The **PL602-03OC-R** is a high-performance, low-phase noise clock generator integrated circuit (IC) developed by Microchip Technology (formerly PhaseLink). It is specifically designed to produce high-frequency differential outputs from lower-frequency crystal or clock inputs. --- ## 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Input Frequency Range** | 12MHz to 25MHz | | **Output Frequency Range** | 480MHz to 640MHz | | **Supply Voltage (VDD)** | 2.25V to 3.63V | | **Package Type** | 6-Pin SOT23 (Small Outline Transistor) | | **Operating Temperature** | 0°C to 70°C (Commercial Grade) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ## 2. Main Functional Components The internal architecture of the PL602-03OC-R consists of several critical electronic stages: ### A. Crystal Oscillator (XO) Input The IC includes a built-in oscillator circuit designed to work with an external fundamental parallel resonant crystal. This serves as the stable reference frequency. ### B. Phase-Locked Loop (PLL) This is the "heart" of the chip. It utilizes a high-frequency Voltage Controlled Oscillator (VCO). The PLL multiplies the input crystal frequency (e.g., 25MHz) to the target high-frequency output (e.g., 600MHz) with extremely high precision. ### C. LVPECL Output Driver The "OC" in the part number signifies its output characteristics. It provides a differential **LVPECL** output. This is ideal for high-speed data transmission because: * It has excellent noise immunity. * It supports high-speed switching with minimal jitter. * It requires specific termination (usually 50 ohms to $V_{DD} - 2V$). --- ## 3. Pin Configuration (6-Pin SOT23) | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | XIN | Crystal Input or Reference Clock Input | | 2 | GND | Ground Connection | | 3 | XOUT | Crystal Output (Leave floating if using external clock) | | 4 | OUT+ | Non-inverted Differential PECL Output | | 5 | OUT- | Inverted Differential PECL Output | | 6 | VDD | Power Supply (3.3V typical) | --- ## 4. Typical Applications Because of its low jitter and high-frequency capabilities, the PL602-03OC-R is commonly found in: * **Networking Gear:** Ethernet switches and routers. * **Storage Area Networks (SAN):** Fibre Channel equipment. * **Telecommunications:** SONET/SDH infrastructure. * **Computing:** High-speed server backplanes. --- ## 5. Part Number Breakdown * **PL602-03**: The specific family and internal multiplier configuration. * **O**: Refers to the Operating Temperature (Commercial). * **C**: Refers to the Package Code (SOT23-6L). * **-R**: Indicates "Tape and Reel" packaging for automated assembly.