TC622/TC624 Low Cost Single Trip Point Temperature Sensor Features: General Description: • Temperature Set Point Easily Programs with a The TC622 and TC624 are programmable solid-state Single External Resistor temperature sensors designed to replace mechanical (cid:129) Operates with 2.7V Power Supply (TC624) switches in sensing and control applications. Both devices integrate the temperature sensor with a (cid:129) TO-220 Package for Direct Mounting to Heatsink voltage reference and all required detector circuitry. (TC622XAT) or Standard 8-Pin PDIP and SOIC The desired temperature set point is set by the user with a single external resistor. Applications: Ambient temperature is sensed and compared to the (cid:129) Power Supply Over-Temperature Detection programmed set point. The OUT and OUT outputs are (cid:129) Consumer Electronics driven to their active state when the measured (cid:129) Fire/Heat Detection temperature exceeds the programmed set point. (cid:129) UPSs, Amplifiers, Motors The TC622 has a power supply voltage range of 4.5V (cid:129) CPU Thermal Management in PCs to 18.0V while the TC624 operates over a power supply range of 2.7V to 4.5V. Both devices are usable over a temperature range of -40°C to +125°C (TC622VXX, TC624VXX). Both devices feature low supply current making them suitable for portable applications. Eight-pin through-hole and surface mount packages are available. The TC622 is also offered in a 5-pin TO-220 package. The TC622 and TC624 are single point temperature detectors ideal for use in a wide variety of applications. Device Selection Table Part Number Voltage Operation Package Ambient Temperature TC622COA 4.5V to 18V 8-Pin SOIC 0°C to +70°C TC622CPA 4.5V to 18V 8-Pin PDIP 0°C to +70°C TC622EAT 4.5V to 18V 5-Pin TO-220 -40°C to +85°C TC622EOA 4.5V to 18V 8-Pin SOIC -40°C to +85°C TC622EPA 4.5V to 18V 8-Pin PDIP -40°C to +85°C TC622VAT 4.5V to 18V 5-Pin TO-220 -40°C to +125°C TC622VOA 4.5V to 18V 8-Pin SOIC -40°C to +125°C TC622VPA 4.5V to 18V 8-Pin PDIP -40°C to +125°C TC624COA 2.7V to 4.5V 8-Pin SOIC 0°C to +70°C TC624CPA 2.7V to 4.5V 8-Pin PDIP 0°C to +70°C TC624EOA 2.7V to 4.5V 8-Pin SOIC -40°C to +85°C TC624EPA 2.7V to 4.5V 8-Pin PDIP -40°C to +85°C TC624VOA 2.7V to 4.5V 8-Pin SOIC -40°C to +125°C TC624VPA 2.7V to 4.5V 8-Pin PDIP -40°C to +125° © 2006 Microchip Technology Inc. DS21440C-page 1

TC622/TC624 Package Type PDIP SOIC SOT-220 NC 1 8 NC NC 1 8 NC OUT 2 TC622COA 7 VDD OUT 2 TC622CPA 7 VDD OUT 3 TC622EOA 6 NC TC622EPA TC622VOA TC622EAT OUT 3 TC622VPA 6 NC GND 4 5 TSET TC622VAT GND 4 5 TSET 1 2 3 4 5 NC 1 8 NC NC 1 8 NC OUT 2 TC624COA 7 VDD OOUUTT 23 TTTCCC666222444CEVPPPAAA 67 VNDCD OGUNDT 34 TTCC662244EVOOAA 56 NTSCET OUTOUTVDD DNGTTES GND 4 5 TSET Note: For TO-220 Package, Pin 3 is connected to case heatsink. Functional Block Diagram +9V 9V Battery RSET Horn 7 1 VDD NC Microcontrollers 5 8 TSET NC TC622 TC624 3 6 OUT NC 4 2 GND OUT ALARM DS21440C-page 2 © 2006 Microchip Technology Inc.

TC622/TC624 1.0 ELECTRICAL Stresses above those listed under “Absolute Maximum CHARACTERISTICS 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 above Absolute Maximum Ratings* those indicated in the operation sections of the specifi- cations is not implied. Exposure to Absolute Maximum Supply Voltage (TC622).........................................20V Rating conditions for extended periods may affect (TC624)........................................5.5V device reliability. Input Voltage Any Input..(GND – 0.3V) to (V +0.3V) DD Operating Temperature......................-40°C to +125°C C Version..............................0°C to +70°C E Version...........................-40°C to +85°C V Version.........................-40°C to +125°C Storage Temperature.........................-65°C to +150°C . TC622/TC624 ELECTRICAL SPECIFICATIONS Electrical Characteristics: Over operating temperature range, unless otherwise specified. Sym Parameter Device Min Typ Max Unit Test Conditions V Supply Voltage TC622 4.5 — 18 V DD Range TC624 2.7 — 4.5 I Supply Current TC622 — 200 600 μA 5.0V ≤ V ≤ 18V DD DD TC624 — 170 300 2.7V ≤ V ≤ 4.5V DD V Output Voltage TC622 0.90 x V — — V 5.0V ≤ V ≤ 18V, -40°C ≤ T ≤ +125°C, OH DD DD A (High) I = 250 μA OH 0.80 x V — — I = 500 μA DD OH V Output Voltage TC622 — — 0.15 x V V -40°C ≤ T ≤ +85°C, I = 500 μA OL DD A OL (Low) — — 0.30 x V I = 1 mA DD OL — — 0.35 x V -40°C ≤ T ≤ +125°C, I = 1 mA DD A OL V Output Voltage TC624 — 2.7V ≤ V ≤ 4.5V OH DD (High) 0.90 x V — — V -40°C ≤ T ≤ +125°C, I = 250 μA DD A OH 0.80 x V — — I = 500 μA DD OH V Output Voltage TC624 — — 0.1 x V V -40°C ≤ T ≤ +85°C, I = 500 μA OL DD A OL (Low) — — 0.2 x V I = 1 mA DD OL — — 0.25 x V -40°C ≤ T ≤ +125°C, I = 1 mA DD A OL T Absolute Accuracy TC622 T - 5 T ± 1 T + 5 °C T = Programmed Temperature SET SET TC624 T - 5 T ± 1 T + 5 T = Programmed Temperature SET OUT Trip Point TC622 — 2 — °C Hysteresis TC624 — 2 — © 2006 Microchip Technology Inc. DS21440C-page 3

TC622/TC624 2.0 PIN DESCRIPTION The descriptions of the pins are listed in Table 2-1. TABLE 2-1: PIN FUNCTION TABLE Pin No. (8-Pin SOIC) Symbol Description (8-Pin PDIP) 1 NC No Internal Connection. 2 OUT Active low output. 3 OUT Active high output. 4 GND Ground Terminal. 5 T Temperature set point. Connect an external 1% resistor from T to V to set SET SET CC trip point. 6 NC No Internal Connection. 7 V Power supply input. DD 8 NC No Internal Connection. Pin No. Symbol Description (5-Pin SOT-220) 1 OUT Active low output. 2 OUT Active high output. 3 V Power supply input. DD 4 GND Ground Terminal. 5 T Temperature set point. Connect an external 1% resistor from T to V to set SET SET CC trip point. DS21440C-page 4 © 2006 Microchip Technology Inc.

TC622/TC624 3.0 DETAILED DESCRIPTION 3.2 Hysteresis To prevent output “chattering” at the trip point tempera- 3.1 Trip Point Programming ture, the temperature detector in the TC622/TC624 has 2°C hysteresis (see Figure3-2). The outputs are driven When the temperature of the device exceeds the pro- active when the temperature crosses the set point grammed temperature trip point, T , the OUT and SET determined by the external resistor. As temperature OUT outputs are driven into their active states. The declines below the set point, the hysteresis action will desired trip point temperature is programmed with a hold the outputs true until the temperature drops 2°C single external resistor connected between the T SET below the threshold. input and V . The relationship between the resistor CC value and the trip point temperature is given by Equation3-1. Temperature EQUATION 3-1: Set Point R = 0.5997 x T 2.1312 (Set Point – 2 Degrees C) TRIP Where: OUT R = Programming resistor value in Ohms TRIP T = Desired trip temperature in degrees Kelvin. For example, as shown in Figure3-1, to program the OUT device to trip at 50°C, the programming resistor is: FIGURE 3-2: TC622/TC624 Hysteresis R = 0.5997 x ((50 + 273.15)2.1312) = 133.65 kΩ TRIP 250 Ω) (k P 200 RI RT E, 150 C N A T SIS 100 E R 50 -55 -35 -15 5 25 45 65 85 105 125 TEMPERATURE (°C) FIGURE 3-1: Programming Resistor Values vs. Temperature © 2006 Microchip Technology Inc. DS21440C-page 5

TC622/TC624 4.0 TYPICAL APPLICATIONS 4.2 Cooling and Heating Applications The TC622/TC624 can be used to control a DC fan as 4.1 Over-Temperature Shutdown shown in Figure4-2. The fan turns on when the sensed temperature rises above T and remains on until the The TC622 can be used to create a simple over-tem- SET temperature falls below T - 2°C. perature shutdown circuit. In this circuit, temperature is SET sensed within the system enclosure (internal system Figure4-3 shows the TC622 acting as a heater ambient) or at the heatsink itself. When measured thermostat. Circuit operation is identical to that of the temperature exceeds a preset limit, a fault is indicated cooling fan application. and the system shuts down. Figure4-1 illustrates an over-temperature shutdown circuit using the TC622 sensor in a single TO-220 package, allowing direct attachment to the heatsink surface. As shown, the TC622 outputs are driven active when the heatsink temperature equals the trip point temperature set by R . When this happens, the TRIP crowbar circuit is activated, causing the supply output to fold back to zero. The TC622 outputs remain active until the heatsink temperature falls a minimum of 2°C (built-in hysteresis) below the trip point temperature, at which time the device again allows normal supply operation. Heatsink Output TC622 VCC Device Output Device VOUT Circuit Board RTRIP Power Good TC622 Heatsink Mounting Signal TC622 TSET VDD Crowbar OUT OVERTEMP Circuit GND OUT Heatsink Surface FIGURE 4-1: TC622 Power Supply Over-Temperature Shutdown DS21440C-page 6 © 2006 Microchip Technology Inc.

TC622/TC624 +2.7 to 4.5V +12V +4.5 to 18.0V +12V RSET RSET 1 NC VDD 7 + DC Fan 1 VDD 7 NC Heater 5 TSET NC 8 5TSET NC 8 TC624 TC622 3 N-Channel 6 NC OUT 6NC OUT Level Logic MOSFET N-Channel 4 GND OUT 2 Logic Level 4GND OUT 2 MOSFET e mperatur TSET erature TSET Te mp TSET – 2 C Te TSET – 2 C OUT OUT Fan "On" Heater "On" FIGURE 4-2: TC624 As A Fan Controller for Notebook PC FIGURE 4-3: TC622 As A Heater Thermostat © 2006 Microchip Technology Inc. DS21440C-page 7

TC622/TC624 5.0 PACKAGING INFORMATION 5.1 Package Marking Information Package marking data not available at this time. 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 713 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 Plastic DIP Pin 1 .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) DS21440C-page 8 © 2006 Microchip Technology Inc.

TC622/TC624 5.4 Package Dimensions (Continued) 8-Pin SOIC Pin 1 .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) 5-Pin TO-220 .185 (4.70) .165 (4.19) .415 (10.54) .117 (2.97) .390 (9.91) .055 (1.40) .103 (2.62) .156 (3.96) .045 (1.14) .140 (3.56) Dia. .293 (7.44) .204 (5.18) 3° - 7.5° .613 (15.57) 5 PLCS. .569 (14.45) .037 (0.95) .590 (14.99) .025 (0.64) .482 (12.24) .025 (0.64) .012 (0.30) Pin 1 .072 (1.83) .062 (1.57) .115 (2.92) .273 (6.93) .087 (2.21) .263 (6.68) Dimensions: inches (mm) © 2006 Microchip Technology Inc. DS21440C-page 9

TC622/TC624 NOTES: DS21440C-page 10 © 2006 Microchip Technology Inc.

TC622/TC624 SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. Your local Microchip sales office 2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 3. The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. © 2006 Microchip Technology Inc. DS21440C-page 11

TC622/TC624 NOTES: DS21440C-page 12 © 2006 Microchip Technology Inc.

Note the following details of the code protection feature on Microchip devices: (cid:129) Microchip products meet the specification contained in their particular Microchip Data Sheet. (cid:129) Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. (cid:129) There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. (cid:129) Microchip is willing to work with the customer who is concerned about the integrity of their code. (cid:129) Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, Accuron, and may be superseded by updates. It is your responsibility to dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART, ensure that your application meets with your specifications. PROMATE, PowerSmart, rfPIC, and SmartShunt are MICROCHIP MAKES NO REPRESENTATIONS OR WAR- registered trademarks of Microchip Technology Incorporated RANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, in the U.S.A. and other countries. WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB, LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, SEEVAL, SmartSensor and The Embedded Control Solutions MERCHANTABILITY OR FITNESS FOR PURPOSE. Company are registered trademarks of Microchip Technology Microchip disclaims all liability arising from this information and Incorporated in the U.S.A. its use. Use of Microchip’s products as critical components in Analog-for-the-Digital Age, Application Maestro, dsPICDEM, life support systems is not authorized except with express dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, written approval by Microchip. No licenses are conveyed, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial implicitly or otherwise, under any Microchip intellectual property Programming, ICSP, ICEPIC, Linear Active Thermistor, rights. MPASM, MPLIB, MPLINK, MPSIM, PICkit, PICDEM, PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo, PowerMate, PowerTool, Real ICE, rfLAB, rfPICDEM, Select Mode, Smart Serial, SmartTel, Total Endurance, UNI/O, WiperLock and Zena are trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. SQTP is a service mark of Microchip Technology Incorporated in the U.S.A. All other trademarks mentioned herein are property of their respective companies. © 2006, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved. Printed on recycled paper. Microchip received ISO/TS-16949:2002 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona and Mountain View, California in October 2003. The Company’s quality system processes and procedures are for its PICmicro® 8-bit MCUs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and analog products. In addition, Microchip’s quality system for the design and manufacture of development systems is ISO 9001:2000 certified. © 2006 Microchip Technology Inc. DS21440C-page 13

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Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: M icrochip: TC622COA TC622VAT TC622VOA TC622EAT TC622EPA TC624CPA TC622VPA