PCA9675BQ,118

I/o Expanders Overview

The PCA9675BQ,118 is a remote 16-bit I/O expander for the Fast-mode Plus (Fm+) I2C-bus. It operates with supply voltages ranging from 1.8 V to 5.5 V and supports I2C clock frequencies up to 1 MHz. The device features push-pull outputs and includes an interrupt flag output to notify the microcontroller of input state changes. It is housed in a 24-pin DHVQFN package measuring 5.5 x 3.5 mm.

I/o Expanders Feature Summary

• Supports Fast-mode Plus I2C-bus speeds up to 1 MHz
• Provides 16 bidirectional I/O ports with push-pull outputs
• Includes interrupt flag output for efficient input monitoring
• Compatible with 1.8 V to 5.5 V power supply ranges

I/o Expanders Applications

• Remote I/O expansion in embedded systems
• Industrial control interfaces requiring high-speed communication
• Consumer electronics with space-constrained designs
• Automotive infotainment and instrument clusters

I/o Expanders Procurement Notes

Verify the exact part number suffix against official NXP documentation to ensure correct package type and tape/reel specifications. Confirm that the component meets required operating temperature ranges and voltage levels for your specific application environment before procurement.

I/o Expanders Selection Notes

Select this component when high-speed I2C communication is required alongside extensive I/O expansion in compact form factors. Consider the 24-pin DHVQFN package for surface-mount applications where board space is limited. Ensure compatibility with system voltage levels and I2C bus timing requirements.

I/o Expanders Part Context

This device belongs to the PCA967x family of I2C-bus I/O expanders designed by NXP Semiconductors. It serves as a drop-in upgrade for older PCF8575 devices, offering improved performance through support for faster Fm+ I2C-bus speeds while maintaining similar functionality and pinout compatibility.

I/o Expanders Replacement Considerations

The PCA9675PW is a pin-compatible alternative in TSSOP-24 packaging. Verify package dimensions and thermal characteristics when substituting. Check if the replacement variant meets the same voltage and speed requirements for your design.