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TC621

TelCom Semiconductor
Part Number TC621
Manufacturer TelCom Semiconductor
Description (TC620 / TC621) DUAL TRIP POINT TEMPERATURE SENSORS
Published Nov 21, 2005
Detailed Description 1 TC620 TC621 5V, DUAL TRIP POINT TEMPERATURE SENSORS FEATURES s s s s User-Programmable Hysteresis and Temperature Set ...
Datasheet PDF File TC621 PDF File

TC621
TC621

Overview
1 TC620 TC621 5V, DUAL TRIP POINT TEMPERATURE SENSORS FEATURES s s s s User-Programmable Hysteresis and Temperature Set Point Easily Programs with 2 External Resistors Wide Temperature Detection Range .
– 40°C to +125°C (TC620/621CVx) External Thermistor for Remote Sensing Applications (TC621x) GENERAL DESCRIPTION The TC620 and TC621 are programmable logic output temperature detectors designed for use in thermal management applications.
The TC620 features an on-board temperature sensor, while the TC621 connects to an external NTC thermistor for remote sensing applications.
Both devices feature dual thermal interrupt outputs (HIGH LIMIT and LOW LIMIT), each of which program with a single external resistor.
On the TC620, these outputs are driven active (high) when measured temperature equals the user-programmed limits.
The CONTROL (hysteresis) output is driven high when temperature equals the high limit setting, and returns low when temperature falls below the low limit setting.
This output can be used to provide simple ON/OFF control to a cooling fan or heater.
The TC621 provides the same output functions except that the logical states are inverted.
The TC620/621 are usable over a maximum temperature range of – 40°C to +125°C.
Ambient Temperature – 40°C to +85°C – 40°C to +85°C 2 3 4 5 6 7 APPLICATIONS s s s s Power Supply Overtemperature Detection Consumer Equipment Temperature Regulators CPU Thermal Protection ORDERING INFORMATION Part No.
TC620x*COA TC620x*CPA TC620x*EOA TC620x*EPA TC620CVOA TC621x*COA TC621x*CPA Package Ambient Temperature 8-Pin SOIC 0°C to +70°C 8-Pin Plastic DIP 0°C to +70°C 8-Pin SOIC – 40°C to +85°C 8-Pin Plastic DIP – 40°C to +85°C 8-Pin SOIC – 40°C to +125°C 8-Pin SOIC 0°C to +70°C 8-Pin Plastic DIP 0°C to +70°C Part No.
TC621x*EOA TC621x*EPA Package 8-Pin SOIC 8-Pin Plastic DIP *The part code will be C or H (see Functional Block Diagram, below, and page 2).
FUNCTIONAL BLOCK DIAGRAM VDD 8 Temp to Voltage Converter 1 ...


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