## Overview of the MM1663K The **MM1663K** is a specialized integrated circuit (IC) developed by Mitsumi (now part of MinebeaMitsumi). It is primarily designed as a **video driver IC** with a built-in low-pass filter, commonly used in consumer electronics to manage analog video signals. --- ### Key Specifications | Feature | Specification | | :--- | :--- | | **Function** | Video Driver with Low-Pass Filter (LPF) | | **Operating Voltage** | 2.8V to 5.5V | | **Current Consumption** | 7.0 mA (Typical) | | **Cut-off Frequency** | 6.75 MHz (Typical) | | **Package Type** | SOT-26 / SC-74 (Miniature Surface Mount) | | **Output Type** | 75Ω Driver (Standard Video Load) | --- ### Internal Architecture and Components The MM1663K integrates several electronic stages into a single miniature package to reduce the need for external components: 1. **Low-Pass Filter (LPF):** * It features a 4th-order or higher internal filter. * **Purpose:** It removes high-frequency clock noise and "aliasing" artifacts from Digital-to-Analog Converters (DACs) used in digital video systems. 2. **6dB Amplifier:** * Standard video signals often require a 6dB gain to compensate for the voltage drop caused by the 75Ω termination resistor at the receiver end. 3. **Output Driver:** * A high-current output stage capable of driving a 75Ω coaxial cable or standard RCA video input. 4. **Power Save / Standby Mode:** * Includes a "Power Save" pin that drops current consumption to near zero (typically <1μA) when the device is not in use, making it ideal for battery-operated devices. --- ### Common Applications The MM1663K is found in devices that require an analog video output (Composite or S-Video): * **Digital Still Cameras (DSC):** For "Video Out" functionality to a TV. * **Portable Media Players:** Handheld devices with AV outputs. * **Set-Top Boxes:** Processing the SD (Standard Definition) video signal before output. * **DVD/Blu-ray Players:** Acting as the final output buffer for analog signals. --- ### Typical Pin Configuration (SOT-26) | Pin No. | Name | Description | | :--- | :--- | :--- | | 1 | **VIN** | Video Signal Input | | 2 | **VCC** | Power Supply (Positive) | | 3 | **PS** | Power Save Control (High = On, Low = Standby) | | 4 | **VOUT** | Video Signal Output | | 5 | **GND** | Ground | | 6 | **SAG** | Sag Correction Pin (Used to reduce output capacitor size) | ---