PCA9674AN,112

I/o Expanders Overview

The PCA9674AN,112 is an NXP Semiconductors remote I/O expander for the Fast-mode Plus (Fm+) I2C-bus. It provides eight quasi-bidirectional ports with a 1 MHz interface and supports up to 64 programmable slave addresses via three hardware address pins. The device operates between 2.3 V and 5.5 V, features latched outputs with 25 mA sink capability, and includes an active LOW open-drain interrupt output. It offers a total package sink capability of 200 mA and low standby current consumption.

I/o Expanders Feature Summary

• Supports 1 MHz I2C-bus Fast-mode Plus interface
• Provides 8-bit remote I/O with latched outputs
• Features active LOW open-drain interrupt output
• Offers 64 programmable slave addresses

I/o Expanders Applications

• LED signs and displays
• Servers
• Key pads
• Industrial control
• Medical equipment

I/o Expanders Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm the specific ordering suffix matches the required packaging format. Ensure compliance with RoHS directives and check for any end-of-life notices before finalizing procurement plans.

I/o Expanders Selection Notes

Select this component when high-speed Fm+ communication is required alongside direct LED driving capabilities. Consider the 64-address range for complex bus topologies without buffers. Verify that the TSSOP16 package fits the board layout constraints and thermal requirements.

I/o Expanders Part Context

This part belongs to the PCA9674 family, designed as a replacement for older PCF8574 series devices. It offers improved speed and drive strength while maintaining pin compatibility in many applications. The family supports extensive addressing options for large-scale I/O expansion projects.

I/o Expanders Replacement Considerations

PCA9674AD,112 serves as a functional alternative within the same family, distinguished by non-overlapping address ranges. Both variants share identical electrical characteristics and pinouts, allowing for flexible system design without hardware modifications.