The **WAC-A5AC-R** is a specific electronic component, typically identified as a **Crystal Oscillator** or a **Crystal Unit**. These parts are fundamental in electronics for generating precise clock signals. Below is a detailed breakdown of its electronic characteristics and technical specifications. --- ## 1. Core Functionality The WAC-A5AC-R functions as a frequency control device. It utilizes the mechanical resonance of a vibrating crystal of piezoelectric material to create an electrical signal with a very precise frequency. This is essential for: * Timing synchronization in microcontrollers. * Data transmission stability. * Clock generation for digital circuits. --- ## 2. Technical Specifications While specific data can vary slightly by manufacturer (often associated with brands like **Walsin** or specialized crystal vendors), the general specifications for this series are as follows: | Feature | Specification (Typical) | | :--- | :--- | | **Component Type** | Quartz Crystal Unit / Oscillator | | **Package Type** | SMD (Surface Mount Device) | | **Frequency Range** | Usually MHz range (Specific to sub-model) | | **Load Capacitance** | 8pF to 20pF (Standard) | | **Frequency Tolerance** | ±10 ppm to ±50 ppm | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | | **RoHS Status** | Compliant (Lead-Free) | --- ## 3. Electronic Composition The internal structure of the WAC-A5AC-R consists of several key electronic layers: ### A. The Quartz Blank The heart of the component. It is a thin slice of synthetic quartz, cut at a specific angle (usually AT-cut) to determine its temperature stability and resonant frequency. ### B. Electrodes Metal layers (usually silver or gold) are sputtered onto the quartz blank. These electrodes allow the application of an electric field to trigger the piezoelectric effect. ### C. Ceramic Base & Metal Lid * **Ceramic Base:** Provides insulation and structural integrity. * **Metal Lid:** Hermetically sealed to protect the crystal from moisture and atmospheric pressure changes, which could drift the frequency. --- ## 4. Typical Circuit Application In a standard electronic design, the WAC-A5AC-R is connected to the `XTAL_IN` and `XTAL_OUT` pins of an IC, accompanied by two load capacitors. ```cpp // Typical Schematic Representation // [IC / MCU] // | | // | +----[ WAC-A5AC-R ]----+ // | | | // +--[ C1 ]--[ GND ]--[ C2 ]+ ``` --- ## 5. Identification Code Breakdown * **WAC:** Often represents the Series or Manufacturer code. * **A5AC:** Refers to the physical dimensions (e.g., 5.0 x 3.2 mm) and frequency characteristics. * **-R:** Generally indicates "Tape & Reel" packaging for automated assembly lines.