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TC622
TC624
LOW COST, SINGLE TRIP POINT TEMPERATURE SENSOR
FEATURES
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s
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Temperature Set Point Easily Programs with a
Single External Resistor
Operates with 2.7V Power Supply (TC624)
TO-220 Package for Direct Mounting to Heatsink
(TC622xAT) or Standard 8-Pin PDIP and SOIC
Cost Effective
The TC622 has a power supply voltage range of 4.5V 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
many portable applications.
Eight-pin through-hole and surface mount packages are
available. The TC622 is also offered in a 5-pin TO-220
package.
FUNCTIONAL BLOCK DIAGRAM
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3
4
APPLICATIONS
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Power Supply Over-temperature Detection
Consumer Electronics
Fire/ Heat Detection
UPS's, Amplifiers, Motors
CPU Thermal Management in PC's
TEMP
SENSOR
GENERAL DESCRIPTION
The TC622 and TC624 are programmable solid state
temperature switches designed to replace mechanical
switches in sensing and control applications. Both devices
integrate the temperature sensor along with a voltage refer-
ence and all required detector circuitry to form a stand-alone
temperature switch. The desired temperature set point is
set by the user with a single external resistor.
Ambient temperature is sensed and compared to the
programmed setpoint. The OUT and OUT outputs are
driven to their active state when the measured temperature
exceeds the programmed setpoint.
TEMPERATURE
TO VOLTAGE
CONVERTER
OUT
OUT
VOLTAGE
REFERENCE
GENERATOR
T
SET
5
GND
V
DD
ORDERING INFORMATION
Part No.
TC622COA
TC622CPA
TC622EAT
TC622EOA
TC622EPA
TC622VAT
TC622VOA
TC622VPA
TC624COA
TC624CPA
TC624EOA
TC624EPA
TC624VOA
TC624VPA
Voltage Operation
4.5V
4.5V
4.5V
4.5V
4.5V
4.5V
4.5V
4.5V
2.7V
2.7V
2.7V
2.7V
2.7V
2.7V
to 18V
to 18V
to 18V
to 18V
to 18V
to 18V
to 18V
to 18V
to 4.5V
to 4.5V
to 4.5V
to 4.5V
to 4.5V
to 4.5V
Package
8-Pin SOIC
8-Pin Plastic DIP
5-Pin TO-220
8-Pin SOIC
8-Pin Plastic DIP
5-Pin TO-220
8-Pin SOIC
8-Pin Plastic DIP
8-Pin SOIC
8-Pin Plastic DIP
8-Pin SOIC
8-Pin Plastic DIP
8-Pin SOIC
8-Pin Plastic DIP
Ambient Temperature
0°C to +70°C
0°C to +70°C
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +125°C
– 40°C to +125°C
– 40°C to +125°C
0°C to +70°C
0°C to +70°C
– 40°C to +85°C
– 40°C to +85°C
– 40°C to +125°C
– 40°C to +125°C
TC622/24-4
9/25/96
6
7
8
2-21
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
