Overview
The TCA9511ADGKR is a bidirectional I2C bus buffer produced by Texas Instruments. This device is designed to extend the I2C bus by buffering both the data (SDA) and clock (SCL) lines, allowing for longer cable runs and more devices on the bus. The TCA9511ADGKR is particularly useful in applications where level shifting is required between different voltage domains, supporting both 2.5V and 5V systems. Its market positioning targets industrial automation, consumer electronics, and communication systems, offering a reliable solution for I2C bus expansion and voltage level translation.
Key Specifications
| Parameter | Value | Unit | Notes |
|---|---|---|---|
| Supply Voltage | 2.5 to 5.5 | V | Operational range |
| Operating Temperature | -40 to 85 | °C | Industrial range |
| I2C Bus Frequency | Up to 400 | kHz | Standard and Fast mode |
| Number of Channels | 1 | Single bidirectional buffer | |
| Package | VSSOP-8 | Small outline package |
Key Features
- Bidirectional buffer for I2C bus lines, SDA and SCL.
- Supports level shifting between 2.5V and 5V systems.
- Enhances I2C bus capacitance and drive capability.
- Operates at standard (100 kHz) and fast (400 kHz) I2C bus speeds.
- Low standby current, making it suitable for power-sensitive applications.
Applications
The TCA9511ADGKR is widely used in various fields including industrial automation, where it facilitates communication between sensors and controllers over long distances. In consumer electronics, it enables the integration of components operating at different voltage levels. Additionally, it is employed in communication systems to extend the reach of I2C buses in complex network architectures. Its ability to support both 2.5V and 5V systems makes it versatile for mixed-voltage environments.
Q & A
1. What is the primary function of the TCA9511ADGKR?
The primary function is to act as a bidirectional buffer for I2C bus lines, facilitating communication and level shifting between devices operating at different voltages.
2. Can the TCA9511ADGKR be used in automotive applications?
Yes, it can be used in automotive applications, provided it is within the specified operating temperature and voltage ranges.
3. Does the TCA9511ADGKR support Fast Mode I2C?
Yes, it supports Fast Mode I2C up to 400 kHz.
4. What is the operating voltage range of the TCA9511ADGKR?
It operates from 2.5V to 5.5V.
5. How does the TCA9511ADGKR handle level shifting?
It automatically adjusts the voltage levels of the I2C signals to match the voltage domain of the connected devices.
6. Is the TCA9511ADGKR suitable for battery-powered devices?
Yes, its low standby current makes it suitable for battery-powered applications.
7. What package does the TCA9511ADGKR come in?
It comes in a VSSOP-8 package.
8. Can multiple TCA9511ADGKR devices be used on the same I2C bus?
Yes, multiple devices can be used to further extend the I2C bus and support more devices.
9. What is the maximum I2C bus capacitance the TCA9511ADGKR can drive?
It can drive up to 400 pF of bus capacitance, extending the reach of the I2C bus.
10. Where can I find the datasheet for the TCA9511ADGKR?
The datasheet can be found on the Texas Instruments official website or through authorized distributors like Digi-Key and Mouser.
