PCF8574APWR

I/o Expanders Overview

The PCF8574APWR is an 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 latched outputs with high-current drive capability. It is housed in a TSSOP-20 package and functions across an operating temperature range of -40°C to +85°C.

I/o Expanders Feature Summary

• Provides remote I/O expansion via the two-line bidirectional I2C interface
• Features quasi-bidirectional I/O ports without data-direction control signals
• Includes an open-drain interrupt output triggered by port input edges

I/o Expanders Applications

• Telecom shelters: filter units
• Servers
• Routers (telecom switching equipment)
• Personal computers
• Products with GPIO-limited processors

I/o Expanders Procurement Notes

Verify the specific ordering suffix 'PW' corresponds to the TSSOP-20 package variant required for your design. Confirm that the component meets RoHS standards if applicable to your manufacturing process. Ensure compatibility with your system's I2C bus voltage levels before integration.

I/o Expanders Selection Notes

Select this component when expanding microcontroller I/O capabilities using the I2C protocol. It is suitable for applications requiring low standby current and direct LED driving. Consider the TSSOP-20 package constraints and ensure adequate pull-up resistors are included for SDA and SCL lines.

I/o Expanders Part Context

This part belongs to the PCF8574A family of remote 8-bit I/O expanders. It shares functional characteristics with other variants in the series but differs in packaging. The 'APWR' designation indicates the specific manufacturer prefix and surface-mount package type.

I/o Expanders Replacement Considerations

PCF8574APWRE4 is a verified substitute part number.