SNLS697A April 2021 – February 2023 TDES954
PRODUCTION DATA
A 25-MHz, parallel, 18-pF load crystal resonator should be used if a crystal source is desired. #T4585536-3 shows a typical connection for a crystal resonator circuit. The load capacitor values will vary with the crystal vendors; check with the vendor for the recommended loads.
As a starting point for evaluating an oscillator circuit, if the requirements for the crystal are not known, CL1 and CL2 should be set at 27 pF and R1 should be set at 0 Ω. Specification for 25-MHz crystal are listed in Table 7-3.
PARAMETER | TEST CONDITIONS | MIN | TYP | MAX | UNIT | |
---|---|---|---|---|---|---|
REFERENCE CLOCK | ||||||
Frequency | 25 | MHz | ||||
Frequency Tolerance and Stability | Across operational temperature and aging | ±100 | ppm |