LM96080CIMT-NOPB1 NSC [National Semiconductor], LM96080CIMT-NOPB1 Datasheet

LM96080CIMT-NOPB1

Manufacturer Part Number

LM96080CIMT-NOPB1

Description

System Hardware Monitor with 2-Wire Serial Interface

Manufacturer

NSC [National Semiconductor]

Datasheet

1.LM96080CIMT-NOPB1.pdf (30 pages)

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System Hardware Monitor with 2-Wire Serial Interface

General Description

LM96080, compatible to LM80, is a hardware monitor that

contains a 10-bit delta-sigma ADC capable of measuring 7

positive voltages and local temperature. The LM96080 also

measures the speed of two fans and includes other hardware

monitoring on an I

quencer that performs WATCHDOG window comparisons of

all measured values and its interrupt outputs become active

when any values exceed the programmed limits.

The LM96080 is especially suited to interface to both linear

and digital temperature sensors. The 2.5 mV LSb (least sig-

nificant bit) and 2.56 volt input range is ideal for accepting

inputs from a linear sensor such as the LM94022. The BTI is

used as an input from either digital or thermostat sensors such

as LM73, LM75, LM56, LM57, LM26, LM27, LM26LV, or other

LM96080.

The LM96080 supports Standard Mode (Sm, 100 kbits/s) and

Fast Mode (Fm, 400 kbits/s) I

LM96080 includes an analog filter on the I

lines that allows improved noise immunity and supports

TIMEOUT reset function on SDA and SCL that prevents I

bus lockup. Three I

on a single bus.

The LM96080's 3.0V to 5.5V supply voltage range, low supply

current, and I

applications. Operation is guaranteed over the temperature

range of (−40)°C

in a 24-pin TSSOP package.

Applications

■

C® is a registered trademark of the Philips Corporation.

Communications Infrastructure

System Thermal and Hardware Monitoring for Servers

Electronic Test Equipment and Instrumentation

Office Electronics

C interface make it ideal for a wide range of

≤

C® interface. The LM96080 includes a se-

C device address pins allow up to 8 parts

≤

+125°C. The LM96080 is available

C interface modes of operation.

300701

C digital control

LM96080

Features

■

Key Specifications

■

Local Temperature Sensing

7 Positive Voltage Inputs with 10-bit Resolution

2 Programmable Fan Speed Monitoring Inputs

2.5 mV LSb and 2.56V Input Range

Chassis Intrusion Detector Input

WATCHDOG Comparison of All Monitored Values

Separate Input to Show Status in Interrupt Status Register

of Additional External Temperature Sensors Such as the

LM26/27, LM56/57, LM73, or LM75

Mode, 100 kbits/s, and Fast Mode, 400 kbits/s

Shutdown Mode to Minimize Power Consumption

Programmable RST_OUT/OS Pin: RST_OUT Provides a

Reset Output; OS Provides an Interrupt Output Activated

by an Overtemperature Shutdown Event

Software and Pin Compatible with the LM80

Total Unadjusted Error

Differential Non-Linearity

Supply Voltage Range

Supply Current (Operating)

Supply Current (Shutdown)

ADC Resolution

Temperature Resolution

Temperature Accuracy

C Serial Bus Interface Compatibility, Supports Standard

November 3, 2009

+3.0V to +5.5V

±1% FS (max)

www.national.com

0.370 mA typ

0.330 mA typ

0.5/0.0625°C

±1LSb (max)

± 3°C (max)

10 Bits

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