The **575R20HD** typically refers to a high-performance **Crystal Oscillator** or a specific **Film Resistor** series, depending on the manufacturer (most commonly associated with **CTS Electronic Components**). Below is a detailed breakdown of the electronic specifications and characteristics based on the standard industry nomenclature for this part number. --- ## 1. Component Overview The "575" series by CTS generally refers to a **Voltage Controlled Crystal Oscillator (VCXO)**. These parts are designed for high-frequency applications requiring precise timing and low phase noise. ### Key Specifications Table | Feature | Typical Specification | | :--- | :--- | | **Component Type** | Voltage Controlled Crystal Oscillator (VCXO) | | **Output Type** | HCMOS / TTL | | **Operating Voltage** | 3.3V (Standard for 'R' designation) | | **Frequency Stability** | ±20ppm (Standard for '20' designation) | | **Package Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | --- ## 2. Part Number Breakdown Understanding the alphanumeric code helps identify the specific capabilities of the unit: * **575**: The series model (VCXO, 7.0mm x 5.0mm package size). * **R**: Represents the operating voltage (usually **3.3V DC**). * **20**: Represents the frequency stability (±20 parts per million). * **HD**: Often refers to the operating temperature range and duty cycle (H = Industrial Temp, D = 45/55% Duty Cycle). --- ## 3. Technical Features ### A. Low Phase Jitter These components are engineered to minimize timing errors. This is critical for high-speed data transmission where "jitter" can cause data corruption. ### B. Pullability As a VCXO, the output frequency can be slightly adjusted (pulled) by varying the input control voltage. This allows the system to synchronize with external clock signals. ### C. Tri-State Function The "HD" variants often include an **Enable/Disable** function (Pin 1 or 2), allowing the output to be placed in a high-impedance state to save power or perform system testing. --- ## 4. Common Applications Due to its precision, the 575R20HD is found in: * **Telecommunications:** Base stations, small cells, and optical networking. * **Broadband Access:** Modems and routers requiring stable clocking. * **Test & Measurement:** Oscilloscopes and signal generators. * **Phase-Locked Loops (PLL):** Used as the local oscillator for frequency synthesis. --- ## 5. Typical Pin Configuration (7x5mm SMD) | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | Vc | Control Voltage (Adjusts Frequency) | | **2** | E/D | Enable/Disable (Tri-State) | | **3** | GND | Circuit Ground | | **4** | Output | Frequency Signal Output | | **5** | NC | No Connection | | **6** | Vcc | Supply Voltage (+3.3V) | ---