The **U74LVC1G00G-AF5-R** is a specific electronic component manufactured by UTC (Unisonic Technologies). It belongs to the **LVC** (Low Voltage CMOS) logic family and serves a fundamental role in digital circuitry. --- ### 1. General Identification | Parameter | Description | | :--- | :--- | | **Part Number** | U74LVC1G00G-AF5-R | | **Logic Function** | 2-Input NAND Gate | | **Package Type** | SOT-25 (or SOT-23-5) | | **Mounting Type** | Surface Mount (SMD) | | **Logic Family** | Low Voltage CMOS (LVC) | --- ### 2. Key Technical Specifications The "LVC" designation indicates that this part is designed for high-speed, low-voltage operation with high output drive capability. * **Operating Voltage ($V_{CC}$):** 1.65V to 5.5V (Supports 1.8V, 2.5V, 3.3V, and 5V systems). * **Output Drive Strength:** Up to ±24mA at 3.3V. * **Propagation Delay:** Very fast, typically around 3.3ns to 4ns (at 3.3V). * **Input Tolerance:** Inputs are 5V tolerant even when $V_{CC}$ is lower (e.g., 3.3V), making it excellent for **level shifting**. * **Power-Off Isolation ($I_{off}$):** Supports partial-power-down mode operation. --- ### 3. Pin Configuration (SOT-25) Standard 5-pin layout for a single-gate NAND: | Pin Number | Symbol | Function | | :--- | :--- | :--- | | 1 | **A** | Logic Input 1 | | 2 | **B** | Logic Input 2 | | 3 | **GND** | Ground | | 4 | **Y** | Logic Output ($\overline{A \cdot B}$) | | 5 | **VCC** | Power Supply | --- ### 4. Logic Table (NAND Operation) The NAND gate produces a LOW output only when both inputs are HIGH. | Input A | Input B | Output Y | | :---: | :---: | :---: | | L | L | **H** | | L | H | **H** | | H | L | **H** | | H | H | **L** | --- ### 5. Part Number Decoding (UTC Naming Convention) * **U74LVC**: Logic Series (Low Voltage CMOS). * **1G00**: Single (1G) 2-Input NAND Gate (00). * **G**: Halogen-free and Lead-free (Green). * **AF5**: Package code for SOT-25. * **R**: Tape and Reel packaging. --- ### 6. Common Applications * **Signal Gating:** Enabling or disabling a signal path based on a control bit. * **Level Translation:** Interfacing between a 3.3V MCU and a 5V peripheral. * **Logic Inversion:** If pins A and B are tied together, it acts as a NOT gate (Inverter). * **Industrial/Mobile Electronics:** Due to the small footprint and low power consumption. ---