圣邦微SGM706S-深圳恒锐丰科技

SGM706S-PinMicroprocessorSupervisoryCircuitithWatchdogTimerandManualReset

GENERALDESCRIPTION

FEATURES

TheSGM706SisanintegratedmicroprocessorsupervisorydeviceComparedwiththedesignusingasingleICordiscretecomponents,thisintegrationdesignhastheadvantageofimprovingsystemstabilityandaccuracyTheSGM706Scanberesetunderpower-up,power-downorevenvoltagereductionbrownoutconditionsWhenVCCisaslowas1V,theresetoutputcanstilloperateAnditalsohasalow-levelactivemanualresetnMRfunction

●Ultra-LowSupplyCurrent:<1μA(TYP)●PrecisionSupply-VoltageMonitor

4.63VforSGM706S-L

4.38VforSGM706S-M

4.0VforSGM706S-J

3.08VforSGM706S-T

2.93VforSGM706S-S

2.63VforSGM706S-R

2.32VforSGM706S-Z

TheSGM706Sprovidesanindependentwatchdogmonitoringcircuit,whichisactivatedwhenitsWDIinputhasnottoggledformorethan168s

Whenthepowersupplyfails,thebatterypowerislow,ortheadditionalpowersupplyneedstobemonitored,itcanberealizedbythe125VthresholddetectoroftheSGM706S

TheSGM706SisavailableinaGreenSOIC-8packageItoperatesoveranjunctiontemperaturerangeof-40℃to+125℃

TYPICALAPPLICATION

Supply

Voltage

R1

R2

SGM706SµCCCMRFIWDOPFOWDIVCCwitchI/OMINTERRUPTRESETnRESETND5VRegulator2GND

1.63VforSGM706S-X

●GuaranteednRESETValidatVCC=1V●210msResetPulseWidth

●DebouncedTTL/CMOS-Compatible

●ManualResetInput

●WatchdogTimerwith1.68sTimeout●VoltageMonitorforPower-FailorLow-Battery

Warning

●-40℃to+125℃OperatingTemperatureRange●AvailableinaGreenSOIC-8Package

APPLICATIONS

Computers

Battery-PoweredApplicationsPortableEquipmentAutomotiveEquipmentSafetySystems

IntelligentInstrumentsCriticalμCPowerMonitoringMicroprocessorSystems

Figure1.TypicalApplicationCircuit

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SGMicroCorp.sg-micro

NOVEMBER2023–REV.A

8-PinMicroprocessorSupervisoryCircuitSGM706SwithWatchdogTimerandManualReset

PACKAGE/ORDERINGINFORMATION

MODELRESETHRESHOLDV)PACKAGEESCRIPTIONSPECIFIEDEMPERATUREANGEORDERINGUMBERPACKAGEARKINGPACKINGPTIONGM706S-L463SOIC-8-40℃to+125℃SGM706S-LXS8G/TR0OCXS8XXXXTapeandReel,4000GM706S-M438SOIC-8-40℃to+125℃SGM706S-MXS8G/TR0EEXS8XXXXTapeandReel,4000GM706S-J40SOIC-8-40℃to+125℃SGM706S-JXS8G/TR0OBXS8XXXXTapeandReel,4000GM706S-T308SOIC-8-40℃to+125℃SGM706S-TXS8G/TR0ODXS8XXXXTapeandReel,4000GM706S-S293SOIC-8-40℃to+125℃SGM706S-SXS8G/TR033XS8XXXXTapeandReel,4000GM706S-R263SOIC-8-40℃to+125℃SGM706S-RXS8G/TR032XS8XXXXTapeandReel,4000GM706S-Z232SOIC-8-40℃to+125℃SGM706S-ZXS8G/TR0OEXS8XXXXTapeandReel,4000GM706S-X163SOIC-8-40℃to+125℃SGM706S-XXS8G/TR0EFXS8XXXXTapeandReel,4000

MARKINGINFORMATION

NOTE:XXXXX=TraceCodeandDateCode

XXX

TraceCodeendorCode

DateCode-Year

Green(RoHS&HSF):SGMicroCorpdefines"Green"tomeanPb-Free(RoHScompatible)and free of halogen substances If you have additional comments or questions,please contact your SGMICRO representative directly

ABSOLUTE MAXIMUM RATINGS

Terminal Voltage(With Respect to GND)

VCC -03V to 60V

Al l Other Inputs -03V to(VCC+03V)Input Current

VCC 20mA

GND 20mA Output Current

Al lOutputs 20mA Package Thermal Resistance

SOIC-8,θJA 1508℃/W SOIC-8,θJB 1045℃/W SOIC-8,θJC 979℃/W Junction Temperature +150℃Storage Temperature Range -65℃to+150℃Lead Temperature(Soldering, 10s) +260℃ESD Susceptibi l ity

HBM 4000V CDM 1000V

RECOMMENDED OPERATING CONDITIONS Operating Junction Temperature Range -40℃to+125℃

OVERSTRESS CAUTION

Stresses beyond those l isted in Absolute Maximum Ratings may cause permanent damage to the device Exposureto absolute maximum rating conditions for extended periods may affect rel iabi l ity Functional operation of the device at any conditions beyond those indicated in the Recommended Operating Conditions sectionis not impl ied

ESD SENSITIVITY CAUTION

This integrated circuit can be damaged if ESD protections are not considered careful ly SGMICRO recommends that al l integrated circuits be handled with appropriate precautions Fai lureto observe proper handl ingand instal lation procedures can cause damage ESD damage can range from subtle performancedegradation tocomplete device fai lure Precision integrated circuits may be more susceptible to damage because even smal l parametric changes could cause the device not to meet the publ ished specifications

DISCLAIMER

SG Micro Corp reserves the right to make any change in circuitdesign,or specificationswithout prior notice

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NOVEMBER 2023G Micro Corp 2ww.sg-m icro

8-Pin Microprocessor Supervisory Circuit SGM706S withWatchdogTimerandManualReset

PIN CONFIGURATION

nMR

VCC

GND

PFI

(TOP VIEW)

1423 587 W SOIC-8

nWDO

nRESET

WDI

nPFO

PIN DESCRIPTION

PIN NAME FUNCTION nMR Manual Reset Input Pin It is an active-low reset input with an internal 200μA(VCC=+5V)pul l-upurrent nMR can be driven by a CMOS/TTL logic or by a switch shorting to GND If not used,eave itopen orconnect it to VCC VCC SupplyVoltage Pin GND Ground PFI Power-Fai l Voltage Monitor Input Pin nPFO goes low when PFI is lower than 1 25V If not used,onnect PFI to GND orVCC nPFO Power-Fai l Voltage Monitor Output Pin nPFO goes low when PFI is lower than 1 25V nPFOemains high when PFI is more than 1 25V WDI (1) Watchdog Input Pin If the WDI remains high or low for longer than the watchdog timeout period1 68s,TYP), the internal watchdog timerwi l l expire and nWDO wi l l go low The internal watchdogimer is kept clearwhi le a reset is asserted orWDI is three-stated The timer is also cleared if theDI input is changed(on rising orfal l ing edges) Thewatchdog feature is disabled if theWDI is leftpen or if it is connected to a three-stated bufferoutput nRESET Active-Low Reset Output Pin It del ivers a 210ms (TYP) low pulse when activated nRESET wi l lemain low if VCC is below the reset threshold or nMR is logic low It goes (or remains) low for10ms afteranyof the fol lowing events:VCC rises above the reset threshold orthe nMR inputgoesrom lowto high nWDO Watchdog Output Pin If WDI can not reach a rising edge or a fal l ing edge in 1 68s, the watchdogimer wi l l timeout Meanwhi le, nWDO is pul led low and remains low unti l the watchdog timer isleared nWDO goes lowwhen VCC is belowthe reset threshold nWDO is different from nRESETn that it does not have a minimum pulse width As long as VCCis higher than the reset threshold,WDO wi l l immediatelygo high

NOTE: If it requires the SGM706S to switch WDI from normal state to disable state,ensure that the WDI enters the high-Z state from high level

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NOVEMBER 2023G Micro Corp 3ww.sg-m icro

8-Pin Microprocessor Supervisory Circuit SGM706S withWatchdogTimerandManualReset

ELECTRICAL CHARACTERISTICS

(VCC=4780V to 55V for L Model ;VCC=4520V to 55V for M Model ;VCC=4130V to 55V for J Model ;VCC=3180V to 55V for T Model ;VCC=3025V to 55V for S Model ;VCC=2715V to 55V for R Model ;VCC=2395V for Z Model ;VCC= 1 685V for X Model ,TJ=-40℃to+125℃, typical values are at measured TJ=+25℃, unless otherwise noted)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSupplyperating Voltage Range VCC 1 0 55 VupplyCurrent ISUPPLY VCC=36V 09 1 87 μACC=55V 1 07 217 μARESETRESETThreshold VnRST SGM706S-L TJ=+25℃ 4520 463 4740 VJ=-40℃to+125℃ 4415 4780GM706S-M TJ=+25℃ 4275 438 4485J=-40℃to+125℃ 4180 4520GM706S-J TJ=+25℃ 3905 40 4095J=-40℃to+125℃ 3810 4130GM706S-T TJ=+25℃ 3005 308 3155J=-40℃to+125℃ 2930 3180GM706S-S TJ=+25℃ 2860 293 3000J=-40℃to+125℃ 2795 3025GM706S-R TJ=+25℃ 2565 263 2695J=-40℃to+125℃ 2525 2715GM706S-Z TJ=+25℃ 2265 232 2375J=-40℃to+125℃ 2225 2395GM706S-X TJ=+25℃ 1 590 1 63 1 670J=-40℃to+125℃ 1 565 1 685RESETThreshold Hysteresis VHYS SGM706S-L 20 mVGM706S-M 19GM706S-J 18GM706S-T 14GM706S-S 13GM706S-R 12GM706S-Z 1 1GM706S-X 8RESET PulseWidth tRS 70 210 340 msRESET OutputVoltage ISOURCE=800μA 07×VCC VSINK=32mA 04CC=1V, ISINK=50μA 03CCto nRESET Delay tRD VnRST-VCC=100mV 14 μs

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NOVEMBER 2023G Micro Corp 4ww.sg-m icro

8-Pin Microprocessor Supervisory Circuit SGM706S withWatchdogTimerandManualReset

ELECTRICAL CHARACTERISTICS(continued)

(VCC=4780V to 55V for L Model ;VCC=4520V to 55V for M Model ;VCC=4130V to 55V for J Model ;VCC=3180V to 55V for T Model ;VCC=3025V to 55V for S Model ;VCC=2715V to 55V for R Model ;VCC=2395V for Z Model ;VCC= 1 685V for X Model ,TJ=-40℃to+125℃, typical values are at measured TJ=+25℃, unless otherwise noted)

PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITSatchdogatchdogTimeoutPeriod tWD 056 1 68 272 sDI PulseWidth tWP VIL=0V,VIH=VCC 90 nsDI Low-Level InputVoltage VIL_WDI VnRST_MAX

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NOVEMBER 2023G Micro Corp 5ww.sg-m icro

8-Pin Microprocessor Supervisory Circuit SGM706S withWatchdogTimerandManualReset

TYPICAL PERFORMANCE CHARACTERISTICS VCC=33V, unless otherwise noted

nRESETOutputVoltagevs SupplyVoltage nRESETResponseTime

1V/i VCC 1V/iJ=+25℃ TJ=+25℃

VCC

nRESET

nRESET

1V/i i

1V/i i

Time(1s/div) Time(2μs/div)

PFI

Power-Fai l Comparator De-Assertion Responseime Power-Fai l ComparatorAssertion Response Time 10J=+25℃ TJ=+25℃mV/i PFI i

1

V/i i

nPFO

1

0

0m V/i i

nPFO

1V/i i

Time(2μs/div) Time(2μs/div)

WatchdogTiming nRESETandnWDOTiming

WDIWDO 1V/i1V/i VCCRESETWDO 1V/i2V/i2V/iWP tWD tRS

Time(1s/div) Time(100ms/div)

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NOVEMBER 2023G Micro Corp 6ww.sg-m icro

8-Pin Microprocessor Supervisory Circuit SGM706S withWatchdogTimerandManualReset

TYPICAL PERFORMANCE CHARACTERISTICS(continued)VCC=33V, unless otherwise noted

nRESETTiming

nMR

tMR

2V/i i

nRESET

2V/i i

Time(200ms/div)

FUNCTIONAL BLOCK DIAGRAM

WDI

nMR

VC C

PFI

Watchdogimeratchdogransitionetector- +- Time Base foreset andatchdogeseteneratorCC 200μAnRST 25V GND