TC620/TC621
Functional Block Diagrams
V
DD
8
4
Temp. to
Voltage
Converter
TC620
+
–
7
LOW LIMIT
2
V
REF
GEN
LOW SET
V
REF
+
–
6
5
HIGH LIMIT
CONTROL*
3
V
GEN
REF
HIGH SET
R
Q
S
Q
V
DD
8
Thermistor
Interface
Circuit
1
THERMISTOR
4
7
TC621
+
HIGH LIMIT
2
V
REF
GEN
HIGH SET
–
V
REF
+
–
6
5
LOW LIMIT
CONTROL*
3
V
REF
GEN
LOW SET
R
Q
S
Q
*Suffix code "C" denotes cooling option (High true CONTROL output).
Suffix code "H" denotes heating option (Low true CONTROL output).
DS21439B-page 2
2002 Microchip Technology Inc.