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PCA9555BS from PHILIPS

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PCA9555BS

Manufacturer: PHILIPS

16-bit I2C and SMBus I/O port with interrupt

Partnumber Manufacturer Quantity Availability
PCA9555BS PHILIPS 16476 In Stock

Description and Introduction

16-bit I2C and SMBus I/O port with interrupt The **PCA9555BS** from Philips is a versatile **16-bit I/O expander** designed to enhance the input/output capabilities of microcontrollers and embedded systems. Utilizing the **I²C-bus/SMBus interface**, this component provides a simple and efficient way to add extra GPIO pins, reducing the need for complex circuitry.  

Featuring **16 quasi-bidirectional I/O ports**, the PCA9555BS can be individually configured as inputs or outputs, making it suitable for a variety of applications, including industrial control, consumer electronics, and automation. Each port includes **internal pull-up resistors**, eliminating the need for external components in many designs.  

The device supports **interrupt functionality**, allowing the host microcontroller to be notified of input state changes, improving system responsiveness. With an **operating voltage range of 2.3V to 5.5V**, it is compatible with both 3.3V and 5V logic levels. Additionally, its **low standby current consumption** makes it ideal for power-sensitive applications.  

The PCA9555BS is available in a **compact SSOP-24 package**, ensuring space-efficient integration into PCB designs. Its robust performance and ease of use make it a reliable choice for expanding I/O capabilities in embedded systems while maintaining design simplicity.

Application Scenarios & Design Considerations

16-bit I2C and SMBus I/O port with interrupt

Alternative Part Number

  • TCA9555PW --: Pin-compatible 16-bit I2C I/O expander with interrupt output, direct functional replacement for the PCA9555 in most designs.
  • PCF8575TS --: 16-bit I2C I/O expander from the same original vendor family, widely used as a drop-in substitute with similar register behavior.
  • MAX7311AUG --: 16-bit I2C port expander with interrupt and similar voltage range, suitable alternative when PCA9555 availability is limited.

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