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  Increase I2C or SMBus Data Rate and Reduce Power Consumption with Low Power Bus Accelerator &mdash LT Journal
  PDF, 220 Kb, 档案已发布: Mar 19, 2008
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  L DESIGN FEATURES Increase I2C or SMBus Data Rate and
  Reduce Power Consumption with
  by Sam Tran
  Low Power Bus Accelerator
  Introduction
  I2C and SMBus 2-wire buses use
  simple open-drain pull-down drivers
  with resistive or current source pullups. Communications protocols in
  these systems allow multiple devices
  to drive and monitor the bus without
  bus contention, creating a robust
  communications link. Unfortunately,
  as systems trend towards higher com‑
  plexity and lower supply voltages, the
  advantages gained by the simplicity
  of the open-drain pull‑down protocol
  are offset by the disadvantages of
  increased rise times and greater DC
  bus power consumption.
  As designs require higher reliability
  and a greater number of features, the
  number of peripherals attached to the
  I2C or SMBus system increases. Some …

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• Interface > I2C and SMBus Bus Buffers and Accelerators