±2I IN1Input CurrentV 0.8V IL Input Low Voltage V 2.0V IH Input High Voltage V 0.2∆V OD Change in Magnitude of Driver Common-Mode Output Voltage for Complementary Output States V 0.2∆V OD Change in Magnitude of Driver Differential Output Voltage for Complementary Output States V 3V OC Driver Common-Mode Output VoltageUNITS MINTYPMAX SYMBOL PARAMETERMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________3SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)DC ELECTRICAL CHARACTERISTICS (continued)(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)ns 103060t PHLDriver Rise or Fall Time Figures 6 and 8, R DIFF = 54Ω, C L1= C L2= 100pF ns MAX490M, MAX491M MAX490C/E, MAX491C/E2090150MAX481, MAX485, MAX1487MAX490M, MAX491MMAX490C/E, MAX491C/E MAX481, MAX485, MAX1487Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pF MAX481 (Note 5)Figures 5 and 11, C RL = 15pF, S2 closedFigures 5 and 11, C RL = 15pF, S1 closed Figures 5 and 11, C RL = 15pF, S2 closed Figures 5 and 11, C RL = 15pF, S1 closed Figures 6 and 10, R DIFF = 54Ω,C L1= C L2= 100pFFigures 6 and 8,R DIFF = 54Ω,C L1= C L2= 100pF Figures 6 and 10,R DIFF = 54Ω,C L1= C L2= 100pF CONDITIONS ns 510t SKEW ns50200600t SHDNTime to ShutdownMbps 2.5f MAX Maximum Data Rate ns 2050t HZ Receiver Disable Time from High ns 103060t PLH 2050t LZ Receiver Disable Time from Low ns 2050t ZH Driver Input to Output Receiver Enable to Output High ns 2050t ZL Receiver Enable to Output Low 2090200ns ns 134070t HZ t SKD Driver Disable Time from High |t PLH - t PHL |DifferentialReceiver Skewns 4070t LZ Driver Disable Time from Low ns 4070t ZL Driver Enable to Output Low 31540ns51525ns 31540t R , t F 2090200Driver Output Skew to Output t PLH , t PHL Receiver Input to Output4070t ZH Driver Enable to Output High UNITS MIN TYP MAX SYMBOL PARAMETERFigures 7 and 9, C L = 100pF, S2 closed Figures 7 and 9, C L = 100pF, S1 closed Figures 7 and 9, C L = 15pF, S1 closed Figures 7 and 9, C L = 15pF, S2 closedM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 4_______________________________________________________________________________________SWITCHING CHARACTERISTICS—MAX483, MAX487/MAX488/MAX489(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)SWITCHING CHARACTERISTICS—MAX481/MAX485, MAX490/MAX491, MAX1487 (continued)(V CC = 5V ±5%, T A = T MIN to T MAX , unless otherwise noted.) (Notes 1, 2)3001000Figures 7 and 9, C L = 100pF, S2 closed Figures 7 and 9, C L = 100pF, S1 closed Figures 5 and 11, C L = 15pF, S2 closed,A - B = 2VCONDITIONSns 40100t ZH(SHDN)Driver Enable from Shutdown toOutput High (MAX481)nsFigures 5 and 11, C L = 15pF, S1 closed,B - A = 2Vt ZL(SHDN)Receiver Enable from Shutdownto Output Low (MAX481)ns 40100t ZL(SHDN)Driver Enable from Shutdown toOutput Low (MAX481)ns 3001000t ZH(SHDN)Receiver Enable from Shutdownto Output High (MAX481)UNITS MINTYP MAX SYMBOLPARAMETERt PLH t SKEW Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pFt PHL Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pFDriver Input to Output Driver Output Skew to Output ns 100800ns ns 2000MAX483/MAX487, Figures 7 and 9,C L = 100pF, S2 closedt ZH(SHDN)Driver Enable from Shutdown to Output High2502000ns2500MAX483/MAX487, Figures 5 and 11,C L = 15pF, S1 closedt ZL(SHDN)Receiver Enable from Shutdown to Output Lowns 2500MAX483/MAX487, Figures 5 and 11,C L = 15pF, S2 closedt ZH(SHDN)Receiver Enable from Shutdown to Output Highns 2000MAX483/MAX487, Figures 7 and 9,C L = 100pF, S1 closedt ZL(SHDN)Driver Enable from Shutdown to Output Lowns 50200600MAX483/MAX487 (Note 5) t SHDN Time to Shutdownt PHL t PLH , t PHL < 50% of data period Figures 5 and 11, C RL = 15pF, S2 closed Figures 5 and 11, C RL = 15pF, S1 closed Figures 5 and 11, C RL = 15pF, S2 closed Figures 5 and 11, C RL = 15pF, S1 closed Figures 7 and 9, C L = 15pF, S2 closed Figures 6 and 10, R DIFF = 54Ω,C L1= C L2= 100pFFigures 7 and 9, C L = 15pF, S1 closed Figures 7 and 9, C L = 100pF, S1 closed Figures 7 and 9, C L = 100pF, S2 closed CONDITIONSkbps 250f MAX 2508002000Maximum Data Rate ns 2050t HZ Receiver Disable Time from High ns 25080020002050t LZ Receiver Disable Time from Low ns 2050t ZH Receiver Enable to Output High ns 2050t ZL Receiver Enable to Output Low ns ns 1003003000t HZ t SKD Driver Disable Time from High I t PLH - t PHL I DifferentialReceiver SkewFigures 6 and 10, R DIFF = 54Ω,C L1= C L2= 100pFns 3003000t LZ Driver Disable Time from Low ns 2502000t ZL Driver Enable to Output Low ns Figures 6 and 8, R DIFF = 54Ω,C L1= C L2= 100pFns 2502000t R , t F 2502000Driver Rise or Fall Time ns t PLH Receiver Input to Output2502000t ZH Driver Enable to Output High UNITS MIN TYP MAX SYMBOL PARAMETERMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________530002.5OUTPUT CURRENT vs.RECEIVER OUTPUT LOW VOLTAGE525M A X 481-01OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )1.515100.51.02.0203540450.90.1-50-252575RECEIVER OUTPUT LOW VOLTAGE vs.TEMPERATURE0.30.7TEMPERATURE (°C)O U T P U TL O W V O L T A G E (V )500.50.80.20.60.40100125-20-41.5 2.0 3.0 5.0OUTPUT CURRENT vs.RECEIVER OUTPUT HIGH VOLTAGE-8-16M A X 481-02OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )2.5 4.0-12-18-6-14-10-203.54.5 4.83.2-50-252575RECEIVER OUTPUT HIGH VOLTAGE vs.TEMPERATURE3.64.4TEMPERATURE (°C)O U T P UT H I G H V O L T A G E (V )0504.04.63.44.23.83.01001259000 1.0 3.0 4.5DRIVER OUTPUT CURRENT vs.DIFFERENTIAL OUTPUT VOLTAGE1070M A X 481-05DIFFERENTIAL OUTPUT VOLTAGE (V)O U T P U T C U R R E N T (m A )2.0 4.05030806040200.5 1.5 2.53.5 2.31.5-50-2525125DRIVER DIFFERENTIAL OUTPUT VOLTAGEvs. TEMPERATURE1.72.1TEMPERATURE (°C)D I F FE R E N T I A L O U T P U T V O L T A G E (V )751.92.21.62.01.8100502.4__________________________________________Typical Operating Characteristics(V CC = 5V, T A = +25°C, unless otherwise noted.)NOTES FOR ELECTRICAL/SWITCHING CHARACTERISTICSNote 1:All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to deviceground unless otherwise specified.Note 2:All typical specifications are given for V CC = 5V and T A = +25°C.Note 3:Supply current specification is valid for loaded transmitters when DE = 0V.Note 4:Applies to peak current. See Typical Operating Characteristics.Note 5:The MAX481/MAX483/MAX487 are put into shutdown by bringing RE high and DE low. If the inputs are in this state for lessthan 50ns, the parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See Low-Power Shutdown Mode section.M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 6___________________________________________________________________________________________________________________Typical Operating Characteristics (continued)(V CC = 5V, T A = +25°C, unless otherwise noted.)120008OUTPUT CURRENT vs.DRIVER OUTPUT LOW VOLTAGE20100M A X 481-07OUTPUT LOW VOLTAGE (V)O U T P U T C U R R E N T (m A )6604024801012140-1200-7-5-15OUTPUT CURRENT vs.DRIVER OUTPUT HIGH VOLTAGE-20-80M A X 481-08OUTPUT HIGH VOLTAGE (V)O U T P U T C U R R E N T (m A )-31-603-6-4-2024-100-40100-40-60-2040100120MAX1487SUPPLY CURRENT vs. TEMPERATURE300TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )20608050020060040000140100-50-2550100MAX481/MAX485/MAX490/MAX491SUPPLY CURRENT vs. TEMPERATURE300TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )257550020060040000125100-50-2550100MAX483/MAX487–MAX489SUPPLY CURRENT vs. TEMPERATURE300TEMPERATURE (°C)S U P P L Y C U R R E N T (µA )257550020060040000125MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________7______________________________________________________________Pin DescriptionFigure 1. MAX481/MAX483/MAX485/MAX487/MAX1487 Pin Configuration and Typical Operating CircuitM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487__________Applications InformationThe MAX481/MAX483/MAX485/MAX487–MAX491 and MAX1487 are low-power transceivers for RS-485 and RS-422 communications. The MAX481, MAX485, MAX490,MAX491, and MAX1487 can transmit and receive at data rates up to 2.5Mbps, while the MAX483, MAX487,MAX488, and MAX489 are specified for data rates up to 250kbps. The MAX488–MAX491 are full-duplex trans-ceivers while the MAX481, MAX483, MAX485, MAX487,and MAX1487 are half-duplex. In addition, Driver Enable (DE) and Receiver Enable (RE) pins are included on the MAX481, MAX483, MAX485, MAX487, MAX489,MAX491, and MAX1487. When disabled, the driver and receiver outputs are high impedance.MAX487/MAX1487:128 Transceivers on the BusThe 48k Ω, 1/4-unit-load receiver input impedance of the MAX487 and MAX1487 allows up to 128 transceivers on a bus, compared to the 1-unit load (12k Ωinput impedance) of standard RS-485 drivers (32 trans-ceivers maximum). Any combination of MAX487/MAX1487 and other RS-485 transceivers with a total of 32 unit loads or less can be put on the bus. The MAX481/MAX483/MAX485 and MAX488–MAX491 have standard 12k ΩReceiver Input impedance.Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 8_______________________________________________________________________________________Figure 2. MAX488/MAX490 Pin Configuration and Typical Operating CircuitFigure 3. MAX489/MAX491 Pin Configuration and Typical Operating CircuitMAX483/MAX487/MAX488/MAX489:Reduced EMI and ReflectionsThe MAX483 and MAX487–MAX489 are slew-rate limit-ed, minimizing EMI and reducing reflections caused by improperly terminated cables. Figure 12 shows the dri-ver output waveform and its Fourier analysis of a 150kHz signal transmitted by a MAX481, MAX485,MAX490, MAX491, or MAX1487. High-frequency har-monics with large amplitudes are evident. Figure 13shows the same information displayed for a MAX483,MAX487, MAX488, or MAX489 transmitting under the same conditions. Figure 13’s high-frequency harmonics have much lower amplitudes, and the potential for EMI is significantly reduced.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers_______________________________________________________________________________________9_________________________________________________________________Test CircuitsFigure 4. Driver DC Test Load Figure 5. Receiver Timing Test LoadFigure 6. Driver/Receiver Timing Test Circuit Figure 7. Driver Timing Test LoadM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 10_______________________________________________________Switching Waveforms_________________Function Tables (MAX481/MAX483/MAX485/MAX487/MAX1487)Figure 8. Driver Propagation DelaysFigure 9. Driver Enable and Disable Times (except MAX488 and MAX490)Figure 10. Receiver Propagation DelaysFigure 11. Receiver Enable and Disable Times (except MAX488and MAX490)Table 1. TransmittingTable 2. ReceivingLow-Power Shutdown Mode (MAX481/MAX483/MAX487)A low-power shutdown mode is initiated by bringing both RE high and DE low. The devices will not shut down unless both the driver and receiver are disabled.In shutdown, the devices typically draw only 0.1µA of supply current.RE and DE may be driven simultaneously; the parts are guaranteed not to enter shutdown if RE is high and DE is low for less than 50ns. If the inputs are in this state for at least 600ns, the parts are guaranteed to enter shutdown.For the MAX481, MAX483, and MAX487, the t ZH and t ZL enable times assume the part was not in the low-power shutdown state (the MAX485/MAX488–MAX491and MAX1487 can not be shut down). The t ZH(SHDN)and t ZL(SHDN)enable times assume the parts were shut down (see Electrical Characteristics ).It takes the drivers and receivers longer to become enabled from the low-power shutdown state (t ZH(SHDN ), t ZL(SHDN)) than from the operating mode (t ZH , t ZL ). (The parts are in operating mode if the –R —E –,DE inputs equal a logical 0,1 or 1,1 or 0, 0.)Driver Output ProtectionExcessive output current and power dissipation caused by faults or by bus contention are prevented by two mechanisms. A foldback current limit on the output stage provides immediate protection against short cir-cuits over the whole common-mode voltage range (see Typical Operating Characteristics ). In addition, a ther-mal shutdown circuit forces the driver outputs into a high-impedance state if the die temperature rises excessively.Propagation DelayMany digital encoding schemes depend on the differ-ence between the driver and receiver propagation delay times. Typical propagation delays are shown in Figures 15–18 using Figure 14’s test circuit.The difference in receiver delay times, | t PLH - t PHL |, is typically under 13ns for the MAX481, MAX485,MAX490, MAX491, and MAX1487 and is typically less than 100ns for the MAX483 and MAX487–MAX489.The driver skew times are typically 5ns (10ns max) for the MAX481, MAX485, MAX490, MAX491, and MAX1487, and are typically 100ns (800ns max) for the MAX483 and MAX487–MAX489.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________1110dB/div0Hz5MHz500kHz/div10dB/div0Hz5MHz500kHz/divFigure 12. Driver Output Waveform and FFT Plot of MAX481/MAX485/MAX490/MAX491/MAX1487 Transmitting a 150kHz SignalFigure 13. Driver Output Waveform and FFT Plot of MAX483/MAX487–MAX489 Transmitting a 150kHz SignalM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 12______________________________________________________________________________________V CC = 5V T A = +25°CV CC = 5V T A = +25°CV CC = 5V T A = +25°CV CC = 5V T A = +25°CFigure 14. Receiver Propagation Delay Test CircuitFigure 15. MAX481/MAX485/MAX490/MAX491/MAX1487Receiver t PHLFigure 16. MAX481/MAX485/MAX490/MAX491/MAX1487Receiver t PLHPHL Figure 18. MAX483, MAX487–MAX489 Receiver t PLHLine Length vs. Data RateThe RS-485/RS-422 standard covers line lengths up to 4000 feet. For line lengths greater than 4000 feet, see Figure 23.Figures 19 and 20 show the system differential voltage for the parts driving 4000 feet of 26AWG twisted-pair wire at 110kHz into 120Ωloads.Typical ApplicationsThe MAX481, MAX483, MAX485, MAX487–MAX491, and MAX1487 transceivers are designed for bidirectional data communications on multipoint bus transmission lines.Figures 21 and 22 show typical network applications circuits. These parts can also be used as line repeaters, with cable lengths longer than 4000 feet, as shown in Figure 23.To minimize reflections, the line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possi-ble. The slew-rate-limited MAX483 and MAX487–MAX489are more tolerant of imperfect termination.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________13DIV Y -V ZRO5V 0V1V0V -1V5V 0V2µs/divFigure 19. MAX481/MAX485/MAX490/MAX491/MAX1487 System Differential Voltage at 110kHz Driving 4000ft of Cable Figure 20. MAX483, MAX487–MAX489 System Differential Voltage at 110kHz Driving 4000ft of CableFigure 21. MAX481/MAX483/MAX485/MAX487/MAX1487 Typical Half-Duplex RS-485 NetworkM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 14______________________________________________________________________________________Figure 22. MAX488–MAX491 Full-Duplex RS-485 NetworkFigure 23. Line Repeater for MAX488–MAX491Isolated RS-485For isolated RS-485 applications, see the MAX253 and MAX1480 data sheets.MAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________15_______________Ordering Information_________________Chip TopographiesMAX481/MAX483/MAX485/MAX487/MAX1487N.C. RO 0.054"(1.372mm)0.080"(2.032mm)DE DIGND B N.C.V CCARE * Contact factory for dice specifications.__Ordering Information (continued)M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 16______________________________________________________________________________________TRANSISTOR COUNT: 248SUBSTRATE CONNECTED TO GNDMAX488/MAX490B RO 0.054"(1.372mm)0.080"(2.032mm)N.C. DIGND Z A V CCYN.C._____________________________________________Chip Topographies (continued)MAX489/MAX491B RO 0.054"(1.372mm)0.080"(2.032mm)DE DIGND Z A V CCYREMAX481/MAX483/MAX485/MAX487–MAX491/MAX1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers______________________________________________________________________________________17Package 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 .)S O I C N .E P SM A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487Low-Power, Slew-Rate-Limited RS-485/RS-422 Transceivers 18______________________________________________________________________________________Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)MAX481/MAX483/MAX485/MAX487–MAX491Low-Power, Slew-Rate-Limited RS-485/RS-422 TransceiversMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________19©2003 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.M A X 481/M A X 483/M A X 485/M A X 487–M A X 491/M A X 1487P D I P N .E PSPackage Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to /packages .)。
4N25中文资料_数据手册_参数
SEMICONDUCTOR TECHNICAL DATA
GlobalOptoisolator™
6-Pin DIP Optoisolators Transistor Output
The 4N25/A, 4N26, 4N27 and 4N28 devices consist of a gallium arsenide infrared emitting diode optically coupled to a monolithic silicon phototransistor detector. • Most Economical Optoisolator Choice for Medium Speed, Switching Applications • Meets or Exceeds All JEDEC Registered Specifications • To order devices that are tested and marked per VDE 0884 requirements, the
1
1.4
TA = –55°C
1.2
25°C
1
100°C
1
10
100
1000
IF, LED FORWARD CURRENT (mA)
Figure 1. LED Forward Voltage versus Forward Current
0.1
0.01
0.5 1 2
5 10 20
50
IF, LED INPUT CURRENT (mA)
SCHEMATIC
1
6
2
5
3
4
PIN 1. LED ANODE 2. LED CATHODE 3. N.C. 4. EMITTER 5. COLLECTOR 6. BASE
22MT-145平均温度传感器说明书
22MT-145平均温度传感器有源温度传感器（4~20mA）可用于风管道内的平均温度的测量。
防护等级：NEMA 4 /IP65型号概览型号温度有源输出信号探针长度22MT-1454...20 mA6000 mm技术参数电气参数供电电源 DC 15...24 V, ±10%, 0.5 W电气接线可拆卸弹簧加载端子排,最大2.5 mm²线缆连接Ø6...10mmPG11电缆戈兰头, 带Ø6...8mm 防拉扣功能参数 多量程是输出有源信号最小负载 500 Ω介质空气测量数据测量值温度温度测量范围温度测量精度±3% 的测量范围材质线缆接头PA6, 黑色外壳调整跳线端子可改变测量范围，调整2秒钟后即可生效范围 [°C]范围 [°F]-30 (130)°F 设置工厂设置0...250°F S0 -50...50°C S 1 -10...120°CS 2 0...50°C 40...140°F 30...480°F 0...100°F 40...240°F 40...90°F S 3 0...250°C S 4 -15..35°C S 5 0...100°C S 6 -20...80°C S 7 0...160°C0...150°F顶盖: 聚碳酸酯,NCS S0580-Y6OR(搏力谋橙)底座: 聚碳酸酯,NCS S0580-Y6OR (搏力谋橙)密封: NBR70,黑色22MT-145安全提示环境湿度85%相对湿度，无结露环境温度-35...50 °C [-30...122 °F]外壳表面温度最高70 °C [160 °F]IEC/EN防护等级防触电保护等级：III (安全低压)NEMA/UL 防护等级UL Class 2EU联合CE标志IEC/EN认证IEC/EN 60730-1 和 IEC/EN 60730-2-9UL认证申请中IEC/EN防护等级IP65NEMA/UL 防护等级NEMA 4X 质量标准ISO 9001Safety notes只有经过专业培训的工作人员可以安装此产品及相应附件该产品只能用于规定的应用范围。
MAX4638EUE中文资料
General DescriptionThe MAX4638/MAX4639 are single 8:1 and dual 4:1CMOS analog multiplexers/demultiplexers (muxes/demuxes). Each mux operates from a single +1.8V to +5V supply or dual ±2.5V supplies. These devices fea-ture 3.5Ωon-resistance (R ON ) when powered with a single +5V supply and have -75dB of off-isolation and -85dB crosstalk from the output to each off channel.The switching times are 18ns t ON and 7ns t OFF . They feature a -3dB 85MHz bandwidth and a guaranteed 0.25nA leakage current at +25°C.A +1.8V to +5.5V operating range makes the MAX4638/MAX4639 ideal for battery-powered, portable instru-ments. All channels guarantee break-before-make switching. These parts feature bidirectional operation and can handle Rail-to-Rail ®analog signals. All control inputs are TTL/CMOS-logic compatible. Decoding is in standard BCD format, and an enable input is provided to simplify cascading of devices. These devices are avail-able in small 16-pin QFN, TSSOP and SOIC packages,as well as a 20-pin QFN package.ApplicationsAutomatic Test EquipmentLow-Voltage Data-Acquisition Systems Audio and Video Signal Routing Medical Equipment Battery-Powered Equipment Relay ReplacementFeatureso Guaranteed R ON3.5Ω(+5V or ±2.5V Supplies)6Ω(+3V Supply)o Guaranteed 0.4ΩR ON Match Between Channels o Guaranteed 1ΩR ON Flatness Over Signal Range o Guaranteed Low Leakage Currents0.25nA at +25°Co Switching Times: t ON =18ns, t OFF = 7ns o +1.8V to +5.5V Single-Supply Operation ±2.5V Dual-Supply Operation o Rail-to-Rail Signal Handling o TTL/CMOS-Logic Compatible o Crosstalk: -80dB (1MHz)o Off-Isolation: -60dB (10MHz)MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers________________________________________________________________Maxim Integrated Products 119-1782; Rev 1; 3/02Ordering InformationRail-to-Rail is a Registered Trademark of Nippon Motorola, Ltd.Pin Configurations/Functional DiagramsFor pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering Information continued at end of data sheet.M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog MultiplexersABSOLUTE MAXIMUM RATINGSELECTRICAL CHARACTERISTICS—+5V Single Supply(V+ = +5V ±10%, V- = 0, V IH = +2.4V, V IL = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at 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.(Voltages Referenced to GND)V+ to V- .................................................................................+6V V+, A_, EN ...............................................................-0.3V to +6V V- ............................................................................+0.3V to -6V NO_, COM_ (Note1)....................................-0.3V to (V+ + 0.3V)Continuous Current A_, EN .............................................±30mA Continuous Current NO_, COM_ ..................................±100mA Peak Current (NO_, COM_)(pulsed at 1ms, 10% duty cycle) ..............................±200mAContinuous Power Dissipation (T A = +70°C)16-Pin QFN (derate 18.5mW/°C above +70°C)........1481mW 16-Pin TSSOP (derate 5.7mW/°C above +70°C)........457mW 16-Pin SO (derate 8.70mW/°C above +70°C) ............696mW 20-Pin QFN (derate 20mW/°C above +70°C)..........1600mW Operating Temperature RangeMAX463_E_ E ...............................................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range ...........................-65°C to +150°C Lead Temperature (soldering, 10s) ...............................+300°CNote 1:Signals on COM_, NO_ exceeding V+ or V- are clamped by internal diodes. A_ and EN are clamped only to V- and canexceed V+ up to their maximum ratings. Limit forward-diode current to maximum current rating.MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS —+5V Single Supply (continued)(V+ = +5V ±10%, V- = 0, V IH = +2.4V, V IL = +0.8V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at T A = +25°C.)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS —+3.0V Single Supply(V+ = +2.7V to +3.3V, V- = 0, V IH = +2.0V, V IL = +0.4V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V+ = +3V and T A = +25°C.)MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog MultiplexersELECTRICAL CHARACTERISTICS —+3.0V Single Supply (continued)(V+ = +2.7V to +3.3V, V- = 0, V IH = +2.0V, V IL = +0.4V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V+ = +3V and T A = +25°C.)ELECTRICAL CHARACTERISTICS —±2.5V Dual Supplies(V+ = +2.5 ±10%, V- = -2.5V ±10%, V IH = +2.0V, V IL = +0.4V, T A =T MIN to T MAX , unless otherwise noted. Typical values are at V±= ±2.5V and T A = +25°C.)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog MultiplexersELECTRICAL CHARACTERISTICS —±2.5V Dual Supplies (continued)(V+ = +2.5 ±10%, V- = -2.5V ±10%, V IH = +2.0V, V IL = +0.4V, T A = T MIN to T MAX , unless otherwise noted. Typical values are at V±= ±2.5V and T A = +25°C.)Note 3:∆R ON = R ON(MAX)- R ON(MIN).Note 4:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over thespecified analog signal ranges.Note 5:Guaranteed by design.Note 6:Off-Isolation = 20log 10(V COM_/ V NO_), V COM_= output, V NO_= input to off switch.Note 7:Between any two switches.Note 8:∆R ON matching specifications for QFN packaged parts are guaranteed by design.6______________________________________________________________________________________MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers_______________________________________________________________________________________705101520252.0 2.51.0 1.50.53.0 3.54.0 4.55.0ON-RESISTANCE vs. V COMV COM (V)R O N (Ω)01.00.51.53.03.52.52.04.001.0 1.52.0 2.50.53.0 3.54.0 4.55.0ON-RESISTANCE vs. V COM ANDTEMPERATUREV COM (V)R 0N (Ω)2143560 1.0 1.50.5 2.0 2.5 3.0ON-RESISTANCE vs. V COM ANDTEMPERATUREV COM (V)R O N (Ω)60100801401201801602001.0 3.02.0 4.0 5.01.5 3.52.5 4.5 5.5 6.0SUPPLY CURRENT vs. SUPPLY VOLTAGEM A X 4638 t o c 04SUPPLY VOLTAGE (V)S U P P L Y C U R RE N T (p A )6428101214161820-2.5-0.51.5 3.5CHARGE INJECTION vs. V COMV COM (V)C H A R G E (p C )5.51010.10.010.001-4010-15356085SUPPLY CURRENT vs. TEMPERATUREM A X 463 t o c 06TEMPERATURE (°C)S U P P L Y C U R R E N T (n A )0.60.81.01.21.41.61.81.82.82.33.33.84.34.85.3LOGIC LEVEL THRESHOLD vs.SUPPLY VOLTAGE AND TEMPERATURESUPPLY VOLTAGE (V)L O G I C V O L T A G E (V )0105252015403530451.53.03.52.02.54.04.55.05.5ENABLE TURN-ON/TURN-OFF TIMEvs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)T I M E (n s)246810121416-40-1510356085ENABLE TURN-ON/TURN-OFF TIMEvs. TEMPERATURETEMPERATURE (°C)T I M E (n s )Typical Operating Characteristics(V+ = +5V, V- = 0, T A = +25°C, unless otherwise noted.)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers -120-80-100-40-600-200.0110.1101001000FREQUENCY RESPONSEFREQUENCY (MHz)R E S P O N S E (d B )0.010.00110.1100101000-40-2020408060ON/OFF-LEAKAGE CURRENTvs. TEMPERATURETEMPERATURE (°C)L E A K A G E C U R R E N T (p A)0.020.060.040.080.10TOTAL HARMONIC DISTORTIONvs. FREQUENCYFREQUENCY (kHz)T H D (%)0.0110.110100Pin DescriptionTypical Operating Characteristics (continued)(V+ = +5V, V- = 0, T A = +25°C, unless otherwise noted.)MAX4638/MAX46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers_______________________________________________________________________________________9Detailed DescriptionThe MAX4638/MAX4639 are low-voltage, CMOS analog muxes. The MAX4638 is an 8:1 mux that switches one of eight inputs (NO1–NO8) to a common output (COM)as determined by the 3-bit binary inputs A0, A1, and A2. The MAX4639 is a 4:1 dual mux that switches one of four differential inputs to a common differential out-put as determined by the 2-bit binary inputs A0 and A1.Both the MAX4638/MAX4639 have an EN input that can be used to enable or disable the device. When dis-abled, all channels are switched off. See Truth Tables.Applications InformationOvervoltage ProtectionProper power-supply sequencing is recommended for all CMOS devices. Do not exceed the absolute maxi-mum ratings because stresses beyond the listed rat-ings can cause permanent damage to the devices.Always sequence V+ on first, then V-, followed by the logic inputs. I f power-supply sequencing is not possi-ble, add two small-signal diodes (D1, D2) in series with the supply pins for overvoltage protection (Figure 1).Adding diodes reduces the analog signal range to one diode drop below V+ and one diode drop above V-, but does not affect the devices ’ low switch resistance.Device operation is unchanged, and the difference between V+ and V- should not exceed 6V. These pro-tection diodes are not recommended when using a sin-gle supply. For single-supply operation, V- should be connected to GND as close to the device as possible.MAX4638 (Single 8-to-1 Mux)MAX4639 (Dual 4-to-1 Mux)Truth TablesOrdering Information (continued)M A X 4638/M A X 46393.5Ω, Single 8:1 and Dual 4:1, Low-Voltage Analog Multiplexers 10______________________________________________________________________________________Test Circuits/Timing DiagramsMAX4638/MAX4639Low-Voltage Analog Multiplexers______________________________________________________________________________________11Figure 5. Charge InjectionTest Circuits/Timing Diagrams (continued)M A X 4638/M A X 4639Low-Voltage Analog Multiplexers 12______________________________________________________________________________________Figure 7. CrosstalkFigure 8. Channel OFF/ON CapacitanceTest Circuits/Timing Diagrams (continued)Chip InformationTRANSISTOR COUNT: 632Figure 6. Off-Isolation/On-Channel BandwidthMAX4638/MAX4639Low-Voltage Analog Multiplexers______________________________________________________________________________________13Pin Configurations (continued)M A X 4638/M A X 4639Low-Voltage Analog Multiplexers 14______________________________________________________________________________________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 .)MAX4638/MAX4639Low-Voltage Analog MultiplexersMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600_____________________15©2002 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.Package Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。
AO4459中文资料
AO4459中⽂资料SymbolTyp Max 33406275R θJL 1824Maximum Junction-to-Lead CSteady-State°C/WThermal Characteristics ParameterUnits Maximum Junction-to-AmbientAt ≤ 10s R θJA °C/W Maximum Junction-to-Ambient ASteady-State °C/W AO4459AO4459SymbolMin TypMaxUnits BV DSS -30V -1T J =55°C-5I GSS ±100nA V GS(th)-1.5-1.85-2.5V I D(ON)-30A 3846T J =125°C53685872m ?g FS 11S V SD -0.78-1V I S-3.5A C iss 668830pF C oss 126pF C rss 92pF R g69?Q g (10V)12.716nC Q g (4.5V) 6.4nC Q gs 2nC Q gd 4nC t D(on)7.7ns t r 6.8ns t D(off)20ns t f 10ns t rr 2230ns Q rr15nCTHIS PRODUCT HAS BEEN DESIGNED AND QUALIFIED FOR THE CONSUMER MARKET. APPLICATIONS OR USES AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS ARE NOT AUTHORIZED. AOS DOES NOT ASSUME ANY LIABILITY ARISING OUT OF SUCH APPLICATIONS OR USES OF ITS PRODUCTS. AOS RESERVES THE RIGHT TO IMPROVE PRODUCT DESIGN,FUNCTIONS AND RELIABILITY WITHOUT NOTICE.DYNAMIC PARAMETERS Maximum Body-Diode Continuous CurrentGate resistanceV GS =0V, V DS =0V, f=1MHzV GS =0V, V DS =-15V, f=1MHz Input Capacitance Output Capacitance Turn-On Rise Time Turn-Off DelayTime V GS =-10V, V DS =-15V, R L =2.5?, R GEN =3?Turn-Off Fall TimeTurn-On DelayTime SWITCHING PARAMETERSTotal Gate Charge (4.5V)Gate Source Charge Gate Drain Charge Total Gate Charge (10V)V GS =-10V, V DS =-15V, I D =-6.5Am ?V GS =-4.5V, I D =-5AI S =-1A,V GS =0V V DS =-5V, I D =-6.5AR DS(ON)Static Drain-Source On-ResistanceForward TransconductanceDiode Forward VoltageI DSS µA Gate Threshold Voltage V DS =V GS I D =-250µA V DS =-24V, V GS =0VV DS =0V, V GS =±20V Zero Gate Voltage Drain Current Gate-Body leakage current Electrical Characteristics (T J =25°C unless otherwise noted)STATIC PARAMETERS ParameterConditions Body Diode Reverse Recovery Time Body Diode Reverse Recovery ChargeI F =-6.5A, dI/dt=100A/µsDrain-Source Breakdown Voltage On state drain currentI D =-250µA, V GS =0V V GS =-10V, V DS =-5V V GS =-10V, I D =-6.5AReverse Transfer Capacitance I F =-6.5A, dI/dt=100A/µs A: The value of R θJA is measured with the device mounted on 1in 2FR-4 board with 2oz. Copper, in a still air environment with T A =25°C. The value in any a given application depends on the user's specific board design. The current rating is based on the t ≤ 10s thermal resistance rating.B: Repetitive rating, pulse width limited by junction temperature.C. The R θJA is the sum of the thermal impedence from junction to lead R θJL and lead to ambient.D. The static characteristics in Figures 1 to 6 are obtained using < 300µs pulses, duty cycle 0.5% max.E. These tests are performed with the device mounted on 1 in 2FR-4 board with 2oz. Copper, in a still air environment with T A =25°C. The SOA curve provides a single pulse rating. Rev0 Sept 2006AO4459AO4459。
max3485中文资料
MAX3483，MAX3485，MAX3486，MAX3488，MAX3490以及MAX3491是用于RS-485与RS-422通信的3.3V，低功耗收发器，每个器件中都具有一个驱动器和一个接收器。
MAX3483和MAX3488具有限摆率驱动器，可以减小EMI，并降低由不恰当的终端匹配电缆引起的反射，实现最高250kbps的无差错数据传输。
MAX3486的驱动器摆率部分受限，可以实现最高2.5Mbps的传输速率。
MAX3485，MAX3490和MAX3491则可以实现最高10Mbps 的传输速率。
驱动器具有短路电流限制，并可以通过热关断电路将驱动器输出置为高阻状态，防止过度的功率损耗。
接收器输入具有失效保护特性，当输入开路时，可以确保逻辑高电平输出。
特性●半双工●速率：10Mbps●限摆率：NO●接收允许控制：YES●关断电流：2nA●引脚数：8参数暂无MAX3485的参数信息引脚图与功能MAX3485ESA品牌厂家：Maxim Integrated（美信），MAX3485ESA 渠道分销商：2家，现货库存数量：1542 PCS，MAX3485ESA价格参考：¥8.121元。
Maxim Integrated（美信）MAX3485ESA参数（SOIC 8Pin 3V 10Mbps，封装：SOIC），MAX3485ESA中文资料和引脚图及功能表说明书PDF下载（17页，409KB），您可以在MAX3485ESA接口芯片规格书Datesheet数据手册中，查到MAX3485ESA引脚图及功能的应用电路图电压和使用方法，MAX3485ESA典型电路教程。
MAX3485ESA可以用什么代替？代换型号如：MAX3485CSA+T、MAX3485CSA替代换，MAX3485ESA芯片系列中文手册中包含MAX3485ESA各引脚定义说明介绍及MAX3485ESA引脚功能图解，用户中文手册MAX3485ESA芯片手册PDF下载（17页，409KB）。
MAX5842LEUB+中文资料
VDD OUTA OUTB OUTC OUTD
µMAX Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd. I2C is a trademark of Philips Corp.
REF
________________________________________________________________ Maxim Integrated Products
TOP VIEW
ADD 1 SCL VDD GND SDA 2 3 4 5 10 OUTD 9 OUTC OUTB OUTA REF
RS SCL RS SDA MAX5842 REF
VDD OUTA OUTB OUTC OUTD
MAX5842
8 7 6
RS SCL RS SDA REF
MAX5842
Features
MAX5842
Ordering Information
PART MAX5842LEUB TEMP RANGE
o o
Applications
Digital Gain and Offset Adjustments Programmable Voltage and Current Sources Programmable Attenuation VCO/Varactor Diode Control Low-Cost Instrumentation Battery-Powered Equipment ATE
ELECTRICAL CHARACTERISTICS
(VDD = +2.7V to +5.5V, GND = 0, VREF = VDD, RL = 5kΩ, CL = 200pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VDD = +5V, TA = +25°C.) (Note 1)
MAX34561T+;中文规格书,Datasheet资料
_________________________________________________________________Maxim Integrated Products__1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, MAX3456112V/5V Hot-Plug Switch 19-5621; Rev 1; 1/12General Description The MAX34561 is a dual, self-contained, hot-plug switch intended to be used on +12V and +5V power rails to limit through current and to control the power-up output-volt-age ramp. The device contains two on-board n-channel power MOSFETs that are actively closed-loop controlled to ensure that an adjustable current limit is not exceed-ed. The maximum allowable current through the device is adjusted by external resistors connected between the LOAD and ILIM pins.The device can control the power-up output-voltage ramp. Capacitors connected to the VRAMP pins set the desired voltage-ramp rate. The output voltages are unconditionally clamped to keep input overvoltage stresses from harming the load. The device also contains adjustable power-up timers. Capacitors connected to the TIMER pins determine how long after power-on reset (POR) the device should wait before starting to apply power to the loads. The TIMER pins can be driven with a digital logic output to create a device-enable function. The device contains an on-board temperature sensor with hysteresis. If operating conditions cause the device to exceed an internal thermal limit, the device either unconditionally shuts down and latches off awaiting a POR, or waits until the device has cooled by the hyster-esis amount and then restarts.Applications RAID/Hard DrivesServers/RoutersPCI/PCI Express MInfiniBand TM/SMBase StationsFeatures S Completely_Integrated_Hot-Plug_Functionality_for_ +12V_and_+5V_Power_RailsS Dual_Version_of_the_DS4560S On-Board_Power_MOSFETs_(68m I_and_43m I)S No_High-Power_R SENSE_Resistors_NeededS Adjustable_Current_LimitsS Adjustable_Output-Voltage_Slew_RatesS Adjustable_Power-Up_Enable_TimingS Output_Overvoltage_LimitingS On-Board_Thermal_ProtectionS On-Board_Charge_PumpS User-Selectable_Latchoff_or_Automatic_Retry_ OperationOrdering Information+Denotes a lead(Pb)-free/RoHS compliant package.T = Tape and reel.*EP = Exposed pad.PCI Express is a registered trademark of PCI-SIG Corp. InfiniBand is a trademark and service mark of InfiniBand TradeAssociation.PART TEMP_RANGE PIN-PACKAGE MAX34561T+-40N C to +85N C24 TQFN-EP* MAX34561T+T-40N C to +85N C24 TQFN-EP*M A X 3456112V/5V Hot-Plug Switch 2Stresses 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.Voltage Range on V CC5 Relative to GND ............-0.3V to +6.5V Voltage Range on V CC12 Relative to GND ...........-0.3V to +18V Voltage Range on ILIM5, VRAMP5,TIMER5, ARD5 Relative to GND .........-0.3V to (V CC5 + 0.3V),not to exceed +6.5VVoltage Range on ILIM12, VRAMP12Relative to GND ................................-0.3V to (V CC12 + 0.3V),not to exceed +18VVoltage Range on TIMER12, ARD12Relative to GND .......................................-0.3V to +5V (V REG )5V Drain CurrentContinuous ............................................................................2A Peak ......................................................................................4A12V Drain CurrentContinuous ............................................................................3A Peak ......................................................................................4A Continuous Power Dissipation (T A = +70N C)TQFN (derate 20.8mW/N C above +70N C) ...............1666.7mW Operating Junction Temperature Range .........-40N C to +135N C Operating Temperature Range ..........................-40N C to +85N C Storage Temperature Range ..........................-55N C to +135N C Lead Temperature (soldering, 10s) ................................+300N C Soldering Temperature (reflow) ......................................+260N CRECOMMENDED_OPERATING_CONDITIONS(T J = -40N C to +135N C)ELECTRICAL_CHARACTERISTICS(V CC5 = +5V, V CC12 = +12V, T J = +25N C, unless otherwise noted.)ABSOLUTE_MAXIMUM_RATINGSPARAMETERSYMBOL CONDITIONSMIN TYP MAX UNITS V CC5 Voltage V CC5(Notes 1, 2) 4.0 5.0 5.5V V CC12 Voltage V CC12(Notes 1, 2)91213.2V R ILIM_ Value R ILIM_20400I C VRAMP_ Value C VRAMP_0.045F F C TIMER_ ValueC TIMER_0.045F F TIMER_ Turn-On Voltage V ON TIMER5 2.1V CC5 + 0.3V TIMER12 2.6 5.0TIMER_ Turn-Off VoltageV OFF-0.3+1.5VPARAMETERSYMBOL CONDITIONSMINTYP MAX UNITS V CC5 Supply Current I CC5(Note 3) 1.52mA V CC12 Supply Current I CC12(Note 3)1.52.25mA 5V UVLO: Rising V UR53.7 3.95V 5V UVLO: Falling V UF5 2.73.2V 5V UVLO: Hysteresis V UH50.5V 12V UVLO: Rising V UR1288.5V 12V UVLO: Falling V UF12 6.57V 12V UVLO: Hysteresis V UH121V 5V On-Resistance R ON54356m I 12V On-ResistanceR ON126888m I 5V Internal Voltage Reference V REF5 1.80V 12V Internal Voltage ReferenceV REF122.35VMAX3456112V/5V Hot-Plug Switch3ELECTRICAL_CHARACTERISTICS_(continued)(V CC5 = +5V, V CC12 = +12V, T J = +25N C, unless otherwise noted.)Note_1: All voltages are referenced to ground. Currents entering the device are specified positive, and currents exiting the deviceare negative.Note_2: This supply range guarantees that the LOAD voltage is not clamped by the overvoltage limit.Note_3: Supply current specified with no load on the LOAD pin.Note_4: Guaranteed by design; not production tested.PARAMETERSYMBOL CONDITIONSMINTYP MAXUNITS 5V MOSFET Output Capacitance C OUT (Note 4)400pF 12V MOSFET Output CapacitanceC OUT(Note 4)400pF5V and 12V Delay Time from Enable to Beginning of Conductiont POND C VRAMP_ = 1F F 8ms5V and 12V Gate-Charging Time from Conduction to 90% of V OUT t GCT C VRAMP_ = 1F F, C LOAD_ = 1000F F 486480ms Shutdown Junction Temperature T SHDN (Note 4)120135150N C Thermal Hysteresis T HYS (Note 4)40N C TIMER_ Charging Current I TIMER 648096F A VRAMP_ Charging Current I VRAMP 648096F A 5V Overvoltage Clamp V OVC5 5.5 6.0 6.5V 12V Overvoltage Clamp V OVC1213.21516.5V 5V Power-On Short-Circuit Current LimitI SCL5R ILIM5 = 47I (Note 5)0.6 1.0 1.5A 12V Power-On Short-Circuit Current LimitI SCL12R ILIM12 = 47I (Note 5)0.6 1.0 1.5A 5V Operating Overload Current LimitI OVL5R ILIM5 = 47I (Notes 4, 6) 1.5 2.5 3.7A 12V Operating Overload Current LimitI OVL12R ILIM12 = 47I (Notes 4, 6) 1.00 1.8 2.6A 5V VRAMP5 Slew Rate SR VRAMP C VRAMP5 = 1F F 0.160.190.23V/ms 12V VRAMP12 Slew Rate SR VRAMP C VRAMP12 = 1F F0.130.150.18V/ms ARD5 Pullup Resistor R PU5100k I ARD12 Pullup ResistorR PU12k IM A X 3456112V/5V Hot-Plug Switch 4Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)ON-RESISTANCE vs. TEMPERATURETEMPERATURE (°C)R O N (m Ω)10012080604020-20102030405060700-40OVERVOLTAGE CLAMP vs. TEMPERATURETEMPERATURE (°C)O V E R V O L T A G E C L A M P (V )10012080604020-2015.015.215.415.615.816.016.214.8-40OVERVOLTAGE CLAMP vs. TEMPERATURETEMPERATURE (°C)O V E R V O L T A G E C L A M P (V )120100608002040-206.106.156.206.256.306.356.406.456.506.556.05-40CURRENT LIMIT vs. TEMPERATURETEMPERATURE (°C)C U R R E N T L I M I T (A )10012080604020-200.51.01.52.02.50-40CURRENT LIMIT vs. TEMPERATURETEMPERATURE (°C)C U R R E N T L I M I T (A )10012080604020-200.51.01.52.02.53.03.50-4012V CURRENT LIMIT vs. ILIM RESISTANCER ILIM (Ω)12V C U R R E N T L I M I T (A )100500.51.01.52.02.501505V CURRENT LIMIT vs. ILIM RESISTANCER ILIM (Ω)5V C U R R E N T L I M I T (A )501000.20.40.60.81.01.21.41.61.82.02.22.42.60150SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)I C C (m A )120100608002040-200.20.40.60.81.01.21.41.61.80-40MAX3456112V/5V Hot-Plug Switch5Typical Operating Characteristics (continued)(T A = +25°C, unless otherwise noted.)THERMAL SHUTDOWN WITH AUTORETRY ENABLEDV CC = 12V, 2Ω RESISTIVE LOADMAX34561 toc16500ms/divV CC12LOAD125V/divLOAD CURRENT500mA/divTHERMAL SHUTDOWN WITH AUTORETRY ENABLEDV CC = 5V, 2Ω RESISTIVE LOADMAX34561 toc151s/div V CC5LOAD52V/divLOAD CURRENT500mA/divTURN-ON WAVEFORMSV CC = 12V, 3300µF CAPACITIVE LOAD10ms/divV CC12LOAD12LOAD CURRENT500mA/div5V/divTURN-ON WAVEFORMSV CC = 5V, 3300µF CAPACITIVE LOAD5ms/div V CC5LOAD5LOAD CURRENT500mA/div2V/divTURN-ON WAVEFORMSV CC = 12V, 20Ω RESISTIVE LOAD5ms/div V CC12LOAD12LOAD CURRENT500mA/div5V/divTURN-ON WAVEFORMS V CC = 5V, 20Ω RESISTIVE LOAD5ms/divTYPICAL MAX34561 TURN-ON WAVEFORMSV CC = 12V, 20Ω RESISTIVE LOAD5ms/div 2V /d i vTYPICAL MAX34561 TURN-ON WAVEFORMSV CC = 5V, 20Ω RESISTIVE LOAD2ms/div 1V /d i vM A X 3456112V/5V Hot-Plug SwitchPin ConfigurationPin DescriptionMAX3456112V/5V Hot-Plug Switch7Detailed DescriptionThe MAX34561 has hot-plug controls for both +12V and +5V power rails. The circuitry for the +12V and +5V con-trols are independent of each other and can be treated as two separate hot-plug switches, even though the GND pin is common between the two switches. The sections that follow are written from the +12V circuit perspective, but also apply for the +5V switch control.The device begins to operate when the supply voltage V CC12 (or V CC5) exceeds its undervoltage lockout level, V UR12 (or V UR5). At this level, the corresponding enable circuit and TIMER12 (TIMER5) become active. Once the device has been enabled, a gate voltage is applied to the corresponding power MOSFET, allowing current to begin flowing from V CC12 (V CC5) to LOAD12 (LOAD5). The speed of the output-voltage ramp is controlled by the capacitance placed at the VRAMP12 (VRAMP5) pin. The load current is continuously monitored during the initial conduction (I SCL12 or I SCL5) and after the cor-responding MOSFET is fully on (I OVL12 or I OVL5). If the current exceeds the current limit that is set by the exter-nal resistance at ILIM12 (ILIM5), the gate voltage of the corresponding power MOSFET is decreased, reducing the output current to the set current limit.Current is limited by the device comparing the volt-age difference between LOAD12 (LOAD5) and ILIM12 (ILIM5) to an internal reference voltage. If the output cur-rent exceeds the limit that is set by the R ILIM12 (R ILIM5) resistor, the gate voltage of the corresponding power MOSFET is decreased, which reduces the output current to the load.When the output power is initially ramping up, the current limit is I SCL12 (I SCL5). Once the corresponding MOSFET is fully on, the current limit is I OVL12 (I OVL5). The I SCL12 (I SCL5) current limit protects the source if there is a dead short on initial power-up.The device acts as a fuse and automatically disables the current flowing to the load when the temperature of the power corresponding MOSFET has exceeded the shut-down junction temperature, T SHDN .Enable/TimerThe voltage level of TIMER12 (TIMER5) is compared to an internal source (see the Functional Diagram ). When the level on the pin exceeds V ON , the comparator out-puts a low level. This then turns on the voltage ramp circuit, enabling the device’s output. TIMER12 (TIMER5) can be configured into one of four different modes of operation as listed in Table 1. TIMER12 (TIMER5) pin was designed to work with most logic families. TIMER12 (TIMER5) has at least 250mV of hysteresis between V ON and V OFF . It is recommended that any logic gate used to drive TIMER12 (TIMER5) be tested to ensure proper operation.Pin Description (continued)Table_1._TIMER__Pin_ModesPINNAMEFUNCTION22ARD55V Autoretry Disable. Connect this pin to GND to disable automatic retry functionality; the device latches off during an overtemperature fault. Leave this pin open to enable automatic retry function. This pin contains a pullup (R PU5) to V CC5. This pin is only sampled on device power-on. If the 5V side is not used, connect this pin to GND.23VRAMP55V Voltage Ramp Control. A capacitor connected to this pin determines the voltage ramp of the LOAD5 output during turn-on according to the equation: dV LOAD5 = 2.3332 x (I VRAMP /C VRAMP5).24TIMER55V Enable Delay Control. A capacitor connected to this pin determines the enable delay according to the equation: Enable Delay = C TIMER5 x (V REF5/I TIMER ).—EPExposed Pad. Connect to ground. The EP must be soldered to ground for proper thermal and elec-trical operation.OPERATION_MODE TIMER_PIN_SETUP Automatic Enable No connection to TIMER12 (TIMER5)Delayed Automatic EnableCapacitor C TIMER_ connected to TIMER12 (TIMER5)Enable/Disable Open-collector device Enable with Delay/DisableOpen-collector device and C TIMER _M A X 3456112V/5V Hot-Plug SwitchFunctional DiagramMAX3456112V/5V Hot-Plug Switch9Once the device has been enabled, there is a delay (t POND ) until conduction begins from V CC12 (V CC5) to LOAD12 (LOAD5). This delay is the time required for the charge pump to bring the gate voltage of the cor-responding power MOSFET above its threshold level. Once the gate is above the threshold level, conduction begins and the output voltage begins ramping.Automatic-Enable ModeWhen V CC12 (V CC5) exceeds V UR12 (V UR5), the gate holding the TIMER12 (TIMER5) node low is released. The internal current source brings the node to a level greater than V ON , enabling the device.Delayed Automatic-Enable ModeWhen V CC12 (V CC5) exceeds V UR12 (V UR5), the gate holding the TIMER12 (TIMER5) node low is released. The internal current source (I TIMER ) then begins charging C TIMER_. When C TIMER_ is charged to a level greater than V REF12 (V REF5), the device turns on. The equation for the delay time is:t DELAY = (C TIMER12 x V REF12)/I TIMER t DELAY = (C TIMER5 x V REF5)/I TIMEREnable/Disable ModeA logic gate or open-collector device can be connected to TIMER12 (TIMER5) to enable or disable the device. When TIMER12 (TIMER5) is held low, the device is dis-abled. When an open-collector device is used to drive TIMER12 (TIMER5), the device is enabled when the open collector is in its high-impedance state by the internal current source bringing the TIMER12 (TIMER5) node high. TIMER12 (TIMER5) is also compatible with most logic families if the output high voltage level of the gate exceeds the V ON level, and the gate can sink the I TIMER current.Enable with Delay/Disable ModeAn open-collector device is connected in parallel with C TIMER_. When the pin is held low, the device is dis-abled. When the open-collector driver is high imped-ance, the internal current source begins to charge C TIMER_ as in the delayed mode.Output-Voltage RampThe voltage ramp circuit uses an operational ampli-fier to control the gate bias of the corresponding n-channel power MOSFET. When the timer/enable circuit is disabled, a FET is used to keep C VRAMP_ discharged, which forces the output voltage to GND. Once the enable/timer circuit has been enabled, aninternal current source, I VRAMP , begins to charge the external capacitor, C VRAMP_, connected to VRAMP12 (VRAMP5). The amplifier controls the gate of the corre-sponding power MOSFET so that the LOAD12 (LOAD5) output voltage divided by two tracks the rising voltage level of C VRAMP_. The output voltage continues to ramp until it reaches either the input V CC12 (V CC5) level or the overvoltage clamp limits. The equation for the output-voltage ramp function is:dV LOAD /dt = 2 x (I VRAMP /C VRAMP12) for +12V circuit dV LOAD /dt = 2.3332 x (I VRAMP /C VRAMP5) for +5V circuitThermal ShutdownThe device enters a thermal shutdown state when the temperature of the corresponding power MOSFET reaches or exceeds T SHDN , approximately +135N C. When T SHDN is exceeded, the thermal-limiting cir-cuitry disables the device using the enable circuitry. Depending on the state of ARD12 (ARD5), the device attempts to autoretry once the device has cooled, or it latches off.AutoretryIf ARD12 (ARD5) is unconnected or connected high, the device continually monitors the temperature once it has entered thermal shutdown. If the junction temperature falls below approximately +95N C (T SHDN - T HYS ), the corresponding power MOSFET is re-enabled. See the Thermal Shutdown with Autoretry Enabled typical operat-ing curves for details.LatchoffIf ARD12 (ARD5) is pulled low and the device has entered thermal shutdown, it does not attempt to turn back on. The only way to turn the device back on is to cycle the power to the device. When power is reapplied to V CC12 (V CC5), the junction temperature needs to be less than T SHDN for the device to be enabled.Overvoltage LimitThe overvoltage-limiting clamp monitors the VRAMP12 (VRAMP5) level compared to an internal voltage ref-erence. When the voltage on VRAMP12 (VRAMP5) exceeds V OVC12/2 (or V OVC5/2.3332), the gate volt-age of the corresponding n-channel power MOSFET is reduced, limiting the voltage on LOAD12 (LOAD5) to V OVC12 (V OVC5) even as V CC12 (V CC5) increases. If the device is in overvoltage for an extended period of time, the device could overheat and enter thermal shutdown. This is caused by the power created by the voltageM A X 3456112V/5V Hot-Plug Switch 10drop across the corresponding power MOSFET and the load current. See the Thermal Shutdown with Autoretry Enabled typical operating curves for details.Applications InformationExposed PadThe exposed pad is also a heatsink for the device. The exposed pad should be connected to a large trace or plane capable of dissipating heat from the device.Decoupling CapacitorsIt is of utmost importance to properly bypass the device's supply pins. A decoupling capacitor absorbs the energy stored in the supply and board parasitic inductance when the FET is turned off, thereby reducing the magni-tude of overshoot at V CC . This can be accomplished by using a high-quality (low ESR, low ESL) ceramic capaci-tor connected directly between the V CC and GND pins. Any series resistance with this bypass capacitor lowers its effectiveness and is not recommended. A minimum 0.5µF ceramic capacitor is required. However, depend-ing on the parasitic inductances present in the end appli-cation, a larger capacitor could be necessary.Unused PinsIf only one side (5V or 12V) of the device is being used, it is required that the unused V CC , AR, CTIMER, and VRAMP pins be connected to GND. Leaving these input pins unconnected can result in interference of the proper operation of the active portion of the device.LOAD and ILIM ConnectionsSmall parasitic resistances in the bond wires of the LOAD pins and in the traces connected to the LOAD pins can result in a voltage offset while current is flowing. Since the voltage drop across RILIM is used to set the I SCL and I OVL limits, this induced offset can increase the value of I SCL and I OVL from the specified values for any given R ILIM . To greatly reduce this offset, it is recommended that one of the LOAD pins have a dedicated connection to ILIM though R ILIM , and not be used to pass the LOAD current (Figure 1). This would leave three LOAD pins to pass I LOAD , which should be sufficient. Because there is only a small amount of current passed from this lone LOAD pin to ILIM, there is a negligible voltage offset applied to the internal comparator. This method is the best way to attain an accurate current limit for I LOAD .Package InformationFor the latest package outline information and land patterns, go to /packages . Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.Figure 1. LOAD and ILIM ConnectionsPACKAGE_TYPE PACKAGE_CODE OUTLINE_ND_PATTERN_NO.24 TQFN-EPT2444+421-013990-0022分销商库存信息: MAXIMMAX34561T+。
MAX6410BS44-T中文资料
General DescriptionThe MAX6406–MAX6411 is a family of ultra-low power circuits used for monitoring battery, power-supply, and regulated system voltages. Each detector contains a precision bandgap reference comparator and is trimmed to specified trip threshold voltages. These devices provide excellent circuit reliability and low cost by eliminating external components and adjustments when monitoring system voltages from 2.5V to 5.0V. A manual reset input is also included.The MAX6406–MAX6411 assert a signal whenever the V CC supply voltage falls below a preset threshold.These devices are differentiated by their output logic configurations and preset threshold voltages. The MAX6406/MAX6409 (push-pull) and the MAX6408/MAX6411 (open-drain) have an active-low output (OUT is logic low when V CC is below V TH ). The MAX6407/MAX6410 have an active-high push-pull output (OUT is logic high when V CC is below V TH ). All parts are guaranteed to be in the correct output logic state for V CC down to 1V. The detector is designed to ignore fast transients on V CC . The MAX6406/MAX6407/MAX6408 have voltage thresholds between 2.20V and 3.08V in approximately 100mV increments. The MAX6409/MAX6410/MAX6411 have voltage thresholds between 3.30V and 4.63V in approximately 100mV increments.Ultra-low supply current of 500nA (MAX6406/MAX6407/MAX6408) makes these parts ideal for use in portable equipment. These devices are available in 4-bump chip-scale packages (UCSP ).ApplicationsPortable/Battery-Powered Equipment Cell Phones PDAs MP3 Players PagersFeatureso Tiny 4-Bump (2 X 2) Chip-Scale Package, (Package Pending Full Qualification—Expected Completion Date 6/30/01. See UCSP Reliability Section for More Details.)o 70% Smaller Than SC70 Packages o Ultra-Low 500nA Supply Current (MAX6406/MAX6407/MAX6408)o Factory-Trimmed Reset Thresholds from 2.20V to 4.63V in Approximately 100mV Increments o ±2.5% Threshold Accuracy (-40°C to +85°C)o Manual Reset Inputo Guaranteed OUT Valid to V CC = 1.0Vo Three Reset Output Logic Options: Active-Low Push-Pull, Active-High Push-Pull, and Active-Low Open-Drain o Immune to Short V CC Transients o No External ComponentsMAX6406–MAX6411Voltage Detectors in 4-Bump (2 X 2)Chip-Scale PackageMaxim Integrated Products 119-2041; Rev 1; 8/01For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .The MAX6406–MAX6411 are available in factory-set V CCdetector thresholds from 2.20V to 4.63V, in approximately 0.1V increments. Choose the desired threshold suffix from Table 1and insert it in the blank space following “S”. There are 21standard versions with a required order increment of 2500pieces. Sample stock is generally held on the standard ver-sions only (Table1). Required order increment is 10,000 pieces for nonstandard versions (Table 2). Contact factory for avail-ability. All devices available in tape-and-reel only.UCSP reliability is integrally linked to the user’s assemblymethods, circuit board material, and environment. Refer to the UCSP Reliability Notice in the UCSP Reliability section of this data sheet for more information.Pin Configuration appears at end of data sheet.UCSP is a trademark of Maxim Integrated Products, Inc.Ordering InformationSelector GuideM A X 6406–M A X 6411Voltage Detectors in 4-Bump (2 X 2) Chip-Scale PackageABSOLUTE 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.All voltages measured to GND unless otherwise noted.VCC..........................................................................-0.3V to +6V OUT/OUT ...................................................-0.3V to (V CC + 0.3V)OUT (open-drain).....................................................-0.3V to +6V MR ..............................................................-0.3V to (V CC + 0.3V)Input/Output Current into Any Pin.......................................20mAContinuous Power Dissipation (T A = +70°C)4-Pin/Bump UCSP (derate 3.8mW/°C above +70°C)....303mW Operating Temperature Range ..........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range ............................-65°C to +160°C Bump Reflow Temperature .............................................+235°CELECTRICAL CHARACTERISTICS(V CC = 1.0V to 5.5V, T A = -40°C to +85°C, unless otherwise noted. Typical values are at V CC = 3V and T A = +25°C.) (Note1)MAX6406–MAX6411Voltage Detectors in 4-Bump (2 X 2)Chip-Scale Package_______________________________________________________________________________________3Note 2:Guaranteed by design.ELECTRICAL CHARACTERISTICS (continued)(V CC = 1.0V to 5.5V, T A = -40°C to +85°C, unless otherwise noted. Typical values are at V CC = 3V and T A = +25°C.) (Note1)Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)00.30.20.10.50.40.90.80.70.61.0-40-2020406080SUPPLY CURRENT vs. TEMPERATURETEMPERATURE (°C)S U P P L Y C U R R E N T (µA )050100200150250-40-2020406080PROPAGATION DELAY (V CC FALLING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )M A X 6406–M A X 6411Voltage Detectors in 4-Bump (2 X 2) Chip-Scale Package 4_______________________________________________________________________________________Typical Operating Characteristics (continued)(T A = +25°C, unless otherwise noted.)040206012010080140-40-2020406080PROPAGATION DELAY (V CC RISING)vs. TEMPERATURETEMPERATURE (°C)P R O P A G A T I O N D E L A Y (µs )01100010010MAXIMUM TRANSIENT DURATION vs. THRESHOLD OVERDRIVE500200100400300THRESHOLD OVERDRIVE V TH - V CC (mV)M A X I M U M T R A N S I E N T D U R A T I O N (µs )MAX6406–MAX6411Voltage Detectors in 4-Bump (2 X 2)Chip-Scale Package_______________________________________________________________________________________5M A X 6406–M A X 6411Detailed DescriptionManual Reset InputMany µP-based products require manual reset capabil-ity, allowing the operator, a test technician, or external logic circuit to initiate a reset. A logic low on MR asserts OUT/OUT . OUT/OUT remains asserted while MR is low.This input has an internal 50k Ωpullup resistor, so it can be left open if it is not used. MR can be driven with TTL or CMOS logic levels, or with open-drain/collector out-puts. Connect a normally open momentary switch from MR to GND to create a manual reset function. If MR is driven from long cables or if the device is used in a noisy environment, connect a 0.1µF capacitor from MR to ground to provide additional noise immunity.Applications InformationInterfacing to Different LogicVoltage ComponentsThe MAX6408/MAX6411 have an active-low, open-drain output. This output structure will sink current when OUT is asserted. Connect a pullup resistor from OUT to any supply voltage up to 5.5V (Figure 1). Select a resistor value large enough to allow a valid logic low (see Electrical Characteristics ), and small enough to register a logic high while supplying all input currents and leakage paths connected to the OUT line.Voltage Detectors in 4-Bump (2 X 2) Chip-Scale Package 6_______________________________________________________________________________________Negative-Going V CC TransientsThese devices are relatively immune to short-duration,negative-going V CC transients (glitches).The Typical Operating Characteristics show the Maximum Transient Duration vs. Threshold Overdrive graph, for which output pulses are not generated. The graph shows the maximum pulse width that a negative-going V CC transient may typically have before the devices issue output signals. As the amplitude of the transient increases, the maximum allowable pulse width decreases.UCSP ReliabilityThe chip-scale package (UCSP) represents a unique packaging form factor that may not perform equally to a packaged product through traditional mechanical reliabil-ity tests. CSP reliability is integrally linked to the user ’s assembly methods, circuit board material, and usage environment. The user should closely review these areas when considering use of a CSP package. Performance through Operating Life Test and Moisture Resistance remains uncompromised as it is primarily determined by the wafer-fabrication process.Mechanical stress performance is a greater considera-tion for a CSP package. CSPs are attached through direct solder contact to the user ’s PC board, foregoing the inherent stress relief of a packaged product lead frame. Solder joint contact integrity must be rmation on Maxim ’s qualification plan, test data, and usage recommendations are detailed in the UCSP appli-cation note, which can be found on Maxim ’s website at .Chip InformationTRANSISTOR COUNT: 512PROCESS: BiCMOSMAX6406–MAX6411Voltage Detectors in 4-Bump (2 X 2)Chip-Scale Package_______________________________________________________________________________________7Figure 1. Interfacing to Different Logic Voltage ComponentsPin ConfigurationM A X 6406–M A X 6411Voltage Detectors in 4-Bump (2 X 2) Chip-Scale Package Package InformationMaxim 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.8_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2001 Maxim Integrated ProductsPrinted USAis a registered trademark of Maxim Integrated Products.。
MAX865中文资料
Compact, Dual-Output Charge Pump MAX865
ABSOLUTE MAXIMUM RATINGS
V+ to GND .................................................................+12V, -0.3V IN to GND .................................................................+6.2V, -0.3V V- to GND ..................................................................-12V, +0.3V V- Output Current .............................................................100mA V- Short-Circuit to GND ................................................Indefinite Continuous Power Dissipation (TA = +70°C) µMAX (derate 4.1mW/°C above +70°C) .......................330mW Operating Temperature Range MAX865EUA .....................................................-40°C to +85°C Storage Temperature Range .............................-65°C to +160°C Lead Temperature (soldering, 10sec) .............................+300°C
MAX4866LEUT+T中文资料
Applications
Cell Phones
PDAs and Palmtop Devices
Digital Still Cameras MP3 Players
Features
♦ Overvoltage Protection Up to +28V ♦ Reverse Polarity Protection Down to -28V ♦ Preset Overvoltage (OV) Trip Level (7.4V, 6.35V,
Packages
Ordering Information
PART
PIN -
OV TRIP TOP PKG
PACKAGE LEVEL (V) MARK CODE
MAX4864LEUT-T 6 SOT23-6
MAX4864LELT 6 µDFN
MAX4865LEUT-T 6 SOT23-6
MAX4865LELT 6 µDFN
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Input Voltage Range
VIN
MAX4864L
1.2
28.0
V
7.0 7.4 7.8
Overvoltage Trip Level
OVLO VIN rising
MAX4865L MAX4866L
5.95 6.35 6.75 V
In addition, a ±15kV ESD protection is provided to the input when bypassed with a 1µF capacitor to ground. All devices are offered in a small 6-pin SOT23 and a 6-pin, 2mm x 2mm µDFN package, and are specified for operation over the -40°C to +85°C temperature range.
MAX1968EUI-T中文资料
ELECTRICAL CHARACTERISTICS
(VDD = PVDD1 = PVDD2 = SHDN = 5V, PGND1 = PGND2 = FREQ = GND, CTLI = MAXV = MAXIP = MAXIN = REF, CREF = 1µF, CCOMP = 0.1µF, LLX_ = 3.3µH, CCS = COS2 = 1µF, ITEC < 3ARMS (MAX1968), ITEC < 6ARMS (MAX1969), TA = 0°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.)
Peak LX Current (MAX1968) (Note 1).................................±4.5A Peak LX Current (MAX1969) (Note 1)....................................+9A Continuous Power Dissipation (TA = +70°C)
元器件交易网
19-2447; Rev 2; 2/07 EVAALVUAAILTAIOBNLEKIT
Power Drivers for Peltier TEC Modules
MAX1968/MAX1969
General Description
The MAX1968/MAX1969 are highly integrated and costeffective, high-efficiency, switch-mode drivers for Peltier thermoelectric cooler (TEC) modules. Both devices utilize direct current control to eliminate current surges in the TEC. On-chip FETs minimize external components while providing high efficiency. A 500kHz/1MHz switching frequency and a unique ripple cancellation scheme reduce component size and noise.
MAX4851ETE-T中文资料
General DescriptionThe MAX4851/MAX4851H /MAX4853/MAX4853H family of quad single-pole/single-throw (SPST) switches oper-ates from a single +2V to +5.5V supply and can handle signals greater than the supply rail. These switches fea-ture low 3.5Ωon-resistance with 40pF on-capacitance or 7Ωon-resistance with 30pF on-capacitance, making them ideal for switching audio and data signals.The MAX4851/MAX4851H are configured with four SPST switches and feature a comparator for head-phone detection or mute/send key functions. The MAX4853/MAX4853H have four SPST switches but do not include a comparator.For over-rail applications, these devices offer either the pass-through or high-impedance option. For the MAX4851/ MAX4853, signals greater than the positive supply (up to 5.5V) pass through the switch without dis-tortion. For the MAX4851H/MAX4853H, the switch input becomes high impedance when the input signal exceeds the supply rail.The MAX4851/MAX4851H /MAX4853/MAX4853H are available in the space-saving, 16-pin, 3mm x 3mm thin QFN package and operate over the -40°C to +85°C extended temperature range.ApplicationsUSB Switching Audio Signal Routing Cellular Phones Notebook ComputersPDAs and Other Handheld DevicesFeatures♦USB 2.0 Full Speed (12Mbps) and USB 1.1 Signal Switching ♦Switch Signals Greater than V CC ♦+2V to +5.5V Supply Range ♦3.5Ω/7ΩOn-Resistance♦30pF On-Capacitance (7ΩSwitch)♦150MHz -3dB Bandwidth ♦1.8V Logic Compatibility ♦Low Supply Current0.01µA (MAX4853)5µA (MAX4851)10µA (MAX4851H/MAX4853H)♦Low 0.01nA Leakage Current♦Available in a Space-Saving 3mm x 3mm, 16-Pin TQFN PackageMAX4851/MAX4851H/MAX4853/MAX4853H3.5Ω/7ΩQuad SPST Switches with Over-RailSignal Handling________________________________________________________________Maxim Integrated Products 1Ordering InformationBlock Diagram/Truth Table19-3471; Rev 0; 10/04For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .*EP = Exposed paddle.Pin Configurations and Typical Operating Circuit appear at end of data sheetM A X 4851/M A X 4851H /M A X 4853/M A X 4853H3.5Ω/7ΩQuad SPST Switches with Over-Rail Signal Handling 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.V CC , IN_, CIN, COM_, NO_ to GND (Note 1)........-0.3V to +6.0V COUT..........................................................-0.3V to (V CC + 0.3V)COUT Continuous Current................................................±20mA Closed-Switch Continuous Current COM_, NO_, NC_3.5ΩSwitch ................................................................±100mA 7ΩSwitch .....................................................................±50mA Peak Current COM_, NO_ (pulsed at 1ms, 50% duty cycle)3.5ΩSwitch ................................................................±200mA 7ΩSwitch ...................................................................±100mAPeak Current COM_, NO_ (pulsed at 1ms, 10% duty cycle)3.5ΩSwitch ................................................................±240mA 7ΩSwitch ...................................................................±120mA Continuous Power Dissipation (T A = +70°C)16-Pin Thin QFN (derate 20.8mW/°C above +70°C)...1667mW Operating Temperature Range ...........................-40°C to +85°C Junction Temperature......................................................+150°C Storage Temperature Range.............................-65°C to +150°C Lead Temperature (soldering, 10s).................................+300°CELECTRICAL CHARACTERISTICS(V= +2.7V to +5.5V, T = -40°C to +85°C, unless otherwise noted. Typical values are at V = +3.0V, T = +25°C, unless other-Note 1:Signals on IN_, NO_, or COM_ below GND are clamped by internal diodes. Limit forward-diode current to maximum currentrating.MAX4851/MAX4851H/MAX4853/MAX4853H3.5Ω/7Ω Quad SPST Switches with Over-RailSignal Handling_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)M A X 4851/M A X 4851H /M A X 4853/M A X 4853H3.5Ω/7ΩQuad SPST Switches with Over-Rail Signal Handling 4_______________________________________________________________________________________ELECTRICAL CHARACTERISTICS (continued)perature range.Note 3:Guaranteed by design and characterization; not production tested.Note 4:∆R ON = R ON(MAX)- R ON(MIN).Note 5:Flatness is defined as the difference between the maximum and minimum value of on-resistance as measured over thespecified analog signal ranges.Note 6:Off-isolation = 20log 10(V COM_/ V NO_), V COM_= output, V NO_= input to off switch.MAX4851/MAX4851H/MAX4853/MAX4853H3.5Ω/7Ω Quad SPST Switches with Over-RailSignal Handling_______________________________________________________________________________________5MAX4851/MAX4853ON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)4212345678910006MAX4851/MAX4853ON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)421.01.52.02.53.03.54.04.50.506MAX4851/MAX4853ON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)421.01.52.02.53.03.50.506MAX4851H/MAX4853HON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)4212345678910006MAX4851H/MAX4853HON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)2.52.00.51.01.51.52.02.53.03.54.04.55.01.03.0MAX4851H/MAX4853HON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)43211.01.52.02.53.03.50.505MAX4853ON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)4251015202530354045006MAX4853ON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)42345678206MAX4853ON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)541232.02.53.03.54.04.55.05.51.56Typical Operating Characteristics(V CC = 3.0V, T A = +25°C, unless otherwise noted.)M A X 4851/M A X 4851H /M A X 4853/M A X 4853H3.5Ω/7ΩQuad SPST Switches with Over-Rail Signal Handling 6_______________________________________________________________________________________MAX4853HON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)4251015202530354045006MAX4853HON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)2.52.01.51.00.5345678203.0MAX4853HON-RESISTANCE vs. COM VOLTAGECOM VOLTAGE (V)O N -R E S I S T A N C E (Ω)43122.02.53.03.54.04.55.05.51.55MAX4851SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )5.04.54.03.53.02.52.02.53.03.54.04.55.05.52.01.55.5MAX4851HSUPPLY CURRENT vs. SUPPLY VOLTAGE3456782SUPPLY VOLTAGE (V)S U P P L Y C U R R E N T(µA )5.04.54.03.53.02.52.01.55.50.20.40.60.81.0MAX4853SUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (n A)5.04.54.03.53.02.52.01.55.55.05.56.06.57.07.58.04.5MAX4853HSUPPLY CURRENT vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)S U P P L YC U R R E N T (µA )5.04.54.03.53.02.52.01.55.5TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)T U R N -O N /T U R N -O F F T I M E (n s)4.53.52.510203040506001.5 5.5TURN-ON/TURN-OFF TIME vs. TEMPERATURETEMPERATURE (°C)T U R N -O N /T U R N -O F F T I M E (n s )603510-152224262830323420-4085Typical Operating Characteristics (continued)(V CC = 3.0V, T A = +25°C, unless otherwise noted.)MAX4851/MAX4851H/MAX4853/MAX4853H3.5Ω/7Ω Quad SPST Switches with Over-RailSignal Handling_______________________________________________________________________________________7TURN-ON/TURN-OFF TIME vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)T U R N -O N /T U R N -O F F T I M E (n s )4.53.52.510203040506001.55.5TURN-ON/TURN-OFF TIME vs. TEMPERATURETEMPERATURE (°C)T U R N -O N /T U R N -O F F T I M E (n s )603510-152224262830323420-4085LOGIC THRESHOLD vs. SUPPLY VOLTAGESUPPLY VOLTAGE (V)L O G I C T H R E S H O L D (V )4.53.52.50.81.01.21.41.60.61.55.5CHARGE INJECTION vs. COM VOLTAGECOM VOLTAGE (V)C H A R G E I N J E C T I O N (p C )4321102030005CHARGE INJECTION vs. COM VOLTAGECOM VOLTAGE (V)C H A R G E I N J E C T I O N (p C )43211020305LEAKAGE CURRENT vs. TEMPERATURETEMPERATURE (°C)L E A K A G E C U R R E N T (n A )603510-150.20.40.60.81.01.21.40-4085LEAKAGE CURRENT vs. TEMPERATURETEMPERATURE (°C)L E A K A G E C U R R E N T (n A )6035-15100.20.40.60.81.01.21.41.60-4085FREQUENCY RESPONSEFREQUENCY (MHz)F R E Q U E N C Y R E S P O N S E (d B )100101-80-60-40-20020-1000.11000FREQUENCY RESPONSEFREQUENCY (MHz)F R E Q U E N C Y R E S P O N S E (d B )100101-80-60-40-20020-1000.11000Typical Operating Characteristics (continued)(V CC = 3.0V, T A = +25°C, unless otherwise noted.)M A X 4851/M A X 4851H /M A X 4853/M A X 4853H3.5Ω/7ΩQuad SPST Switches with Over-Rail Signal Handling 8_______________________________________________________________________________________TOTAL HARMONIC DISTORTIONvs. FREQUENCYFREQUENCY (Hz)T H D (%)10k1k 1000.110100k10.01TOTAL HARMONIC DISTORTIONvs. FREQUENCYFREQUENCY (Hz)T H D (%)10k1k 1000.110100k10.01(MAX4851/MAX4851H) COMPARATOR THRESHOLD vs. TEMPERATURETEMPERATURE (°C)C O M P A R A T O R T H R E S H O LD (V )603510-151.021.041.061.081.101.00-4085COMPARATOR THRESHOLDvs. TEMPERATURETEMPERATURE (°C)C O M P A R A T O R T H R E S H O L D (V )603510-151.6251.6501.6751.7001.7251.7501.600-4085MAX4851/MAX4853SWITCH PASSING SIGNALS ABOVE SUPPLY VOLTAGEV NC 2V/div 0VV COM 0V200µs/divV CC = 3.0VMAX4851H/MAX4853H SWITCH ENTERING HIGH-IMPEDANCE STATE200µs/divV NC 2V/div 0VV COM 0VV CC = 3.0VHI-Z STATE HI-Z STATETypical Operating Characteristics (continued)(V CC = 3.0V, T A = +25°C, unless otherwise noted.)Detailed Description The MAX4851/MAX4851H/MAX4853/MAX4853H are low on-resistance, low-voltage, analog switches that operate from a +2V to +5.5V single supply and are fully specified for nominal 3.0V applications. The MAX4851/MAX4853 devices feature over-rail signal capability that allows sig-nals up to 5.5V with supply voltages down to 2.0V to pass through without distortion. The MAX4851H/ MAX4853H enter high-impedance mode when the signal voltage exceeds V CC and return to normal operation when the signal voltage drops below V CC.tance, which allows switching of the data signals for USB 2.0/1.1 applications (12Mbps). They are designed to switch D+ and D- USB signals with a guaranteed skew of less than 1ns (see Figure 2), as measured from 50% of the input signal to 50% of the output signal.The MAX4851_ features a comparator that can be used for headphone or mute detection. The comparator threshold is internally generated to be approximately 1/3 of V CC.3.5Ω/7ΩQuad SPST Switches with Over-RailSignal Handling_______________________________________________________________________________________9MAX4851/MAX4851H/MAX4853/MAX4853H Pin DescriptionM A X 4851/M A X 4851H /M A X 4853/M A X 4853H3.5Ω/7ΩQuad SPST Switches with Over-Rail Signal Handling 10______________________________________________________________________________________Test Circuits/Timing DiagramsFigure 1. Switching TimeFigure 2. Input/Output Skew Timing DiagramMAX4851/MAX4851H/MAX4853/MAX4853H3.5Ω/7Ω Quad SPST Switches with Over-RailSignal Handling______________________________________________________________________________________11Figure 3. Charge InjectionTest Circuits/Timing Diagrams (continued)M A X 4851/M A X 4851H /M A X 4853/M A X 4853HApplications InformationDigital Control InputsThe logic inputs (IN_) accept up to +5.5V even if the supply voltages are below this level. For example, with a +3.3V V CC supply, IN_ can be driven low to GND and high to +5.5V, allowing for mixing of logic levels in a sys-tem. Driving IN_ rail-to-rail minimizes power consump-tion. For a +2V supply voltage, the logic thresholds are 0.5V (low) and 1.4V (high). For a +5V supply voltage, the logic thresholds are 0.8V (low) and 1.8V (high).Analog Signal LevelsThe on-resistance of these switches changes very little for analog input signals across the entire supply volt-age range (see Typical Operating Characteristics ). The switches are bidirectional; therefore, NO_ and COM_can be either inputs or outputs.ComparatorThe positive terminal of the comparator is internally set to V CC / 3. When the negative comparator terminal (CIN) is below the threshold (V CC / 3), the comparator output (COUT) goes high. When CIN rises above V CC / 3, COUT goes low.The comparator threshold allows for detection of head-phones since headphone audio signals are typically biased to V CC / 2.Power-Supply SequencingCaution: Do not exceed the absolute maximum rat-ings because stresses beyond the listed ratings may cause permanent damage to the device.Proper power-supply sequencing is recommended for all CMOS devices. Always apply V CC before applying analog signals, especially if the analog signal is not current limited.3.5Ω/7ΩQuad SPST Switches with Over-Rail Signal HandlingFigure 5. Channel Off-/On-CapacitanceFigure 6. Comparator Switching TimeSelector GuideMAX4851/MAX4851H/MAX4853/MAX4853H3.5Ω/7Ω Quad SPST Switches with Over-RailSignal Handling______________________________________________________________________________________13Pin ConfigurationsTypical Operating CircuitChip InformationTRANSISTOR COUNT: 735PROCESS: CMOSM A X 4851/M A X 4851H /M A X 4853/M A X 4853H3.5Ω/7ΩQuad SPST Switches with Over-Rail Signal Handling Maxim cannot assume responsib ility for use of any circuitry other than circuitry entirely emb odied 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.14____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2004 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 .)。
泰利特 xL865系列 4G LTE-A NB-IoT 蜂窝模块 数据手册说明书
Product DescriptionThe GL865-QUAD features the same characteristics as its companion module, the GL865-DUAL, but includes all 4 GSM bands for global applications. It is compliant to the eCall European directive recommended for application developers targeting the rich upcoming European market for eCall tracking/safety devices.Key Benefits• LCC form factor suitable for manual soldering and removal, so it can also serve low volume, nicheapplications• Ready to be integrated in an electronic safety system installed inside vehicles, automatically calling emergency services in case of accident• PYTHON Script Interpreter - customers can run their Python applications directly inside the module• Premium FOTA Management - Easy firmware update by transmitting only a small delta file Family ConceptThe Telit xL865 family was conceived to address system integrators and developers needing to start with low volumes (LCC mount) as well as those already running high volumes (VQFN mount). Its ultra-compact pack-age allows integration into very small devices. The family includes products that are pin-to-pin and API compatible in GSM | GPRS, CDMA | 1xRTT and UMTS | HSPA.Telit IoT LOCATEIoT LOCATE is a Telit portal-based service that providesa device’s position based on observed cellular Cell-IDs. Accessing a database of over 40 million cell-IDs globally, IoT LOCATE can provide a position for every use-case including indoors/underground, outdoors, and boundary situations.IoT Connectivity ReadyThis product is capable of supporting the extensive suite of IoT Connectivity value-added services and connectivity you can use to enhance your application and boost your competitive advantage.GL865-QUADEMEANorth AmericaLatin AmericaAPACKoreaAustralia GL865-QUADENABLING THE IoT IS WHAT WE Do.AvAILABLE ForCombine yourCellular module withComplete, Readyto Use Access to theInternet of ThingsShort RangemodulesGNSSmodules24.4 mm2.7 mm24.4 mmProduct Features• LCC Castellation form factor• Quad-band GSM | GPRS 850 / 900 / 1800 / 1900 MHz• GSM | GPRS protocol stack 3GPP Release 4 compliant• Control via AT commands according to 3GPP TS 27.005, 27.007 and Telit custom AT commands• Serial port multiplexer 3GPP TS 27.010 • SIM access profile• SIM application toolkit 3GPP TS 51.014 • DARP/SAIC support • SMS Support • SMS over GPRS• Telephony, emergency call• Half rate, full rate, enhanced full rate and adaptive multi rate voice codecs (HR, FR, EFR, AMR)• Superior echo cancellation & noise reduction • Multiple audio profiles pre-programmed and fully configurable by mean AT commands • DTMF• SIM phonebook• Fixed dialing number (FDN)• Real-time clock • Alarm management • Network LED support• IRA, GSM, 8859-1 and UCS2 character set • Jamming detection• Embedded TCP/IP stack, including TCP, IP, UDP, SMTP, ICMP and FTP protocols • PFM (Premium FOTA Management) Over-The-Air Update service • Remote AT commands • Event monitor• Telit’s EASY features EASY SCAN ® automatic scan over GSM frequencies (also without SIM card)DataGPrs• GPRS class 10 Mobile station class B • Coding scheme 1 to 4• PBCCH support• GERAN Feature Package 1 support (NACC, Extended TBF)CsdEnvironmental• Dimensions: 24.4 x 24.4 x 2.7 mm • Weight: 2.8 grams• Extended temperature range - 40°C to +85°C (operational)- 40°C to +85°C (storage temperature)Interfaces• 8 I/O ports maximum• Analog audio (balanced), digital audio • 2 A/D plus 1 D/A converter • Buzzer output• ITU-T V.24 serial link through CMOS UART: - Baud rate from 300 to 115,200 bps - Autobauding up to 115,200 bpsApprovals• Fully type approved conforming R&TTE directive • CE, GCF• FCC, IC, PTCRB (North America) • ANATEL (Brazil)Electrical & Sensitivity• Output power- Class 4 (2W) @ 850/900 MHz - Class 1 (1W) @ 1800/1900 MHz • Supply voltage range:3.22 -4.5 VDC (3.8 V DC recommended)• Power consumption (typical values) - Power off: ‹ 5 uA- Idle (registered, power saving): 1.5 mA @ DRX=9- Dedicated mode: 230 mA @ max power level - GPRS cl.10: 360 mA @ max power level • Sensitivity:- 108 dBm (typ.) @ 850/900 MHz - 107 dBm (typ.) @ 1800/1900 MHzGL865-QUADTelit Wireless Solutions Inc.3131 RDU Center Drive, Suite 135 Morrisville, NC 27560, USAPhone +1 888 846 9773 or +1 919 439 7977 Fax +1 888 846 9774 or +1 919 840 0337 E-Mail NORTHAMERICA @ Telit Wireless Solutions Inc. Rua Paes Leme, 524, Conj, 126 05424-101, Pinheiros São Paulo-SP-BrazilPhone +55 11 3031 5051 Fax +55 11 3031 5051E-Mail LATINAMERICA @ Telit Wireless Solutions Co., Ltd. 8th Fl., Shinyoung Securities Bld.6, Gukjegeumyung-ro8-gil, Yeongdeungpo-gu Seoul, 150-884, Korea Phone +82 2 368 4600 Fax +82 2 368 4606 E-Mail APAC @ [07.2015]Join the Telit Technical ForumFor a quicker and more rewarding integration experience join the Telit Technical Forum. There you can browse the first open forum covering all IoT topics, get direct support by region (EMEA, North America, Latin America, APAC), take part in this quickly growing IoT community and exchange experiences.Telit Communications S.p.A. Via Stazione di Prosecco, 5/B I-34010 Sgonico (Trieste), Italy Phone +39 040 4192 200 Fax +39 040 4192 383 E-Mail EMEA @ Telit reserves all rights to this document and the information contained herein. Products, names, logos and designs described herein may in whole or in part be subject to intellectual property rights.The information contained herein is provided “as is”. No warranty of any kind, either express or implied, is made in relation to the accuracy, reliability, fitness for a particular purpose or content of this document. This document may be revised by Telit at any time. For most recent documents, please visit Copyright © 2016, Telit* Copyright © 1990-2016, Python Software Foundation/techforum /facebook www.twitter.com/Telit_Corp。
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General DescriptionThe MAX4864L/MAX4865L/MAX4866L/MAX4867/MAX4865/MAX4866 overvoltage protection controllers protect low-voltage systems against high-voltage faults up to +28V, and negative voltages down to -28V. These devices drive a low-cost complementary MOSFET. If the input voltage exceeds the overvoltage threshold, these devices turn off the n-channel MOSFET to prevent dam-age to the protected components. If the input voltage drops below ground, the devices turn off the p-channel MOSFET to prevent damage to the protected compo-nents. An internal charge pump eliminates the need for external capacitors and drives the MOSFET GATEN for a simple, robust solution.The overvoltage thresholds are preset to +7.4V (MAX4864L), +6.35V (MAX4865L), +5.8V (MAX4866L),and +4.65V (MAX4867). When the input voltage drops below the undervoltage lockout (UVLO) threshold, the devices enter a low-current standby mode (8.5µA). Also in shutdown (EN set to logic-high), the current is reduced fur-ther (0.4µA). The MAX4864L/MAX4865L/MAX4866L have a +2.85V UVLO threshold, and the MAX4867 has a +2.5V UVLO threshold.The MAX4865/MAX4866 have a 4.15V UVLO threshold.In addition, a ±15kV ESD protection is provided to the input when bypassed with a 1µF capacitor to ground. All devices are offered in a small 6-pin SOT23 and a 6-pin,2mm x 2mm µDFN package, and are specified for operation over the -40°C to +85°C temperature range.ApplicationsFeatures♦Overvoltage Protection Up to +28V♦Reverse Polarity Protection Down to -28V♦Preset Overvoltage (OV) Trip Level (7.4V, 6.35V,5.8V, 4.65V)♦Drive Low-Cost Complementary MOSFET ♦Internal 50ms Startup Delay ♦Internal Charge Pump♦8.5µA Standby Current (In UVLO Mode)♦0.4µA Shutdown Current♦Overvoltage Fault FLAG Indicator♦6-Pin (2mm x 2mm) µDFN and 6-Pin SOT23PackagesMAX4864L/MAX4865L/MAX4866L/MAX4867/MAX4865/MAX4866Overvoltage Protection Controllers with Reverse Polarity Protection________________________________________________________________Maxim Integrated Products119-3582; Rev 1; 5/06For pricing, delivery, and ordering information,please contact Maxim/Dallas Direct!at 1-888-629-4642, or visit Maxim’s website at .Ordering InformationFunctional Diagram appears at end of data sheet.Note:All devices are specified over the -40°C to +85°C operating range.Typical Operating CircuitPin ConfigurationsCell PhonesDigital Still CamerasPDAs and Palmtop Devices MP3 PlayersM A X 4864L /M A X 4865L /M A X 4866L /M A X 4867Overvoltage Protection Controllers with Reverse Polarity Protection 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.IN to GND ..............................................................-0.3V to +30V GATEN, GATEP to GND ........................................-0.3V to +12V IN to GATEP ...........................................................-0.3V to +20V FLAG, EN to GND ....................................................-0.3V to +6V Continuous Power Dissipation (T A = +70°C)6-Pin µDFN (2mm x 2mm) (derate 2.1mW/°Cabove +70°C) ..............................................................168mW 6-Pin SOT23 (derate 8.7mW/°C above +70°C)............696mWOperating Temperature Range ..........................-40°C to +85°C Junction Temperature ....................................................+150°C Storage Temperature Range ............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................+300°CELECTRICAL CHARACTERISTICS(V IN = +5V (MAX4864L/MAX4865L/MAX4866L), V IN = +4V (MAX4867), T A = -40°C to +85°C, C GATEN = 500pF, unless otherwise noted. Typical values are at T A = +25°C.) (Note 1)MAX4864L/MAX4865L/MAX4866L/MAX4867Overvoltage Protection Controllers with Reverse Polarity Protection_______________________________________________________________________________________3ELECTRICAL CHARACTERISTICS (continued)(V IN = +5V (MAX4864L/MAX4865L/MAX4866L), V IN = +4V (MAX4867), T A = -40°C to +85°C, C GATEN = 500pF, unless otherwise noted. Typical values are at T = +25°C.) (Note 1)Figure 4. Disable Timing DiagramFigure 1. Startup Timing Diagram Figure 2. Shutdown Timing DiagramFigure 3. Power-Up Overvoltage Timing DiagramM A X 4864L /M A X 4865L /M A X 4866L /M A X 4867Overvoltage Protection Controllers with Reverse Polarity Protection 4_______________________________________________________________________________________Typical Operating Characteristics(T A = +25°C, unless otherwise noted.)SUPPLY CURRENT vs. SUPPLY VOLTAGE(MAX4864L)M A X 4864 t o c 01SUPPLY VOLTAGE (V)S U P P L Y C U R R E N T (µA )252015105501001502002503003500030REVERSE CURRENT vs. OUTPUT VOLTAGE(MAX4864L)OUTPUT VOLTAGE (V)R E V E R S E C U R R E N T (µA )43210.10.20.30.45REVERSE CURRENT vs. OUTPUT VOLTAGE(MAX4864L)OUTPUT VOLTAGE (V)R E V E R S E C U R R E N T (µA )432120406080005MAX4864L/MAX4865L/MAX4866L GATEN VOLTAGE vs. INPUT VOLTAGEINPUT VOLTAGE (V)G A T E N V O L T A G E (V )6423691215008MAX4867GATEN VOLTAGE vs. INPUT VOLTAGEINPUT VOLTAGE (V)G A T E N V O L T A G E (V )6423691215008POWER-UP RESPONSEMAX4864 toc0620ms/div10V0V 5V 0VINGATEN FLAG5V 0VADAPTER5V 0VPOWER-UP RESPONSEMAX4864 toc07IN 5V/div FLAG 5V/divOUT 5V/div ADAPTER 5V/div 20ms/divIIN 1A/div OVERVOLTAGE RESPONSEMAX4864 toc08IN FLAG 5V/divGATEN 5V/div ADAPTER 2µs/divI GATEN 10mA/div 5V 8V 5V 8VMAX4864L/MAX4865L/MAX4866L/MAX4867Overvoltage Protection Controllers with Reverse Polarity Protection_______________________________________________________________________________________5POWER-UP OVERVOLTAGE RESPONSEMAX4864 toc09IN FLAG GATEN ADAPTER 20ms/div8V 0V 8V 0V5V 0V 0VNEGATIVE VOLTAGE RESPONSEMAX4864 toc10GATEPFLAG IN ADAPTER 20ms/div0V0V 5V0V5V 0VPin DescriptionTypical Operating Characteristics (continued)(T A = +25°C, unless otherwise noted.)M A X 4864L /M A X 4865L /M A X 4866L /M A X 4867Overvoltage Protection Controllers with Reverse Polarity Protection 6_______________________________________________________________________________________Detailed DescriptionThe MAX4864L/MAX4865L/MAX4866L/MAX4867 provide up to +28V overvoltage and negative voltage protection for low voltage systems. When the input voltage exceeds the overvoltage trip level, the MAX4864L/MAX4865L/MAX4866L/MAX4867 turn off a low-cost external n-channel MOSFET to prevent damage to the protected compo-nents. The devices also drive an external p-channel MOSFET to protect against negative voltage inputs. An internal charge-pump (see the Functional Diagram ), drives the MOSFET GATEN for a simple, robust solution.On power-up, the device waits for 50ms before driving GATEN high. The open-drain FLAG output is kept at a high impedance for an additional 50ms after GATEN goes high before deasserting. The FLAG output asserts high immediately to an overvoltage fault.Undervoltage Lockout (UVLO)The MAX4864L/MAX4865L/MAX4866L/MAX4867 have a fixed +2.85V typical UVLO level, and the MAX4867has +2.5V UVLO level. When V IN is less than the UVLO,the GATEN driver is held low and FLAG is asserted.Overvoltage Lockout (OVLO)The MAX4864L has a +7.4V typical OVLO threshold;the MAX4865L has +6.35V typical OVLO threshold; the MAX4866L has a +5.8V typical OVLO threshold; and the MAX4867 has a +4.65V typical OVLO threshold.When V IN is greater than OVLO, the GATEN driver is held low and FLAG is asserted.FLAG OutputThe open-drain FLAG output is used to signal to the host system when there is a fault with the input voltage.On power-up, FLAG is held high for 50ms after GATEN turns on, before deasserting. FLAG asserts immediately to overvoltage and undervoltage faults. When the fault condition is removed, FLAG deasserts 50ms after GATEN turns on. Connect a pullup resistor from FLAG to the logic I/O voltage of the host system.GATEN DriverAn on-chip charge pump is used to drive GATEN above IN, allowing the use of a low-cost n-channel MOSFET. The charge pump operates from the internal +5.5V regulator.The actual GATEN output voltage tracks approximately two times V IN until V IN exceeds +5.5V, or the OVLO trip level is exceeded, whichever comes first. The MAX4864L has a +7.4V typical OVLO, therefore GATEN remains relatively constant at approximately +10.5V for +5.5V < V IN < +7.4V. The MAX4866L has a +5.8V typi-cal OVLO, but this can be as low as +5.5V. The GATENoutput voltage is a function of input voltage, as shown in the Typical Operating Characteristics .GATEP DriverWhen the input voltage drops below ground, GATEP goes high turning the external p-channel MOSFET off.When the input voltage goes above ground, GATEP pulls low and turns on the p-channel MOSFET. An inter-nal clamp protects the p-channel MOSFET by insuring that the GATEP-to-IN voltage does not exceed +16V when the input (IN) rises to +28V.Device OperationThe MAX4864L/MAX4865L/MAX4866L/MAX4867 have an on-board state machine to control device operation.A flowchart is shown in Figure 5. On initial power-up, if V IN < UVLO or if V IN > OVLO, GATEN is held at 0V and FLAG is high.If UVLO < V IN < OVLO, the device enters startup after a 50ms internal delay. The internal charge pump is enabled, and GATEN begins to be driven above V IN by the internal charge pump. FLAG is held high during startup until the FLAG blanking period expires, typically 50ms after the GATEN starts going high. At this point,the device is in its on-state.At any time if V IN drops below UVLO, FLAG is driven high and GATEN is driven to ground.Figure 5. State DiagramMAX4864L/MAX4865L/MAX4866L/MAX4867Overvoltage Protection Controllers with Reverse Polarity ProtectionApplications InformationMOSFET ConfigurationThe MAX4864L/MAX4865L/MAX4866L/MAX4867 can be used with either a complementary MOSFET configuration as shown in the Typical Operating Circuit , or can be con-figured with a single p-channel MOSFET and back-to-back n-channel MOSFETs as shown in Figure 6.The MAX4864L/MAX4865L/MAX4866L/MAX4867 can drive either a complementary MOSFET or a single p-channel MOSFET and back-to-back n-channel MOSFETs. The back-to-back configuration has almost zero reverse cur-rent when the adapter is not present or when the adapter voltage is below the UVLO threshold.If reverse current leakage is not a concern, a single MOSFET can be used. This approach has half the loss of the back-to-back configuration when used with simi-lar MOSFET types and is a lower cost solution. Notethat if the input is actually pulled low, the output will also be pulled low due to the parasitic body diode in the MOSFET. If this is a concern, then the back-to-back configuration should be used.MOSFET SelectionThe MAX4864L/MAX4865L/MAX4866L/MAX4867 are designed for use with a complementary MOSFET or sin-gle p-channel and dual back-to-back n-channel MOSFETs. In most situations, MOSFETs with RDS(ON)specified for a VGS of 4.5V work well. Also the V DS should be +30V for the MOSFET to withstand the full +28V IN range of the MAX4864L/MAX4865L/MAX4866L/MAX4867. Table 1 shows a selection of MOSFETs which are appropriate for use with the MAX4864L/MAX4865L/MAX4866L/MAX4867.IN Bypass ConsiderationsFor most applications, bypass ADAPTER to GND with a 1µF ceramic capacitor. If the power source has signifi-cant inductance due to long lead length, take care to prevent overshoots due to the LC tank circuit and pro-vide protection if necessary to prevent exceeding the +30V absolute maximum rating on IN.ESD Test ConditionsESD performance depends on a number of conditions. The MAX4864L/MAX4865L/MAX4866L/MAX4867 are specified for +/-15kV typical ESD resistance on IN when ADAPTER is bypassed to ground with a 1µF ceramic capacitor.Human Body ModelFigure 7shows the H uman Body Model, and Figure 8shows the current waveform it generates when dis-charged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest,which is then discharged into the device through a 1.5k Ωresistor.Figure 6. Back-to-Back External MOSFET ConfigurationTable 1. MOSFET SuggestionsM A X 4864L /M A X 4865L /M A X 4866L /M A X 4867Overvoltage Protection Controllers with Reverse Polarity Protection 8_______________________________________________________________________________________IEC 1000-4-2Since January 1996, all equipment manufactured and/or sold in the European Union has been required to meet the stringent IEC 1000-4-2 specification. The IEC 1000-4-2 standard covers ESD testing and perfor-mance of finished equipment. It does not specifically refer to ICs. The MAX4864L/MAX4865L/MAX4866L/MAX4867 help users design equipment that meets Level 3 of IEC 1000-4-2, without additional ESD-protec-tion components.The main difference between tests done using the H uman Body Model and IEC 1000-4-2 is higher peak current in IEC 1000-4-2. Because series resistance is lower in the IEC 1000-4-2 ESD test model (Figure 9), the ESD-withstand voltage measured to this standard is gen-erally lower than that measured using the Human Body Model. Figure 10shows the current waveform for the ±8kV IEC 1000-4-2 Level 4 ESD Contact Discharge test.The Air-Gap test involves approaching the device with a charger probe. The Contact Discharge method connects the probe to the device before the probe is energized.Chip InformationTRANSISTOR COUNT: 727PROCESS TECHNOLOGY: BiCMOSFigure 7. Human Body ESD Test ModelFigure 8. Human Body Current WaveformFigure 10. IEC 1000-4-2 ESD Generator Current WaveformFigure 9. IEC 1000-4-2 ESD Test ModelMAX4864L/MAX4865L/MAX4866L/MAX4867Overvoltage Protection Controllers with Reverse Polarity Protection_______________________________________________________________________________________9Functional DiagramM A X 4864L /M A X 4865L /M A X 4866L /M A X 4867Overvoltage Protection Controllers with Reverse Polarity Protection 10______________________________________________________________________________________Package Information(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)Package Information (continued)MAX4864L/MAX4865L/MAX4866L/MAX4867Overvoltage Protection Controllers with Reverse Polarity Protection (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages.)______________________________________________________________________________________11M A X 4864L /M A X 4865L /M A X 4866L /M A X 4867Overvoltage Protection Controllers with Reverse Polarity ProtectionMaxim 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.12____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600©2006 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.6L S O T .E P SPackage Information (continued)(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information,go to /packages .)。