PCA9674APW,112

I/o Expanders Overview

The PCA9674APW,112 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. Operating temperature range is -40 °C to +85 °C.

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 I/O ports with 25 mA direct LED drive capability
• Active LOW open-drain interrupt output for efficient input state monitoring

I/o Expanders Applications

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

I/o Expanders Procurement Notes

Verify the ordering suffix matches the required packaging format. The '112' suffix indicates TSSOP16 tube packaging. Confirm the specific variant against the datasheet's ordering table to ensure correct address mapping and package type before procurement.

I/o Expanders Selection Notes

Select this component when high-speed Fm+ communication and significant I/O expansion are required. Ensure the system voltage falls within the 2.3 V to 5.5 V range. Verify that the 25 mA per-pin and 200 mA total sink limits accommodate the connected load requirements without exceeding thermal constraints.

I/o Expanders Part Context

This part belongs to the PCA9674/PCA9674A family of remote I/O expanders. The PCA9674 and PCA9674A variants share identical functionality but utilize non-overlapping address ranges, allowing up to 126 devices on a single bus. This specific model uses the PCA9674 address map.

I/o Expanders Replacement Considerations

PCF8574 series offers similar I/O expansion but lacks Fm+ speed and high drive capabilities. PCA8574 series provides improved drive over PCF8574 but does not support 1 MHz operation or the same address density as the PCA9674 family.