PCA9672PW,118

I/o Expanders Overview

The PCA9672PW,118 is an 8-bit remote I/O expander for the Fast-mode Plus (Fm+) I2C-bus, manufactured by NXP Semiconductors. It operates within a supply voltage range of 2.3 V to 5.5 V and supports a maximum clock frequency of 1 MHz. The device features eight quasi-bidirectional ports with a latched output sink capability of 25 mA per pin and a total package sink capability of 200 mA. It includes an active LOW open-drain interrupt output (INT) and an active LOW hardware reset input. The component utilizes two address pins (AD0, AD1) to support up to sixteen programmable slave addresses on a single bus. It is housed in a TSSOP16 plastic thin shrink small outline package.

I/o Expanders Feature Summary

• Supports high-speed 1 MHz I2C-bus communication via Fast-mode Plus interface
• Provides hardware interrupt output to notify microcontrollers of input state changes without polling
• Includes active LOW hardware reset pin and internal Power-On Reset functionality
• Features quasi-bidirectional I/O ports with strong current sink drive capability for direct LED driving

I/o Expanders Applications

• LED signs and displays
• Servers and industrial control systems
• Keypads and mobile devices
• Medical equipment and PLCs

I/o Expanders Procurement Notes

Verify the specific ordering suffix

I/o Expanders Selection Notes

Select this component when system design requires expanding GPIO resources via a standard I2C interface while maintaining high bus speeds up to 1 MHz. The inclusion of a dedicated interrupt line allows for efficient event-driven processing, reducing CPU overhead compared to continuous polling methods. Ensure the application voltage falls within the 2.3 V to 5.5 V range and that the load requirements do not exceed the 25 mA per pin or 200 mA total package limits.

I/o Expanders Part Context

The PCA9672 belongs to NXP's family of remote I/O expanders designed for Fm+ I2C-bus applications. It serves as a bridge between serial communication protocols and parallel port expansion, allowing microcontrollers to manage multiple peripheral devices using only two wires. This series is optimized for scenarios requiring reliable data transmission at higher frequencies than standard I2C modes support.

I/o Expanders Replacement Considerations

Direct functional substitutes include other NXP 8-bit I2C I/O expanders such as the PCF8574 or PCA8574 series, though these typically operate at lower bus speeds (100 kHz or 400 kHz) and lack the integrated interrupt and reset features found in the PCA9672.