Product Model

PCA9555PW+118

Introduction

16-bit I/O Expander with I2C-bus Interface

Brand and Manufacturer

NXP Semiconductors

Features

16-bit input/output port expander

I2C-bus interface

Polarity inversion register

Active LOW interrupt output

Power-up with all I/Os configured as inputs

8 I2C addresses selectable

Total 16 bits are configurable

Product Performance

Low standby current consumption

Noise filter on SCL/SDA inputs

Latched outputs with high current drive capability for directly driving LEDs

Internal power-on reset

8 individual I/O configurations possible

Open-drain interrupt output

Technical Specifications

Operating voltage range: 2.3V to 5.5V

400 kHz I2C-bus interface (Fast-mode)

24 mA sink capability for 5V tolerant I/Os

Latch-up testing is done to JESD78 which exceeds 100 mA

ESD protection exceeds JESD 22

Dimensions, Shape, and Packaging

TSSOP-24 package

Body Dimensions: 7.8 mm Length x 4.4 mm Width x 0.9 mm Height (approximate)

Clear, plastic, tube packaging

Quality and Reliability

High-reliability under varying environmental conditions

Ensured by NXP's quality control and testing protocols

Product Advantages

Ability to expand GPIOs for microcontrollers with limited pins

Enhanced system-level I/O flexibility

Easy interfacing with most microcontrollers

Product Competitiveness

High-integration reducing the need for additional components

Robust design enabling use in multiple environments

Compatibility

Compatible with I2C-bus specification and user-system

5V tolerant I/Os ensuring compatibility with multiple devices

Standard Certification and Compliance

Compliant with the following standards: RoHS, I2C-bus specification

Lifespan and Sustainability

Designed for long operational life under typical usage conditions

Actual Application Fields

Industrial controls

Home automation systems

Server motherboards

Alarm systems

Personal electronics

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