This document is the specification for the Aker Quartz Crystal Unit HC-49/U-S-SMD - 4 Pad product. The product's frequency is 3.579545 MHz and can withstand temperatures of -40 to +85 º C, with storage temperatures of -55 to +125.
The AKER CA4-3.579545-18-3050-X is a HC‑49/U‑S‑SMD quartz crystal designed for precise frequency applications. It operates at a nominal frequency of 3.579545 MHz with a tolerance of ±30 ppm at 25 °C and a stability of ±50 ppm over temperature.
The device is rated for an extended operating temperature range of –40 °C to +85 °C, with storage limits from –55 °C to +125 °C. Electrical characteristics include a load capacitance of 18 pF, ESR up to 200 Ω, and a drive level between 100 µW (typ) and 500 µW (max). Mechanical dimensions are provided for the HC‑49/U package.
| Nominal Frequency | 3.579545 MHz |
|---|---|
| Frequency Tolerance at 25 °C | ±30 ppm |
| Frequency Stability over Temperature | ±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) | 200 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 3.579545 MHz.
It operates from –40 °C to +85 °C (extended range).
The load capacitance is 18 pF.