PCF8574APWRG4

I/o Expanders Overview

The PCF8574APWRG4 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 general-purpose remote I/O expansion via the I2C interface. It utilizes a TSSOP-20 package with surface-mount installation. The operating temperature range spans from -40°C to +85°C. Key electrical characteristics include a maximum standby current of 10 μA and latch-up performance exceeding 100 mA per JESD 78, Class II.

I/o Expanders Feature Summary

• Provides eight quasi-bidirectional I/O lines that function as inputs or outputs without data-direction control signals.
• Features latched outputs with high-current drive capability suitable for directly driving LEDs.
• Generates interrupts via an open-drain output pin triggered by rising or falling edges on port inputs.

I/o Expanders Applications

• Telecom shelters including filter units
• Servers and routers in 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 'G4' against the manufacturer's official documentation to confirm compliance details and package variations. Ensure the component matches the required TSSOP-20 form factor and verify RoHS status through the latest datasheet revision. Confirm availability and lead times directly with authorized distributors or the manufacturer before finalizing procurement plans.

I/o Expanders Selection Notes

Select this component when expanding I/O capabilities for microcontrollers using the I2C protocol. It is suitable for applications requiring low standby current and direct LED driving. Ensure the system voltage falls between 2.5 V and 6 V. Consider the open-drain interrupt feature if event-driven processing is required instead of continuous polling.

I/o Expanders Part Context

This part belongs to the PCF8574A series of remote 8-bit I/O expanders designed for I2C bus communication. It serves as a peripheral device to extend the input and output capacity of microcontroller-based systems. The device simplifies interface design by allowing multiple units to be connected on the same bus using address pins A0, A1, and A2.

I/o Expanders Replacement Considerations

Consult the manufacturer's official cross-reference documentation for verified substitute part numbers. Ensure any replacement maintains compatibility with the I2C interface, voltage range, and package dimensions.