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PCA9501 from PHILIPS

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PCA9501

Manufacturer: PHILIPS

8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins

Partnumber Manufacturer Quantity Availability
PCA9501 PHILIPS 201 In Stock

Description and Introduction

8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins The **PCA9501** from Philips is a versatile **level-translating I²C-bus repeater** designed to facilitate seamless communication between devices operating at different voltage levels. This component is particularly useful in mixed-voltage systems, where it ensures reliable data transfer without signal degradation.  

Featuring bidirectional voltage translation, the PCA9501 supports voltage ranges from **1.0V to 3.6V** on the low-voltage side and **2.7V to 5.5V** on the high-voltage side. Its built-in buffering capability enhances signal integrity over long bus lines, making it ideal for applications such as embedded systems, industrial controls, and consumer electronics.  

The PCA9501 incorporates **automatic direction sensing**, eliminating the need for additional control signals and simplifying system design. It also provides **hot-swap capability**, reducing the risk of data corruption during live insertion or removal. With a low standby current and robust ESD protection, this repeater ensures both efficiency and durability in demanding environments.  

Engineers will appreciate its compatibility with **Standard-mode and Fast-mode I²C-bus protocols**, ensuring broad interoperability. Whether bridging legacy and modern systems or extending bus reach, the PCA9501 delivers a reliable solution for voltage-level translation challenges.

Application Scenarios & Design Considerations

8-bit I2C and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins

Alternative Part Number

  • PCF8574AP --: Widely available I2C 8-bit I/O expander with interrupt output, functionally similar to the PCA9501 and often used as a drop-in replacement in I2C GPIO expansion designs.
  • TCA9554APWR --: I2C/SMBus 8-bit I/O expander with interrupt and configuration registers, pin-compatible with PCF8574 family and a strong second-source option for PCA9501 applications.
  • MCP23008-E/SO --: I2C 8-bit I/O expander with configurable registers and interrupt output, offering similar functionality and broad availability as an alternative to the PCA9501.

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