TCA9554PWR

Overview

The TCA9554PWR is an 8-bit I/O expander from Texas Instruments, operating on a 1.65V to 5.5V supply voltage range. It features an I2C and SMBus interface with a maximum clock frequency of 400 kHz. The device provides 8 general-purpose digital input/output pins in a 16-pin TSSOP package. Key electrical specifications include a 2 kV ESD protection rating and a typical output current capability of 25 mA. It supports configuration registers for pin direction settings and includes an interrupt output pin. The component operates within a temperature range of -40°C to +85°C.

Feature Summary

• Supports remote 8-bit I/O expansion via standard I2C and SMBus protocols
• Includes dedicated interrupt output pin for efficient event handling
• Features configurable configuration registers for individual pin direction control

Applications

• Portable devices requiring extended I/O capabilities
• Industrial control systems utilizing I2C communication
• Consumer electronics with limited microcontroller pins

Procurement Notes

Verify the specific suffix 'PWR' corresponds to the TSSOP-16 package and reel packaging format as listed in official distributor catalogs. Confirm RoHS compliance status through the manufacturer's datasheet or certification documents before integration into regulated assemblies.

Selection Notes

Select this component when low-voltage operation down to 1.65V is required compared to the PCA9554A series which starts at 2.3V. Ensure the design accommodates the 400 kHz I2C speed limit and utilizes the interrupt functionality if real-time response is necessary for input changes.

Part Context

This part belongs to the TCA9554A family of remote 8-bit I/O expanders. It serves as a functional alternative to the legacy PCA9554 series, offering enhanced low-voltage compatibility while maintaining pin-to-pin and register-level compatibility for easier migration in existing designs.

Replacement Considerations

The PCA9554APWRG4 is a related variant within the same product family. Note that the PCA9554A series has a minimum operating voltage of 2.3V, whereas the TCA9554A series supports 1.65V. Verify voltage requirements before substitution.