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PCA9538PWR from TI,Texas Instruments

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PCA9538PWR

Manufacturer: TI

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers 16-TSSOP -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9538PWR TI 1574 In Stock

Description and Introduction

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers 16-TSSOP -40 to 85 The **PCA9538PWR** from Texas Instruments is a versatile, low-voltage 8-bit I²C-bus and SMBus I/O expander designed to enhance system flexibility in microcontroller-based applications. This compact device provides general-purpose remote I/O expansion, enabling efficient control of multiple peripherals with minimal GPIO pin usage on the host controller.  

Featuring an **I²C interface**, the PCA9538PWR supports standard (100 kHz) and fast (400 kHz) communication modes, ensuring compatibility with a wide range of microcontrollers. Each of its eight I/O pins can be independently configured as an input or output, with internal pull-up resistors simplifying circuit design. The device also includes interrupt output functionality, allowing the host to monitor input changes without continuous polling.  

Operating at **1.65V to 5.5V**, the PCA9538PWR is suitable for both 3.3V and 5V systems, making it ideal for industrial, consumer, and embedded applications. Its small **TSSOP-16 package** ensures space-efficient integration into compact designs.  

Key features include **low standby current consumption**, **5V-tolerant I/O ports**, and **hardware address pins** for configuring multiple devices on the same bus. With robust performance and ease of use, the PCA9538PWR is a reliable solution for expanding digital I/O in modern electronic systems.

Application Scenarios & Design Considerations

Remote 8-Bit I2C and SMBus Low-Power I/O Expander With Interrupt Output, Reset, and Config Registers 16-TSSOP -40 to 85

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