The **U74LVC1G126L-AF5-R** is a high-performance, low-voltage CMOS device. It functions as a **single bus buffer gate** with a 3-state output, commonly used in modern electronics for signal isolation and level shifting. --- ### ## 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Logic Function** | Single Buffer/Line Driver (3-State) | | **Operating Voltage ($V_{CC}$)** | 1.65V to 5.5V | | **Output Current ($I_{OH}/I_{OL}$)** | ±24 mA (at 3.3V) | | **Propagation Delay** | ~3.5 ns (at 3.3V) | | **Package Type** | SOT-25 / SOT-23-5 (AF5) | | **Input Type** | Over-voltage tolerant (up to 5.5V) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### ## 2. Logic Symbol and Functionality The device features one independent buffer with a **High-level Output Enable (OE)**. * **Active State:** When OE is **HIGH**, the output ($Y$) follows the input ($A$). * **High-Impedance State:** When OE is **LOW**, the output enters a high-impedance state (Hi-Z), effectively disconnecting the line from the bus. #### ### Truth Table | Input (OE) | Input (A) | Output (Y) | | :---: | :---: | :---: | | H | H | H | | H | L | L | | L | X | Z (High Impedance) | --- ### ## 3. Part Number Breakdown Understanding the suffix codes for UTC (Unisonic Technologies Co.): * **U74LVC1G**: Part family (Low Voltage CMOS, Single Gate). * **126**: Function code (Bus buffer with 3-state output, active high enable). * **L**: Lead-free/Halogen-free plating. * **AF5**: Package code for **SOT-25**. * **R**: Packing style (**Tape & Reel**). --- ### ## 4. Common Applications Due to its wide voltage range and 5V tolerance, this part is ideal for: * **Signal Isolation:** Preventing noise or leakage between different circuit sections. * **Voltage Translation:** Interfacing between different logic levels (e.g., 1.8V logic to 3.3V logic). * **Bus Driving:** Strengthening weak signals to drive multiple loads on a data bus. * **I/O Expansion:** Enabling or disabling specific lines in MCU-based designs. ---