LM87
www.ti.com SNAS034J – APRIL 2000 – REVISED MARCH 2013 LM87 Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing
Check for Samples: LM87 FEATURES DESCRIPTION Remote diode temperature sensing (2
channels) 8 positive voltage inputs with scaling resistors
for monitoring +5 V, +12 V, +3.3 V, +2.5 V,
Vccp power supplies directly 2 inputs selectable for fan speed or voltage
monitoring 8-bit DAC output for controlling fan speed Chassis Intrusion Detector input WATCHDOG comparison of all monitored
values SMBusв„ў or I2C Serial Bus interface
compatibility VID0-VID4 or IRQ0-IRQ4 monitoring inputs On chip temperature sensor The LM87 is a highly integrated data acquisition
system for hardware monitoring of servers, Personal
Computers, or virtually any microprocessor-based
system. In a PC, the LM87 can be used to monitor
power supply voltages, motherboard and processor
temperatures, and fan speeds. Actual values for
these inputs can be read at any time. Programmable
WATCHDOG limits in the LM87 activate a fully
programmable and maskable interrupt system with
two outputs (INT# and THERM#). 1 234 APPLICATIONS System Thermal and Hardware Monitoring for
Servers, Workstations and PCs
Networking and Telecom Equipment
Office Electronics
Electronic Test Equipment and
Instrumentation KEY SPECIFICATIONS The LM87 has an on-chip digital output temperature …
