The part number **M2AS1-6121-R2/Q** refers to a high-performance, small-form-factor **Oscillator**, typically used in telecommunications and high-speed data networking. It is manufactured by **Mercury Electronic**, a specialist in frequency control components. ### 1. General Specifications This specific series is characterized by high frequency stability and low phase jitter, making it suitable for modern communication protocols. | Parameter | Specification (Typical for this Series) | | :--- | :--- | | **Component Type** | Quartz Crystal Oscillator (SPXO/Differential) | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Frequency Range** | Typically fixed (e.g., 100MHz, 125MHz, or 156.25MHz) | | **Supply Voltage** | 2.5V or 3.3V (indicated by "2" or "3") | | **Package Size** | 7.0 x 5.0 mm or 5.0 x 3.2 mm SMD | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | --- ### 2. Part Number Breakdown While manufacturer coding can vary, the suffix and prefix codes usually indicate the following hardware characteristics: * **M2AS**: Represents the product series (Multi-mode or specific differential output series). * **6121**: Refers to the internal circuit design, frequency stability (e.g., ±25ppm or ±50ppm), and voltage. * **R2**: Usually indicates the **Tape & Reel** packaging specification for automated SMT assembly. * **/Q**: Often denotes **AEC-Q200** compliance (Automotive grade) or specific quality screening for high-reliability applications. --- ### 3. Key Electronic Features * **Differential Signaling (LVPECL):** This part uses differential outputs to provide excellent noise immunity. In high-speed circuits, this prevents electromagnetic interference (EMI) from corrupting the clock signal. * **Low Phase Jitter:** Crucial for SerDes (Serializer/Deserializer) applications, ensuring low bit-error rates (BER) in data transmission. * **Tri-state Function:** Includes an Enable/Disable pin (Pin 1) that allows the output to be turned off for power saving or system testing without powering down the entire device. --- ### 4. Typical Applications The M2AS1 series is commonly integrated into the following hardware: * **Networking:** 10G/40G/100G Ethernet switches and routers. * **Storage:** Fiber Channel and SAN (Storage Area Network) equipment. * **Computing:** High-speed PCI Express (PCIe) clocking. * **Industrial:** High-reliability sensors and FPGA clocking sources. ---