PCA9675D,118

I/o Expanders Overview

The PCA9675D,118 is a remote 16-bit I/O expander for Fast-mode Plus I2C-bus applications. It provides general-purpose remote I/O expansion via the two-line bidirectional bus and operates between 2.3 V and 5.5 V with 5.5 V tolerant I/Os. The device features latched outputs with 25 mA sink capability for directly driving LEDs and a total package sink capacity of 400 mA. It supports 1 MHz I2C-bus interface speeds compliant with Fast and Standard modes. The SDA pin offers 30 mA sink capability for buses up to 4000 pF. Sixty-four programmable slave addresses are available using three address pins. An active LOW open-drain interrupt output allows the device to signal incoming data without continuous communication.

I/o Expanders Feature Summary

• Provides 16-bit quasi-bidirectional I/O ports that default to inputs at power-up
• Features latched outputs with high current drive capability for direct LED driving
• Supports 1 MHz Fast-mode Plus I2C-bus interface speeds
• Includes an active LOW open-drain interrupt output for event signaling

I/o Expanders Applications

• LED signs and displays
• Servers
• Industrial control systems
• Programmable logic controllers (PLCs)
• Instrumentation and test measurement equipment

I/o Expanders Procurement Notes

Verify the ordering suffix matches the required package type. Confirm the manufacturer identification through the Device ID register if necessary. Ensure the I2C bus voltage levels align with the specified operating range. Check for any specific environmental or reliability certifications required by the application standards.

I/o Expanders Selection Notes

Select this component when a drop-in upgrade from PCF8575 is needed for higher bus speeds and drive capabilities. Consider the 64 available addresses for complex multi-device systems. Evaluate the 400 mA total package sink capacity against the simultaneous load requirements of connected peripherals.

I/o Expanders Part Context

The PCA9675D,118 belongs to the PCA9675 series of remote I/O expanders. It is designed as a successor to the PCF8575, offering enhanced performance characteristics such as increased clock frequency and drive strength. The 'D' designation indicates the SO24 plastic small outline package variant.

I/o Expanders Replacement Considerations

The PCF8575 serves as a functional predecessor but lacks the Fm+ speed and higher drive currents. Verify compatibility regarding address mapping and interrupt handling when transitioning between these devices.