SNLS504G October 2015 – June 2026 DP83867CS , DP83867E , DP83867IS
PRODUCTION DATA
If a crystal source is desired, use a 25MHz, parallel, 18pF load crystal resonator. Table 8-26 shows a typical connection for a crystal resonator circuit. The load capacitor values vary with the crystal vendors; check with the vendor for the recommended loads.
Figure 9-5 Crystal Oscillator CircuitAs a starting point for evaluating an oscillator circuit, if the requirements for the crystal are not known, set CL1 and CL2 at 27pF, and set R1 at 0Ω.
Specification for 25MHz crystal are listed in Table 9-3.
| PARAMETER | TEST CONDITION | MIN | TYP | MAX | UNIT |
|---|---|---|---|---|---|
| Frequency | 25 | MHz | |||
| Frequency Tolerance | Operational Temperature | ±50 | ppm | ||
| Frequency Stability | 1 year aging | ±50 | ppm |