ZHCSEC3D October 2015 – November 2022 DP83867CS , DP83867E , DP83867IS
PRODUCTION DATA
A 25-MHz, parallel, 18-pF load crystal resonator should be used if a crystal source is desired. Figure 9-5 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.
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 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 |