# TC626 Temperature Limit Switch

## Features
· Requires no external components
· On-chip temperature sensing
· Available in TO-220 and TO-92 packages
· 50mA output (TO-220), 10mA output (TO-92)
· Vibration-immune
· Factory-programmed temperature setting

## Applications
· Vibration-immune temperature sensing
· Fan speed control
· System overtemperature shutdown
· Thermal warning
· Consumer products

## General Description
· Temperature limit detector
· Operates from -55°C to +125°C
· Replaces mechanical temperature limit switches
· Increased ruggedness, reliability, and accuracy

## Ordering Information
· TC626xxxVAB: TO-220 package
· TC626xxxVZB: TO-92 package
· `xxx` represents the trip-point temperature in °C

## Electrical Characteristics
· Supply Voltage: 4.5V to 18V
· Supply Current: 300µA - 600µA
· Output Resistance: 75 Ω
· Output Current (TO-220): 25mA
· Output Current (TO-92): 10mA
· Absolute Accuracy: ±3°C
· Trip Point Hysteresis: 3.5°C - 6.5°C

## Pin Configurations
· TO-220 & TO-92: VDD, Ground, Output

## Operation
· Output is low when temperature is below the setpoint.
· Output goes high when temperature reaches the setpoint ±3°C.
· Hysteresis prevents output chattering; output remains high until temperature drops 5°C below the setpoint.

## Absolute Maximum Ratings
· Power Dissipation (TO-92): 440mW
· Power Dissipation (TO-220): 1.6mW
· Supply Voltage: 20V
· Operating Temperature: -55°C to +125°C
· Storage Temperature: -65°C to +150°C