TCA9554ADBR

Overview

The TCA9554ADBR is a low-voltage 8-bit I2C and SMBus I/O expander manufactured by Texas Instruments. It operates within a supply voltage range of 1.65 V to 5.5 V, supporting communication at clock frequencies up to 400 kHz. The device features eight open-drain outputs with configurable input/output functionality via internal configuration registers. It includes an interrupt output pin for efficient event monitoring. Designed for surface-mount installation, it is housed in a 16-pin SSOP package. The component supports an operating temperature range from -40°C to +85°C and provides 2 kV ESD protection.

Feature Summary

• Configurable I/O direction control through dedicated configuration registers
• Interrupt output capability for asynchronous status signaling
• Wide supply voltage compatibility for mixed-voltage system integration

Applications

• Remote I/O expansion in embedded systems
• Consumer electronics requiring additional GPIO pins
• Industrial control interfaces utilizing I2C or SMBus protocols

Procurement Notes

Verify the specific package variant and revision level against the manufacturer's latest datasheet before procurement. Ensure that the ordering suffix corresponds to the required tape-and-reel quantity and handling specifications. Confirm RoHS compliance status and moisture sensitivity classification requirements for your assembly process. Cross-reference the part number with authorized distributors to ensure authenticity and traceability.

Selection Notes

Select this component when an 8-bit I/O expansion solution is required with I2C/SMBus interface compatibility. Consider the 1.65 V to 5.5 V operating range for flexibility in power supply design. The SSOP-16 package is suitable for applications where space constraints allow for this specific footprint. Evaluate the interrupt output feature if real-time status polling is necessary for system efficiency.

Part Context

The TCA9554ADBR belongs to the TCA9554A series of low-power I/O expanders. It serves as a digital input and output expansion device for microcontrollers and processors. The 'DBR' suffix indicates the SSOP-16 package type and reel packaging format. This series is designed to provide flexible I/O management in compact electronic designs.

Replacement Considerations

The PCA9554 is a related device but typically operates on a higher minimum voltage (2.3 V). Verify voltage compatibility before substitution. Other members of the TCA9554A family may offer different packages or features. Consult the official replacement guide for direct pin-compatible alternatives.