The **MA61TCA-R** is a specific electronic component, typically categorized as a **Surface Mount Device (SMD) Quartz Crystal Oscillator**. It is widely used in telecommunications, consumer electronics, and industrial automation to provide a stable frequency reference for microprocessors and digital circuits. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the primary electronic characteristics: | Parameter | Typical Value / Range | Description | | :--- | :--- | :--- | | **Component Type** | Quartz Crystal | Passive frequency control component. | | **Package Size** | 6.0 x 3.5 mm | Standard ceramic SMD package. | | **Frequency Range** | 8.000 MHz to 50.000 MHz | Varies by specific sub-model. | | **Load Capacitance** | 10pF, 12pF, or 20pF | Determined by circuit design requirements. | | **Frequency Tolerance** | ±10 ppm to ±50 ppm | Precision at room temperature (25°C). | | **Operating Temperature** | -40°C to +85°C | Industrial grade temperature stability. | --- ### 2. Physical Construction The "MA" series generally refers to a specific package architecture: * **Sealing:** Usually a seam-welded metal lid on a ceramic base, ensuring high reliability and aging resistance. * **Terminals:** Features 2 or 4 gold-plated pads for surface mount soldering (SMT). * **Internal Material:** High-purity synthetic quartz wafer cut at a specific angle (usually AT-cut) to optimize temperature stability. --- ### 3. Part Number Breakdown (MA61TCA-R) While manufacturers have unique codes, the suffixing usually follows this logic: * **MA61:** Indicates the series and physical dimensions (6.0 x 3.5mm). * **T:** Often refers to **Tape and Reel** packaging for automated pick-and-place machines. * **CA:** Typically denotes a specific **Frequency Tolerance** or **Load Capacitance** configuration. * **-R:** Generally indicates **RoHS Compliance** (Lead-free) or a specific revision. --- ### 4. Application Areas The MA61TCA-R is used in circuits requiring timing synchronization: 1. **Consumer Electronics:** Smart meters, Bluetooth modules, and Wi-Fi routers. 2. **Computing:** USB controllers, embedded systems, and PC peripherals. 3. **Industrial:** PLC controllers and sensor interfaces. --- ### 5. Implementation Example In a standard Pierce Oscillator circuit, the MA61TCA-R is placed between the `XTAL_IN` and `XTAL_OUT` pins of a microcontroller. ```cpp // Conceptual Logic for Clock Initialization (e.g., STM32) void SystemClock_Config(void) { // 1. Enable External High Speed oscillator (HSE) // 2. Select MA61TCA-R as the source (e.g., 16MHz) // 3. Configure PLL to multiply frequency for CPU RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; } ```