CDCV855IPWR datasheet by Texas Instruments

CDCV855IPWR Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CDCV855IPWR?
  The recommended power-up sequence is to apply VCC first, followed by VDD, and then the input clock signal. This ensures proper initialization and prevents potential latch-up conditions.
• How do I ensure the CDCV855IPWR is in a known state after power-up?
  You can use the POR (Power-On Reset) pin to reset the device after power-up. The POR pin is active-low, so connect it to a pull-up resistor and a capacitor to ground to create a power-on reset circuit.
• What is the maximum clock frequency supported by the CDCV855IPWR?
  The CDCV855IPWR supports clock frequencies up to 250 MHz. However, the actual maximum frequency may vary depending on the specific application, PCB layout, and signal integrity.
• How do I handle clock domain crossing (CDC) with the CDCV855IPWR?
  The CDCV855IPWR is designed to handle CDC issues internally. However, it's essential to follow proper CDC design practices, such as using synchronizers or FIFOs, to ensure data integrity and prevent metastability issues.
• What is the recommended termination scheme for the CDCV855IPWR's output signals?
  The CDCV855IPWR's output signals typically require a 50-ohm termination to ensure signal integrity and minimize reflections. You can use a series resistor and a parallel capacitor to ground for AC-coupled termination or a series resistor for DC-coupled termination.