CDCU877BZQLT datasheet by Texas Instruments

CDCU877BZQLT Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CDCU877BZQLT?
  The recommended power-up sequence is to apply VCC first, followed by VCCPLL, and then the clock input. This ensures proper initialization and prevents damage to the device.
• How do I optimize the clock tree for the CDCU877BZQLT?
  To optimize the clock tree, use a low-skew clock distribution network, minimize clock loading, and ensure that the clock signal meets the recommended amplitude and frequency specifications.
• What is the maximum clock frequency supported by the CDCU877BZQLT?
  The CDCU877BZQLT supports clock frequencies up to 100 MHz, but the actual frequency limit may depend on the specific application, PCB layout, and clock signal quality.
• How do I handle clock domain crossing (CDC) in the CDCU877BZQLT?
  To handle CDC, use synchronous or asynchronous FIFOs, or implement a CDC circuit using the device's built-in features, such as the clock domain crossing circuit (CDC_CKT).
• What is the purpose of the PLL_BYPASS pin on the CDCU877BZQLT?
  The PLL_BYPASS pin allows the user to bypass the internal PLL and use an external clock source. This can be useful for debugging, testing, or when an external clock source is required.