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MIC284

Features: • Optimized for CPU Thermal Supervision in Computing Applications• Measures Local and Remote Temperature• Sigma-Delta ADC for 8-Bit Temperature Results• 2-Wire SMBus-compatible Interface• Programmable Thermostat Settings for both Internal and External Zones&...

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SeekIC No. : 004420851 Detail

MIC284: Features: • Optimized for CPU Thermal Supervision in Computing Applications• Measures Local and Remote Temperature• Sigma-Delta ADC for 8-Bit Temperature Results• 2-Wire SMBu...

MIC284 Data Sheet

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Part Number:
MIC284
Supply Ability:
5000

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Product Details

Description



Features:

• Optimized for CPU Thermal Supervision in Computing Applications
• Measures Local and Remote Temperature
• Sigma-Delta ADC for 8-Bit Temperature Results
• 2-Wire SMBus-compatible Interface
• Programmable Thermostat Settings for both Internal and External Zones
• Open-Drain Interrupt Output Pin
• Open-Drain Over Temperature Output Pin for Fan Control or Hardware Shutdown
• Interrupt Mask and Status Bits
• Low Power Shutdown Mode
• Failsafe response to diode faults
• 2.7V to 5.5V Power Supply Range
• 8-Lead SOIC and MSOP Packages




Application

• Desktop, Server and Notebook Computers
• Power Supplies
• Test and Measurement Equipment
• Wireless Systems
• Networking/Datacom Hardware




Pinout

Connection Diagram




Specifications

Power Supply Voltage, VDD ................................................... 6.0V
Voltage on Any Pin................................0.3V to VDD+0.3V
Current Into Any Pin ................................................ ±10 mA
Power Dissipation, TA = +125°C ...............................30mW
Junction Temperature ............................................. +150°C
Storage Temperature ............................... 65°C to +150°C
ESD Ratings (Note 3)
Human Body Model...................................................... TBD V
Machine Model ............................................................ TBD V
Soldering
Vapor Phase (60 sec.) ............................ +220°C +5⁄0°C
Infrared (15 sec.) .................................... +235°C +5⁄0°C
Operating Ratings (Note 2)
Power Supply Voltage, VDD ........................... +2.7V to +5.5V
Ambient Temperature Range (TA) ............. -55°C to +125°C
Package Thermal Resistance (JA)
SOP........................................................................+152°C/W
MSOP......................................................................+206°C/W




Description

The MIC284 is a versatile digital thermal supervisor capable of measuring temperature using its own internal sensor and an inexpensive external sensor or embedded silicon diode such as those found in the Intel Pentium III* CPU. A 2-wire serial interface is provided to allow communication with either I2C** or SMBus* masters. MIC284 features include an open-drain over-temperature output with dedicated registers for implementing fan control or over-temperature shutdown circuits.

Interrupt status and mask bits of MIC284 are provided for reduced software overhead. The open-drain interrupt output pin can be used as either an overtemperature alarm or a thermostatic control signal. A programmable address pin permits two devices to share the bus. (Alternate base addresses available-contact Micrel.) Superior performance, low power and small size makes the MIC284 an excellent choice for the most demanding thermal management applications.

*SMBus and Pentium III are trademarks of Intel Corporation.

**I2C is a trademark of Philips Electronics, N.V.






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