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- Crystal Unit
Excellent aging characteristics.
RoHS compliant and lead free.
| Type | STF15 | STF26 | STF38 |
| Freq. range | 30 ~ 200KHz | 30 ~ 200KHz | 32.768KHz |
| Frequency tolerance （at 25°C） | -/+20ppm | ||
| Operating temperature | -20 ~ +85°C | ||
| Equivalent series resistance | See table No.1 | ||
|
Temperature characteristics -Turnover temperature -Parabolic curvature constant |
25°C-+5°C -0.045x10 -6 /°C 2 Max. |
||
| Drive level | 1.0uW Max. | ||
| Shunt capacitance | 5.0pF Max. | 2.0pF Max. | 2.0pF Max. |
| Load capacitance | 12.5pF (standard) | ||
| Aging | -/+5ppm/year | ||
| Type | Frequency | ESR |
| STF38 | 32.768KHz | 35K ohms Max. |
| STF26 | 32.768KHz | 50K ohms Max. |
| STF15 | 32.768KHz | 60K ohms Max. |
| Type | A | B | C | D | E |
| STF38 | 8.2 | 3.1 | 0.8 | 10 | 0.35 |
| STF26 | 6.2 | 2.1 | 0.7 | 7.5 | 0.25 |
| STF15 | 5 | 1.4 | 0.45 | 5 | 0.22 |
