## Technical Overview of the PLL602-35OC-R The **PLL602-35OC-R** is a high-performance, low-power integrated circuit (IC) designed for clock generation. It is specifically a **Low Phase Noise VCXO (Voltage Controlled Crystal Oscillator)** designed to pull a fundamental frequency crystal over a wide range. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Manufacturer** | Microchip Technology (formerly PhaseLink) | | **Part Family** | PLL602 Series | | **Output Type** | CMOS | | **Input Frequency** | 10MHz to 27MHz (Fundamental Crystal) | | **Output Frequency** | Up to 27MHz (1:1 with input) | | **Supply Voltage (Vdd)** | 2.5V to 3.3V | | **Package Type** | SOP-8 (8-pin Small Outline Package) | | **Operating Temperature** | 0°C to 70°C (Commercial Grade) | | **Pulling Range** | ±200 ppm (typical) | --- ### 2. Functional Description The device is engineered to convert a standard crystal input into a stable, low-jitter clock output. Its primary function involves: * **VCXO Functionality:** It allows the output frequency to be adjusted (pulled) by applying a control voltage ($V_{c}$) to Pin 1. * **Phase Noise Reduction:** It uses advanced analog circuitry to ensure that the output signal has minimal timing deviations (jitter), which is critical for high-speed data transmission. * **Wide Pull Range:** Unlike standard oscillators, this IC can adjust the frequency significantly to synchronize with external signals. --- ### 3. Pin Configuration (SOP-8) | Pin # | Symbol | Description | | :--- | :--- | :--- | | 1 | **VC** | Voltage Control input for frequency pulling. | | 2 | **XIN** | Crystal interface/Input. | | 3 | **GND** | Ground connection. | | 4 | **XOUT** | Crystal interface. | | 5 | **CLK** | CMOS Clock Output. | | 6 | **VDD** | Power Supply (2.5V or 3.3V). | | 7 | **NC** | No Connection. | | 8 | **OE** | Output Enable (High = Enable, Low = High Impedance). | --- ### 4. Typical Applications This component is commonly found in electronics that require precise timing synchronization, such as: 1. **Set-Top Boxes:** Synchronizing audio/video streams. 2. **ADSL/VDSL Modems:** Data clock recovery. 3. **Digital Video:** Maintaining frame rates in broadcast equipment. 4. **Network Switches:** Ensuring data packets are timed correctly across ports. --- ### 5. Part Number Breakdown * **PLL602-35:** The base functional series (VCXO). * **O:** Package code for SOP (Small Outline Package). * **C:** Commercial temperature range (0°C to 70°C). * **R:** Tape and Reel packaging (for automated PCB assembly).