The **M3H21TAG-R** is a specific electronic component typically categorized under high-precision timing or frequency control devices, often associated with Surface Mount Device (SMD) oscillators or SAW (Surface Acoustic Wave) resonators/filters. Below is a breakdown of the electronic characteristics and specifications generally associated with this part series. --- ### 1. General Specifications While full datasheets are often proprietary to manufacturers like **Kyocera** or **TDK/EPCOS**, the "M3" series usually follows these parameters: | Parameter | Typical Value | Unit | | :--- | :--- | :--- | | **Component Type** | SMD Oscillator / Filter | - | | **Mounting Type** | Surface Mount (SMD) | - | | **Lead Finish** | RoHS Compliant (Gold or Tin) | - | | **Operating Temp** | -40 to +85 | °C | | **Packaging** | Tape & Reel (indicated by "-R") | - | --- ### 2. Key Electronic Features #### A. Frequency Control The "TAG" designation in many frequency components refers to a specific frequency band or a tolerance grouping. These parts are designed to maintain a stable output frequency despite changes in temperature or voltage. #### B. Surface Acoustic Wave (SAW) Technology If the part is a SAW filter/resonator (common for this numbering scheme): * **Low Insertion Loss:** Minimizes signal strength degradation. * **High Selectivity:** Effectively filters out out-of-band noise. * **Impedance Matching:** Usually designed for 50Ω systems. #### C. Power and Signal * **Voltage Range:** Typically operates between **1.8V to 3.3V**. * **Output Type:** CMOS or Clipped Sine Wave (depending on the internal IC). --- ### 3. Application Use Cases The M3H series is frequently found in the following electronic circuits: 1. **Telecommunications:** Used in mobile handsets for signal filtering. 2. **Automotive Electronics:** Employed in RKE (Remote Keyless Entry) or TPMS (Tire Pressure Monitoring Systems). 3. **Industrial IoT:** Provides timing for low-power wireless modules (Zigbee, LoRa). --- ### 4. Part Number Breakdown (Generic) | Segment | Meaning | | :--- | :--- | | **M3H** | Series identifier (Package size/Technology) | | **21** | Frequency or Design code | | **TAG** | Tolerance, Temperature range, or specific tuning | | **-R** | Packaging suffix (Reel) | ---