The **M7S12FBJ-R** is a high-performance **Crystal Oscillator** (specifically a SPXO - Simple Packaged Crystal Oscillator) manufactured by **TXC Corporation**. It belongs to the M7S series, which is designed for high-frequency stability and low jitter in compact electronic assemblies. ### 1. Key Technical Specifications | Parameter | Value/Range | | :--- | :--- | | **Output Type** | CMOS | | **Supply Voltage (Vdd)** | 2.5V or 3.3V (Standard) | | **Frequency Range** | Typically 1 MHz to 170 MHz | | **Frequency Stability** | ±25 ppm to ±50 ppm | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Package Size** | 7.0 x 5.0 x 1.3 mm (6 Pads) | | **RoHS Status** | Compliant (Lead-Free) | --- ### 2. Physical Characteristics and Pinout The device is housed in a ceramic SMD (Surface Mount Device) package, which provides excellent hermetic sealing for reliability. * **Pad 1:** Enable/Disable (E/D) or No Connection. * **Pad 2:** No Connection. * **Pad 3:** Ground (GND). * **Pad 4:** Output (Frequency signal). * **Pad 5:** Complementary Output (if differential) or No Connection. * **Pad 6:** Supply Voltage (Vdd). --- ### 3. Core Functional Features * **Low Phase Jitter:** Optimized for high-speed data transmission and clocking sensitive microprocessors. * **Tri-state Function:** Includes an Enable/Disable function on Pad 1, allowing the output to go into a high-impedance state to save power when the clock is not needed. * **CMOS Output:** Provides a rail-to-rail square wave output, making it directly compatible with most modern FPGAs, MCUs, and DSPs. --- ### 4. Common Applications Due to its stability and frequency range, the M7S12FBJ-R is frequently found in: 1. **Networking:** Fiber Channel, Gigabit Ethernet, and Switches. 2. **Computing:** Storage Area Networks (SAN) and high-speed Servers. 3. **Industrial:** Precision measurement equipment and automated control systems. --- ### 5. Part Number Breakdown (Example) The suffix **-R** usually denotes **Tape & Reel** packaging, indicating the part is ready for automated SMT assembly lines. ```text M7S - Series Code (7.0x5.0mm CMOS) 12 - Specific internal design/frequency code F - Frequency Stability (e.g., ±50ppm) B - Operating Temp Range (-40 to +85C) J - Voltage (e.g., 3.3V) R - Packaging (Tape & Reel) ```