TCA9509DGKR

The TCA9509DGKR is a dual I2C bus buffer and level shifter manufactured by Texas Instruments. It 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 Buffering: The TCA9509 provides two independent I2C bus buffers, allowing for the isolation of two separate I2C buses. This is beneficial in applications where multiple devices need to communicate without interference.

2. Voltage Level Shifting: The device supports level shifting between two different voltage domains, typically from a lower voltage (e.g., 1.8V) to a higher voltage (e.g., 5V). This feature is crucial for interfacing modern low-voltage microcontrollers with higher-voltage peripherals.

3. I2C Compatibility: The TCA9509 is fully compatible with the I2C protocol, supporting standard and fast-mode I2C communication. It can operate at speeds up to 1 MHz, making it suitable for a wide range of applications.

4. Active Low Enable Pins: The device includes enable pins that allow for easy control of the buffer operation. When the enable pin is low, the buffer is active, allowing data to pass through; when high, the buffer is disabled, effectively isolating the bus.

5. Wide Supply Voltage Range: The TCA9509 operates over a wide supply voltage range, typically from 1.65V to 5.5V, making it versatile for various applications.

6. Low Power Consumption: The device is designed for low power operation, which is essential for battery-powered applications. It features a low quiescent current, ensuring minimal power draw when idle.

7. Thermal and Electrical Protection: The TCA9509 includes built-in protection features to safeguard against overvoltage and thermal issues, enhancing reliability in demanding environments.

Package Information:

• Type: The TCA9509DGKR is available in a small, surface-mount package (TSSOP-8), which is suitable for space-constrained designs.
• Dimensions: The TSSOP-8 package typically measures around 3 mm x 4.4 mm, with a height of approximately 1 mm.

Applications:

The TCA9509 is ideal for various applications, including:

• Mixed-Voltage Systems: Enabling communication between devices operating at different voltage levels.
• I2C Bus Expansion: Allowing multiple I2C devices to be connected without signal degradation.
• Sensor Interfaces: Facilitating communication between low-voltage sensors and higher-voltage microcontrollers or processors.
• Consumer Electronics: Used in devices such as smartphones, tablets, and other portable electronics where different voltage levels are common.

In summary, the TCA9509DGKR from Texas Instruments is a versatile and efficient solution for I2C bus buffering and level shifting, making it a valuable component in modern electronic designs.