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PCA9557PW from TI,Texas Instruments

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PCA9557PW

Manufacturer: TI

8-bit I2C-bus and SMBus I/O port with reset

Partnumber Manufacturer Quantity Availability
PCA9557PW TI 352 In Stock

Description and Introduction

8-bit I2C-bus and SMBus I/O port with reset The **PCA9557PW** from Texas Instruments is a versatile **I²C-bus controlled 8-bit I/O expander** designed to enhance system flexibility by providing additional GPIO (General-Purpose Input/Output) ports. This component is particularly useful in applications where microcontroller I/O pins are limited, enabling efficient expansion without significant hardware changes.  

Featuring **low standby current consumption**, the PCA9557PW is optimized for power-sensitive designs. It supports both input and output configurations, with programmable polarity inversion for input ports, simplifying interfacing with various logic levels. The device operates across a **wide voltage range (2.3V to 5.5V)**, making it compatible with multiple logic families.  

Communication is facilitated via the **I²C-bus interface**, allowing seamless integration with microcontrollers and other I²C-compatible peripherals. The PCA9557PW includes internal pull-up resistors, reducing the need for external components. Its **interrupt output** feature enhances system responsiveness by signaling input state changes.  

Packaged in a **TSSOP-16** form factor, the PCA9557PW is suitable for space-constrained applications, including industrial controls, consumer electronics, and embedded systems. With robust ESD protection and reliable performance, it serves as a dependable solution for expanding I/O capabilities in modern electronic designs.

Application Scenarios & Design Considerations

8-bit I2C-bus and SMBus I/O port with reset

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