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PCA9501PW from PHILIPS

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PCA9501PW

Manufacturer: PHILIPS, PHI, NXP

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

Partnumber Manufacturer Quantity Availability
PCA9501PW PHILIPS, PHI, NXP 2187 In Stock

Description and Introduction

8-bit I2C-bus and SMBus I/O port with interrupt, 2-kbit EEPROM and 6 address pins The **PCA9501PW** from Philips is a versatile electronic component designed to facilitate level shifting between different voltage domains in digital circuits. As a bidirectional I²C-bus and SMBus voltage-level translator, it ensures seamless communication between devices operating at distinct logic levels, typically between 1.2V and 5.5V.  

This device is particularly useful in mixed-voltage systems, where compatibility between low-voltage microcontrollers and higher-voltage peripherals is essential. The PCA9501PW features automatic direction sensing, eliminating the need for additional control signals and simplifying system design. Its robust architecture supports hot insertion, making it suitable for applications requiring dynamic connectivity.  

Key specifications include low standby current consumption, high noise immunity, and compatibility with standard I²C-bus protocols. The component is housed in a TSSOP-8 package, offering a compact footprint for space-constrained designs.  

Common applications include embedded systems, industrial automation, and consumer electronics where reliable voltage translation is critical. By ensuring signal integrity across varying voltage levels, the PCA9501PW enhances system flexibility while maintaining performance.  

Engineers value this component for its reliability, ease of integration, and adherence to industry standards, making it a practical choice for modern digital interfaces.

Application Scenarios & Design Considerations

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

Alternative Part Number

  • PCF8574T --: I2C 8-bit I/O expander with interrupt output, functionally similar to the PCA9501 and widely available; NXP is the successor to Philips' semiconductor division.
  • PCF8574APW --: I2C 8-bit I/O expander in TSSOP package, same form factor and bus interface as the PCA9501PW, making it a practical drop-in for many designs.
  • MAX7311AUG+ --: 16-bit I2C I/O expander with interrupt, offering more I/O than the PCA9501 and suitable when extra ports are needed; different vendor and series for clear distinction.
  • PCF8574T --: I2C 8-bit I/O expander with interrupt output, functionally similar to the PCA9501 I/O expander portion and widely available in SOIC/TSSOP packages.
  • PCF8574APW --: I2C 8-bit I/O expander in TSSOP package, pin-compatible with the PCA9501PW footprint and suitable for similar GPIO expansion applications.
  • TCA9535PWR --: 16-bit I2C I/O expander with interrupt, offers more I/O than the PCA9501 and can replace it in designs needing additional GPIO with a different vendor source.
  • TCA9501PW --: Pin-compatible I2C I/O expander from a different NXP series with similar 8-bit GPIO and EEPROM functionality, making it a strong drop-in candidate.
  • PCF8574APW --: Widely available I2C 8-bit I/O expander in the same TSSOP package; lacks the integrated EEPROM but is a common functional substitute for simple GPIO expansion.
  • MCP23008T-E/SS --: I2C 8-bit I/O expander with configurable addressing and interrupt output, offering comparable GPIO expansion capability from an alternative vendor.

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