PCA9555PWRG4

I/o Expanders Overview

The PCA9555PWRG4 is a 16-bit I/O expander designed for I2C and SMBus interfaces, manufactured by Texas Instruments. It operates within a supply voltage range of 2.3 V to 5.5 V and supports a maximum clock frequency of 400 kHz. The device features 16 general-purpose digital input/output pins, organized into two 8-bit ports. It is housed in a TSSOP-24 surface-mount package and functions reliably across an operating temperature range from -40°C to +85°C.

I/o Expanders Feature Summary

• Provides 16 general-purpose digital I/O expansion via standard I2C and SMBus protocols
• Operates with a wide supply voltage range supporting both low-voltage and 5V systems
• Configurable interrupt output capability for efficient event-driven monitoring

I/o Expanders Applications

• Portable devices requiring extended I/O capabilities within limited pin counts
• Industrial control systems utilizing I2C/SMBus communication networks
• Consumer electronics needing remote switching or sensing functionality

I/o Expanders Procurement Notes

Verify the complete part number including the G4 suffix to ensure RoHS compliance and specific manufacturing lot details. Confirm the TSSOP-24 package type matches your PCB footprint requirements. Check the latest datasheet for any updates regarding electrical characteristics or recommended operating conditions before finalizing component selection.

I/o Expanders Selection Notes

Select this component when a 16-bit expansion is required on an I2C bus. Ensure the system voltage falls between 2.3 V and 5.5 V. Consider the TSSOP-24 package constraints for board space. Verify that the target application requires open-drain outputs and compatible pull-up resistor configurations for reliable signal integrity at the chosen bus speed.

I/o Expanders Part Context

This part belongs to the PCA9555 family of 16-bit I/O expanders. The 'PWR' designation indicates the TSSOP-24 package style, while 'G4' signifies lead-free construction and RoHS compliance. It serves as a bridge between microcontrollers with limited pins and external peripherals requiring additional digital control lines.

I/o Expanders Replacement Considerations

The TCA9555PW is a pin-compatible alternative within the same family. Verify if the TCA variant offers any specific commercial-grade temperature range differences or updated feature sets compared to the industrial-grade PCA version before substitution.