Datasheet4U Logo Datasheet4U.com

PCA9557 - Remote 8-Bit I2C and SMBus Low-Power I/O Expander

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.

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

Key Features

  • 1 Low Standby Current Consumption of 1 μA Max.
  • I2C to Parallel Port Expander.
  • Operating Power-Supply Voltage Range of 2.3 V to 5.5 V.
  • 5-V Tolerant I/O Ports.
  • 400-kHz Fast I2C Bus.
  • Three Hardware Address Pins Allow for Use of up to Eight Devices on I2C/SMBus.
  • Lower-Voltage Higher-Performance Migration Path for PCA9556.
  • Input/Output Configuration Register.
  • Polarity Inversion Register.
  • Active-Low Reset Input.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
PCA9557 8-bit I2C and SMBus I/0 port with reset NXP
PCA9550 2-bit I2C LED driver NXP
PCA9551 8-bit I2C LED driver NXP
PCA9552 16-bit I2C LED driver NXP
PCA9553 4-bit I2C LED driver NXP

Other Datasheets by Texas Instruments

Part Number Description
PCA9554 Remote 8-Bit I2C AND SMBus I/O Expander
PCA9554A Remote 8-Bit I2C and SMBus I/O Expander
PCA9555 Remote 16-bit I2C and SMBus I/O Expander
PCA9515A Dual Bidirectional I2C Bus and SMBus Repeater
PCA9515B Dual Bidirectional I2C Bus and SMBus Repeater

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
Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9557 SCPS133J – DECEMBER 2005 – REVISED JUNE 2014 PCA9557 Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Reset and Configuration Registers 1 Features •1 Low Standby Current Consumption of 1 μA Max • I2C to Parallel Port Expander • Operating Power-Supply Voltage Range of 2.3 V to 5.