PCA9672D,512

I/o Expanders Overview

The PCA9672D,512 is an 8-bit remote I/O expander for the Fast-mode Plus (Fm+) I2C-bus. It features eight quasi-bidirectional ports with latched outputs capable of sinking 25 mA each and a total package sink capability of 200 mA. The device operates on a supply voltage between 2.3 V and 5.5 V, supporting up to 1 MHz bus speeds. It includes two hardware address pins allowing sixteen unique slave addresses per bus segment. Key functional blocks include an active LOW open-drain interrupt output (INT) for input state change notification, an active LOW hardware reset pin (RESET), and internal Power-On Reset (POR).

I/o Expanders Feature Summary

• Supports 1 MHz Fast-mode Plus I2C interface for high-speed communication without requiring bus buffers.
• Provides active LOW open-drain interrupt output to notify the microcontroller of input state changes.
• Features active LOW hardware reset input and internal Power-On Reset for reliable initialization.
• Offers latched outputs with 25 mA sink capability suitable for directly driving LEDs.

I/o Expanders Applications

• LED signs and displays
• Servers
• Industrial control systems
• Programmable Logic Controllers (PLCs)
• Medical equipment

I/o Expanders Procurement Notes

Verify the specific ordering suffix ',512' corresponds to the SO16 package in tube packing when sourcing components. Confirm that the manufacturer designation matches NXP Semiconductors specifications. Ensure compatibility with the required operating temperature range of -40 °C to +85 °C for your application environment before finalizing procurement decisions.

I/o Expanders Selection Notes

Select this component when an 8-bit I/O expansion solution with interrupt capabilities is required over standard PCF8574 devices. The PCA9672 offers higher drive current and faster bus speeds compared to legacy expanders. Consider the SO16 package availability if surface-mount space allows. Evaluate the need for hardware reset functionality versus software-only reset options present in other family members.

I/o Expanders Part Context

The PCA9672 belongs to NXP's PCA96xx series of remote I/O expanders designed for Fm+ I2C-bus applications. It serves as an enhanced alternative to the PCF8574, providing improved drive strength and interrupt functionality. The device integrates well into systems requiring efficient GPIO management with minimal master CPU overhead due to its event-driven interrupt architecture.

I/o Expanders Replacement Considerations

PCA9672D,518 is a direct replacement offering the same electrical characteristics but packaged in a reel instead of a tube. Other variants like PCA9672BS (HVQFN16) and PCA9672PW (TSSOP16) provide different package footprints while maintaining identical functionality. Verify pinout compatibility when switching between package types.