PCA9674PW,118

I/o Expanders Overview

The PCA9674PW,118 is an 8-bit 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 interface, 30 mA SDA sink capability, and latched outputs with 25 mA sink drive for direct LED connection. Total package sink capability reaches 200 mA. Sixty-four programmable slave addresses are available via three hardware address pins. An active LOW open-drain interrupt output signals input state changes. The TSSOP16 package supports operation from -40 °C to +85 °C.

I/o Expanders Feature Summary

• Fast-mode Plus I2C interface supporting up to 1 MHz data transfer rates
• Active LOW open-drain interrupt output for efficient event-driven monitoring
• Latched outputs providing 25 mA sink current for direct LED driving
• Sixty-four unique slave addresses configurable through three hardware pins

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 containing 2500 units per reel. Confirm the TSSOP16 package variant matches the required board layout dimensions. Ensure the component version aligns with the Rev 7 datasheet specifications before finalizing procurement orders.

I/o Expanders Selection Notes

Select this model when high-speed Fm+ communication at 1 MHz is required alongside significant I/O expansion. The 25 mA per-pin sink capability allows direct LED interfacing without external transistors. Verify that the 64-address range fits the system topology. Consider the TSSOP16 package constraints if space is limited compared to SO16 or HVQFN16 alternatives.

I/o Expanders Part Context

This component belongs to the PCA9674/PCA9674A family of remote I/O expanders designed as upgrades to legacy PCF8574 devices. It offers superior speed and drive strength over standard I2C models. The PW suffix specifically denotes the plastic thin shrink small outline package with 16 leads and a 4.4 mm body width.

I/o Expanders Replacement Considerations

The PCA9674APW serves as a functional alternative with non-overlapping addresses. Legacy replacements include the PCF8574 and PCA8574, though these lack Fm+ support and lower drive capabilities.