This is a specification document for CA4-24.576-18-3050-X quartz crystal unit, produced by Aker company.
The document provides the electrical and mechanical specifications for Aker's HC-49/U-S-SMD 4‑pad quartz crystal unit.
It lists the nominal frequency, tolerance, temperature ranges, load capacitance, ESR, drive level, solder‑reflow characteristics and confirms RoHS compliance. This manual is written in Chinese.
| Nominal Frequency | 24.576 MHz |
|---|---|
| Frequency Tolerance at 25°C | ±30 PPM |
| Max Frequency Stability over Temperature Range | ±50 |
| Operating Temperature Range (Extended) | -40 to +85 º C |
| Storage Temperature Range | -55 to +125 |
| Aging per Year | ±3 PPM |
| Max Load Capacitance | 18 pF |
| Shunt Capacitance (Maximum) | 7 |
| Equivalent Series Resistance (ESR) | 40 Ohms |
| Max Drive Level | 100‑500 µW |
| Solder Reflow Characteristics | +260 °C for 10 s |
| RoHS Compliance | Pb‑free |
The nominal frequency is 24.576 MHz.
It operates from –40 °C to +85 °C (extended range).
Yes, it is RoHS compliant and lead‑free.
The maximum load capacitance is 18 pF.