TC622EOA Microchip

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 switches in sensing and control applications. Both Operates with 2.7V Power Supply (TC624) devices integrate the temperature sensor with a 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 Power Supply Over-Temperature Detection programmed set point. The OUT and OUT outputs are Consumer Electronics driven to their active state when the measured Fire/ Heat Detection temperature exceeds the programmed set point. UPSs, Amplifiers, Motors The TC622 has a power supply voltage range of 4.5V 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 -40C to +125C (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 0C to +70C TC622CPA 4.5V to 18V 8-Pin PDIP 0C to +70C TC622EAT 4.5V to 18V 5-PinTO-220 -40C to +85C TC622EOA 4.5V to 18V 8-Pin SOIC -40C to +85C TC622EPA 4.5V to 18V 8-Pin PDIP -40C to +85C TC622VAT 4.5V to 18V 5-Pin TO-220 -40C to +125C TC622VOA 4.5V to 18V 8-Pin SOIC -40C to +125C TC622VPA 4.5V to 18V 8-Pin PDIP -40C to +125C TC624COA 2.7V to 4.5V 8-Pin SOIC 0C to +70C TC624CPA 2.7V to 4.5V 8-Pin PDIP 0C to +70C TC624EOA 2.7V to 4.5V 8-PinSOIC -40C to +85C TC624EPA 2.7V to 4.5V 8-Pin PDIP -40C to +85C TC624VOA 2.7V to 4.5V 8-Pin SOIC -40C to +125C TC624VPA 2.7V to 4.5V 8-PinPDIP -40C to +125 2002 Microchip Technology Inc. DS21440B-page 1TC622/TC624 Package Type SOIC SOT-220 PDIP NC NC 1 8 1 8 NC NC 2 V OUT TC622COA 7 DD V 2 DD 7 TC622EOA OUT TC622CPA OUT 3 6 NC TC622VOA TC622EPA TC622EAT NC 3 6 OUT T 4 GND 5 SET TC622VAT TC622VPA T 5 4 SET GND 12 3 4 5 NC 1 8 NC 8 NC 1 NC V TC624COA 2 7 DD OUT TC624EOA 2 7 V OUT DD TC624CPA 3 6 NC OUT TC624VOA TC624EPA 6 NC 3 4 T OUT 5 GND SET TC624VPA 5 T GND 4 SET Note: For TO-220 Package, Pin 3 is connected to case heatsink. Functional Block Diagram +9V 9V Battery R SET Horn 7 V 1 DD NC Microcontrollers 5 8 T NC SET TC622 TC624 3 OUT 6 NC 2 4 OUT GND ALARM DS21440B-page 2 2002 Microchip Technology Inc. OUT OUT V DD GND T SET