TCA9517DGKR

The TCA9517DGKR is an I2C buffer with a hot-insertion capability designed for use in I2C bus and SMBus systems. This buffer allows bidirectional voltage-level translation between different I2C buses or devices, enabling seamless communication in mixed-voltage environments.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• GND: Ground
• VCAP: Bypass capacitor connection
• EN: Enable input for hot-insertion
• SCL1/SCL2: I2C clock input/output for bus 1 and bus 2
• SDA1/SDA2: I2C data input/output for bus 1 and bus 2
• VBUS1/VBUS2: Supply voltage for bus 1 and bus 2
• GND: Ground

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the TCA9517DGKR IC for a visual representation.

Key Features

• I2C Buffer with Hot-Insertion Capability: Enables voltage-level translation and hot-swapping of I2C devices without disruption.
• Bidirectional Voltage-Level Translation: Facilitates communication between I2C buses operating at different voltage levels.
• Wide Operating Voltage Range: Supports voltage translation between 1.2V and 5.5V, ensuring compatibility with a variety of systems.
• Fault-Isolation Circuitry: Provides protection for the system in case of voltage mismatch or shorts.
• Small Package: Available in a compact 8-pin VSSOP package for space-constrained applications.

Note: For detailed technical specifications, please refer to the TCA9517DGKR datasheet.

Application

• Mixed-Voltage I2C Systems: Ideal for applications where different I2C devices operate at varying voltage levels on the same bus.
• Hot-Swapping Scenarios: Suitable for systems requiring hot-swapping of I2C devices without disrupting the communication.
• Signal Conversion: Used to convert logic levels in mixed-voltage environments to ensure seamless data transmission.

Functionality

The TCA9517DGKR acts as a bridge between I2C buses operating at different voltage levels, allowing for smooth and uninterrupted communication between various devices.

Usage Guide

• Power Supply: Connect VBUS1 and VBUS2 (Pins 6 and 7) to the respective supply voltages of the I2C buses.
• Enable Pin: Control the EN (Pin 3) input to manage the hot-insertion capability of the buffer.
• Data and Clock Lines: Connect the SCL and SDA lines of the buses to the corresponding pins of the buffer for bidirectional communication.

Frequently Asked Questions

Q: Can the TCA9517DGKR handle voltage translation above 5.5V?
A: The TCA9517DGKR is designed for voltage translation within the range of 1.2V to 5.5V. Exceeding this range may result in improper operation.

Q: Is the TCA9517DGKR compatible with SMBus systems?
A: Yes, the TCA9517DGKR is suitable for use in SMBus systems as it supports I2C communication protocols.