The **MA74TCA-R** is an electronic component primarily classified as a **Precision Temperature-Compensated Crystal Oscillator (TCXO)**. These parts are critical in electronic circuits that require a highly stable clock signal regardless of temperature fluctuations. --- ## 1. Core Technical Specifications The following table summarizes the key electrical and physical attributes of the MA74TCA-R: | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Temperature-Compensated Crystal Oscillator (TCXO) | | **Output Frequency** | Custom (Commonly 10MHz to 52MHz) | | **Frequency Stability** | ±0.5 ppm to ±2.5 ppm (over temp range) | | **Operating Voltage** | 1.8V to 3.3V DC | | **Output Type** | Clipped Sine Wave or CMOS | | **Package Size** | 7.0 x 5.0 mm (Surface Mount Device) | | **Pin Count** | 4 or 10 Pins (Depending on specific series sub-type) | --- ## 2. Key Internal Components The MA74TCA-R is not a single crystal but an integrated circuit module consisting of: 1. **Quartz Crystal Resonator:** The mechanical heart of the part that vibrates at a specific frequency. 2. **Compensation Network:** A temperature sensor and a compensation circuit (often an ASIC) that adjusts the load capacitance to counteract the crystal's natural frequency drift caused by heat or cold. 3. **Voltage Regulator:** Internal circuitry to ensure the frequency remains stable even if the input power supply fluctuates slightly. --- ## 3. Applications and Usage Because of its high precision and small form factor, this part is commonly used in: * **GPS Receivers:** Where precise timing is required to calculate location. * **Wireless Communication:** Base stations and high-speed radio links. * **IoT Devices:** Low-power devices that need to maintain synchronization over long periods. * **Test and Measurement:** Handheld signal analyzers or frequency counters. --- ## 4. Part Number Breakdown (MA Series) While naming conventions vary by manufacturer (often Mercury Electronic), the suffix often denotes: * **MA:** Product Series (TCXO). * **74:** Package size code (7.0x5.0mm). * **TCA:** Temperature Range/Stability grade. * **-R:** Indicates compliance with **RoHS** (Restriction of Hazardous Substances) or Tape & Reel packaging.