PCA9674APW,118

I/o Expanders Overview

The PCA9674APW,118 is an 8-bit remote I/O expander for the Fast-mode Plus (Fm+) I2C bus. It operates between 2.3 V and 5.5 V with 5.5 V tolerant I/Os. The device features a 1 MHz I2C interface, 30 mA SDA sink capability, and latched outputs with 25 mA sink drive per pin. Total package sink capability is 200 mA. It provides 64 programmable slave addresses via three hardware address pins and includes an active LOW open-drain interrupt output. The TSSOP16 package supports -40 °C to +85 °C operation.

I/o Expanders Feature Summary

• Fast-mode Plus I2C interface supporting up to 1 MHz data transfer rates
• High current sink capability of 30 mA on SDA line for buses with high capacitance
• Latched quasi-bidirectional outputs capable of directly driving LEDs at 25 mA per pin
• Active LOW open-drain interrupt output for efficient microcontroller notification

I/o Expanders Applications

• LED signs and displays
• Servers
• Industrial control systems
• Medical equipment
• Cellular telephones

I/o Expanders Procurement Notes

Verify the specific ordering suffix ',118' corresponds to the Reel 13” Q1/T1 packing method when sourcing components. Confirm that the manufacturer designation matches NXP Semiconductors rather than generic distributors. Ensure the part number aligns with the TSSOP16 package variant specified in official documentation.

I/o Expanders Selection Notes

Select this component when system design requires expansion of I/O ports beyond available microcontroller pins while maintaining high-speed communication. The Fm+ interface allows for faster data transfer compared to standard I2C devices. Consider the 64-address capability if multiple expanders are needed on a single bus without buffer amplifiers.

I/o Expanders Part Context

This device belongs to the PCA9674/PCA9674A family of remote I/O expanders. It serves as an upgrade to older PCF8574 series devices by offering higher bus speeds and greater drive capabilities. The 'A' suffix indicates a specific non-overlapping address range compared to the base PCA9674 model.

I/o Expanders Replacement Considerations

PCF8574: Lower speed and drive capability. PCA8574: Faster but lower drive than PCA9674. PCA9674A: Identical functionality but different address map.