TC621 Microchip Technology Inc., TC621 Datasheet - Page 2

• Manufacturer Part Number: TC621
• Description: 5v, Dual Trip Point Temperature Sensors
• Manufacturer: Microchip Technology Inc.

TC620/TC621
Functional Block Diagrams
DS21439C-page 2
THERMISTOR
HIGH SET
HIGH SET
LOW SET
LOW SET
*Suffix code "C" denotes cooling option (High true CONTROL output).
Suffix code "H" denotes heating option (Low true CONTROL output).
1
2
3
2
3
Thermistor
Interface
Converter
Temp. to
Voltage
Circuit
V REF
V REF
V REF
GEN
GEN
V REF
V REF
V REF
GEN
GEN
+
–
+
–
+
–
+
–
TC621
TC620
Q
R
Q
R
S
Q
Q
S
8
4
7
6
5
8
4
7
6
5
V DD
V DD
HIGH LIMIT
© 2006 Microchip Technology Inc.
CONTROL*
LOW LIMIT
CONTROL*
HIGH LIMIT
LOW LIMIT