TCA9802DGKT

The TCA9802DGKT is a dual-channel I2C bus buffer and level shifter manufactured by Texas Instruments. This device is designed to facilitate communication between devices operating at different voltage levels on the I2C bus, making it particularly useful in mixed-voltage systems.

Key Features:

1. Dual-Channel Buffer: The TCA9802 provides two independent channels, allowing it to buffer two separate I2C buses. This is beneficial for applications that require isolation between different I2C devices or segments.

2. Level Shifting: The device supports level shifting between two different voltage levels, typically from a lower voltage (e.g., 1.8V) to a higher voltage (e.g., 5V) or vice versa. This capability is essential for interfacing modern low-voltage microcontrollers with legacy I2C devices.

3. Wide Supply Voltage Range: The TCA9802 operates with a supply voltage range from 1.8V to 5.5V, making it versatile for various applications. This flexibility allows it to be used in battery-powered devices as well as in systems powered by standard voltage rails.

4. High-Speed Operation: The device supports standard I2C speeds of up to 1 MHz, ensuring that it can handle high-speed data transfers without introducing significant delays.

5. Low Power Consumption: The TCA9802 is designed for low power operation, which is crucial for battery-operated devices. It features a low quiescent current, helping to extend battery life.

6. Active Pull-Up Resistors: The device includes active pull-up resistors on the I2C lines, which help to maintain signal integrity and improve rise times, especially in longer bus configurations.

7. Open-Drain Outputs: The outputs of the TCA9802 are open-drain, allowing multiple devices to be connected to the same bus without contention, which is a standard requirement for I2C communication.

8. Thermal and Electrical Protection: The TCA9802 is designed with built-in protection features to safeguard against over-voltage and over-current conditions, enhancing the reliability of the system.

Package Information:

The TCA9802DGKT is available in a small, compact package (typically a VQFN or TQFP), which is suitable for space-constrained applications. The package design allows for easy integration into printed circuit boards (PCBs) while maintaining a low profile.

Applications:

The TCA9802 is ideal for a variety of applications, including:

• Consumer Electronics: Used in devices like smartphones, tablets, and smart home products where different components may operate at different voltage levels.
• Industrial Automation: Facilitates communication between sensors and controllers that operate at different voltages.
• Automotive Systems: Helps in interfacing various automotive sensors and controllers that may have different power supply requirements.
• IoT Devices: Supports the integration of low-power IoT devices with higher voltage systems, enabling seamless communication.

In summary, the TCA9802DGKT from Texas Instruments is a versatile and efficient solution for I2C bus buffering and level shifting, making it an essential component in modern electronic designs that require interoperability between different voltage levels.