The **FLCS-22-R/Q** refers to a high-reliability, low-profile, surface-mount (SMD) quartz crystal resonator, typically produced by manufacturers like **Kyocera** or **AVX**. These components are fundamental in electronics for generating stable clock frequencies. --- ### 1. General Specifications The "FLCS" series is designed for miniaturized applications where PCB space is limited but timing precision is critical. | Parameter | Typical Value / Range | | :--- | :--- | | **Frequency Range** | 16.000 MHz to 60.000 MHz | | **Package Size** | 2.5 x 2.0 mm (standard for the series) | | **Load Capacitance ($C_L$)** | 8pF to 12pF (standard) | | **Frequency Tolerance** | ±10 ppm to ±30 ppm | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | --- ### 2. Key Electronic Features * **Piezoelectric Effect:** The device utilizes the mechanical vibration of a quartz crystal to create a highly precise electrical signal. * **Low Profile:** The "22" in the part number often denotes the dimensions (2.5 x 2.0 mm), making it suitable for ultra-thin consumer electronics. * **AEC-Q200 Compliance:** Many variations of this series (indicated by specific suffixes) are automotive-grade, meaning they can withstand high vibration and thermal shock. * **Hermetic Sealing:** The unit is typically seam-welded in a ceramic package to protect the quartz element from moisture and oxidation. --- ### 3. Pin Configuration (Internal Mapping) Standard 4-pad SMD crystals like the FLCS-22 series follow a specific internal layout: | Pad Number | Function | Description | | :--- | :--- | :--- | | **1** | Crystal Terminal | Connection to the oscillator circuit | | **2** | Ground (GND) | Connected to the metal lid for EMI shielding | | **3** | Crystal Terminal | Connection to the oscillator circuit | | **4** | Ground (GND) | Connected to the metal lid for EMI shielding | --- ### 4. Typical Applications These oscillators are found in circuits requiring "heartbeat" timing: 1. **Microcontrollers (MCU):** External clock source for ARM Cortex-M or AVR chips. 2. **Wireless Modules:** Providing the base frequency for Bluetooth, Wi-Fi, or Zigbee. 3. **USB Controllers:** High-speed data synchronization. 4. **Automotive ECU:** Timing for sensor data processing. ---