PCA9554PWR

I/o Expanders Overview

The PCA9554PWR is an 8-bit I/O expander from Texas Instruments designed for I2C and SMBus interfaces. It operates within a supply voltage range of 2.3V to 5.5V and supports clock frequencies up to 400 kHz. The device features push-pull outputs capable of sourcing or sinking 10mA or 25mA, depending on the configuration. It includes an interrupt output pin and power-on reset (POR) functionality. Packaged in a 16-pin TSSOP with dimensions of 4.40mm width, it functions reliably across a temperature range of -40°C to 85°C.

I/o Expanders Feature Summary

• Supports I2C and SMBus communication protocols for system integration
• Provides configurable interrupt output for efficient event handling
• Includes internal configuration registers for flexible I/O direction control

I/o Expanders Applications

• Remote I/O expansion in embedded systems
• Consumer electronics requiring additional digital inputs or outputs
• Industrial control panels needing interface extension

I/o Expanders Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for specific ordering suffixes that may indicate tape-and-reel packaging variations. Ensure the part number matches the exact package type required for your PCB layout design.

I/o Expanders Selection Notes

Select this model when an 8-channel I/O expander with push-pull outputs is required. Consider the 16-pin TSSOP package constraints during board layout. Verify that the system voltage falls within the 2.3V to 5.5V operating range and that the I2C bus speed does not exceed 400 kHz.

I/o Expanders Part Context

This component belongs to the PCA9554 family of I/O expanders. It serves as a bridge between microcontrollers and peripheral devices, allowing for expanded digital connectivity without consuming additional MCU pins. The PWR suffix specifically denotes the TSSOP-16 surface-mount package variant manufactured by Texas Instruments.

I/o Expanders Replacement Considerations

TCA9554PWR is a recommended replacement offering similar functionality with potentially updated manufacturing processes. Other compatible variants include PCA9554PW and PCA9554DBR, though package differences must be accounted for during redesign.