LM96000
LM96000 is Hardware Monitor manufactured by National Semiconductor.
Description
The LM96000, hardware monitor, has a two wire digital interface patible with SMBus 2.0. Using an 8-bit Σ∆ 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. n n n n n n n n 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
Key Specifications
Voltage Measurement Accuracy Resolution Temperature Sensor Accuracy Temperature Range
- LM96000 Operational
- Remote Temp Accuracy n Power Supply Voltage n Power Supply Current n n n n
± 2% FS (max)
8-bits, 1˚C
± 3˚C (max)
0˚C to +85˚C 0˚C to +125˚C +3.0V to +3.6V 0.53 m A
Features n 2-wire, SMBus 2.0 pliant, serial digital interface n 8-bit Σ∆ ADC n Monitors VCCP, 2.5V, 3.3 VSBY, 5.0V, and 12V motherboard/processor supplies n Monitors 2 remote thermal diodes n Programmable autonomous fan control based on temperature readings
Applications n Desktop PC n Microprocessor based equipment (e.g. Base-stations, Routers, ATMs, Point of Sales)
Block Diagram
© 2004 National Semiconductor Corporation
DS200846
.national.
Connection Diagram
24 Pin TSSOP
NS Package MTC24E Top View LM96000CIMT (61 units per rail), or LM96000CIMTX (2500 units per tape and reel)
Pin Descriptions
Symbol SMBus SMBDAT SMBCLK VID0 Processor VID Lines VID1 VID2...
