Datasheet4U Logo Datasheet4U.com

PCA8574A - Remote 8-bit I/O expander

Download the PCA8574A datasheet PDF. This datasheet also covers the PCA8574 variant, as both devices belong to the same remote 8-bit i/o expander family and are provided as variant models within a single manufacturer datasheet.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (PCA8574-NXP.pdf) that lists specifications for multiple related part numbers.

General Description

The PCA8574/74A provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)).

The devices consist of eight quasi-bidirectional ports, 400 kHz I2C-bus interface, three hardware address inputs and interrupt output operating between 2.3 V and 5.5 V.

The quasi-bidirectional port can be independently assigned as an input to monitor interrupt status or keypads, or as an output to activate indicator devices such as LEDs.

Overview

PCA8574; PCA8574A Remote 8-bit I/O expander for I2C-bus with interrupt Rev.

3 — 3 June 2013 Product data sheet 1.

Key Features

  • I2C-bus to parallel port expander.
  • 400 kHz I2C-bus interface (Fast-mode I2C-bus).
  • Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to VDD with 100 A current source.
  • 8-bit remote I/O pins that default to inputs at power-up.
  • Latched outputs with 25 mA sink capability for directly driving LEDs.
  • Total package sink capability of 200 mA.
  • Active LOW open-drain interrupt output.
  • Eight programmable slave addresses using three address pins.

More Datasheets from NXP Semiconductors

Part Number Description
PCA8574 Remote 8-bit I/O expander
PCA8575 Remote 16-bit I/O expander
PCA8576C Automotive LCD Driver
PCA8576D Automotive 40 x 4 LCD segment driver
PCA85132 LCD driver
PCA85133 Automotive LCD driver
PCA8514 Stand-alone OSD
PCA8515 Stand-alone OSD
PCA8516 Stand-alone OSD
PCA85162 32 x 4 automotive LCD driver