HC51/U crystals are available from 100kHz to 10MHz. A very rugged crystal used in applications where there are higher vibrations: Aeronautical Instruments, Security and Test Equipment.
Specifications
| Frequency Range | 100kHz - 10.000 MHz |
| Frequency Tolerance at 25ºC. | ±30ppm - Standard |
| Temperature Range (Operating) | -20o to +70oC. - Standard |
| Frequency Stability | ±50ppm - Standard |
| Load Capacitance | 10pF to 100pF or Series Resonant |
| Shunt Capacitance | 7pF max. |
| Resistance | See Below |
| Aging | ±3ppm/1st year max. |
| Drive Level | 1.0mW max. |
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HC51/U |
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inches / mm |
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Equivalent Series Resistance (ESR)
| Frequency | Mode | HC51/U (Ohms) |
| 100.00-999.00 kHz | Fundamental | 1500-2000 |
| 1.000-1.499 MHz | Fundamental | 500 |
| 1.500-1.999 MHz | Fundamental | 400 |
| 2.000-2.999 MHz | Fundamental | 300 |
| 3.000-3.999 MHz | Fundamental | 150 |
| 4.000-5.999 MHz | Fundamental | 75 |
| 6.000-10.000 MHz | Fundamental | 60 |