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PCA9557PWR from NXP,NXP Semiconductors

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PCA9557PWR

Manufacturer: NXP

Remote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration Registers 16-TSSOP -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9557PWR NXP 16 In Stock

Description and Introduction

Remote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration Registers 16-TSSOP -40 to 85 The **PCA9557PWR** from NXP Semiconductors is a versatile **I²C-bus controlled 8-bit I/O expander** designed to simplify digital interfacing in embedded systems. This low-power CMOS device provides **eight general-purpose input/output (GPIO) pins**, which can be individually configured as inputs or outputs via the I²C interface.  

Featuring an operating voltage range of **2.3V to 5.5V**, the PCA9557PWR is well-suited for a variety of applications, including industrial control, consumer electronics, and IoT devices. Its **interrupt output** pin allows efficient monitoring of input state changes, reducing the need for continuous polling by the host microcontroller.  

The device supports **standard (100 kHz) and fast (400 kHz) I²C communication speeds**, ensuring compatibility with a broad range of microcontrollers. Additionally, its **low standby current consumption** makes it ideal for power-sensitive designs.  

Packaged in a **TSSOP-16** form factor, the PCA9557PWR offers a compact footprint for space-constrained applications. With built-in **internal pull-up resistors** and robust ESD protection, it enhances system reliability while minimizing external component requirements.  

Engineers value the PCA9557PWR for its ease of integration, flexible I/O configuration, and reliable performance, making it a practical choice for expanding digital I/O capabilities in modern electronic designs.

Application Scenarios & Design Considerations

Remote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration Registers 16-TSSOP -40 to 85

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