The **UCD4049BL-P16-R** is a specific part number typically representing a **Hex Inverting Buffer** integrated circuit. It is part of the 4000 series logic family, widely used for signal conditioning and logic level conversion. --- ### 1. General Specifications The device contains six independent inverting buffers. Below are the primary technical characteristics: | Parameter | Specification | | :--- | :--- | | **Logic Family** | CMOS 4000 Series | | **Logic Type** | Inverting Buffer (NOT Gate) | | **Number of Gates** | 6 (Hex) | | **Supply Voltage Range ($V_{DD}$)** | 3V to 18V | | **Input Voltage Range** | Can exceed $V_{DD}$ (High-to-Low level conversion) | | **Package Type** | TSSOP-16 (indicated by P16) | | **Operating Temperature** | -40°C to +125°C | --- ### 2. Key Features and Applications The UCD4049BL is unique compared to standard 4000 series chips due to its input structure. * **Logic Level Conversion:** One of its primary uses is converting high-level logic signals (e.g., 15V) down to lower levels (e.g., 5V) because the input voltage can safely exceed the supply voltage. * **High Current Drive:** These buffers are designed to have a higher current-sinking capability than standard CMOS gates, making them suitable for driving small loads or multiple CMOS inputs. * **Simple Oscillator Circuits:** Due to the high gain and inverting nature, they are frequently used in DIY electronics to create simple square-wave clock generators using a resistor and capacitor (RC circuit). --- ### 3. Pinout Configuration (TSSOP-16) The 4049 is "unusual" because it has two NC (No Connection) pins and specific power pins: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | $V_{DD}$ | Positive Supply Voltage | | **2, 4, 6, 10, 12, 15** | $G_1 - G_6$ | Outputs (Inverted) | | **3, 5, 7, 9, 11, 14** | $A_1 - A_6$ | Inputs | | **8** | $V_{SS}$ | Ground | | **13, 16** | NC | No Connection | --- ### 4. Part Number Breakdown The nomenclature usually follows this pattern: * **UCD**: Manufacturer code (often associated with Unisonic Technologies / UTC). * **4049**: Functional type (Hex Inverting Buffer). * **B**: Buffered output (improved noise immunity and drive). * **L**: Lead-free / RoHS compliant. * **P16**: TSSOP-16 Package. * **R**: Tape and Reel packaging. ---