LM87 datasheet(36/45 Pages) TI2

Part #	LM87

Description	LM87 Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing

PDF	45 Pages

Scroll/Zoom	100%

Manufacturer	TI2 [Texas Instruments]

Direct Link	https://www.ti.com

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36 / 45 page

LM87

SNAS034J – APRIL 2000 – REVISED MARCH 2013

www.ti.com

Note: Setting all ones to the high limits for voltages and fans (0111 1111 binary for temperature) means

interrupts will never be generated except the case when voltages go below the low limits.

For voltage input high limits, the device is doing a greater than comparison. For low limits, however, it is doing a

less than or equal to comparison.

Typical Application

In this PC application the LM87 monitors temperature, fan speed for 2 fans, and 6 power

supply voltages. It also monitors an optical chassis intrusion detector.

The LM87 provides a DAC output that can be used to control fan speed.

Figure 16.

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LM87 Datasheet(PDF) 36 Page - Texas Instruments