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The LM85, hardware monitor, has a two wire digital interface compatible with SMBus 2.0. Using an 8-bit Σ∆ ADC, the LM85 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 LM85 has three PWM outputs that are each cont.
n 2-wire, SMBus 2.0 compliant, 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 20035301 © 2003 National Semiconductor Corporation DS200353 www.national.com LM85 Connection Diagram 24 Pin QSOP 20035302 NS Package MQA24 Top View LM85BIMQ or LM85CIMQ (55 units per rail), or LM85BIMQX or LM85CIM.
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| 8 | LM8050J |
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