This document is about CA-7.3728-18-3050-X Quartz Crystal Unit HC-49/U-S specification, including product frequency, stability, temperature range, load capacitance, parallel capacitance, equivalent series resistance, drive level and other parameters.
This datasheet provides the key electrical specifications for the AKER quartz crystal unit, including nominal frequency, tolerance, stability, temperature ranges, and drive level. It also lists mechanical dimensions and reflow characteristics relevant for PCB assembly.
The document includes part identification, ordering information, and compliance notes such as RoHS and lead‑free status. All values are presented in metric units and are suitable for designers selecting the component for timing and frequency control applications.
| Nominal Frequency | 7.3728 MHz |
|---|---|
| Frequency Tolerance at 25°C | +30 ppm |
| Frequency Stability over Temperature | +50 ppm Max |
| Operating Temperature Range (Extended) | -40 to +85 °C |
| Storage Temperature Range | -55 to +125 °C |
| Aging per Year | +3 ppm Max |
| Load Capacitance | 18 pF |
| Shunt Capacitance (Maximum) | 7 pF |
| Equivalent Series Resistance (ESR) | 80 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
| Mechanical Height | 11.35 mm Max |
The nominal frequency is 7.3728 MHz.
It operates from –40 °C to +85 °C (extended range).
The ESR is limited to 80 Ω maximum.
The crystal can withstand up to +260 °C for 10 seconds.