The part number **M7S43TAJ-R** refers to a high-performance **Crystal Oscillator** manufactured by **TXC Corporation**. Specifically, it belongs to the 7S series of SMD (Surface Mount Device) oscillators. --- ### 1. Key Technical Specifications Based on the TXC 7S series nomenclature, here are the primary technical characteristics of this component: | Feature | Specification | | :--- | :--- | | **Type** | CMOS Output Crystal Oscillator | | **Package Size** | 7.0 x 5.0 x 1.3 mm (6 Pads) | | **Supply Voltage (Vdd)** | 3.3V (Typical for the '43' code) | | **Output Type** | CMOS / TTL Compatible | | **Frequency Stability** | ±25 ppm to ±50 ppm (Depending on grade) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Packaging** | Tape & Reel ("-R") | --- ### 2. Breakdown of the Part Number The alphanumeric string provides specific details about the component's construction: * **M7S**: Represents the product family (SMD CMOS Oscillator, 7.0x5.0mm). * **43**: Typically indicates the operating voltage (3.3V). * **TAJ**: This is a specific internal factory code representing frequency and stability calibration (Common frequencies for this series include 25MHz, 50MHz, or 125MHz). * **-R**: Indicates the packaging method, which is **Tape & Reel**, intended for automated Pick-and-Place assembly. --- ### 3. Application and Usage These oscillators are used to provide a precise clock signal for digital circuits. Common applications include: 1. **Networking**: Ethernet switches, routers, and high-speed modems. 2. **Computing**: Motherboards, server management controllers, and storage devices. 3. **Industrial**: PLC (Programmable Logic Controllers) and automation sensors. 4. **Audio/Video**: High-definition video processing units. --- ### 4. Circuit Implementation When integrating the M7S43TAJ-R into a PCB design, keep the following in mind: ```markdown * Pin 1: OE (Output Enable) or NC (No Connect) * Pin 2: NC * Pin 3: GND (Ground) * Pin 4: Output (Clock Signal) * Pin 5: NC * Pin 6: Vdd (Power Supply) ``` *Note: It is recommended to place a 0.01µF to 0.1µF bypass capacitor as close to the Vdd pin as possible to filter power supply noise.*