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LM87CIMTWUN/a12avaiSerial Interface System Hardware Monitor with Remote Diode Temperature Sensing
LM87CIMT/NOPB |LM87CIMTNOPBNSN/a14avaiSerial Interface System Hardware Monitor with Remote Diode Temperature Sensing 24-TSSOP -40 to 125
LM87CIMTX/NOPB |LM87CIMTXNOPBNSC ?N/a290avaiSerial Interface System Hardware Monitor with Remote Diode Temperature Sensing 24-TSSOP -40 to 125
LM87CIMTX/NOPB |LM87CIMTXNOPBNSCN/a141avaiSerial Interface System Hardware Monitor with Remote Diode Temperature Sensing 24-TSSOP -40 to 125


LM87CIMTX/NOPB ,Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing 24-TSSOP -40 to 125Electrical Characteristics. The ensured specifications apply only for the test conditions listed. S ..
LM87CIMTX/NOPB ,Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing 24-TSSOP -40 to 125FEATURES DESCRIPTIONThe LM87 is a highly integrated data acquisition234• Remote diode temperature s ..
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LPC1788FBD208 ,512kB flash, 96kB SRAM, Ethernet, USB, LCD, LQFP208 packageapplications requiring a high level of integration and low power dissipation.The Cortex-M3 is a nex ..
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LPC2101FBD48 ,Single-chip 16-bit/32-bit microcontrollers; 8 kB/16 kB/32 kB flash with ISP/IAP, fast ports and 10-bit ADC
LPC2101FBD48 ,Single-chip 16-bit/32-bit microcontrollers; 8 kB/16 kB/32 kB flash with ISP/IAP, fast ports and 10-bit ADC


LM87CIMT-LM87CIMT/NOPB-LM87CIMTX/NOPB
Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing 24-TSSOP -40 to 125
LM87
www.ti.com
SNAS034J –APRIL 2000–REVISED MARCH 2013
LM87 Serial Interface System Hardware Monitor with Remote Diode Temperature Sensing
Checkfor Samples: LM87
1FEATURES DESCRIPTION

The LM87isa highly integrated data acquisition
234• Remote diode temperature sensing(2
system for hardware monitoringof servers, Personalchannels) Computers, or virtually any microprocessor-based• 8 positive voltage inputs with scaling resistors system.Ina PC, the LM87 can be usedto monitorfor monitoring+5V, +12V, +3.3V, +2.5V, power supply voltages, motherboard and processor
Vccp power supplies directly
temperatures, and fan speeds. Actual values for
these inputs can be readat any time. Programmable• 2 inputs selectable for fan speedor voltage WATCHDOG limits in the LM87 activatea fullymonitoring programmable and maskable interrupt system with• 8-bit DAC output for controlling fan speed two outputs (INT# and THERM#). Chassis Intrusion Detector input The LM87 has an on-chip digital output temperature• WATCHDOG comparisonofall monitored sensor with 8-bit resolutionas wellas the capabilityofvalues monitoring2 external diode temperatures to 8-bit
resolution, an8 channel analog input ADC with 8-bit• SMBus™orI2C Serial Bus interface
resolution and an 8-bit DAC.A channel on the ADCcompatibility measures the supply voltage appliedto the LM87,• VID0-VID4or IRQ0-IRQ4 monitoring inputs nominally 3.3 V. Two of the ADC inputs can be• On chip temperature sensor redirectedtoa counter that can measure the speedofto2 fans.A slow speed ΣΔ ADC architectureAPPLICATIONS allows stable measurementof signalsin an extremely
noisy environment. The DAC, witha0to 2.5V output• System Thermal and Hardware Monitoring for voltage range, can be used for fan speed control.Servers, Workstations and PCs Additional inputs are provided for Chassis Intrusion• Networking and Telecom Equipment detection circuits, and VID monitor inputs. The VID
monitor inputs can also be usedas IRQ inputsif VID• Office Electronics
monitoringis not required. The LM87 hasa Serial• Electronic Test Equipment and Bus interface thatis compatible with SMBus™ andInstrumentation I2 C™.
KEY SPECIFICATIONS Connection Diagram Voltage Monitoring Error±2% (max) Error±4°C (max) Error±
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