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TCA6408 - LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER

General Description

This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL) and serial data (SDA)].

Key Features

  • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V.
  • Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between.
  • 1.8-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port.
  • 2.5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port.
  • 3.3-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port.
  • 5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port.
  • I2C to Parallel Port Expander.
  • Low Standby Current Consumption of 1 µA.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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www.ti.com TCA6408 LOW-VOLTAGE 8-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS SCPS151C – FEBRUARY 2007 – REVISED JUNE 2007 FEATURES • Operating Power-Supply Voltage Range of 1.65 V to 5.5 V • Allows Bidirectional Voltage-Level Translation and GPIO Expansion Between – 1.8-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port – 2.5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port – 3.3-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port – 5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port • I2C to Parallel Port Expander • Low Standby Current Consumption of 1 µA • Schmitt-Trigger Action Allows Slow Input Transition and Better Switching Noise Immunity at the SCL and SDA Inputs – Vhys = 0.18 V Typ at 1.8 V – Vhys = 0.25 V Typ at 2.5 V – Vhys = 0.