LM87CIMTX

• Remote Diode Temperature Sensing (2 Channels)
• 8 Scaling resistance monitoring of +5 V, +12 V, +3.3 V, +2.5 V positive voltage input, VCCP power supply direct
• 2 Input optional fan speed and voltage monitoring
• The 8-bit DAC output controls the fan speed
• Chassis security monitor input
• Watchdog comparison of all monitored values
• SMBus or me 2 C serial bus interface compatibility
• VID0 VID4 or IRQ0 - Monitor input for IRQ4
• In-chip temperature sensor

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The LM87 is a highly integrated data acquisition system for hardware servers, PCs, or virtually any microprocessor-based system monitoring. In a PC, the LM87 can be used to monitor the supply voltage, motherboard and processor temperature, and fan speed. The actual value of these investments can be read at any time. The LM87 Programmable Watchdog limits activation of a fully programmable and shielded interrupt output (INT# as well as THERM#) system.

The LM87 has an on-chip 8-bit resolution digital output temperature sensor as well as 2 external diode temperature monitoring capabilities with 8-bit resolution, an 8-channel analog input ADC with 8-bit resolution and an 8-bit DAC. The channel measures for the ADC LM87, nominally 3.3 V The input of the two ADCs can be redirected to a counter that can measure speeds up to the supply voltage of 2 fans. The slow speed, ΣΔADC architecture allows for stable signal measurements in a very noisy environment. The DAC uses an output voltage range of 0 to 2.5 V and can be used for fan speed control. Provide chassis intrusion detection circuit, and VID monitoring investment more investment. can also be used as an IRQ input if VID monitoring is not required. The LM87 has a serial bus interface that is compatible with SMBus and me 2 comet ™ 。

Key specifications:

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• Thermal and hardware monitoring systems servers, workstations and PCs
• Network and telecommunications equipment
• Office electronics
• Electronic test equipment and instrumentation