TCA6408PWR datasheet by Texas Instruments

TCA6408PWR Frequently Asked Questions (FAQs)

• What is the recommended layout and routing for the TCA6408PWR?
  Texas Instruments provides a recommended layout and routing guide in the TCA6408PWR Evaluation Module User's Guide (SLAU445). It's essential to follow this guide to ensure proper operation and minimize noise and signal integrity issues.
• How do I handle the power sequencing for the TCA6408PWR?
  The TCA6408PWR requires a specific power sequencing to ensure proper operation. The VCC pin should be powered up first, followed by the VDD pin. The datasheet provides a detailed power sequencing diagram (Figure 10) that should be followed.
• What is the maximum capacitive load that the TCA6408PWR can drive?
  The TCA6408PWR can drive up to 50 pF of capacitive load on each output pin. Exceeding this limit may cause signal integrity issues or even damage the device.
• How do I configure the TCA6408PWR for I2C or SMBus operation?
  The TCA6408PWR can be configured for I2C or SMBus operation by setting the appropriate values on the A0, A1, and A2 address pins. The datasheet provides a detailed table (Table 7) that shows the address pin configurations for each mode.
• What is the maximum operating frequency of the TCA6408PWR?
  The TCA6408PWR can operate up to 400 kHz in I2C mode and up to 100 kHz in SMBus mode. However, the actual operating frequency may be limited by the system's clock speed and other factors.