The **ND3FC16P-R** is a specific type of high-precision electronic component categorized as a **DIP Rotary Coded Switch**. These components are widely used for setting binary or hexadecimal values on a circuit board manually (e.g., setting device IDs or configurations). --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Component Type** | Rotary Coded Switch | | **Output Code** | Complementary Code | | **Number of Positions** | 16 (Hexadecimal: 0-F) | | **Actuator Type** | Flat / Screwdriver Slot | | **Mounting Type** | Through-Hole (PCB) | | **Contact Rating** | 100mA @ 5V DC (Switching) / 100mA @ 50V DC (Non-switching) | | **Pitch** | 2.54mm (Standard DIP) | | **Operating Temp** | -25°C to +85°C | --- ### 2. Functional Characteristics * **Complementary Code:** Unlike standard binary coded decimal (BCD) switches, this model provides a "complementary" output. This means that for a given position, the bits that would normally be HIGH (1) in binary are LOW (0), and vice versa. * **16-Position Logic:** It maps positions 0 through 15. In a digital circuit, this represents 4 bits of data ($2^4 = 16$). * **Compact Form Factor:** The "ND3" series is designed for high-density mounting. It typically has a 3x3 terminal layout or a standard DIP footprint depending on the sub-variant. * **Environmental Sealing:** Most parts in this series are process-sealed (usually with an O-ring or resin base) to allow for automated wave soldering and cleaning without damaging the internal contacts. --- ### 3. Pinout and Circuit Integration The device typically features 5 or 6 pins. 1. **Common (C):** The input voltage or ground reference. 2. **Output Bits (1, 2, 4, 8):** The coded outputs that represent the dial position. #### Connection Logic Example ```c // Example logic for reading a 16-position switch (Pseudo-code) int switchValue = read_pins(Pin1, Pin2, Pin4, Pin8); // Since it is Complementary Code: int actualPosition = ~switchValue & 0x0F; ``` --- ### 4. Common Applications * **Industrial Controls:** Setting Modbus or CAN bus node addresses. * **Telecommunications:** Configuring frequency channels or hardware IDs. * **Automation:** Setting timer intervals or mode selection on PLCs. * **Peripheral Devices:** Identifying hardware units in a daisy-chained system.