The **MCSO2E_17** is a high-performance, high-reliability crystal oscillator specifically engineered for harsh environments, primarily in aerospace, defense, and down-hole drilling applications. It is part of the MCSO (Miniature Crystal Selection Oscillator) family, known for its extreme temperature stability and mechanical durability. --- ### 1. Technical Specifications The following table outlines the key electrical and physical parameters of the MCSO2E_17: | Parameter | Specification Details | | :--- | :--- | | **Frequency Range** | 10.0 kHz to 225.0 MHz | | **Supply Voltage (Vcc)** | 1.8V, 2.5V, or 3.3V (standard versions) | | **Output Waveform** | CMOS/TTL compatible | | **Operating Temperature** | -55°C to +125°C (Military grade) | | **Frequency Stability** | ±100 ppm (standard), tighter tolerances available | | **Package Style** | Ceramic LCC 4-pad (5.0 x 3.2 mm) | | **Start-up Time** | < 5 ms | --- ### 2. Key Electronic Components & Features #### A. Internal Quartz Crystal The heart of the device is a high-quality quartz blank, typically cut at a specific angle (AT-cut) to ensure minimal frequency drift over a wide temperature range. #### B. Integrated Circuit (IC) * **Oscillator Circuitry:** Maintains the vibration of the crystal and converts the mechanical resonance into an electrical signal. * **Buffer Stage:** Includes an output buffer to ensure the signal maintains integrity (fast rise/fall times) even when driving capacitive loads. * **Enable/Disable Function:** Pin 1 is usually reserved for E/D (Enable/Disable) or Tri-state functionality, allowing the oscillator to be powered down to save energy in battery-operated systems. #### C. Packaging and Hermeticity The unit is housed in a **Ceramic Leadless Chip Carrier (LCC)**. The gold-plated pads and kovar lid are seam-welded to create a hermetic seal. This prevents moisture or atmospheric gases from degrading the internal crystal and electronics. --- ### 3. Critical Performance Attributes 1. **Shock & Vibration Resistance:** Designed to withstand high G-forces (often up to 1500g shock), making it suitable for munitions or aerospace launch vehicles. 2. **Low Aging:** Advanced processing techniques ensure the frequency remains stable over years of operation. 3. **Low Phase Jitter:** Crucial for high-speed data communication to prevent bit errors. --- ### 4. Typical Applications * **Aerospace & Defense:** Flight control systems, telemetry, and GPS receivers. * **Industrial:** Geothermal sensors and high-temperature industrial controllers. * **Medical:** High-reliability diagnostic equipment.