SNAS705D January 2017 – February 2024 CDCE813-Q1
PRODUCTION DATA
When the CDCE813-Q1 device can be used as a crystal buffer, the crystal oscillator start-up dominates the start-up time compared to the internal PLL lock time. Figure 8-4 shows the oscillator start-up sequence for a 27-MHz crystal input with an 8-pF load. The start-up time for the crystal is on the order of approximately 250 µs compared to approximately 10 µs of lock time. In general, lock time is an order of magnitude less compared to the crystal start-up time.