SMD tuning fork crystal provides a 32.768 kHz nominal frequency in the ECX-306X molded surface-mount package. The crystal uses a 12.5 pF standard load capacitance and supports a maximum drive level of 1 µW. Calibration tolerance is ±20 ppm at 25 °C, with 50 kΩ maximum equivalent series resistance and 50,000 minimum Q factor. The standard operating temperature range is -10 °C to 60 °C, with a maximum operating range of -40 °C to 85 °C and storage from -55 °C to 125 °C. Tape-and-reel packaging is specified at 3,000 pieces, and the datasheet identifies RoHS compliance with a high-temperature solder exemption.
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| Product Type | SMD tuning fork crystal |
| Nominal Frequency | 32.768kHz |
| Load Capacitance | 12.5 standard, 6.0 optionalpF |
| Drive Level | 1 maxµW |
| Calibration Tolerance | ±20 at 25 °Cppm |
| Equivalent Series Resistance | 50 maxkΩ |
| Temperature Coefficient | -0.040 maxppm/°C² |
| Operating Temperature Range | -10 to 60°C |
| Maximum Operating Temperature Range | -40 to 85°C |
| Q Factor | 50,000 min |
| Turnover Temperature | +25 ±5°C |
| Storage Temperature Range | -55 to 125°C |
| Insulation Resistance | 500 min at DC 100 VMΩ |
| Shunt Capacitance | 1.35 typicalpF |
| Motional Capacitance | 0.003 typicalpF |
| Aging, First Year | ±3 max at +25 °Cppm |
| Package Length | 8.0 maxmm |
| Package Width | 5.5mm |
| RoHS | Compliant with exemption for high temperature solder |
Download the complete datasheet for ECS ECS-.327-12.5-17X to view detailed technical specifications.
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