TC623 3V, Dual Trip Point Temperature Sensor Features Package Type • IntegratedTempSensorandDetectorOperate SOIC fromaSupplyVoltageasLowas2.7V (cid:127) ReplacesMechanicalThermostatsandSwitches NC 1 8 VCC (cid:127) On-ChipTemperatureSense LOW SET 2 TC623CCOA 7 LOW LIMIT (cid:127) 8-PinDIPorSOICforDirectPCBMounting HIGH SET 3 TTCC662233CCEVOOAA 6 HIGH LIMIT GND 4 5 CONTROL (cid:127) 2UserProgrammableTemperatureSetPoints (cid:127) 2IndependentTemperatureLimitOutputs PDIP (cid:127) Heat/CoolRegulateOutput NC 1 8 VCC Applications LOW SET 2 7 LOW LIMIT TC623CCPA (cid:127) CPUThermalManagement TC623CEPA HIGH SET 3 6 HIGH LIMIT (cid:127) SystemOverorUnderTemperatureShutdown (cid:127) AdvancedThermalWarning GND 4 5 CONTROL (cid:127) FanSpeedControlCircuits (cid:127) AccurateApplianceTemperatureSensing General Description (cid:127) EnvironmentalControl TheTC623isa3Vsolid-state,programmabletemper- aturesensordesignedforuseinthermalmanagement Device Selection Table applications. It features dual thermal interrupt outputs (LOW LIMIT and HIGH LIMIT) each of which are set PartNumber Package Temp.Range with an external resistor. The HIGH LIMIT and LOW TC623CCOA 8-PinSOIC 0°Cto+70°C LIMIToutputsaredrivenactive(high)whenmeasured TC623CCPA 8-PinPDIP 0°Cto+70°C temperature equals the user programmed limits. The CONTROLoutputisdrivenactive(high)whentemper- TC623CEOA 8-PinSOIC -40°Cto+85°C ature equals the HIGH LIMIT set point and turned off TC623CEPA 8-PinPDIP -40°Cto+85°C whentemperaturefallsbelowtheLOWLIMITsetpoint. TC623CVOA 8-PinSOIC -40°Cto+125°C The CONTROL output can beusedtoprovide simple ON/OFFcontroltoacoolingfanifsodesired. NOTE:LatchOutput(Coption),isaStandardDevice.Con- tactFactoryforLatchQOutput(Hoption). Low voltage operation, easy set point programming, small size and low cost make the TC623 an ideal FunctionalBlock Diagram choiceformanythermalmanagementapplications. NC 1 Temperature 8VCC To Voltage TC623 Converter + 7 LOW SET 2 VGReEn.F – LOW LIMIT VREF + 6 HIGH LIMIT HIGH SET 3 VGReEn.F – 5 GND 4 LRatchSQ CONTROL RL O W < RHIGH  2002MicrochipTechnologyInc. DS21441B-page 1

TC623 1.0 ELECTRICAL *Stressesabovethoselistedunder"AbsoluteMaximumRat- ings"maycausepermanentdamagetothedevice.Theseare CHARACTERISTICS stressratings only and functional operation of the device at these or any other conditions above those indicated in the Absolute Maximum Ratings* operationsectionsofthespecificationsisnotimplied.Expo- sure to Absolute Maximum Rating conditions for extended SupplyVoltage......................................................5.5V periodsmayaffectdevicereliability. InputVoltageAnyInput..(GND–0.3V)to(V +0.3V) DD PackagePowerDissipation(T ≤70°C) A PlasticDIP.............................................730mW SOIC......................................................470mW DeratingFactors PlasticDIP............................................8mW/°C SOIC.....................................................6mW/°C OperatingTemperature VVersion.................................-40°Cto+125°C EVersion...................................-40°Cto+85°C CVersion......................................0°Cto+70°C StorageTemperature..........................-65°Cto+150°C TC623ELECTRICALSPECIFICATIONS ElectricalCharacteristics:OverOperatingTemperatureRange,V =2.7Vto4.5V,unlessotherwisespecified. DD Symbol Parameter Min Typ. Max Unit TestConditions V SupplyVoltageRange 2.7 — 4.5 V DD I SupplyCurrent — 150 250 µA 2.7V≤V ≤4.5V DD DD T AbsoluteAccuracy T- 3 T±1 T+3 °C T=ProgrammedTemperature SET V OutputVoltageHigh 0.9xV — — V I =250µA OH DD OH 0.8xV — — V I =500µA DD OH V OutputVoltageLow — — 0.1xV V I =500 µA OL DD OL — — 0.2xV V I =1mA DD OL HYS Hysteresis — — -2 °C FallingTemperature  DS21441B-page 2 2002MicrochipTechnologyInc.

TC623 2.0 PIN DESCRIPTION ThedescriptionsofthepinsarelistedinTable2-1. TABLE 2-1: PINFUNCTIONTABLE PinNo. (8-PinSOIC) Symbol Description (8-PinPDIP) 1 NC NoInternalConnection. 2 LOWSET Lowtemperaturesetpoint.Connectanexternal1%resistorfromLOWSETtoV DD tosettrippoint. 3 HIGHSET Hightemperaturesetpoint.Connectanexternal1%resistorfromHIGHSETto V tosettrippoint. DD 4 GND GroundTerminal. 5 CONTROL Controloutput. 6 HIGHLIMIT Hightemperaturepush/pulloutput. 7 LOWLIMIT Lowtemperaturepush/pulloutput. 8 V Powersupplyinput. CC  2002MicrochipTechnologyInc. DS21441B-page 3

TC623 3.0 DETAILED DESCRIPTION The CONTROL output is driven high when the HIGH LIMIT output goes high and is RESET low when the 3.1 TC623 Operation LOW LIMIT output goeslow. Thisoutput providesthe logicforsimpleON/OFFfancontrol.Figure3-2shows The TC623 has a positive temperature coefficient overallTC623operation. (Silicon)temperaturesensoranddualthresholddetec- tor. Temperature set point programming is accom- FIGURE3-2: TC623TEMPERATURE plishedwithexternalresistorsfromtheHIGHSETand VS.OUTPUT LOW SET inputs to V . The HIGH LIMIT and LOW CC LIMIT outputs remain inactive (low) as long as the High Set Point measured temperature is below set point values. As Temperature temperature increases, the LOW LIMIT is driven high Low Set Point when temperature equals the LOW LIMIT set point Low Limit Output (±3°C). If temperature continues to climb, the HIGH High Limit Output LIMIT output is driven high when temperature equals theHIGHLIMITsetpoint(±3°C). Control Output (Cool Option) Figure3-1 shows the relationship between the sense Topreventoutput"chattering"whenmeasuredtemper- resistancevaluesandtrippointtemperature. atureisat(ornear)thetrippointvalues,theLOWSET andHIGHSETinputseachhaveabuilt-inhysteresisof FIGURE3-1: TC623SENSE -2°Cmax.Asaresult,theHIGHLIMITandLOWLIMIT RESISTORS VS.TRIP outputsremain active until themeasuredtemperature TEMPERATURE fallsa maximum of 2°C belowthe programmed HIGH SETandLOWSETthresholdsasshowninFigure3-3. 250 TheprogrammedsettingthresholdofFigure3-3isuser Ω) programmedtemperaturetrippointsofeithertheLOW (kP 200 SET or HIGH SET inputs. The LOW LIMIT or HIGH RI RT LIMIToutputisdrivenactivewhentemperatureequals E, 150 C thesetpointvalue(towithin3°C).Theoutputremains N TA active until the temperature falls an additional 2°C S ESI 100 belowthesetpointduetohysteresis. R 50 FIGURE3-3: HIGHSETANDLOWSET -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (˚C) THRESHOLDS Programmed Setpoint -2˚C Hysteresis High Limit or Low Limit Ouput  DS21441B-page 4 2002MicrochipTechnologyInc.

TC623 4.0 TYPICAL APPLICATIONS 4.1 Mounting If the TC623 is used to measure the temperature of anotherdevice,itisimportantthatthetopsurfaceofthe TC623 package be in intimate contact with the measureddevice.Goodthermalconductivityandnoair spaceiscriticaltoaccuratetemperaturemeasurement inapplicationsofthistype. 4.2 Trip Point Programming Theresistancevaluesrequiredfor theHIGHSETand LOW SET inputs are calculated using the formula below: R =0.5997xT2.1312 TRIP Where; R =ProgrammingresistorvalueinOhms TRIP T=DesiredtriptemperatureindegreesKelvin. For example, to programatrippointof 50°C,thepro- grammingresistoris: R =0.5997x(50+273.15)2.1312)=133.65kΩ TRIP  2002MicrochipTechnologyInc. DS21441B-page 5

TC623 5.0 PACKAGING INFORMATION 5.1 Package Marking Information Packagemarkingdatanotavailableatthistime. 5.2 Taping Form Component Taping Orientation for 8-Pin SOIC (Narrow) Devices User Direction of Feed PIN 1 W P Standard Reel Component Orientation for TR Suffix Device Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 8-Pin SOIC (N) 12 mm 8 mm 2500 13 in 5.3 Package Dimensions 8-Pin SOIC PIN1 .157 (3.99) .244 (6.20) .150 (3.81) .228 (5.79) .050 (1.27) TYP. .197 (5.00) .189 (4.80) .069 (1.75) .053 (1.35) 8°MAX.. .010 (0.25) .007 (0.18) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) .050 (1.27) .016 (0.40) Dimensions: inches (mm)  DS21441B-page 6 2002MicrochipTechnologyInc.

TC623 Package Dimensions (Continued) 8-Pin Plastic DIP PIN1 .260 (6.60) .240 (6.10) .045 (1.14) .070 (1.78) .030 (0.76) .040 (1.02) .310 (7.87) .400 (10.16) .290 (7.37) .348 (8.84) .200 (5.08) .140 (3.56) .040 (1.02) .020 (0.51) .015 (0.38) 3°MIN. .150 (3.81) .008 (0.20) .115 (2.92) .400 (10.16) .310 (7.87) .110 (2.79) .022 (0.56) .090 (2.29) .015 (0.38) Dimensions: inches (mm)  2002MicrochipTechnologyInc. DS21441B-page 7

TC623 NOTES:  DS21441B-page 8 2002MicrochipTechnologyInc.

TC623 SALES AND SUPPORT DataSheets ProductssupportedbyapreliminaryDataSheetmayhaveanerratasheetdescribingminoroperationaldifferencesandrecom- mendedworkarounds.Todetermineifanerratasheetexistsforaparticulardevice,pleasecontactoneofthefollowing: 1. YourlocalMicrochipsalesoffice 2. TheMicrochipCorporateLiteratureCenterU.S.FAX:(480)792-7277 3. TheMicrochipWorldwideSite(www.microchip.com) Pleasespecifywhichdevice,revisionofsiliconandDataSheet(includeLiterature#)youareusing. NewCustomerNotificationSystem Registeronourwebsite(www.microchip.com/cn)toreceivethemostcurrentinformationonourproducts.  2002MicrochipTechnologyInc. DS21441B-page 9

TC623 NOTES:  DS21441B-page 10 2002MicrochipTechnologyInc.

TC623 Information contained in this publication regarding device Trademarks applicationsandthelikeisintendedthroughsuggestiononly andmaybesupersededbyupdates.Itisyourresponsibilityto The Microchip name and logo, the Microchip logo, FilterLab, ensure that your application meets with your specifications. KEELOQ, microID, MPLAB, PIC, PICmicro, PICMASTER, No representation or warranty is given and no liability is PICSTART,PROMATE, SEEVAL and TheEmbedded Control assumedbyMicrochipTechnologyIncorporatedwithrespect SolutionsCompanyareregisteredtrademarksofMicrochipTech- totheaccuracyoruseofsuchinformation,orinfringementof nologyIncorporatedintheU.S.A.andothercountries. patentsorotherintellectualpropertyrightsarisingfromsuch dsPIC,ECONOMONITOR,FanSense,FlexROM,fuzzyLAB, useorotherwise.UseofMicrochip’sproductsascriticalcom- In-Circuit Serial Programming, ICSP, ICEPIC, microPort, ponentsinlifesupportsystemsisnotauthorizedexceptwith Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM, expresswritten approvalbyMicrochip.Nolicensesarecon- MXDEV, PICC, PICDEM, PICDEM.net, rfPIC, Select Mode veyed,implicitlyorotherwise,underanyintellectualproperty andTotalEndurancearetrademarksofMicrochipTechnology rights. IncorporatedintheU.S.A. SerializedQuickTurnProgramming(SQTP)isaservicemark ofMicrochipTechnologyIncorporatedintheU.S.A. All other trademarks mentioned herein are property of their respectivecompanies. © 2002, Microchip Technology Incorporated, Printed in the U.S.A.,AllRightsReserved. Printedonrecycledpaper. MicrochipreceivedQS-9000qualitysystem certificationforitsworldwideheadquarters, designandwaferfabricationfacilitiesin ChandlerandTempe,ArizonainJuly1999 andMountainView,CaliforniainMarch2002. TheCompany’squalitysystemprocessesand proceduresareQS-9000compliantforits PICmicro®8-bitMCUs,KEELOQ®codehopping devices,SerialEEPROMs,microperipherals, non-volatilememoryandanalogproducts.In addition,Microchip’squalitysystemforthe designandmanufactureofdevelopment systemsisISO9001certified.  2002MicrochipTechnologyInc. DS21441B-page11

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Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M icrochip: TC623CCOA TC623CCPA TC623CVOA TC623CEOA TC623CEPA TC623CVOA713 TC623CEOA713 TC623CCOA713