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MIC74 - 2-Wire Serial I/O Expander and Fan Controller Advance Information

Datasheet Summary

Description

The MIC74 is a fully programmable serial-to-parallel I/O expander compatible with the SMBus™ (system management bus) protocol.

It acts as a “slave” on the bus, providing eight independent I/O lines.

Each I/O bit can be individually programmed as an input or output.

Features

  • Provides eight bits of general purpose I/O.
  • Built in fan speed control logic (optional).
  • 2-wire SMBus™/I2C™ compatible serial interface plus interrupt output.
  • 2.7V to 3.6V operating voltage range.
  • 5V-tolerant I/O.
  • Low quiescent current: 2µA (typical).
  • Bit-programmable I/O options: input or output push-pull or open-drain output interrupt on input changes.
  • Outputs can directly drive LEDs (10mA IOL).
  • Up to 8 devices p.

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Datasheet preview – MIC74

Datasheet Details

Part number MIC74
Manufacturer Micrel Semiconductor
File Size 142.57 KB
Description 2-Wire Serial I/O Expander and Fan Controller Advance Information
Datasheet download datasheet MIC74 Datasheet
Additional preview pages of the MIC74 datasheet.

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Full PDF Text Transcription

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MIC74 Micrel MIC74 2-Wire Serial I/O Expander and Fan Controller Advance Information General Description The MIC74 is a fully programmable serial-to-parallel I/O expander compatible with the SMBus™ (system management bus) protocol. It acts as a “slave” on the bus, providing eight independent I/O lines. Each I/O bit can be individually programmed as an input or output. If programmed as an output, each I/O bit can be programmed as an open-drain or complementary push-pull output. If desired, the four most significant I/O bits can be programmed to implement fan speed control. An internal clock generator and state machine eliminate the overhead generally associated with “bit-banging” fan speed control.
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