SM6611 series
BLOCK DIAGRAM
VDD
TEST1
TEST2
TEST3
Output inverting
temperature detect
Output
buffer
Comparator
OUT
Reference
temperature sensor
Hysteresis control
VSS
PIN DESCRIPTION
Number
Name
I/O
Description
1
VDD
–
Supply voltage
Test pin 1. This pin is used for test purposes by NPC. It has a built-in pull-up resistor. Leave
open for normal operation.
2
3
T1
–
Output.
SM6611×AH: Open-drain output. A pull-up resistor of 100kΩ should be connected to this
pin. Goes LOW when the switch preset temperature is exceeded.
SM6611×BH: CMOS output. Goes LOW to HIGH when the switch preset temperature is
exceeded.
OUT
O
4
5
6
T3
VSS
T2
–
–
–
Test pin 3. This pin is used for test purposes by NPC. Connect to VSS for normal operation.
Ground
Test pin 3. This pin is used for test purposes by NPC. Connect to VSS for normal operation.
NIPPON PRECISION CIRCUITS—2
NPC [ NIPPON PRECISION CIRCUITS INC ]
