The TCA9406DCUR is a specific IC (integrated circuit) model, and based on the part number, it is a product of Texas Instruments (TI). The IC is commonly used as a level translator for I2C communication, allowing bidirectional voltage translation between different logic voltage levels.
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1. Brand and Package
Brand: Texas Instruments (TI) Package Type: TCA9406DCUR is typically available in a QFN (Quad Flat No-lead) package, and more specifically in a VQFN-16 package (16 pins in total). Package details: The IC is generally supplied in a 16-pin VQFN (Very Thin Quad Flat No-lead) package, where all the pins are underneath the surface, providing a compact solution.2. Pin Function Specifications and Circuit Principle
The TCA9406DCUR pinout consists of 16 pins in total. Below is a detailed explanation of the pin functions for each pin in the 16-pin QFN package.
Pin Number Pin Name Pin Function Description 1 VCC Power supply input, typically 1.8V to 5.5V (depending on the logic voltage level of the system). 2 GND Ground connection. 3 SDA1 Serial Data Input (I2C), for communication from a master device to a slave device in the system. 4 SCL1 Serial Clock Input (I2C), for clocking communication on the I2C bus. 5 SDA2 Serial Data Output (I2C), for communication from the slave device back to the master. 6 SCL2 Serial Clock Output (I2C), for clocking data from slave to master. 7 A0 Address input for I2C communication. Typically used to set the device address. 8 A1 Address input for I2C communication. Sets another bit of the device address. 9 A2 Address input for I2C communication. 10 VCC Power supply for internal circuits. 11 GND Ground connection. 12 IO1 Bi-directional logic-level translator, can translate from low-voltage (1.8V) to higher voltages (3.3V, 5V). 13 IO2 Bi-directional logic-level translator, similar to IO1. 14 IO3 Bi-directional logic-level translator. 15 IO4 Bi-directional logic-level translator. 16 RESET Reset input pin to initialize the IC. If this pin is low, the device is reset.3. Functionality of Each Pin
VCC and GND: These provide the necessary power and ground references for the IC. SDA1, SCL1, SDA2, SCL2: These are part of the I2C interface . SDA stands for "Serial Data," and SCL stands for "Serial Clock." SDA1 and SCL1 refer to the master side, while SDA2 and SCL2 are for the slave side. Address Pins (A0, A1, A2): These are used to configure the I2C address of the device. IO Pins (IO1, IO2, IO3, IO4): These are used for bidirectional voltage-level translation on the I2C data and clock lines. RESET Pin: This is a logic level pin used to reset the device if necessary.4. Circuit Principle
The TCA9406DCUR is designed to interface different logic levels on I2C lines. For example, if your system uses a 3.3V logic controller and communicates with another device that uses 5V logic, the TCA9406DCUR can safely interface the two by translating the signals between 3.3V and 5V levels. This device uses bidirectional translation, meaning that it can automatically detect the direction of the signal flow and translate accordingly.
5. FAQ: 20 Common Questions
Q: What is the main purpose of the TCA9406DCUR? A: The TCA9406DCUR is used for bidirectional voltage-level translation for I2C communication between devices with different logic voltage levels. Q: What is the package type of TCA9406DCUR? A: It is typically available in a 16-pin QFN package. Q: How many pins does the TCA9406DCUR have? A: The TCA9406DCUR has 16 pins. Q: What voltage levels can the TCA9406DCUR support? A: It supports voltage levels from 1.8V to 5.5V. Q: How does the TCA9406DCUR handle signal direction? A: It automatically detects the direction of I2C signals and performs bidirectional translation. Q: What is the function of the RESET pin? A: The RESET pin is used to reset the device if necessary. Q: Can the TCA9406DCUR translate multiple I2C bus signals simultaneously? A: Yes, it supports bidirectional translation for both data and clock signals. Q: How does the TCA9406DCUR affect I2C communication speed? A: It supports I2C speeds up to 400 kHz. Q: What is the role of the address pins (A0, A1, A2)? A: These pins configure the I2C address of the TCA9406DCUR.Q: Can the TCA9406DCUR be used with only one I2C bus?
A: No, it is designed to handle two I2C buses with different voltage levels.Q: Does the TCA9406DCUR require external pull-up resistors?
A: Yes, pull-up resistors are needed on the SDA and SCL lines.Q: What is the recommended operating temperature range for the TCA9406DCUR?
A: The recommended operating temperature range is -40°C to 125°C.Q: How should the VCC pin be connected?
A: The VCC pin should be connected to a power source within the range of 1.8V to 5.5V.Q: Can the TCA9406DCUR handle high-speed I2C communications?
A: No, it is best used for standard-mode (100 kHz) and fast-mode (400 kHz) I2C.Q: Is the TCA9406DCUR hot-swappable?
A: Yes, the device can be safely connected or disconnected without causing damage to the circuit.Q: Does the TCA9406DCUR support I2C multi-master configurations?
A: Yes, the TCA9406DCUR supports multi-master I2C configurations.Q: How should the GND pin be connected?
A: The GND pin should be connected to the ground of the system.Q: Is there a specific order to connect the I2C pins (SDA1, SCL1, etc.)?
A: No, as long as SDA and SCL are connected properly on each side, the TCA9406DCUR handles direction and voltage translation automatically.Q: Can the TCA9406DCUR be used for SPI communication?
A: No, it is specifically designed for I2C communication.Q: Does the TCA9406DCUR require any initialization?
A: No, once powered up, the TCA9406DCUR is ready to operate without the need for initialization.