PCF8575CDBR

I/o Expanders Overview

The PCF8575CDBR is a remote 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It provides general-purpose digital input and output expansion via the I2C two-line interface. The device features an interrupt output to signal data changes to the microprocessor. It operates within a supply voltage range of 2.5 V to 5.5 V and supports clock frequencies up to 400 kHz. The component is housed in a 24-pin SOIC package and is rated for an operating temperature range from -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 16-bit I/O expansion through standard I2C and SMBus communication protocols
• Includes dedicated interrupt output pin to notify host of external events
• Compatible with multiple I2C standard speed modes including fast mode
• Operates across a wide industrial temperature range

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 equipment

I/o Expanders Procurement Notes

Verify the specific suffix 'CDWR' or 'DBR' against the manufacturer's current datasheet to confirm package type and tape/reel specifications. Ensure the ordered variant matches the required thermal performance and pinout configuration for the target PCB layout. Cross-reference the active status with official distribution channels to avoid obsolete stock.

I/o Expanders Selection Notes

Select this component when 16 bidirectional I/O lines are required over an I2C bus. Confirm that the system voltage falls within the 2.5 V to 5.5 V operational window. Verify that the I2C bus speed requirements do not exceed the 400 kHz limit. Check if the interrupt functionality is necessary for the application timing constraints compared to polling methods.

I/o Expanders Part Context

This part belongs to the PCF8575 family of remote I/O expanders. It shares functional similarities with other 16-bit I2C expanders but is distinguished by its specific package marking and manufacturing revision. The 'C' designation typically indicates the commercial temperature grade variant within the broader product line.

I/o Expanders Replacement Considerations

Direct pin-to-pin replacements include the PCF8575CDWR and PCF8575IDWR from Texas Instruments. NXP Semiconductors offers the PCA8575 as a functionally equivalent alternative. Verify voltage levels and interrupt polarity settings when substituting with these parts.