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PCA9554A Datasheet Remote 8-Bit I2C and SMBus I/O Expander

Manufacturer: Texas Instruments

General Description

This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation.

It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].

The PCA9554A consists of one 8-bit Configuration (input or output selection), Input, Output, and Polarity Inversion (active high or active low) registers.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9554A SCPS127E – SEPTEMBER 2006 – REVISED JUNE 2014 PCA9554A Remote 8-Bit I2C and SMBus I/O Expander With Interrupt Output and.

Key Features

  • 1 I2C to Parallel Port Expander.
  • Open-Drain Active-Low Interrupt Output.
  • Operating Power-Supply Voltage Range of 2.3 V to 5.5 V.
  • 5-V Tolerant I/Os.
  • 400-kHz Fast I2C Bus.
  • Three Hardware Address Pins Allow up to Eight Devices on the I2C/SMBus.
  • Input/Output Configuration Register.
  • Polarity Inversion Register.
  • Internal Power-On Reset.
  • Power-Up With All Channels Configured as Inputs.
  • No Glitch on Power.