The **UCD4015G-P16-R** is a CMOS logic integrated circuit, specifically a **Dual 4-Stage Static Shift Register**. It belongs to the 4000 series of logic chips and is designed for low-power, high-voltage flexibility applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Function** | Dual 4-Stage Static Shift Register | | **Logic Family** | CD4000 (CMOS) | | **Supply Voltage (Vcc)** | 3.0V to 18V | | **Package Type** | TSSOP-16 (Thin Shrink Small Outline Package) | | **Packing Type** | Tape & Reel (R) | | **Operating Temperature** | -40°C to +125°C | | **Pin Count** | 16 Pins | --- ### 2. Functional Description The device contains two identical, independent 4-stage serial-input/parallel-output registers. * **Shift Operation:** Data is shifted into the first stage on every **positive-going transition** of the clock pulse. * **Parallel Output:** All four stages of each register have taps available as outputs ($Q_0, Q_1, Q_2, Q_3$). * **Reset Function:** Each register has an independent **Reset** pin. When the Reset pin is pulled HIGH, all stages are cleared to "0" regardless of the clock or data input. --- ### 3. Pin Configuration (Common TSSOP-16 Layout) | Pin No. | Symbol | Description | | :--- | :--- | :--- | | 1, 9 | **CLOCK** | Clock Input (Registers 1 & 2) | | 2, 10 | **RESET** | Master Reset (Active High) | | 3, 4, 5, 13 | **Q0 - Q3** | Parallel Outputs | | 7, 15 | **DATA** | Serial Data Input | | 8 | **VSS** | Ground (0V) | | 16 | **VDD** | Supply Voltage (Positive) | --- ### 4. Applications and Use Cases * **Serial-to-Parallel Conversion:** Converting a serial stream of data from a microcontroller into multiple parallel outputs to drive LEDs or relays. * **Digital Delay Lines:** Creating specific timing delays in digital circuits. * **Control Registers:** Storing state information in industrial control systems. * **Pattern Generators:** Used in simple sequence generation for lighting or signaling. --- ### 5. Part Number Breakdown * **UCD:** Manufacturer Prefix (often associated with Unisonic Technologies - UTC). * **4015:** Generic functional part number (Dual 4-stage Shift Register). * **G:** Halogen-free/Green material. * **P16:** TSSOP-16 Package. * **R:** Tape & Reel packaging for automated SMT assembly.