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PCAL6408A - 8-bit I2C-bus/SMBus I/O expander

General Description

The PCAL6408A is an 8-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the I2C-bus interface.

Key Features

  • I2C-bus to parallel port expander.
  • 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 Port P.
  • 2.5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P.
  • 3.3 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P.
  • 5 V SCL/SDA and 1.8 V, 2.5 V, 3.3 V or 5 V Port P.
  • Low standby current consumption of 1 A.
  • Schmitt-trigger action allows slow.

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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.

View original datasheet text
PCAL6408A Low-voltage translating, 8-bit I2C-bus/SMBus I/O expander with interrupt output, reset, and configuration registers Rev. 3.2 — 19 April 2017 Product data sheet 1. General description The PCAL6408A is an 8-bit general-purpose I/O expander that provides remote I/O expansion for most microcontroller families via the I2C-bus interface. NXP I/O expanders provide a simple solution when additional I/Os are needed while keeping interconnections to a minimum, for example, in battery-powered mobile applications for interfacing to sensors, push buttons, keypad, etc. In addition to providing a flexible set of GPIOs, it simplifies interconnection of a processor running at one voltage level to I/O devices operating at a different (usually higher) voltage level.