PCF8575DW

I/o Expanders Overview

The PCF8575DW is a remote 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments, housed in a 24-pin SOIC package. It operates within a supply voltage range of 2.5 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features an interrupt output pin for efficient event handling and includes power-on reset (POR) functionality. It is designed for surface-mount installation with an operating temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 16 bidirectional I/O lines accessible via standard I2C and SMBus protocols
• Includes a dedicated interrupt output pin to signal data changes to the host processor
• Integrates power-on reset logic to ensure predictable initial states upon power-up

I/o Expanders Applications

• Remote input/output expansion in embedded control systems
• Interface extension for microcontrollers using I2C or SMBus buses
• Consumer electronics requiring additional GPIO capabilities

I/o Expanders Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm package type and electrical characteristics. Ensure compatibility with system voltage levels and bus speed requirements before integration. Cross-reference manufacturer part numbers to avoid confusion with similar variants.

I/o Expanders Selection Notes

Select this component when 16 digital I/O lines are required over an I2C interface. Confirm that the 24-SOIC package fits the PCB layout constraints. Validate that the 400 kHz maximum clock rate meets the communication speed needs of the application design.

I/o Expanders Part Context

This device belongs to the PCF8575 family of I/O expanders from Texas Instruments. It shares core functionality with other variants like the PCF8575DWR but differs in packaging specifications. The family is widely used for extending microcontroller ports in space-constrained designs.

I/o Expanders Replacement Considerations

PCF8575DWR is a documented alternative with identical electrical performance but utilizes a tape-and-reel packaging format instead of cut tape.