The **W2AP-G1Y-R** is a specialized electronic component, specifically a **Surface Mount Device (SMD) Quartz Crystal Oscillator** manufactured by Seiko Epson. It is part of the **W Series** designed for precise timing applications. --- ## 1. Technical Specifications The following table highlights the core technical characteristics of the W2AP-G1Y-R: | Feature | Specification | | :--- | :--- | | **Component Type** | Quartz Crystal (SMD) | | **Nominal Frequency** | 32.768 kHz (Standard for RTC) | | **Frequency Tolerance** | ±20 ppm (at 25°C) | | **Load Capacitance** | 12.5 pF (Standard) | | **Operating Temperature** | -40°C to +85°C | | **Package Dimensions** | 2.0 x 1.2 x 0.6 mm | | **Drive Level** | 0.1 µW to 0.5 µW | --- ## 2. Key Electronic Features ### A. Tuning Fork Resonator The "W" series utilizes a **Tuning Fork** design. This is the gold standard for low-frequency oscillations (32.768 kHz), which is the exact frequency needed to count seconds (2^15 cycles) for Real-Time Clocks (RTC). ### B. Temperature Coefficient The device follows a parabolic temperature curve. While it is highly stable at room temperature (25°C), the frequency may drift slightly as it reaches the extremes of its -40°C to +85°C range. ### C. Low Power Consumption Designed for battery-operated devices, this part has a very low drive level (sub-microwatt), ensuring that the clock synchronization doesn't drain the device's main power source. --- ## 3. Common Applications The W2AP-G1Y-R is typically found in circuits where timekeeping is critical even when the main processor is in sleep mode: * **Smartphones and Tablets:** Providing the reference clock for the OS time. * **Wearables:** Fitness trackers and smartwatches requiring small form factors. * **IoT Sensors:** Low-power wide-area network (LPWAN) devices that wake up at specific intervals. * **Industrial Meters:** Smart electricity or water meters. --- ## 4. Marking and Identification The part number can be decoded as follows: * **W2:** Series identifier (Seiko Epson). * **AP:** Package type (2.0 x 1.2 mm). * **G:** Frequency tolerance code. * **1Y:** Load capacitance and temperature range identifiers. * **R:** Tape and Reel packaging.