Description
The Mercury 32.768 kHz Tuning Fork Crystal is the industry-standard “wristwatch crystal,” precision-engineered for low-power timekeeping. Operating at 32.768 kHz (exactly $2^{15}$ Hz), it provides a perfect base frequency that can be divided by a series of binary dividers to produce a precise 1 Hz (1 pulse per second) signal, which is the foundational clock heartbeat for all digital clocks and Real-Time Clock (RTC) modules.
Housed in a miniature 3.2 x 1.5 x 0.8 mm ceramic SMD package, this crystal is designed for high shock and vibration resistance, making it ideal for portable, battery-operated devices. It features a parabolic (quadratic) temperature stability curve, optimized with a turnover temperature of 25°C ±5°C, ensuring maximum accuracy at typical operating environments.
Features
- Precision Timing: Standard 32.768 kHz frequency for easy division to 1 Hz.
- Miniature Footprint: 3.2 x 1.5 x 0.8 mm ceramic package for compact designs.
- High Stability: Quadratic temperature curve with a 25°C turnover point.
- Robust Design: Excellent shock and vibration resistance; low aging rate of ±3 ppm/year.
- Compliance: 100% RoHS compliant and lead-free.
Applications
- Real-Time Clock (RTC) modules
- Wearable electronics (smartwatches, fitness trackers)
- Battery-operated IoT and handheld devices
- Industrial time-stamping hardware
Package Includes
- 1 x Mercury 32.768 kHz 12.5 pF Tuning Fork Quartz Crystal
Specifications
| Parameter | Specification |
|---|---|
| Frequency | 32.768 kHz |
| Crystal Cut | X-CUT |
| Load Capacitance | 12.5 pF |
| Frequency Tolerance | ±20 ppm |
| Turnover Temperature | 25°C ±5°C |
| Aging | ±3 ppm / year max |
| Drive Level | 0.1 µW (typ) / 1.0 µW (max) |
| Shunt Capacitance | 1.6 pF (typ) |
