PCA9673BS,118

I/o Expanders Overview

The PCA9673BS,118 is a remote 16-bit I/O expander for the Fast-mode Plus (Fm+) I2C-bus with interrupt and reset capabilities. It operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 1 MHz. The device features 16 quasi-bidirectional I/O pins with latched outputs capable of sinking 25 mA per pin and a total package sink capability of 400 mA. It includes an active LOW open-drain interrupt output, hardware reset input, and Power-On Reset (POR). The HVQFN24 package provides 16 programmable slave addresses using two address pins.

I/o Expanders Feature Summary

• Supports high-speed Fm+ I2C communication at 1 MHz
• Provides strong SDA sink capability for large bus capacitance
• Features direct LED driving with high current sink capacity
• Includes hardware reset and active LOW interrupt output

I/o Expanders Applications

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

I/o Expanders Procurement Notes

Verify component authenticity through authorized NXP distributors or certified suppliers. Confirm the specific HVQFN24 package variant matches design requirements. Check RoHS compliance status and ensure the part number suffix corresponds to the correct tape-and-reel packaging configuration for automated assembly processes.

I/o Expanders Selection Notes

Select this component when upgrading from PCF8575 designs requiring higher bus speeds and drive strength. Ensure the application utilizes the 1 MHz Fm+ interface capability. Verify that the 25 mA per-pin sink current meets load requirements without exceeding the 400 mA total package limit. Confirm compatibility with the microcontroller's I2C voltage levels.

I/o Expanders Part Context

This device belongs to the PCA9673 family of remote I/O expanders designed for Fast-mode Plus I2C buses. It serves as a drop-in upgrade for legacy PCF8575 components, offering improved performance metrics including faster clock speeds, higher drive currents, and additional address options while maintaining similar functional interfaces.

I/o Expanders Replacement Considerations

PCA9673D, PCA9673PW, PCA9673BQ are alternative package variants of the same core device. Direct replacement requires verifying package footprint compatibility and ensuring the new variant maintains the required thermal and electrical characteristics for the specific PCB layout.