LM32

Features:

`SensorPath Interface
          - 2 hardware programmable addresses
`2 remote diode temperature sensor zones
`Internal local temperature zone
`0.5 resolution
`Measures temperatures up to 140
`14-lead TSSOP package

Application

`Microprocessor based equipment (Motherboards, Video Cards, Base-stations, Routers, ATMs, Point of Sale, .)
`Power Supplies


Pinout




Specifications

Supply Voltage (V⁺)                                     -0.5 V to 6.0 V
Voltage at Any Digital Input or
Output Pin                                                   -0.5 V to 6.0 V
Voltage on D1+ and D2+                 -0.5 V to (V+ + 0.05 V)
Current on D1- and D2-                                           ±1 mA
Input Current per Pin(Note 3)                                  ±5 mA
Package Input Current (Note 3)                             ±30 mA
Package Power Dissipation (Note 4)
Output Sink Current                                                   10 mA
ESD Susceptibility (Note 5)
Human Body Model                                                   2500 V
Machine Model                                                            250 V
Storage Temperature                                  -65 to +150 


Description

The LM32 is a digital temperature sensor that measures 3 temperature zones and has a single-wire interface compatible with National Semiconductor's SensorPath bus. Sensor- Path data is pulse width encoded, thereby allowing the LM32 to be easily connected to many general purpose microcontrollers.

Several National Semiconductor Super I/O products include a fully integrated SensorPath master, that when connected to an LM32 can realize a hardware monitor function that includes limit checking for measured values, autonomous 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 temperatures up to 255 and down to -256. The operating temperature range of the LM32 is 0 to +125. The address programming pin allows two LM32s to be placed on one SensorPath bus.