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PCA6408A Datasheet 8-bit I2C-bus and SMBus I/O expander

Manufacturer: NXP Semiconductors

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General Description

The PCA6408A 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.

Overview

PCA6408A Low-voltage, 8-bit I2C-bus and SMBus I/O expander with interrupt output, reset, and configuration registers Rev.

1 — 27 September 2012 Product data sheet 1.

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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