The part number **M7S71TBJ-R** refers to a high-precision **SMD (Surface Mount Device) Crystal Oscillator**. These components are essential in electronic circuits for generating stable clock frequencies required by microprocessors and communication interfaces. --- ### Technical Specifications The M7S series is typically manufactured by **KDS (Daishinku Corp)**. Below are the general technical characteristics for this specific series: | Parameter | Typical Specification | | :--- | :--- | | **Type** | SPXO (Simple Packaged Crystal Oscillator) | | **Package Size** | 7.0 x 5.0 mm (7050 Metric) | | **Frequency Range** | 1.0 MHz to 80.0 MHz (Specific to exact sub-model) | | **Supply Voltage (Vcc)** | 1.8V / 2.5V / 3.3V / 5.0V (Varies) | | **Output Type** | CMOS / TTL Compatible | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Packaging** | Tape & Reel (Indicated by the "-R" suffix) | --- ### Key Internal Components An oscillator like the M7S71TBJ-R consists of several integrated parts within its ceramic housing: 1. **AT-Cut Quartz Crystal:** The "heart" of the component that vibrates at a specific frequency when voltage is applied. 2. **Oscillation IC:** A CMOS integrated circuit that maintains the vibration and squares the output waveform. 3. **Gold-Plated Pads:** Four bottom pads used for: * **Pin 1:** Standby (Enable/Disable) or No Connect. * **Pin 2:** Ground (GND). * **Pin 3:** Output (Clock Signal). * **Pin 4:** Supply Voltage (Vcc). --- ### Part Number Breakdown (Nomenclature) While specific to the manufacturer's internal coding, the string can generally be interpreted as follows: * **M7S:** Series Identifier (7.0x5.0mm CMOS Oscillator). * **71:** Specific voltage/stability code (often representing 3.3V or 5V operation). * **TBJ:** internal manufacturing process/temperature tolerance code. * **-R:** Packaging designation (Taping/Reel) for automated SMT assembly. ### Applications * **Networking:** Routers, Switches, and Hubs. * **Computing:** Motherboards and peripheral controllers. * **Industrial:** PLC controllers and embedded sensors requiring a reliable timing source.