The document describes a quartz crystal unit, model HC-49/U-Through Hole, with a nominal frequency of 1.8432 MHz, fundamental mode of oscillation, temperature range of -40 to +85°C, load capacitance of 18 pF, equivalent series resistance of 300 ohms, and maximum drive level of 1 uW.
This data sheet provides the key electrical parameters of the AKER HC-49/U quartz crystal unit, including nominal frequency, load capacitance, ESR, and temperature stability. It also lists mechanical dimensions and marking information for proper identification and assembly.
The document includes ordering details such as the part number (C-1.8432-18-3050-X) and the Farnell order code, as well as compliance notes like RoHS and lead‑free status.
| Nominal Frequency | 1.8432 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) | 300 Ω Max |
| Drive Level | 1 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 1.8432 MHz.
The crystal requires a load capacitance of 18 pF.
The maximum equivalent series resistance is 300 Ω.
It operates from –40 °C to +85 °C (extended range).