Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to route the I2C lines as close to the device as possible, with a minimum of vias and 90-degree turns. Additionally, decoupling capacitors should be placed close to the device's power pins.
The TCA9617BDGKR has an internal pull-up resistor, but external pull-up resistors may be required depending on the bus capacitance. TI recommends calculating the total bus capacitance and selecting pull-up resistors accordingly, following the I2C bus specification guidelines.
The maximum cable length for the I2C bus depends on the bus speed and capacitance. As a general guideline, TI recommends keeping the cable length below 1 meter for standard-mode I2C (100 kHz) and below 0.3 meters for fast-mode I2C (400 kHz).
The TCA9617BDGKR has built-in fault detection capabilities, such as bus stuck detection and clock stretching. To implement fault recovery, TI recommends using a microcontroller to monitor the I2C bus and detect faults, and then implementing a recovery mechanism, such as resetting the device or re-initializing the bus.
TI recommends powering up the TCA9617BDGKR in the following sequence: VCC, then VIO, and finally the I2C bus. This ensures that the device is properly initialized and configured before the I2C bus is activated.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
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