LOW COST, SINGLE TRIP POINT
TEMPERATURE SENSOR
1
2
3
4
5
6
7
8
TC622
TC624
Hysteresis
TEMPERATURE
To prevent output "chattering" at the trip point tempera-
ture, the temperature detector in the TC622/624 has 2°C of
hysteresis (See Figure 1).
SET POINT
(SET POINT - 2 DEGREE C)
The outputs are driven active when the temperature
crosses the setpoint determined by the external resistor. As
temperature declines below the setpoint, the hysteresis
action will hold the outputs true until the temperature drops
2°C below the threshold.
OUT
OUT
Figure 1. TC622/624 Hysteresis
PIN CONFIGURATIONS
8-Pin DIP
5-Pin TO-220
8-Pin SOIC
NC
NC
1
8
7
6
5
8
1
2
3
4
NC
NC
VDD
NC
2
3
4
OUT
OUT
GND
VDD
7
6
5
TC622COA
TC622EOA
TC622VOA
OUT
OUT
TC622CPA
TC622EPA
TC622VPA
NC
TSET
TC622EAT
TC622VAT
TSET
GND
8-Pin DIP
8-Pin SOIC
1 2 3 4 5
NC
1
2
3
4
8
7
6
5
NC
8
NC
1
2
3
4
NC
VDD
NC
VDD
OUT
OUT
GND
TC624COA
TC624EOA
TC624VOA
7
6
5
OUT
OUT
GND
NC
TC624CPA
TC624EPA
TC624VPA
TSET
TSET
NOTE: For TO-220 Package, Pin 3 is
connected to case heatsink.
TELCOM SEMICONDUCTOR, INC.
2-23
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
