The **M3EH75ZPD-R** is a specific technical part number, typically associated with high-performance **Crystal Oscillators** (XO), often used in telecommunications and networking hardware. Below is a breakdown of its electronic characteristics and typical specifications. --- ## 1. Component Overview This component is a **Differential Output Crystal Oscillator**. Unlike standard single-ended oscillators, differential oscillators provide two signals that are 180 degrees out of phase, which significantly reduces electromagnetic interference (EMI) and improves signal integrity in high-speed circuits. ### Key Technical Specifications | Feature | Typical Specification | | :--- | :--- | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Supply Voltage** | 3.3V (standard for M3E series) | | **Package Size** | 5.0 x 7.0 mm (6-pad SMD) | | **Frequency Stability** | ±50 ppm or ±25 ppm (depending on suffix) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Function** | Tri-state (Enable/Disable) on Pin 1 | --- ## 2. Pin Configuration The device usually follows a standard 6-pin footprint for SMD oscillators: 1. **Pin 1 (OE):** Output Enable. Allows the oscillator to be turned on or off via a logic signal. 2. **Pin 2 (NC):** No Connection. 3. **Pin 3 (GND):** Ground connection. 4. **Pin 4 (OUT):** Main clock output. 5. **Pin 5 (OUTN):** Complementary clock output (inverted). 6. **Pin 6 (Vcc):** Power supply input. --- ## 3. Circuit Role & Applications Because this part utilizes **LVPECL** logic, it is designed for environments where high-speed data transmission and low jitter (timing noise) are critical. * **Ethernet/Fiber Channel:** Providing the reference clock for 10G/40G/100G networking equipment. * **Storage Area Networks (SAN):** Used in high-speed storage controllers. * **FPGA Clocking:** Serving as a stable external clock source for high-end FPGAs and ASICs. * **RF/Wireless Infrastructure:** Base stations and backhaul equipment. --- ## 4. Part Number Breakdown (Naming Convention) While specific to the manufacturer (often *MtronPTI*), the code usually breaks down as follows: * **M3E:** Series designation (LVPECL 3.3V). * **H:** Stability/Temperature range code. * **75:** Frequency or specific internal revision code. * **ZPD:** Package/Output configuration. * **R:** RoHS compliant (Lead-free). ---