Texas Instruments

TCA9517DR

TCA9517DR Description

The TCA9517DR from Texas Instruments is a bidirectional I²C voltage-level translator designed to interface between low-voltage (0.9V–5.5V) and higher-voltage (2.7V–5.5V) systems. Housed in an 8-pin SOIC package and available in Tape & Reel (TR), this single-circuit, dual-channel translator ensures seamless communication between devices operating at different logic levels. It features open-drain outputs and supports hot-swappable applications, making it ideal for mixed-voltage I²C bus systems. With RoHS3 compliance and REACH unaffected status, it meets stringent environmental and safety standards.

TCA9517DR Features

• Wide Voltage Range: Supports VCCA (0.9V–5.5V) and VCCB (2.7V–5.5V), enabling compatibility with diverse logic levels.
• Bidirectional Translation: Seamlessly bridges I²C/SMBus communication between asymmetric voltage domains.
• Open-Drain Outputs: Ensures proper level shifting without signal distortion for I²C clock (SCL) and data (SDA) lines.
• Hot-Swap Capable: Prevents bus contention during live insertion, enhancing system reliability.
• Low Standby Current: Optimized for power-sensitive applications.
• Robust ESD Protection: Withstands ±8kV HBM for improved durability in harsh environments.
• MSL1 (Unlimited): Suitable for extended storage and handling without moisture concerns.

TCA9517DR Applications

• Mixed-Voltage I²C Systems: Connects low-voltage processors (e.g., 1.8V MCUs) to 5V peripherals (sensors, EEPROMs).
• Industrial Automation: Interfaces 3.3V controllers with 5V PLCs or legacy equipment.
• Consumer Electronics: Enables communication between battery-powered devices (1.2V–3.3V) and 5V display drivers.
• Automotive Systems: Integrates infotainment modules with CAN/LIN bus components at different voltages.
• IoT Edge Devices: Facilitates energy-efficient data exchange in multi-voltage sensor networks.

Conclusion of TCA9517DR

The TCA9517DR stands out as a highly reliable, bidirectional voltage-level translator for I²C/SMBus applications. Its wide voltage range, robust ESD protection, and hot-swap capability make it superior to basic level shifters, particularly in mixed-voltage embedded systems. Whether in industrial, automotive, or IoT designs, this IC ensures signal integrity and power efficiency, solidifying its role as a critical component in modern electronics.