The **UCD4015L-S16-R** is a specific part number typically associated with a **Dual 4-Stage Static Shift Register**. It is the UTC (Unisonic Technologies Co.) equivalent of the industry-standard CD4015 CMOS integrated circuit. --- ## 1. Technical Specifications Below are the primary electrical and physical characteristics of the UCD4015L-S16-R: | Parameter | Specification | | :--- | :--- | | **Logic Type** | Dual 4-Stage Static Shift Register | | **Supply Voltage (Vcc)** | 3V to 18V | | **Logic Family** | 4000 Series (CMOS) | | **Package Type** | SOP-16 (Small Outline Package) | | **Operating Temperature** | -40°C to +85°C | | **Output Current** | ~6.8 mA (at 15V) | | **Packaging Code** | R (Tape & Reel) | --- ## 2. Key Components & Architecture The IC contains two identical, independent 4-stage serial-input/parallel-output registers. Each register has the following inputs and outputs: * **Data Input (D):** Serial data enters here. * **Clock (CLK):** Shifts the data through the registers on the positive-going transition. * **Reset (RST):** Asynchronous clear that resets all stages to "0" when high. * **Parallel Outputs (Q0 - Q3):** Four individual outputs for each register stage. ### Logic Pinout Structure (SOP-16) ```text +---U---+ 1Q3 1 | | 16 VDD 1Q2 2 | | 15 1RST 1Q1 3 | | 14 1DATA 2CLK 4 | | 13 1CLK 2Q0 5 | | 12 2RST 2Q1 6 | | 11 2DATA 2Q2 7 | | 10 2Q3 VSS 8 | | 9 1Q0 +-------+ ``` --- ## 3. Functionality & Applications The device acts as a buffer or a serial-to-parallel converter. When a clock pulse is received, the bit at the "Data" pin moves to Q0, the previous Q0 moves to Q1, and so on. ### Common Use Cases: 1. **Serial-to-Parallel Conversion:** Converting a serial stream of data from a microcontroller into multiple parallel control lines. 2. **Digital Delay Lines:** Creating a time delay for digital signals. 3. **Pattern Generators:** Generating specific sequences of high/low signals. 4. **Remote Control Systems:** De-multiplexing control signals. --- ## 4. Part Number Breakdown The suffix `L-S16-R` provides specific manufacturing details: * **L:** Lead-free/Halogen-free (Environmentally friendly). * **S16:** Denotes the **SOP-16** package size. * **R:** Indicates **Tape & Reel** packing for automated assembly.