The **M3H21TCG-R** is an electronic component manufactured by **Taitien**, a leader in frequency control products. This specific part is a high-performance **Crystal Oscillator (XO)** designed for precision timing in industrial and communication applications. --- ### 1. Technical Specifications Below is a breakdown of the key electronic characteristics of the M3H21TCG-R: | Parameter | Specification | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Output Type** | CMOS / LVCMOS | | **Supply Voltage (Vdd)** | 3.3V (Standard) | | **Package Size** | 3.2mm x 2.5mm (SMD 3225) | | **Frequency Stability** | ±25 ppm / ±50 ppm (Series dependent) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Pin Count** | 4 Pins | --- ### 2. Functional Pinout The device follows a standard 4-pin surface mount layout: 1. **Pin 1 (Tri-State / OE):** Output Enable. Allows the output to be disabled to save power (High = Enable, Low/Open = High Impedance). 2. **Pin 2 (GND):** Ground connection. 3. **Pin 3 (Output):** The clock signal output (LVCMOS square wave). 4. **Pin 4 (Vdd):** DC Power supply input. --- ### 3. Key Electronic Features * **Low Jitter:** Optimized for data transmission to ensure signal integrity across high-speed buses. * **Compact Footprint:** The 3225 package is ideal for space-constrained PCB designs like IoT devices or handheld electronics. * **LVCMOS Output:** Provides a rail-to-rail square wave compatible with most modern Microcontrollers (MCUs) and FPGAs. * **Seam Sealed:** The package is hermetically sealed to protect the quartz crystal from environmental moisture and contaminants, ensuring long-term reliability. --- ### 4. Common Applications Due to its stability and industrial temperature rating, this part is typically found in: * **Networking:** Ethernet switches and routers. * **Industrial Automation:** PLCs and sensor nodes. * **Consumer Electronics:** High-definition video equipment and smart home hubs. * **Embedded Systems:** Master clock for ARM-based processors. ---