PCF8574APWRE4

I/o Expanders Overview

The PCF8574APWRE4 is a remote 8-bit I/O expander for the I2C bus manufactured by Texas Instruments. It operates within a supply voltage range of 2.5 V to 6 V and supports a maximum clock frequency of 100 kHz. The device features an open-drain interrupt output and provides latch-up performance exceeding 100 mA per JESD 78, Class II. It is housed in a TSSOP-20 package with an operating temperature range from -40°C to +85°C. The component draws a maximum standby current of 10 μA and includes ESD protection rated at 1 kV via the human-body model.

I/o Expanders Feature Summary

• Provides general-purpose remote I/O expansion for microcontroller families via the I2C interface
• Features latched outputs with high-current drive capability suitable for directly driving LEDs
• Includes an open-drain interrupt output that signals incoming data without requiring continuous bus communication

I/o Expanders Applications

• Telecom shelters including filter units
• Servers and routers for telecom switching equipment
• Personal computers and personal electronics
• Industrial automation systems
• Products utilizing GPIO-limited processors

I/o Expanders Procurement Notes

Verify the specific ordering suffix RE4 corresponds to the tape-and-reel packaging configuration required for your assembly line. Confirm the component status as End-of-Life or obsolete through official Texas Instruments channels before finalizing procurement plans. Ensure all electrical parameters align with your system design requirements.

I/o Expanders Selection Notes

Select this component when expanding I/O capabilities on standard I2C buses with limited pins. Verify that the 2.5 V to 6 V operating voltage matches your system power rails. Consider the TSSOP-20 package dimensions for PCB layout constraints. Ensure the 100 kHz clock speed meets your communication timing requirements.

I/o Expanders Part Context

This part belongs to the PCF8574A series of remote I/O expanders. It shares functional characteristics with other variants such as PCF8574APW and PCF8574DGVR, differing primarily in package type and reel specifications. The PCF8574A series is designed for low-power applications requiring efficient I/O expansion over serial interfaces.

I/o Expanders Replacement Considerations

PCF8574APWR is a confirmed substitute with identical functionality but different packaging.