PCF8575CPW

I/o Expanders Overview

The PCF8575CPW is a remote 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It provides general-purpose parallel input/output expansion for microcontrollers via the two-wire bidirectional I2C bus. The device operates within a supply voltage range of 2.5 V to 5.5 V and supports clock frequencies up to 400 kHz. It features an open-drain interrupt output (INT) to signal data events. The component is housed in a 24-pin TSSOP package and is rated for an operating temperature range from -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 16-bit remote I/O expansion through a standard I2C interface
• Includes an open-drain interrupt output pin for event signaling
• Supports high-current latch outputs capable of directly driving LEDs

I/o Expanders Applications

• Microcontroller systems requiring additional digital input/output pins
• Consumer electronics with limited MCU GPIO availability
• Industrial control panels utilizing I2C communication protocols

I/o Expanders Procurement Notes

Verify the specific suffix 'CPW' corresponds to the TSSOP-24 package variant when sourcing. Confirm RoHS compliance status and lead times with authorized distributors, as availability may vary by region. Ensure the ordering part number matches the required package style and temperature grade for your design specifications.

I/o Expanders Selection Notes

Select this component when a system requires expanding 16 digital I/O lines using an existing I2C bus. It is suitable for applications needing direct LED driving capabilities or simple digital sensing. Consider the 24-pin TSSOP footprint during PCB layout. Verify that the host microcontroller supports the required I2C speed and address configuration for multiple devices on the same bus.

I/o Expanders Part Context

The PCF8575CPW belongs to the PCF8575 family of I/O expanders from Texas Instruments. This series is designed to extend the I/O capabilities of various microcontroller families without consuming additional hardware interfaces. The CPW designation specifically identifies the plastic small-outline package variant within the broader product line.

I/o Expanders Replacement Considerations

Compatible alternatives include the PCA9535 and PCA9555, which offer similar 16-bit I2C expansion functionality. Verify pin compatibility and register mapping before substitution to ensure seamless integration into existing firmware and hardware designs.