LM94CIMT/NOPB

Obsolete

Texas Instruments

IC HARDWARE MONITOR 56-TSSOP

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LM94CIMT/NOPB

Obsolete

Texas Instruments

IC HARDWARE MONITOR 56-TSSOP

Find alt

Alpha

Description Specifications Series Pricing CAD Documents

Description

General part information

LM94 Series

The LM94 hardware monitor has a two wire digital interface compatible with SMBus 2.0. Using a ΣΔ ADC, the LM94 measures the temperature of four remote diode connected transistors as well as its own die and 16 power supply voltages. The LM94 has new TruTherm technology that supports precision thermal diode measurements of processors on sub-micron processes.

To set fan speed, the LM94 has two PWM outputs that are each controlled by up to six temperature zones. The fan-control algorithm can be based on a lookup table, PI (proportional/integral) control loop, or a combination of both. The LM94 includes digital filters that can be invoked to smooth temperature readings for better control of fan speed such that acoustical noise is minimized. The LM94 has four tachometer inputs to measure fan speed. Limit and status registers for all measured values are included.

The LM94 builds upon the functionality of previous motherboard server management ASICs, such as the LM93. It also adds measurement and control support for dynamic Vccp monitoring for VRD10/11 and PROCHOT. It is designed to monitor a dual processor Xeon class motherboard with a minimum of external components.

Technical Specifications

Parameters and characteristics for this part

Specification	LM94CIMT/NOPB

Accuracy (Local) (Max)	2.5 °C
Accuracy (Max)	2.5 °C
Function	Hardware Monitor
Mounting Type	Surface Mount
Operating Temperature (Max)	85 °C
Operating Temperature (Min)	0 °C
Output Alarm	No
Output Fan	Yes
Output Type	I2C, SMBus, 2-Wire Serial
Package Length	0.24 in
Package Name	56-TSSOP, 56-TFSOP
Package Width	6.1 mm
Sensing Temperature (Max)	125 °C
Sensing Temperature (Min)	0 °C
Sensor Type	External, Internal
Topology	Register Bank, Fan Control, Comparator, Multiplexer, ADC (Sigma Delta)
Voltage - Supply (Maximum)	3.6 V
Voltage - Supply (Minimum)	3 V

LM94 Series

±2°C quad remote and socal temperature sensor with beta comp, fan ctrl, hw & supply mtr in a TSSOP

Part	Accuracy (Max)	Accuracy (Local) (Max)	Output Alarm	Output Fan	Sensor Type	Sensing Temperature (Max)	Function	Voltage - Supply (Maximum)	Voltage - Supply (Minimum)	Mounting Type	Package Length	Package Name	Package Width	Operating Temperature (Max)	Output Type	Topology
Texas Instruments LM94CIMTX/NOPB	2.5 °C	2.5 °C	No	Yes	External Internal	125 °C	Hardware Monitor	3.6 V	3 V	Surface Mount	0.24 in	56-TFSOP 56-TSSOP	6.1 mm	85 °C	2-Wire Serial I2C SMBus	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank
Texas Instruments LM94CIMT/NOPB	2.5 °C	2.5 °C	No	Yes	External Internal	125 °C	Hardware Monitor	3.6 V	3 V	Surface Mount	0.24 in	56-TFSOP 56-TSSOP	6.1 mm	85 °C	2-Wire Serial I2C SMBus	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank
Texas Instruments LM94CIMT	2.5 °C	2.5 °C	No	Yes	External Internal	125 °C	Hardware Monitor	3.6 V	3 V	Surface Mount	0.24 in	56-TFSOP 56-TSSOP	6.1 mm	85 °C	2-Wire Serial I2C SMBus	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank
Texas Instruments LM94CIMTX	2.5 °C	2.5 °C	No	Yes	External Internal	125 °C	Hardware Monitor	3.6 V	3 V	Surface Mount	0.24 in	56-TFSOP 56-TSSOP	6.1 mm	85 °C	2-Wire Serial I2C SMBus	ADC (Sigma Delta) Comparator Fan Control Multiplexer Register Bank

Pricing

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CAD

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Documents

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