The **MHO+12TCD-R** is a specific model of a **Quartz Crystal Oscillator**, typically used as a high-precision clock source in telecommunications, networking, and industrial computing equipment. It is manufactured by companies like MtronPTI. --- ### 1. Technical Specifications The part number "MHO+12TCD-R" contains encoded data regarding its performance characteristics. | Parameter | Specification | Description | | :--- | :--- | :--- | | **Frequency** | 12.000 MHz (typically) | The primary output clock frequency. | | **Package Type** | 14-pin DIP (Full Size) | A through-hole metal canister. | | **Output Type** | HCMOS / TTL | Compatible with high-speed CMOS and TTL logic levels. | | **Supply Voltage** | 5.0V DC | Standard operating voltage for legacy and industrial systems. | | **Stability** | ±100 ppm (Standard) | Frequency deviation over temperature. | | **RoHS Status** | Lead-Free (R) | The "R" suffix indicates RoHS compliance. | --- ### 2. Physical Construction The device is housed in a **hermetically sealed metal package**. This construction is critical for: * **EMI Shielding:** The metal case is usually grounded to reduce electromagnetic interference. * **Environmental Protection:** Protects the internal quartz crystal from moisture and atmospheric pressure changes. * **Durability:** The "MHO" series is known for being rugged and suitable for long-lifecycle industrial products. --- ### 3. Pin Configuration (Internal Mapping) Though it occupies a 14-pin footprint, most oscillators of this type only use four functional pins: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | N/C or Tri-State | Often used for output enable/disable functions. | | **7** | GND | Ground connection (Case ground). | | **8** | Output | The generated square wave clock signal. | | **14** | Vcc | +5.0V Power supply. | --- ### 4. Common Applications * **Legacy Computing:** Providing the master clock for 8-bit or 16-bit microprocessors. * **Telecommunications:** Synchronizing data transmission in line cards. * **Test Equipment:** Used in oscilloscopes and signal generators where a stable frequency reference is required. ---