The **M7S64FAJ-R** is a specific surface-mount electronic component, typically identified as a **high-frequency, high-stability Crystal Oscillator**. These parts are critical in electronics for generating a precise clock signal required by microprocessors and communication modules. Below is a detailed breakdown of its electronic characteristics and specifications. --- ## 1. Component Overview The M7S series is manufactured by **KDS (Daishinku Corp)**, a leading Japanese manufacturer of quartz crystals and oscillators. The "R" suffix generally denotes compliance with RoHS (Restriction of Hazardous Substances) standards and high-reliability automotive or industrial grading. ### Key Specifications Table | Feature | Specification | | :--- | :--- | | **Type** | SPXO (Simple Packaged Crystal Oscillator) | | **Package Size** | 7.0 x 5.0 mm (7050 Metric) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage ($V_{cc}$)** | Typically 3.3V or 5.0V (varies by sub-code) | | **Frequency Range** | Usually between 1.5 MHz to 80 MHz | | **Mounting Type** | SMD (Surface Mount Device) | | **Terminations** | 4 Pads (Gold plated) | --- ## 2. Pin Configuration The physical layout of the M7S64FAJ-R follows the standard 7050 oscillator footprint: 1. **Pin 1 (OE/Standby):** Output Enable. When high, the oscillator functions; when low, the output goes to a high-impedance state to save power. 2. **Pin 2 (GND):** Connected to the system ground. 3. **Pin 3 (Output):** The clock signal output (Square wave). 4. **Pin 4 ($V_{cc}$):** Power supply input. --- ## 3. Technical Breakdown ### A. Frequency Stability The "FAJ" suffix in the part number often refers to the stability and temperature range. * **Stability:** Typically ±50ppm or ±100ppm. * **Temperature Range:** Often rated for -40°C to +85°C (Industrial Grade). ### B. Load Capacitance This oscillator is designed to drive a specific capacitive load, usually **15pF**. Exceeding this load can result in signal distortion or frequency deviation. ### C. Construction It utilizes a synthetic quartz crystal hermetically sealed in a ceramic package with a metal lid. This ensures long-term reliability and resistance to moisture and mechanical shock. --- ## 4. Typical Applications The M7S64FAJ-R is commonly found in: * **Networking Gear:** Routers, switches, and modems. * **Industrial Control:** PLCs and automation sensors. * **Embedded Systems:** Providing the main clock for ARM or AVR microcontrollers. * **Consumer Electronics:** High-end audio/video processing units.