CDC2509BPW datasheet by Texas Instruments

CDC2509BPW Frequently Asked Questions (FAQs)

• What is the recommended clock input frequency range for the CDC2509BPW?
  The recommended clock input frequency range for the CDC2509BPW is 10 MHz to 40 MHz, although it can operate up to 50 MHz with some limitations.
• How do I ensure proper power sequencing for the CDC2509BPW?
  To ensure proper power sequencing, apply power to VCC before applying power to VCCPLL. Also, ensure that VCCPLL is powered up within 10 ms of VCC power-up.
• What is the purpose of the PLLCircuitry in the CDC2509BPW?
  The PLL (Phase-Locked Loop) circuitry in the CDC2509BPW is used to generate a stable clock output from an external clock input, allowing for frequency multiplication and jitter reduction.
• Can I use the CDC2509BPW as a clock buffer only, without using the PLL?
  Yes, the CDC2509BPW can be used as a clock buffer only, without using the PLL, by tying the PLL_BYPASS pin high. This bypasses the PLL and allows the device to operate as a simple clock buffer.
• What is the maximum output clock frequency that can be achieved with the CDC2509BPW?
  The maximum output clock frequency that can be achieved with the CDC2509BPW is 100 MHz, although this may vary depending on the specific application and clock input frequency.