PCA9674ATS,112

I/o Expanders Overview

The PCA9674ATS,112 is an NXP remote 8-bit I/O expander for the Fast-mode Plus (Fm+) I2C-bus. It provides eight quasi-bidirectional ports and operates with a supply voltage range of 2.3 V to 5.5 V. The device features a 1 MHz I2C interface and supports up to 64 programmable slave addresses via three hardware address pins. It includes an active LOW open-drain interrupt output and latched outputs capable of 25 mA sink current. The component is housed in a TSSOP16 package.

I/o Expanders Feature Summary

• Supports 1 MHz I2C bus interface for high-speed data transfer
• Provides 64 programmable slave addresses using three address pins
• Features latched outputs with 25 mA sink capability for direct LED driving
• Includes active LOW open-drain interrupt output for microcontroller notification

I/o Expanders Applications

• LED signs and displays
• Servers
• Industrial control systems
• Medical equipment
• PLCs

I/o Expanders Procurement Notes

Verify the specific ordering suffix

I/o Expanders Selection Notes

Select this component when a system requires expanding I/O capabilities over an I2C bus with high speed requirements. The Fm+ interface allows for faster communication compared to standard I2C devices. Ensure the application benefits from the ability to drive LEDs directly or monitor keypad inputs without continuous polling.

I/o Expanders Part Context

This part belongs to the PCA9674 family of remote I/O expanders. It is functionally identical to the PCA9674A but utilizes a non-overlapping address map, allowing both types to coexist on the same bus. It serves as an upgrade to older PCF8574 series devices by offering higher bus speeds and drive capabilities.

I/o Expanders Replacement Considerations

PCA9674APW,112

I/o Expanders FAQ

How many slave addresses can be configured?

The PCA9674 supports 64 programmable slave addresses using three hardware address pins.

What is the maximum I2C bus speed?

The device supports a 1 MHz I2C bus interface, which is part of the Fast-mode Plus (Fm+) specification.

Can the outputs drive LEDs directly?

Yes, the latched outputs have a 25 mA sink capability, allowing them to directly drive LEDs.