
TC620/TC621
Functional Block Diagrams
Temp. to
Voltage
Converter
2
LOW SET
3
HIGH SET
VREF
GEN
VREF
VREF
GEN
TC620
+
–
VDD
8
4
7
LOW LIMIT
+
6
HIGH LIMIT
–
RS
QQ
5
CONTROL*
1
THERMISTOR
Thermistor
Interface
Circuit
2
HIGH SET
LOW SET 3
VREF
GEN
VREF
VREF
GEN
TC621
+
–
VDD
8
4
7
HIGH LIMIT
+
6
LOW LIMIT
–
RS
QQ
5
CONTROL*
*Suffix code "C" denotes cooling option (High true CONTROL output).
Suffix code "H" denotes heating option (Low true CONTROL output).
DS20001439E-page 2
2001-2015 Microchip Technology Inc.