PCA9670PW,112

I/o Expanders Overview

The PCA9670PW,112 is an 8-bit I/O expander for the I2C-bus (Fast-mode Plus) featuring a reset function. Manufactured by NXP Semiconductors, it operates within a supply voltage range of 2.3 V to 5.5 V and supports I/O voltages up to 5.5 V. The device provides 8 quasi-bidirectional ports with individual programmable open-drain outputs capable of sinking 25 mA each, totaling 200 mA for the package. It includes three hardware address pins allowing 64 unique addresses and features a low-active reset input. The component is housed in a TSSOP16 package.

I/o Expanders Feature Summary

• Supports Fast-mode Plus I2C bus speeds up to 1 MHz with enhanced 30 mA drive capability on the SDA line.

I/o Expanders Applications

• Remote I/O expansion for microcontroller systems
• Direct LED driving via high-current latch outputs
• Key scanning and interrupt status monitoring

I/o Expanders Procurement Notes

Verify the specific suffix '112' against official NXP documentation to confirm packaging details, as suffixes often denote tape-and-reel quantities or specific handling requirements. Confirm RoHS compliance status through the manufacturer's current product data sheet before finalizing procurement plans.

I/o Expanders Selection Notes

Select this component when upgrading from standard PCF8574 devices requiring higher bus speeds and drive currents. Ensure the design accommodates the 200 mA total package sink current limit if multiple outputs are active simultaneously. Verify that the system voltage aligns with the 2.3 V to 5.5 V operating range.

I/o Expanders Part Context

This part belongs to the PCA9670 series of remote I/O expanders designed for I2C-bus applications. It serves as a direct upgrade to legacy PCF8574 components, offering improved performance through Fast-mode Plus support and higher output drive capabilities while maintaining pin compatibility.

I/o Expanders Replacement Considerations

The PCA9670D512 is a documented variant within the same family. Verify if the specific suffix change alters the packaging format or manufacturing lot without affecting electrical functionality.