| 1. General item |
| Nominal frequency | 25.000 MHz | |
| Vibration mode | AT Fund. | |
| Operation temperature range | -40~+85 | |
| Storage temperature rang | -40~+85 | |
| Test machine | S&A 250B | |
| Drive level | 100W | |
| Load capacitance | 15 pF | |
| 2. Electrical characteristics (Condition: 253, Relatively humidity60%) |
| Frequency tolerance | 20ppm | |
| Equivalent resistance | 60 | |
| Temperature characteristics | 20ppm | |
| Shunt capacitance | 7pF | |
| Insulation resistance | 500M/10015V DC | |
| Aging characteristics | 5ppm/year | |
| 3. Reliability specification |
| 3.1 Drop characteristics | Frequency change: 5ppm, Rr as specification | Condition: height 50cm, 3 times, test after 1 hour. Equipment: S&A250B, thickness 3cm hard wood. |
| 3.2 Shake characteristics | Frequency change: 5ppm, Rr as specification | Condition: shake frequency 10~55Hz, cyc1~2 minutes, swing 1.5mm, direction x/y/z, all 30 minutes. Test after 1 hour. Equipment: S&A250B, test machine. |
| 3.3 Airproof characteristics | IR500 m | Condition: put crystal into the pressure cabin with alcohol, keep pressure 0.4-0.5mpa 10 minutes, then take out and blow for 5 minutes. Equipment: IR machine. |
| 3.4 Weld characteristics | 90% adhibit tin ok | Condition: 23553 seconds. Equipment: test machine. |
| 3.5 Humidity characteristics | Frequency change: 5ppm, Rr as specification | Condition: 402, humidity 90-95%, 250 hours. Equipment: S&A250B, test cabin. |
| 3.6 Low temperature characteristics | Frequency change: 5ppm, Rr as specification | Condition: -302, after 250 hours, put in room temperature 1 hour. Equipment: S&A250B, test machine. |
| 3.7 High temperature characteristics | Frequency change: 5ppm, Rr as specification | Condition: 852, after 250 hours, put in room temperature 1 hour. Equipment: S&A250B, test machine. |
| 3.8 Temperature cycling | Frequency change: 5ppm, Rr as specification | Equipment:S&A250B,test machine. |
| 3.9 Refluence examination | Frequency change: 10ppm, Rr as specification | Equipment: S&A250B, test machine. |
