The **M7S51FAJ-R** is a specific part number belonging to the **M7S series** of high-stability, surface-mount (SMD) clock oscillators manufactured by **KDS (Daishinku Corp.)**. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. General Overview The M7S51FAJ-R is a CMOS output crystal oscillator designed for high-precision timing applications. It is characterized by its small form factor and wide operating voltage range. | Feature | Specification | | :--- | :--- | | **Manufacturer** | KDS (Daishinku Corp.) | | **Package Type** | 7050 (7.0 x 5.0 mm) | | **Output Type** | CMOS | | **Mounting Type** | Surface Mount (SMD) | | **Lead Status** | RoHS Compliant / Pb-Free | --- ### 2. Technical Specifications Based on the "51FAJ" coding suffix, here are the typical electrical parameters for this series: | Parameter | Value / Detail | | :--- | :--- | | **Supply Voltage (Vcc)** | +5.0V (Standard for the '5' series) | | **Frequency Stability** | ±50 ppm or ±100 ppm (depending on specific binning) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Current Consumption** | 20mA to 45mA (Frequency dependent) | | **Output Load** | 15pF (Standard CMOS load) | | **Duty Cycle** | 45% to 55% | | **Rise/Fall Time** | 4ns - 10ns Max | --- ### 3. Pin Configuration The M7S series typically utilizes a 4-pad layout: 1. **Pad 1: Standby (OE)** - Output Enable/Disable. When high (or open), the oscillator functions. When low, the output goes to high impedance. 2. **Pad 2: Ground (GND)** - Connected to the system ground. 3. **Pad 3: Output** - The clock signal output. 4. **Pad 4: Vcc** - Power supply input. --- ### 4. Key Features & Applications * **Tri-state Function:** Allows the oscillator to be disconnected from the bus for testing or power-saving modes. * **High Reliability:** The hermetic sealing of the 7050 package ensures long-term frequency stability. * **Applications:** * Networking equipment (Routers, Switches). * Industrial control systems. * Data communications. * General-purpose microprocessors and DSPs. --- ### 5. Part Number Breakdown (Typical KDS Logic) * **M7S:** Series Name (CMOS Crystal Oscillator). * **5:** Voltage Code (usually 5.0V). * **1:** Frequency Stability code. * **F:** Temperature Range code. * **AJ:** Internal Factory/Specification code. * **R:** Packaging code (usually refers to Tape & Reel).