PCA9555DWRG4

I/o Expanders Overview

The PCA9555DWRG4 is a remote 16-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It provides eight quasi-bidirectional inputs and outputs on two ports, accessible via the I2C serial interface. The device operates within a supply voltage range of 2.3 V to 5.5 V and supports clock frequencies up to 400 kHz. It features an interrupt output pin that signals state changes to the host processor. The component is housed in a 24-pin SOIC package and is designed for surface-mount installation. It includes configuration registers to define input or output directions for each pin.

I/o Expanders Feature Summary

• Provides 16 bidirectional I/O channels accessible via standard I2C communication protocols
• Includes an interrupt output mechanism to notify the system of external events
• Supports configurable direction settings for individual pins through internal registers

I/o Expanders Applications

• Embedded systems requiring additional digital I/O lines
• Industrial control panels with limited microcontroller pins
• Consumer electronics devices needing port expansion

I/o Expanders Procurement Notes

Verify the exact part number suffix against official manufacturer documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with existing I2C bus voltage levels before integration. Confirm RoHS compliance status through current datasheets as regulatory requirements may evolve over time.

I/o Expanders Selection Notes

Select this component when a design requires expanding digital input and output capabilities using the I2C interface. Consider the operating voltage range and package constraints during selection. Evaluate the need for interrupt functionality if real-time event detection is required for the application.

I/o Expanders Part Context

This part belongs to the PCA9555 series of I/O expanders from Texas Instruments. It shares functional similarities with other members of the family but differs in packaging and specific ordering suffixes. The DWRG4 designation indicates a specific reel-based packaging format compliant with environmental standards.

I/o Expanders Replacement Considerations

Direct substitutes include the PCA9555DR and PCA9555PW. Verify pin compatibility and electrical characteristics before substitution. Ensure the alternative part meets the same voltage and temperature requirements.