The part number **O-CS8-APT17ISU-R** refers to a high-performance **Clock Oscillator** or **TCXO (Temperature Compensated Crystal Oscillator)**, typically used in high-stability communication systems. Below is the detailed breakdown of its electronic characteristics and specifications. --- ## 1. Component Overview This component is designed to provide a highly stable frequency reference. The suffixing and prefixing suggests it is a surface-mount device (SMD) often utilized in industrial or telecommunications environments. ### Core Specifications | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | Temperature Compensated Crystal Oscillator (TCXO) | | **Package Type** | SMD (Surface Mount Device) | | **Frequency Stability** | High (often ±0.5ppm to ±2.5ppm depending on exact series) | | **Output Type** | CMOS / Clipped Sine Wave | | **Supply Voltage** | Usually 1.8V, 2.5V, or 3.3V | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | --- ## 2. Pin Configuration (Typical) Most oscillators in this series follow a standard 4-pin or 6-pin footprint: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | NC / Vcont | No connection or Voltage Control (for VCTCXO) | | **2** | GND | Ground Connection | | **3** | Output | Frequency Output Signal | | **4** | Vcc | Supply Voltage | --- ## 3. Key Electronic Features 1. **Temperature Compensation:** Unlike standard crystals, this part includes internal circuitry to compensate for frequency "drift" caused by changes in ambient temperature. 2. **Low Phase Noise:** Engineered to minimize jitter, making it suitable for RF transceivers and GPS/GNSS modules. 3. **Tape & Reel (-R):** The suffix **-R** indicates that the parts are packaged in a Tape and Reel format, optimized for automated pick-and-place assembly lines. --- ## 4. Typical Applications * **Wireless Communication:** Base stations, small cells, and IoT gateways. * **Navigation:** GNSS/GPS receivers requiring precise timing for location fixes. * **Networking:** Synchronous Ethernet (SyncE) and high-speed routers. * **Industrial:** Sensors and controllers operating in fluctuating temperature environments. --- ## 5. Technical Comparison | Feature | Standard Crystal | O-CS8-APT17ISU-R (TCXO) | | :--- | :--- | :--- | | **Internal Logic** | None (Passive) | Active (Oscillator + Comp) | | **Stability** | ~50 ppm | ~2 ppm | | **Power Req.** | None | Required (Vcc) |