The **WAC-AABA-R/Q** refers to a specific electronic component configuration, typically associated with high-performance **Crystal Oscillators (TCXO or VCTCXO)** used in telecommunications and precision timing applications. Below is a breakdown of the electronic specifications and characteristics associated with this part numbering scheme. --- ### 1. Component Identification This part belongs to the category of **Frequency Control Products**. The alphanumeric code specifies the electrical properties, physical dimensions, and stability. | Segment | Meaning | Description | | :--- | :--- | :--- | | **WAC** | Series/Model | Represents the base series (often an SMD 7.0x5.0mm or 5.0x3.2mm package). | | **AABA** | Technical Specs | Encodes the operating voltage, frequency stability, and temperature range. | | **R / Q** | Output / Tuning | Indicates the output type (e.g., CMOS/Clipped Sine) and specific tuning range (Voltage Control). | --- ### 2. Key Electronic Parameters Typically, a "WAC-AABA" configuration implies the following technical profile: #### A. Frequency Stability * **Stability:** Often rated at **±0.5ppm to ±2.5ppm** (parts per million). * **Temperature Range:** Industrial standard, usually **-40°C to +85°C**. * **Aging:** Very low drift, typically < ±1.0ppm per year. #### B. Electrical Characteristics * **Supply Voltage ($V_{dd}$):** Usually operates at **3.3V** or **2.5V** DC. * **Current Consumption:** Low power design, generally between **1.5mA and 4.0mA**. * **Output Waveform:** * **Clipped Sine Wave:** Reduces EMI (Electromagnetic Interference). * **CMOS:** Provides a rail-to-rail square wave for digital logic. #### C. Control Voltage (The "V" in VCTCXO) If the part is a **VCTCXO** (Voltage Controlled Temperature Compensated Crystal Oscillator), it includes a "Control Voltage" pin. * **Tuning Range:** Typically ±5ppm to ±10ppm. * **Control Voltage Range:** 0.3V to 2.4V (for a 3.3V supply). --- ### 3. Physical Construction The part is usually housed in a **Hermetically Sealed Ceramic Package**. * **SMD Type:** Surface Mount Device. * **Pad Configuration:** 1. **Pin 1:** Control Voltage (or NC). 2. **Pin 2:** Ground (GND). 3. **Pin 3:** Output. 4. **Pin 4:** Supply Voltage ($V_{dd}$). --- ### 4. Common Applications Due to its high stability and small form factor, it is used in: * **GPS/GNSS Receivers:** Requires precise timing to calculate coordinates. * **Base Stations (LTE/5G):** For synchronization of data packets. * **IoT Modules:** Reliable clocking for wireless communication (Wi-Fi/Bluetooth). ---