The **ABM2-BA6A2-R** is a specific part number for a surface-mount (SMD) quartz crystal resonator manufactured by **Abracon**. This component is primarily used to provide a precise frequency reference for microcontrollers, RF circuits, and digital timing applications. --- ### 1. Technical Specifications The part number follows a specific nomenclature. Below are the primary technical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Component Type** | Quartz Crystal (Resonator) | | **Frequency** | Typically 8.000 MHz (Standard for this series) | | **Package Size** | 8.0 x 4.5 x 1.4 mm (ABM2 Series) | | **Mounting Type** | Surface Mount (SMD) | | **Frequency Tolerance** | ±30 ppm | | **Frequency Stability** | ±50 ppm | | **Operating Temperature** | -40°C to +85°C | | **Load Capacitance** | 18 pF (Standard) | | **ESR (Equivalent Series Resistance)** | 70 Ohms (Max) | --- ### 2. Physical Layout and Construction The ABM2 series is designed for durability and precision. * **Package Construction:** It uses a glass-sealed ceramic package, which provides high reliability and environmental protection. * **Pin Configuration:** It is a 2-pad device. * **Sealing:** Hermetically sealed to prevent moisture or atmospheric contaminants from affecting the oscillation frequency. --- ### 3. Key Applications Because of its stability and temperature range, the ABM2-BA6A2-R is commonly found in: 1. **Microprocessor Clocks:** Providing the heartbeat for 8-bit or 32-bit MCUs. 2. **Communication Equipment:** Used in modems and routers for signal timing. 3. **Industrial Controls:** Suitable for automation hardware due to the -40°C to +85°C temperature range. 4. **Consumer Electronics:** Used in computer peripherals and white goods. --- ### 4. Circuit Implementation When integrating this part into a PCB design, it requires external "load capacitors" ($C_L$) to ensure the crystal oscillates at the correct frequency. ```c // Typical Pierce Oscillator Circuit Diagram Concept // [MCU_XTAL_IN] ----+---- [Crystal] ----+---- [MCU_XTAL_OUT] // | | // [C1] [C2] // | | // (GND) (GND) ``` *Note: For a load capacitance of 18pF, the values of C1 and C2 are typically calculated as $C = 2(C_L - C_{stray})$, usually resulting in values around 22pF to 33pF.*