IC Phoenix logo

Home ›  P  › P12 > PCA8550

PCA8550 from TEXAS

Fast Delivery, Competitive Price @IC-phoenix

If you need more electronic components or better pricing, we welcome any inquiry.

PCA8550

Manufacturer: TEXAS, TI, PHI, PHILIPS

4-bit multiplexed/1-bit latched 5-bit I2C EEPROM

Partnumber Manufacturer Quantity Availability
PCA8550 TEXAS, TI, PHI, PHILIPS 6184 In Stock

Description and Introduction

4-bit multiplexed/1-bit latched 5-bit I2C EEPROM The **PCA8550** from Philips is a versatile **I²C-controlled 8-bit I/O expander** designed to enhance microcontroller-based systems by providing additional input/output ports. It is particularly useful in applications where the host microcontroller has limited GPIO pins, enabling efficient expansion without complex circuitry.  

Featuring an **I²C-bus interface**, the PCA8550 supports standard (100 kHz) and fast (400 kHz) communication modes, ensuring compatibility with a wide range of microcontrollers. The device includes **8 configurable I/O pins**, each of which can be independently set as an input or output. Internal pull-up resistors simplify interfacing with external components, reducing the need for additional passive components.  

A key advantage of the PCA8550 is its **low standby current consumption**, making it suitable for power-sensitive applications. The device also incorporates an **interrupt output pin**, which alerts the host microcontroller when an input state changes, minimizing the need for continuous polling and improving system efficiency.  

With a **wide operating voltage range (2.3V to 5.5V)**, the PCA8550 is adaptable to various logic levels, supporting integration into both 3.3V and 5V systems. Its compact package and straightforward I²C interface make it an ideal choice for space-constrained designs in industrial control, consumer electronics, and embedded systems.  

The PCA8550 combines simplicity, flexibility, and reliability, offering a cost-effective solution for I/O expansion in modern electronic designs.

Application Scenarios & Design Considerations

4-bit multiplexed/1-bit latched 5-bit I2C EEPROM

Alternative Part Number

  • PCA9555PW --: I2C I/O expander with similar function and pinout family, widely available and often used as a substitute for PCA8550 in I2C expander applications.
  • PCF8574T --: Classic I2C 8-bit I/O expander with compatible I2C interface, a common drop-in alternative for simple I2C port expansion.
  • PCA9535PW --: 16-bit I2C I/O expander from the same PCA953x family, offering similar I2C expander functionality with good availability.
  • PCF8574APWR --: I2C 8-bit I/O expander with similar address/control function, widely available and pin-compatible in many designs.
  • PCA9554APW --: 8-bit I2C I/O expander with interrupt output, functionally comparable and commonly used as a substitute.
  • TCA9555PWR --: 16-bit I2C I/O expander from TI with similar bus interface and control logic, suitable when more I/O is acceptable.
  • PCA9548A --: I2C multiplexer/switch with similar address selection function; widely available and pin-compatible in many designs.
  • TCA9548A --: Direct functional equivalent I2C switch with same register interface, often used as a drop-in for PCA8550-style address multiplexing.
  • PCA9546A --: 4-channel I2C switch from the same PCA954x family, suitable when fewer channels are needed and offering similar control logic.
  • PCF8574AP --: I2C 8-bit I/O expander with similar address/control functionality; NXP is the successor to Philips, so pinout and register behavior are closely compatible.

Request Quotation

For immediate assistance, call us at +86 533 2716050 or email [email protected]

Part Number Quantity Target Price($USD) Email Contact Person
We offer highly competitive channel pricing. Get in touch for details.

Specializes in hard-to-find components chips