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LM32CIMTX Datasheet

  • LM32CIMTX

  • Dual Thermal Diode Temperature Sensor with SensorPath Bus

  • 24頁(yè)

  • NSC

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LM32 Dual Thermal Diode Temperature Sensor with SensorPath
鈩?/div>
Bus
May 2004
LM32
Dual Thermal Diode Temperature Sensor with
SensorPath
鈩?/div>
Bus
General Description
The LM32 is a digital temperature sensor that measures 3
temperature zones and has a single-wire interface compat-
ible with National Semiconductor鈥檚 SensorPath bus. Sensor-
Path data is pulse width encoded, thereby allowing the LM32
to be easily connected to many general purpose micro-
controllers. Several National Semiconductor Super I/O prod-
ucts include a fully integrated SensorPath master, that when
connected to an LM32 can realize a hardware monitor func-
tion that includes limit checking for measured values, au-
tonomous fan speed control and many other functions.
The LM32 measures the temperature of its own die as well
as two external devices such as a processor thermal diode
or a diode connected transistor. The LM32 can resolve tem-
peratures up to 255藲C and down to -256藲C. The operating
temperature range of the LM32 is 0藲C to +125藲C. The ad-
dress programming pin allows two LM32s to be placed on
one SensorPath bus.
n
n
n
n
n
2 remote diode temperature sensor zones
Internal local temperature zone
0.5 藲C resolution
Measures temperatures up to 140 藲C
14-lead TSSOP package
Key Specifications
n
Temperature Sensor Accuracy
n
Temperature Range:
鈥?LM32 junction
鈥?Remote Temp Accuracy
n
Power Supply Voltage
n
Average Power Supply Current
n
Conversion Time (all Channels)
鹵
3 藲C (max)
0 藲C to +85 藲C
0 藲C to +100 藲C
+3.0 V to +3.6 V
0.5 mA (typ)
22.5ms to 1456ms
Applications
n
Microprocessor based equipment
(Motherboards, Video Cards, Base-stations, Routers,
ATMs, Point of Sale, 鈥?
n
Power Supplies
Features
n
SensorPath Interface
鈥?2 hardware programmable addresses
Typical Application
20071101
SensorPath
鈩?/div>
is a trademark of National Semiconductor Corporation
漏 2004 National Semiconductor Corporation
DS200711
www.national.com

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