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PCA9557DBR from TI,Texas Instruments

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PCA9557DBR

Manufacturer: TI

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

Partnumber Manufacturer Quantity Availability
PCA9557DBR TI 241 In Stock

Description and Introduction

Remote 8-Bit I2C and SMBus Low-Power I/O Expander with Reset and Configuration Registers 16-SSOP -40 to 85 The **PCA9557DBR** from Texas Instruments is a versatile **I/O expander** designed to enhance system flexibility by providing additional **general-purpose input/output (GPIO) ports** via an **I²C-bus interface**. This compact, low-power device is ideal for applications requiring extra I/O lines without increasing microcontroller pin count.  

Featuring **8-bit remote bidirectional I/O ports**, the PCA9557DBR can be configured individually as inputs or outputs. Each port includes **internal pull-up resistors**, simplifying circuit design while maintaining signal integrity. The device supports **interrupt functionality**, allowing the host controller to monitor input changes efficiently.  

Operating within a **2.3V to 5.5V supply range**, the PCA9557DBR is suitable for mixed-voltage systems. Its **low standby current consumption** makes it a practical choice for power-sensitive designs. Additionally, the I²C interface supports **standard (100 kHz) and fast (400 kHz) modes**, ensuring compatibility with a wide range of microcontrollers.  

Common applications include **industrial controls, consumer electronics, and embedded systems** where expanding I/O capabilities is essential. The PCA9557DBR is available in a **TSSOP-16 package**, offering a compact footprint for space-constrained designs.  

With its robust features and ease of integration, the PCA9557DBR provides a reliable solution for extending I/O functionality in modern electronic systems.

Application Scenarios & Design Considerations

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

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