The **K1602TEW-R** is a specific surface-mount (SMD) quartz crystal oscillator. These components are critical in electronics for providing a stable clock signal to microprocessors, microcontrollers, and digital circuits. --- ### 1. Technical Specifications The "K1602" series is typically manufactured by companies like **Kyocera** (now often integrated into larger product lines). Below are the general technical characteristics: | Parameter | Typical Value | | :--- | :--- | | **Component Type** | Crystal Clock Oscillator (SPXO) | | **Package Size** | 7.0 x 5.0 mm (Standard SMD) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage ($V_{cc}$)** | 3.3V or 5.0V (Variant dependent) | | **Frequency Stability** | ±25ppm, ±50ppm, or ±100ppm | | **Operating Temperature** | -10°C to +70°C or -40°C to +85°C | | **Mounting Type** | Surface Mount (SMT) | --- ### 2. Internal Electronic Parts The K1602TEW-R is an **active** oscillator, meaning it contains more than just a piece of quartz. It consists of three primary internal stages: 1. **Quartz Crystal Blank:** A precision-cut piece of synthetic quartz that vibrates at a specific frequency when a voltage is applied (Piezoelectric effect). 2. **Oscillation IC:** A small integrated circuit that maintains the vibration and amplifies the signal. 3. **Output Buffer:** A circuit that shapes the signal into a clean square wave (CMOS) and ensures it can drive the "load" of the connected chips. --- ### 3. Pin Configuration Standard 7050 (7.0 x 5.0 mm) oscillators like the K1602 usually follow a 4-pin layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | INH / NC | Standby function (Tristate) or No Connection | | **2** | GND | Ground connection | | **3** | Output | The generated clock signal (Square wave) | | **4** | $V_{cc}$ | Positive power supply input | --- ### 4. Part Number Breakdown (Generic) While suffixes can vary by manufacturer, the "R" usually indicates the packaging method: * **K1602:** Series identifier (7050 size). * **TEW:** Frequency and stability code. * **-R:** Tape & Reel (indicates the part is supplied on a reel for automated pick-and-place machines). --- ### 5. Application Usage The K1602TEW-R is commonly found in: * **Networking Gear:** Routers, switches, and modems. * **Industrial PC:** Motherboards and embedded controllers. * **Consumer Electronics:** High-end audio/video equipment requiring stable timing.