The **FCR-6G-R** is an electronic component, specifically a **Fiber Optic Receiver** module, commonly used for digital audio applications such as TOSLINK connections. It is designed to convert optical signals (light pulses) back into electrical digital signals. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | Fiber Optic Photo-Receiver | | **Data Rate** | Up to 16 Mbps (High-speed digital data) | | **Operating Voltage (Vcc)** | Typically 2.7V to 5.5V | | **Wavelength** | Peak sensitivity at 650 nm (Red light) | | **Connector Type** | Standard Square TOSLINK (JIS F05) | | **Mounting Type** | Through-hole (Right-angle PCB mount) | --- ### 2. Main Electronic Internal Parts The FCR-6G-R is an integrated module consisting of several internal stages: 1. **Photodetector (PD):** A high-speed PIN photodiode that senses incoming red light pulses from the optical fiber. 2. **Trans-Impedance Amplifier (TIA):** Converts the weak current generated by the photodiode into a usable voltage signal. 3. **Limiting Amplifier / Comparator:** Cleans up the signal, removing noise and ensuring sharp "high" and "low" logic levels (TTL/CMOS compatible). 4. **Output Driver:** Provides the necessary drive current to send the digital signal to the rest of the circuit (e.g., an Audio DSP or DAC). --- ### 3. Pin Configuration The module typically features a 3-pin layout for easy integration: | Pin Number | Name | Description | | :---: | :--- | :--- | | **1** | **Vcc** | Power Supply (Positive) | | **2** | **GND** | Ground | | **3** | **Vout** | Digital Signal Output | --- ### 4. Application Areas * **Digital Audio:** Found in DVD players, AV receivers, and sound cards for S/PDIF transmission. * **Industrial Control:** Used for noise-immune data communication in high-interference environments. * **Consumer Electronics:** TV sets and gaming consoles for optical audio output. ---