The **M3V11T1CJ-R** is a high-performance **Voltage Controlled Crystal Oscillator (VCCO / VCXO)** manufactured by NDK (Nihon Dempa Kogyo). These components are critical for frequency control and timing in telecommunications and high-speed networking equipment. --- ## 1. Component Overview The M3V11T1CJ-R is a Surface Mount Device (SMD) designed for applications requiring high stability and low phase noise. It allows the output frequency to be adjusted (steered) slightly by applying an external control voltage. ### Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | VCXO (Voltage Controlled Crystal Oscillator) | | **Package Size** | 7.0 x 5.0 mm (6 pads) | | **Supply Voltage ($V_{cc}$)** | +3.3V DC | | **Output Type** | CMOS | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Frequency Range** | Typically 1.5 MHz to 80 MHz (Specific to ordering) | | **Frequency Pulling Range** | Min. ±90 ppm to ±100 ppm | --- ## 2. Functional Pins (Internal Architecture) The device typically utilizes a 6-pad layout. Understanding these pins is essential for PCB integration: 1. **Vcont (Control Voltage):** The input pin where a DC voltage is applied to "pull" or adjust the oscillation frequency. 2. **Enable/Disable (OE):** Allows the output to be turned on or off to save power. 3. **GND:** System ground. 4. **Output:** The CMOS clock signal. 5. **N/C:** No internal connection. 6. **Vcc:** DC Power supply (+3.3V). --- ## 3. Key Features and Advantages * **Low Jitter:** Optimized for high-speed data transmission where timing errors must be minimized. * **Wide Pulling Range:** Allows the system to synchronize with external references even if there is slight drift. * **RoHS Compliant:** Lead-free and environmentally friendly construction. * **CMOS Drive:** Compatible with most modern Microcontrollers (MCUs) and FPGAs without needing level shifters. --- ## 4. Typical Applications The M3V series is commonly found in: * **Phase-Locked Loops (PLLs):** Used to synchronize internal clocks with external data streams. * **SDH/SONET Equipment:** Networking infrastructure for telecommunications. * **Digital Video:** Maintaining sync in professional broadcast equipment. * **Wireless Base Stations:** Providing stable reference frequencies for RF transmission. ---