PCF8575PW

I/o Expanders Overview

The PCF8575PW is a remote 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It provides eight quasi-bidirectional inputs and outputs on Port 0 and Port 1, accessible via the two-line bidirectional serial 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 interrupt output pin that activates when any input state changes. The component is housed in a 24-pin TSSOP package and is designed for low-power applications with a typical operating current of 200 µA.

I/o Expanders Feature Summary

• Provides 16 general-purpose digital input/output pins expandable via I2C interface
• Includes dedicated interrupt output pin for efficient event-driven communication
• Supports standard and fast-mode I2C protocols with SMBus compatibility

I/o Expanders Applications

• Remote I/O expansion for microcontroller systems requiring additional digital pins
• Industrial control panels needing isolated input monitoring
• Consumer electronics utilizing space-constrained surface-mount designs

I/o Expanders Procurement Notes

Verify the specific suffix 'PW' corresponds to the TSSOP-24 package variant during sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets. Ensure the ordering part number matches the required temperature grade and packaging format for your production line.

I/o Expanders Selection Notes

Select this component when a 16-bit expansion is required without configuration registers. Compare against PCA9535 if hardware-configurable direction settings are necessary. Verify that the open-drain output structure aligns with the target system's pull-up requirements and voltage levels.

I/o Expanders Part Context

This device belongs to the PCF8575 family of I/O expanders from Texas Instruments. It shares functional similarities with NXP Semiconductors' original PCF8575 design but includes TI-specific manufacturing variations. The PW suffix specifically denotes the thin-shrink small-outline package suitable for high-density PCB layouts.

I/o Expanders Replacement Considerations

PCF8575PWRE4 is a verified equivalent variant within the same product family. Cross-reference with PCA9535 only if configuration register functionality is required, noting differences in pin definitions.