The **MHO+57TCD-R** is a high-precision, high-frequency **TCXO (Temperature Compensated Crystal Oscillator)** manufactured by MtronPTI. These components are designed for applications requiring extreme stability over a wide temperature range, typically used in telecommunications and aerospace. --- ### 1. Key Technical Specifications The part number follows a specific nomenclature that defines its electrical characteristics: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Type** | TCXO | Temperature Compensated Crystal Oscillator | | **Frequency Range** | 1.0 MHz to 160 MHz | Specific frequency depends on the full SKU | | **Output Type** | HCMOS / ACMOS | High-speed CMOS logic compatibility | | **Supply Voltage** | 5.0V (Standard) | Standard "5" designation in the series | | **Stability** | ±1.0 ppm to ±5.0 ppm | Stability across the operating temperature range | | **Package Size** | 14-pin DIP | Full-size metal "DIP" plug-in package | | **Feature Code** | "R" | Usually signifies RoHS Compliance | --- ### 2. Physical and Pin Configuration The MHO series uses the industry-standard 4-pin or 14-pin metal DIP (Dual In-line Package) footprint. Even in a 14-pin footprint, usually only 4 pins are active: * **Pin 1:** N/C or Voltage Control (if it were a VCTCXO) * **Pin 7:** Case Ground * **Pin 8:** Output (Clock Signal) * **Pin 14:** Supply Voltage (Vcc) --- ### 3. Core Electronic Components Inside As a TCXO, the MHO+57TCD-R is an integrated assembly consisting of several electronic subsystems: 1. **Quartz Crystal Resonator:** The primary frequency source, cut at a specific angle (usually AT-cut). 2. **Compensation Network:** A thermistor-resistor-capacitor network that senses temperature changes and adjusts the load capacitance to keep the crystal on frequency. 3. **Oscillator IC:** An integrated circuit that provides the gain needed to maintain oscillation. 4. **Voltage Regulator:** Internal regulation to prevent "pushing" (frequency shifts caused by supply voltage fluctuations). 5. **Output Buffer:** Ensures the signal is strong enough to drive the load without affecting the oscillator's stability. --- ### 4. Typical Applications Because of its high stability and rugged metal housing, this part is commonly found in: * **Network Base Stations:** For timing synchronization. * **Test and Measurement:** Used as a reference clock for counters and synthesizers. * **Military Communications:** Where thermal drift must be minimized. * **Avionics:** Systems operating in unconditioned environments. ---