Document
SM6611 series
NIPPON PRECISION CIRCUITS INC.
Miniature High-Precision Temperature Switch IC
OVERVIEW
The SM6611 series are temperature switch ICs that change state (invert) when the chip temperature exceeds a preset temperature. The switches are designed with temperature hysteresis to prevent unstable output when the temperature is in the vicinity of the preset temperature. There are 6 output switching temperatures in the series, available in 2 output configurations, making the SM6611 series devices ideal for a wide range of applications.
FEATURES
I I I I
pre lim ina
I I
2.4 to 12.0V operating supply voltage −20 to 100°C operating temperature range ±3°C temperature accuracy 45 to 95°C output switch temperatures in 10°C steps 10°C temperature hysteresis
I I
30µA (typ) low current consumption Output configuration • SM6611×AH open-drain active-LOW output • SM6611×BH CMOS active-HIGH output 6-pin SOT23-6W package
APPLICATIONS
I
Motherboard overheating protection
I
Battery-pack temperature protection
PINOUT
(Top view)
PACKAGE DIMENSIONS
(Unit: mm)
VDD T1
1 2 3
6 5 4
T2
2.8 ± 0.2
+ 0.2 1.8 − 0.1
VSS T3
OUT
0.95
0.95
1.1 ± 0.1
0.8 ± 0.1
0.1
+ 0.1 0.40 − 0.05
0.12
M
ORDERING INFORMATION
SM6611×AH series
Device Output switch temperature 45°C 55°C
SM6611×BH series
Device
Output configuration
Output switch temperature 45°C 55°C 65°C
0 to 0.1
Output configuration
SM6611AAH
SM6611ABH
SM6611BAH
SM6611BBH
SM6611CAH SM6611DAH SM6611EAH SM6611FAH
65°C
75°C
Open-drain activeLOW output
SM6611CBH
SM6611DBH SM6611EBH SM6611FBH
75°C 85°C 95°C
CMOS active-HIGH output
85°C 95°C
NIPPON PRECISION CIRCUITS—1
0.2 min.
ry
2.9 ± 0.2 1.9 ± 0.2
+ 0.1 0.125 − 0.05
SM6611 series
BLOCK DIAGRAM
VDD
TEST1
TEST2
TEST3
Output inverting temperature detect
Reference temperature sensor
VSS
PIN DESCRIPTION
Number 1 2 Name VDD T1 I/O –
3
4 5 6
pre
NIPPON PRECISION CIRCUITS—2
lim
Supply voltage – OUT O T3 – VSS T2 – Ground –
ina ry
Comparator Output buffer OUT Hysteresis control
Description 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. 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. Test pin 3. This pin is used for test purposes by NPC. Connect to VSS for normal operation. Test pin 3. This pin is used for test purposes by NPC. Connect to VSS for normal operation.
SM6611 series
SPECIFICATIONS
Absolute Maximum Ratings
VSS = 0V
Parameter Supply voltage range Power dissipation Storage temperature range Symbol VDD PD Rating −0.3 to 15 2.5 Unit V
Recommended Operating Conditions
VSS = 0V
Parameter Supply voltage range Operating temperature range
DC Characteristics
VDD = 2.4 to 12V, VSS = 0V, Ta = −20 to 100°C unless otherwise noted
Parameter Supply voltage Cu.