CAT9554A Datasheet PDF - ON Semiconductor 8-bit I2C and SMBus I/O Port Specs

CAT9554A - 8-bit I2C and SMBus I/O Port

This page provides the datasheet information for the CAT9554A, a member of the CAT9554 8-bit I2C and SMBus I/O Port family.

Datasheet Summary

Description

The CAT9554 and CAT9554A are CMOS devices that provide 8

bit parallel input/output port expansion for I2C and SMBus compatible applications.

These I/O expanders provide a simple solution in applications where additional I/Os are needed: sensors, power switches, LEDs, pushbuttons, and fans.

Features

an active low interrupt output which indicates to the system master that an input state has changed. The device’s extended addressing capability allows up to 8 devices to share the same bus. The CAT9554A is identical to the CAT9554 except the fixed part of the I2C slave address is different. This allows up to 16 of devices (eight CAT9554 and eight CAT9554A) to be connected on the same bus. Features.
400 kHz I2C Bus Compatible (Note 1).
2.3 V to 5.5 V Operation.
Low Sta.

Datasheet Details

Part number	CAT9554A
Manufacturer	ON Semiconductor
File Size	151.87 KB
Description	8-bit I2C and SMBus I/O Port
Datasheet	CAT9554A Datasheet
Additional preview pages of the CAT9554A datasheet.

📁 Similar Datasheet

CAT9554A - 8-Bit I2C and SMBus I/O Port (Catalyst Semiconductor)

CAT9554 - 8-Bit I2C and SMBus I/O Port (Catalyst Semiconductor)

CAT9555 - 16-Bit I2C and SMBus I/O Port (Catalyst Semiconductor)

CAT93C46 - 1K/2K/2K/4K/16K-Bit Microwire Serial E2PROM (Catalyst Semiconductor)

CAT93C4611 - Supervisory Circuits with Microwire Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer (Catalyst Semiconductor)

CAT93C4612 - Supervisory Circuits with Microwire Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer (Catalyst Semiconductor)

CAT93C4613 - Supervisory Circuits with Microwire Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer (Catalyst Semiconductor)

CAT93C4614 - Supervisory Circuits with Microwire Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer (Catalyst Semiconductor)

CAT93C4621 - Supervisory Circuits with Microwire Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer (Catalyst Semiconductor)

CAT93C4622 - Supervisory Circuits with Microwire Serial CMOS E2PROM/ Precision Reset Controller and Watchdog Timer (Catalyst Semiconductor)

Full PDF Text Transcription

Click to expand full text

CAT9554, CAT9554A 8-bit I2C and SMBus I/O Port with Interrupt Description The CAT9554 and CAT9554A are CMOS devices that provide 8−bit parallel input/output port expansion for I2C and SMBus compatible applications. These I/O expanders provide a simple solution in applications where additional I/Os are needed: sensors, power switches, LEDs, pushbuttons, and fans. The CAT9554/9554A consist of an input port register, an output port register, a configuration register, a polarity inversion register and an I2C/SMBus−compatible serial interface. Any of the eight I/Os can be configured as an input or output by writing to the configuration register. The system master can invert the CAT9554/9554A input data by writing to the active−high polarity inversion register.

Published: Mar 23, 2020 |