元器件交易网www.cecb2b.comTL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999DPower-On Reset GeneratorDAutomatic Reset Generation After VoltageDDDDDDropWide Supply-Voltage RangePrecision Voltage SensorTemperature-Compensated VoltageReferenceTrue and Complement Reset OutputsExternally Adjustable Pulse DurationD OR P PACKAGE(TOP VIEW)REFRESINCTGND12348765VCCSENSERESETRESETdescriptionThe TL77xxA family of integrated-circuit supply-voltage supervisors is specifically designed for use as resetcontrollers in microcomputer and microprocessor systems. The supply-voltage supervisor monitors the supplyfor undervoltage conditions at the SENSE input. During power up, the RESET output becomes active (low)when VCC attains a value approaching 3.6 V. At this point (assuming that SENSE is above VIT+), the delay timerfunction activates a time delay, after which outputs RESET and RESET go inactive (high and low, respectively).When an undervoltage condition occurs during normal operation, outputs RESET and RESET go active. Toensure that a complete reset occurs, the reset outputs remain active for a time delay after the voltage at theSENSE input exceeds the positive-going threshold value. The time delay is determined by the value of theexternal capacitor CT: td = 1.3 × 104 × CT, where CT is in farads (F) and td is in seconds (s).During power down (assuming that SENSE is below VIT–), the outputs remain active until the VCC falls belowa maximum of 2 V. After this, the outputs are undefined.An external capacitor (typically 0.1 µF for the TL77xxAC and TL77xxAI) must be connected to REF to reducethe influence of fast transients in the supply voltage.The TL77xxAC series is characterized for operation from 0°C to 70°C. The TL77xxAI series is characterizedfor operation from –40°C to 85°C.AVAILABLE OPTIONSPACKAGED DEVICESTASMALLOUTLINE(D)TL7702ACDTL7705ACDTL7709ACDTL7712ACDTL7715ACDTL7702AIDTL7705AIDTL7709AIDTL7712AIDTL7715AIDPLASTICDIP(P)TL7702ACPTL7705ACPTL7709ACPTL7712ACPTL7715ACPTL7702AIPTL7705AIPTL7709AIPTL7712AIPTL7715AIPCHIPFORM(Y)TL7702ACYTL7705ACYTL7709ACYTL7712ACYTL7715ACY—————0°C to 70°C–40°C to 85°CThe D package is available taped and reeled. Add the suffix R to thedevice type (e.g., TL7702ACDR). Chip forms are tested at 25°C.Please be aware that an important notice concerning availability, standard warranty, and use in critical applications ofTexasInstruments semiconductor products and disclaimers thereto appears at the end of this data sheet.PRODUCTION DATA information is current as of publication date.Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily includetesting of all parameters.Copyright © 1999, Texas Instruments IncorporatedPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•1元器件交易网www.cecb2b.comSLVS028E – APRIL 1983 – REVISED JULY 1999TL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS functional block diagramThe functional block diagram is shown for illustrative purposes only; the actual circuit includes a trimmingnetwork to adjust the reference voltage and sense-comparator trip point.VCC8ReferenceVoltageCTSENSE37R1(see Note A)≈100 µA6RESET5RESETR2(see Note A)RESIN21GND4REFNOTES:A.TL7702A: R1 = 0 Ω, R2 = openTL7705A: R1 = 7.8 kΩ, R2 = 10 kΩTL7709A: R1 = 19.7 kΩ, R2 = 10 kΩTL7712A: R1 = 32.7 kΩ, R2 = 10 kΩTL7715A: R1 = 43.4 kΩ, R2 = 10 kΩB.Resistor values shown are nominal.timing diagramVCC and SENSEThreshold VoltageVCC ≈ 3.6 VVCC ≈ 2 VRESETtdtdOutputUndefinedOutputUndefined2POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.comTL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999absolute maximum ratings over operating free-air temperature (unless otherwise noted)†Supply voltage, VCC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 VInput voltage range, VI, RESIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 VInput voltage range, VI, SENSE:TL7702A (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 6 VTL7705A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 VTL7709A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 VTL7712A, TL7715A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V to 20 VHigh-level output current, IOH, RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30 mALow-level output current, IOL, RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 mAPackage thermal impedance, θJA (see Notes 3 and 4):D package . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97°C/WP package . . . . . . . . . . . . . . . . . . . . . . . . . . . 127°C/WLead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D or P package . . . . . . . . . . . . . . . . . 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°CStorage temperature range, Tstg †Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, andfunctional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is notimplied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.NOTES:1.All voltage values are with respect to the network ground terminal.2.For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed VCC – 1 V or 6 V, whicheveris less.3.Maximum power dissipation is a function of TJ(max), θJA, and TA. The maximum allowable power dissipation at any allowableambient temperature is PD = (TJ(max) – TA)/θJA. Operating at the absolute maximum TJ of 150°C can impact reliability.4.The package thermal impedance is calculated in accordance with JESD 51, except for through-hole packages, which use a tracelength of zero.recommended operating conditionsMINSupply voltage, VCCHigh-level input voltage at RESIN, VIHLow-level input voltage at RESIN, VILTL7702ATL7705AInput voltage, SENSE, VITL7709ATL7712ATL7715AHigh-level output current, RESET, IOHLow-level output current, RESET, IOLTiming capacitor, CTOperating free-air temperature range, TOperatingfreeairtemperaturerangeTATL77xxACTL77xxAI0–40000003.520.6See Note 210152020–1616107085mAmAµF°CVMAX18UNITVVVNOTE 2:For proper operation of the TL7702A, the voltage applied to the SENSE terminal should not exceed VCC – 1 V or 6 V, whichever is less.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•3元器件交易网www.cecb2b.comSLVS028E – APRIL 1983 – REVISED JULY 1999TL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS electrical characteristics over recommended operating conditions (unless otherwise noted)PARAMETERVOHVOLVrefHigh-level output voltage, RESETLow-level output voltage, RESETReference voltageTL7702ATL7705AVIT–Negative-going input threshold voltage,NtiiitthhldltSENSETL7709ATL7712ATL7715ATL7702ATL7705AVhysyHysteresis, SENSE (VIT+ – VIT–)TL7709ATL7712ATL7715AIIIOHIOLInput currentRESINSENSEHigh-level output current, RESETLow-level output current, RESETTL7702AVI = 2.4 V to VCCVI = 0.4 VVref < VI < VCC – 1.5 VVO = 18 VVO = 0All inputs and outputs open0.5TA = 25°CTA = 25°CTEST CONDITIONS†IOH = –16 mAIOL = 16 mATA = 25°CTL77xxACTL77xxAIMINVCC–1.50.42.482.484.57.510.613.22.532.534.557.610.813.5101520354520–100250–501.83µAµAmAµAmV2.582.584.67.71113.8VTYPMAXVVVUNITICCSupply current†All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT, and VCC to GND.switching characteristics over recommended operating conditions (unless otherwise noted)PARAMETEROutput pulse durationInput pulse duration at RESINtw(S)tpdtrtfPulse durationat SENSE input to switch outputsPropagation delay time, RESIN to RESETRisetimeRise timeRESETRESETRESETRESETVIH = VIT– +200 mV,VCC = 5 V=5VVCC = 5 V,VCC = 5 V,=5VSeeNote5See Note 5VIL = VIT– –200 mVCT = 0.1 µFTEST CONDITIONS‡TL77xxACTL77xxAIMIN0.650.4210.23.53.50.2TYP1.2MAX2.6µsµsµsµsµsµsUNITFalltimeFall timeSeeNote5See Note 5‡All switching characteristics are measured with 0.1-µF capacitors connected at REF and VCC to GND.NOTE 5:The rise and fall times are measured with a 4.7-kΩ load resistor at RESET and RESET.4POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.comTL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999electrical characteristics over recommended operating conditions, TA = 25°C (unless otherwisenoted)PARAMETERVrefReference voltageTL7702ATL7705AVIT–Negative-going input threshold voltage, SENSETL7709ATL7712ATL7715ATL7702ATL7705AVhysyHysteresis, SENSE (VIT+ – VIT–)TL7709ATL7712ATL7715AIIICCInput current, SENSESupply currentTL7702AVref < VI < VCC – 1.5 VAll inputs and outputs openTEST CONDITIONSTESTCONDITIONS†TL77xxAYMINTYP2.532.534.557.610.813.510152035450.51.8µAmAmVVMAXUNITV†All electrical characteristics are measured with 0.1-µF capacitors connected at REF, CT, and VCC to GND.switching characteristics over recommended operating conditions, TA = 25°C (unless otherwisenoted)PARAMETERTEST CONDITIONSTESTCONDITIONS‡TL77xxAYMINTYP1.2MAXUNITµstdOutput pulse time delayCT = 0.1 µF‡All switching characteristics are measured with 0.1-µF capacitors connected at REF and VCC to GND.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•5元器件交易网www.cecb2b.comSLVS028E – APRIL 1983 – REVISED JULY 1999TL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS PARAMETER MEASUREMENT INFORMATIONVoltageDroptw(S)SENSEVIT+VIT–VIT+0 VVIHRESINUndefined0.7 Vtf90%RESET10%td90%RESET10%tr10%10%50%10%VOL(RESET)tftdtrtpd90%50%2 VVIL90%VOH(RESET)tdFigure 1. Voltage Waveforms6POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.comTL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999TYPICAL CHARACTERISTICS†ASSERTION TIMEvsLOAD RESISTANCE42VCC = 5 VCT = 0.1 µFCL = 10 pFTA = 25°C76t – Deassertion Time –µs54RESET tf32RESET trRESET tf1002846RL – Load Resistance – kΩ1002468RL – Load Resistance – kΩ10VCC = 5 VCT = 0.1 µFCL = 10 pFTA = 25°CDEASSERTION TIMEvsLOAD RESISTANCE38t – Assertion Time – ns3430RESET tr262218Figure 2Figure 3ASSERTION TIMEvsLOAD CAPACITANCE44VCC = 5 VCT = 0.1 µFRL = 4.7 kΩTA = 25°CDEASSERTION TIMEvsLOAD CAPACITANCE3.63.2t – Deassertion Time –µs2.82.421.61.20.8RESET trRESET tfVCC = 5 VCT = 0.1 µFRL = 4.7 kΩTA = 25°C40t – Assertion Time – ns36RESET tr322824RESET tf200255075100125150CL – Load Capacitance – pF1752000255075100125150175200CL – Load Capacitance – pFFigure 4Figure 5†For proper operation, both RESET and RESET should be terminated with resistors of similar value. Failure to do so may cause unwantedplateauing in either output waveform during switching.POST OFFICE BOX 655303 DALLAS, TEXAS 75265•7元器件交易网www.cecb2b.comSLVS028E – APRIL 1983 – REVISED JULY 1999TL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS APPLICATION INFORMATION5 V12 V8VCC7SENSE25RESETRESINTL7712A3RESETCTGNDCTGND872VCCSENSERESINRESET5TL7712A6RESET1REFCTGND40.1 µFCT(F)+td(s)1.3 10440.1 µFREF6110 kΩCT22 kΩ7210 kΩ3CT8VCCSENSERESINRESET510 kΩSystem ResetTL7705A6RESET1REFGND40.1 µF10 kΩ310 kΩCT–12 VFigure 6. Multiple Power-Supply System Reset Generation5 V8VCC7SENSE25RESETRESINCT(F)+td(s)1.3 104TL7705A6RESET31CTREFGNDCTGND410 kΩVCCRESETTMS700010 kΩ0.1 µFVSSFigure 7. Reset Controller for TMS7000 System8POST OFFICE BOX 655303 DALLAS, TEXAS 75265•元器件交易网www.cecb2b.comTL7702A, TL7705A, TL7709A, TL7712A, TL7715ASUPPLY-VOLTAGE SUPERVISORS SLVS028E – APRIL 1983 – REVISED JULY 1999APPLICATION INFORMATION5 VµA7805INPUTInputCOMMONOUTPUT8VCC7SENSERESET5TL7705A6RESET1CTREFGNDCT40.1 µFG4.7 kΩ25 kΩSystem RESETSQ12N3994D4.7 kΩ3CICOFigure 8. Eliminating Undefined States Using a P-Channel JFETVCC10 kΩ750 ΩQ12N40368SENSE Input723VCC5RESETSENSETL77xxARESINCTGNDCT40.1 µFRESETREF612.7 kΩSystem RESET10 kΩ1 kΩFigure 9. Eliminating Undefined States Using a pnp TransistorPOST OFFICE BOX 655303 DALLAS, TEXAS 75265•9元器件交易网www.cecb2b.com
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