CDLL5231B - Microsemi Corporation

CDLL5231B Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the CDLL5231B?
  Microsemi recommends a 4-layer PCB with a solid ground plane, and a separate power plane for the VCC and VEE pins. Additionally, keep the input and output traces as short as possible, and use 50-ohm impedance-controlled lines for the clock and data signals.
• How do I ensure the CDLL5231B is properly terminated for high-speed signals?
  Use a 50-ohm termination resistor in series with the clock and data signals, and a 100-ohm differential termination resistor for the differential pairs. Also, ensure the termination resistors are placed as close to the device pins as possible.
• What is the maximum operating temperature range for the CDLL5231B?
  The CDLL5231B is rated for operation from -40°C to +85°C, but it's recommended to operate within the -20°C to +70°C range for optimal performance and reliability.
• How do I handle the power-up and power-down sequencing for the CDLL5231B?
  Power up the VCC pin first, followed by the VEE pin. When powering down, reverse the sequence: power down the VEE pin first, followed by the VCC pin. Ensure a minimum of 100 ms delay between power-up and power-down sequences.
• What is the recommended clock signal frequency range for the CDLL5231B?
  The CDLL5231B can operate with clock frequencies from 10 MHz to 1.5 GHz, but the optimal frequency range is between 100 MHz to 500 MHz for best jitter performance.