CDCE937PW datasheet by Texas Instruments

CDCE937PW Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the CDCE937PW?
  The recommended power-up sequence is to apply VCC first, followed by VDD, and then the input clock signal. This ensures proper device initialization and prevents potential latch-up conditions.
• How do I configure the CDCE937PW for a specific output frequency?
  The CDCE937PW can be configured using the SPI interface to set the output frequency. The device has a 7-bit frequency select register (FSR) that allows you to select from 128 possible frequencies. Consult the datasheet for the FSR code table and calculation formula.
• What is the maximum input clock frequency that the CDCE937PW can handle?
  The CDCE937PW can handle input clock frequencies up to 200 MHz. However, the maximum input frequency may be limited by the specific application and board layout. It's essential to ensure that the input clock signal meets the device's input requirements and is properly terminated.
• Can I use the CDCE937PW as a clock multiplier?
  Yes, the CDCE937PW can be used as a clock multiplier. The device has a built-in PLL that allows you to multiply the input clock frequency by a factor of 1 to 128. This makes it suitable for applications that require a higher clock frequency than the input signal.
• How do I ensure proper thermal management for the CDCE937PW?
  Proper thermal management is crucial for the CDCE937PW. Ensure that the device is mounted on a suitable heat sink, and the thermal pad is connected to a solid ground plane. The device's thermal resistance (RθJA) is 45°C/W, and the maximum junction temperature is 150°C.