PCF8575CDWR

I/o Expanders Overview

The PCF8575CDWR is a remote 16-bit I2C and SMBus I/O expander featuring an interrupt output, manufactured by Texas Instruments. It operates within a supply voltage range of 2.5V to 5.5V and supports clock frequencies up to 400 kHz. The device provides 16 general-purpose digital I/O lines organized into two ports, utilizing a 24-pin SOIC package with a width of 7.50mm. It functions reliably across an extended temperature range from -40°C to +85°C. Key electrical characteristics include a maximum operating frequency of 0.4 MHz and compliance with RoHS standards.

I/o Expanders Feature Summary

• Provides 16-bit I/O expansion via standard I2C and SMBus serial interfaces
• Includes dedicated interrupt output pin for efficient host notification
• Supports wide supply voltage operation from 2.5V to 5.5V
• Features power-on reset (POR) circuitry to ensure defined initial states

I/o Expanders Applications

• Remote I/O expansion in embedded control systems
• Interface extension for microcontrollers with limited GPIO pins
• SMBus compatible peripheral management in industrial environments

I/o Expanders Procurement Notes

Verify the specific suffix 'CDWR' against the manufacturer's current datasheet to confirm package type and temperature grade. Ensure compatibility with system voltage levels and I2C bus speed requirements before integration. Check for any recent product change notices or end-of-life announcements directly from Texas Instruments documentation.

I/o Expanders Selection Notes

Select this component when 16 additional digital I/O lines are required over an I2C interface. Consider the 24-SOIC package constraints for PCB layout. Verify that the 400 kHz maximum clock rate meets system timing needs. Compare against other PCF8575 variants if different packaging or voltage ranges are preferred.

I/o Expanders Part Context

This part belongs to the PCF8575 family of 16-bit I/O expanders. It shares core functionality with variants like PCF8575DWR and PCF8575PWRE4 but differs in package style and potentially thermal characteristics. The CDWR suffix specifically denotes the SOIC-24 package configuration suitable for surface-mount assembly.

I/o Expanders Replacement Considerations

PCF8575DWR serves as a direct functional substitute within the same family. Other compatible options include PCA9535 or PCA9555 for similar I2C expansion needs, though register compatibility may vary.