This specification sheet details the characteristics and specifications of the 14.7456 MHz Quartz Crystal Unit HC-49/U-Through Hole
The HC-49/U is a through‑hole quartz crystal unit offered by AKER for precision timing applications. It operates at a nominal frequency of 14.7456 MHz and is designed for lead‑free (Pb‑free) manufacturing.
This one‑page datasheet lists the key electrical parameters such as frequency tolerance, stability, load capacitance, ESR, and drive level, as well as mechanical dimensions, temperature ranges, and solder reflow characteristics.
| Nominal Frequency | 14.7456 MHz |
|---|---|
| Mode of Oscillation | Fundamental |
| Frequency Tolerance at 25°C | +30 ppm |
| Frequency Stability over Temperature Range | +50 ppm Max |
| Operating Temperature Range (Extended) | -40 °C to +85 °C |
| Storage Temperature Range | -55 °C to +125 °C |
| Aging per Year | +3 ppm Max |
| Load Capacitance | 18 pF |
| Shunt Capacitance (Maximum) | 7 pF |
| Equivalent Series Resistance (ESR) | 25 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 14.7456 MHz.
It operates from –40 °C to +85 °C (extended range).
The load capacitance is specified as 18 pF.
The maximum equivalent series resistance is 25 Ω.