The **MC4556-S08-R** is a high-performance, high-speed dual operational amplifier (Op-Amp). It is specifically designed to provide high output current capability and wide bandwidth, making it an excellent choice for audio pre-amplifiers and industrial control circuits. --- ### 1. General Specifications The following table summarizes the key electrical characteristics of the MC4556-S08-R: | Parameter | Specification | | :--- | :--- | | **Type** | Dual Operational Amplifier | | **Operating Voltage** | ±2V to ±18V | | **Output Current** | High (up to 70mA typical) | | **Gain Bandwidth Product** | 8 MHz | | **Slew Rate** | 3 V/µs | | **Package Type** | SOP-8 (Surface Mount) | | **Input Offset Voltage** | 0.5 mV (Typical) | --- ### 2. Pin Configuration (SOP-8) As a dual op-amp in an 8-pin package, the pinout follows the industry standard for dual amplifiers: 1. **Pin 1 (OUTPUT A):** Output of the first amplifier. 2. **Pin 2 (INPUT A-):** Inverting input of the first amplifier. 3. **Pin 3 (INPUT A+):** Non-inverting input of the first amplifier. 4. **Pin 4 (V-):** Negative power supply or Ground. 5. **Pin 5 (INPUT B+):** Non-inverting input of the second amplifier. 6. **Pin 6 (INPUT B-):** Inverting input of the second amplifier. 7. **Pin 7 (OUTPUT B):** Output of the second amplifier. 8. **Pin 8 (V+):** Positive power supply. --- ### 3. Key Features and Advantages * **High Current Drive:** Unlike standard op-amps (like the LM358), the MC4556 can drive low-impedance loads (such as headphones or small speakers) directly due to its high output current capability. * **Low Noise:** It offers low input noise voltage, which is essential for high-fidelity audio applications. * **Wide Power Range:** It can operate on a wide range of voltages, allowing for flexibility in both battery-powered and mains-powered designs. * **Short-Circuit Protection:** The outputs are generally protected against short circuits, increasing the robustness of the final product. --- ### 4. Typical Applications The MC4556 is most commonly found in the following electronic circuits: * **Headphone Amplifiers:** Due to its ability to drive low-impedance loads. * **Audio Mixers:** Used in the gain stages of professional audio equipment. * **Active Filters:** High-speed processing for signal filtering. * **Industrial Converters:** Signal conditioning for sensors requiring a higher current drive. --- ### 5. Part Number Breakdown The suffix often indicates the packaging and manufacturer-specific details: * **MC4556:** The core part number (based on the RC4556 architecture). * **S08:** Indicates the **SOP-8** (Small Outline Package) form factor. * **R:** Usually indicates **Tape & Reel** packaging for automated assembly.