This document describes the specifications and characteristics of the Quartz Crystal Unit HC-49/U-S-SMD product manufactured by AKER, including frequency, temperature range, tolerance, stability, etc.
The AKER HC-49/U-S-SMD quartz crystal unit is a lead‑free, RoHS‑compliant component designed for precise frequency control in electronic circuits. It is supplied in a surface‑mount package and meets the standard HC‑49/U form factor.
The datasheet provides detailed electrical parameters such as a nominal 32 MHz frequency, ±30 ppm tolerance at 25 °C, and a drive level up to 500 µW, as well as mechanical specifications including package dimensions and solder reflow limits. Temperature operating limits, storage ranges, and aging characteristics are also listed.
| Nominal Frequency | 32.000 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 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) | 40 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 32.000 MHz.
It operates from –40 °C to +85 °C.
The drive level can be up to 500 µW, with a typical value of 100 µW.
Yes, the crystal is RoHS compliant and lead‑free.