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PCA9555PW- from NXP,NXP Semiconductors

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PCA9555PW-

Manufacturer: NXP

16-bit I2C-bus and SMBus I/O port with interrupt

Partnumber Manufacturer Quantity Availability
PCA9555PW-,PCA9555PW NXP 1 In Stock

Description and Introduction

16-bit I2C-bus and SMBus I/O port with interrupt The **PCA9555PW** from **NXP Semiconductors** is a versatile **16-bit I/O expander** designed to enhance system flexibility by providing additional GPIO (General-Purpose Input/Output) ports via an **I²C-bus interface**. This CMOS-based component is ideal for applications requiring expanded I/O capabilities while minimizing microcontroller pin usage.  

Featuring **16 programmable I/O pins**, the PCA9555PW allows each pin to be individually configured as an input or output. It includes internal pull-up resistors, simplifying circuit design and reducing external component count. The device supports **interrupt functionality**, enabling efficient event-driven processing by alerting the host controller when input states change.  

With an **operating voltage range of 2.3V to 5.5V**, the PCA9555PW is compatible with a wide variety of logic levels, making it suitable for mixed-voltage systems. Its low standby current consumption ensures energy efficiency in power-sensitive applications.  

Common use cases include **industrial control systems, consumer electronics, and embedded designs** where additional I/O expansion is needed without increasing board complexity. The PCA9555PW is available in a **TSSOP-24 package**, offering a compact footprint for space-constrained designs.  

Engineers value its **robust performance, ease of integration, and reliable I²C communication**, making it a preferred choice for expanding digital interfaces in modern electronic systems.

Application Scenarios & Design Considerations

16-bit I2C-bus and SMBus I/O port with interrupt

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