PCA9674ATS,118

I/o Expanders Overview

The PCA9674ATS,118 is an 8-bit I/O expander for the Fast-mode Plus (Fm+) I2C-bus. It operates with a supply voltage range of 2.3 V to 5.5 V and features 5.5 V tolerant I/Os. The device provides 8 quasi-bidirectional ports that default to inputs at power-up. It supports a 1 MHz I2C interface with SDA sink capability of 30 mA. Latched outputs offer 25 mA sink current per pin and a total package sink capability of 200 mA. The component includes an active LOW open-drain interrupt output and allows 64 programmable slave addresses via three hardware address pins.

I/o Expanders Feature Summary

• Supports 1 MHz I2C bus communication with high drive capability
• Features latched outputs capable of directly driving LEDs
• Includes active LOW open-drain interrupt output for state monitoring
• Provides 64 programmable slave addresses using three hardware pins

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 against official NXP documentation to confirm package type and tape-and-reel specifications. Confirm the exact device variant matches the required address map before procurement. Ensure compatibility with existing system voltage levels and I2C bus configurations.

I/o Expanders Selection Notes

Select this component when high-speed Fm+ I2C communication is required alongside direct LED driving capabilities. Consider the 64-address capability for complex multi-device bus topologies. Evaluate the 200 mA total package sink limit against the simultaneous load requirements of the application design.

I/o Expanders Part Context

This part belongs to the PCA9674 family of remote I/O expanders designed as upgrades to legacy PCF8574 devices. It offers enhanced speed and drive strength compared to standard I2C interfaces. The 'A' designation indicates a non-overlapping address range relative to the base model, allowing mixed usage on the same bus.

I/o Expanders Replacement Considerations

PCA9674ABS-T is a confirmed substitute within the same product family offering identical functionality.