This document provides specifications for a Quartz Crystal Unit HC-49/U-S-SMD product. The product has a nominal frequency of 4.000 MHz, operates in a fundamental mode of oscillation, has a frequency tolerance of ±30 PPM at 25°C, can operate in a temperature range of -40 to +85 ºC, can be stored in a temperature range of -55 to +125 ºC, has an aging rate of ±3 PPM max per year, a load capacitance of 18 pF, an equivalent series resistance of 120 ohms max, and a maximum drive level of 500 uW.
The AKER CAA-4.000-18-3050-X quartz crystal unit is a HC‑49/U‑S‑SMD package designed for precise frequency applications. This datasheet provides the electrical and mechanical characteristics required for design and integration.
Key parameters include a nominal frequency of 4.000 MHz, frequency tolerance of +30 ppm at 25 °C, and an operating temperature range from –40 °C to +85 °C. Mechanical dimensions are specified in millimeters for PCB layout.
| Nominal Frequency | 4.000 MHz |
|---|---|
| Frequency Tolerance (25 °C) | +30 ppm |
| Frequency Stability (Temp. Range) | +50 ppm Max |
| Operating Temperature Range | -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) | 120 Ω Max |
| Drive Level | 100 µW Typ – 500 µW Max |
| Solder Reflow Characteristics | +260 °C for 10 s Max |
The nominal frequency is 4.000 MHz.
The load capacitance is 18 pF.
It operates from –40 °C to +85 °C.
The part number is CAA-4.000-18-3050‑X.