CDC2351DB datasheet by Texas Instruments

CDC2351DB Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CDC2351DB?
  The recommended power-up sequence is to apply VCC first, followed by VDD, and then the clock signal. This ensures proper initialization and prevents latch-up.
• How do I handle the clock signal when using the CDC2351DB in a PLL configuration?
  When using the CDC2351DB in a PLL configuration, it's essential to ensure the clock signal is clean and stable. Use a clock buffer or a dedicated clock source to minimize jitter and noise.
• What is the maximum frequency limit for the CDC2351DB?
  The CDC2351DB can operate up to 200 MHz, but the actual frequency limit depends on the specific application, PCB layout, and clock signal quality. Ensure proper signal integrity and follow the recommended layout guidelines.
• How do I configure the CDC2351DB for a specific clock frequency?
  Configure the CDC2351DB by selecting the appropriate values for the R1 and R2 resistors, and the C1 and C2 capacitors. Use the provided equations and graphs in the datasheet to determine the correct values for your specific clock frequency.
• What is the purpose of the VDDO pin on the CDC2351DB?
  The VDDO pin is an output voltage pin that provides a regulated voltage output, which can be used to power other devices or circuits. It's essential to ensure the VDDO pin is properly decoupled and filtered to prevent noise and interference.