SM6611 series

NIPPON PRECISION CIRCUITS—2

BLOCK DIAGRAM

PIN DESCRIPTION

Output inverting

temperature detect

Output

buffer

OUT

VDD

Comparator

Reference

temperature sensor

VSS

TEST1

Hysteresis control

TEST2

TEST3

Number

Name

I/O

Description

1

VDD

–

Supply voltage

2T1–

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.

3

OUT

O

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.

4

T3

–

Test pin 3. This pin is used for test purposes by NPC. Connect to VSS for normal operation.

5

VSS

–

Ground

6

T2

–

Test pin 3. This pin is used for test purposes by NPC. Connect to VSS for normal operation.