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PCA9555DWRG4 from TI,Texas Instruments

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PCA9555DWRG4

Manufacturer: TI

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-SOIC -40 to 85

Partnumber Manufacturer Quantity Availability
PCA9555DWRG4 TI 2530 In Stock

Description and Introduction

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-SOIC -40 to 85 The **PCA9555DWRG4** from Texas Instruments is a versatile 16-bit I²C-bus and SMBus I/O expander designed to enhance system flexibility in a wide range of applications. This integrated circuit (IC) provides bidirectional I/O expansion for microcontrollers with limited GPIO pins, enabling efficient control of multiple peripherals through a simple two-wire interface.  

Featuring low standby current consumption, the PCA9555DWRG4 is ideal for power-sensitive designs. Its 16 I/O pins can be individually configured as inputs or outputs, supporting both push-pull and open-drain operations. The device includes interrupt functionality, reducing the need for continuous polling and improving system efficiency.  

With an operating voltage range of **2.3V to 5.5V**, the PCA9555DWRG4 is compatible with various logic levels, making it suitable for mixed-voltage environments. Its robust ESD protection ensures reliable performance in industrial, automotive, and consumer electronics applications.  

Housed in a **TSSOP-24** package, this IC offers a compact footprint for space-constrained designs. Whether used in LED control, sensor interfacing, or system monitoring, the PCA9555DWRG4 provides a scalable and cost-effective solution for expanding digital I/O capabilities.  

Engineers appreciate its ease of integration, low power consumption, and reliable performance, making it a preferred choice for modern embedded systems.

Application Scenarios & Design Considerations

Remote 16-Bit I2C And SMBus I/O Expander With Interrupt Output And Configuration Registers 24-SOIC -40 to 85

Alternative Part Number

  • TCA9555PWR --: Pin-compatible I2C 16-bit I/O expander from TI with the same function and package family, often used as a direct substitute for PCA9555.
  • PCF8575TS --: Widely available I2C 16-bit I/O expander with similar functionality and register behavior, a common cross-reference for PCA9555 designs.
  • MAX7311AUG+ --: 16-bit I2C I/O port expander with comparable features and interrupt output, suitable as an alternative when TI/NXP parts are unavailable.

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