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1FEATURES

2? 2-wire, SMBus 2.0 Compliant, Serial Digital

Interface

? 8-bit ΣΔ ADC

? Monitors VCCP, 2.5V, 3.3 VSBY, 5.0V, and 12V

Motherboard/processor Supplies

? Monitors 2 Remote Thermal Diodes

? Programmable Autonomous Fan Control

Based on Temperature Readings

? Noise Filtering of Temperature Reading for

Fan Control

? 1.0°C Digital Temperature Sensor Resolution

? 3 PWM Fan Speed Control Outputs

? Provides High and Low PWM Frequency

Ranges

? 4 Fan Tachometer Inputs

? Monitors 5 VID Control Lines

? 24-pin TSSOP Package

? XOR-tree Test Mode

APPLICATIONS

? Desktop PC

? Microprocessor based equipment

– (e.g. Base-stations, Routers, ATMs, Point of

Sales)

KEY SPECIFICATIONS

? Voltage Measurement Accuracy ±2% FS (max)

? Resolution 8-bits, 1°C

? Temperature Sensor Accuracy ±3°C (max)

? Temperature Range

– LM96000 Operational 0°C to +85°C

– Remote Temp Accuracy 0°C to +125°C

? Power Supply Voltage +3.0V to +3.6V

? Power Supply Current 0.53 mA

DESCRIPTION

The LM96000, hardware monitor, has a two wire

digital interface compatible with SMBus 2.0. Using an

8-bit ΣΔ ADC, the LM96000 measures:

? the temperature of two remote diode connected

transistors as well as its own die

? the VCCP, 2.5V, 3.3VSBY, 5.0V, and 12V

supplies (internal scaling resistors).

To set fan speed, the LM96000 has three PWM

outputs that are each controlled by one of three

temperature zones. High and low PWM frequency

ranges are supported. The LM96000 includes a

digital filter that can be invoked to smooth

temperature readings for better control of fan speed.

The LM96000 has four tachometer inputs to measure

fan speed. Limit and status registers for all measured

values are included.