### ABM2-G4WRA2-R: Electronic Part Specifications The **ABM2-G4WRA2-R** is a specific electronic component belonging to the **Quartz Crystal** family. These components are passive devices used to generate precise clock frequencies in electronic circuits. --- ### 1. General Overview This part is manufactured by **Abracon LLC**. It is a surface-mount (SMD) crystal unit designed for high-density applications where precision and a small footprint are required. ### 2. Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Quartz Crystal (Passive) | | **Frequency** | 12.000 MHz (Typical for G4WRA series) | | **Package / Case** | 4-SMD, No Lead (Glass Seal) | | **Mounting Type** | Surface Mount (SMD) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Load Capacitance** | 18 pF (Standard for this suffix) | | **Frequency Tolerance** | ±20 ppm | | **Frequency Stability** | ±30 ppm | | **ESR (Equivalent Series Resistance)** | 60 Ohms (Max) | --- ### 3. Key Features & Construction * **Hermetic Sealing:** Uses a glass-to-metal seal which provides excellent long-term reliability and environmental protection. * **Low Profile:** The ABM2 series is known for its ultra-miniature height (approx. 1.3mm), making it ideal for thin consumer electronics. * **RoHS Compliant:** The "R" suffix typically denotes compliance with lead-free and environmental standards. * **Aging:** Typically ±5 ppm max per year, ensuring the clock remains stable over the life of the product. ### 4. Common Applications Due to its stability and small form factor, this part is commonly found in: 1. **Microcontrollers:** Providing the external heart-beat for MCUs (e.g., STM32, AVR). 2. **Communication Modules:** Bluetooth, ZigBee, and Wi-Fi modules requiring precise timing. 3. **Industrial Controls:** Used in PLCs and sensors operating in harsh temperature ranges. 4. **Computer Peripherals:** USB hubs, keyboards, and mouse controllers. --- ### 5. Circuit Implementation When integrating this part, it is typically connected to the `OSC_IN` and `OSC_OUT` pins of an Integrated Circuit (IC) with two load capacitors ($C_1$ and $C_2$) connected to ground. ```c // Example of Load Capacitance Calculation // CL = (C1 * C2) / (C1 + C2) + Cstray // For ABM2-G4WRA2-R (18pF), common values are C1=C2=22pF to 27pF // (depending on PCB stray capacitance). ```