The **U74LVC1G04L-AF5-R** is a high-performance, low-voltage CMOS single inverter gate. It is commonly manufactured by UTC (Unisonic Technologies Co., Ltd) and is a functional equivalent to the industry-standard 74LVC1G04. --- ### ## 1. Technical Specifications The table below summarizes the core electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Logic Function** | Inverter (NOT Gate) | | **Number of Channels** | 1 Channel | | **Supply Voltage ($V_{CC}$)** | 1.65V to 5.5V | | **Output Current ($I_{OH}/I_{OL}$)** | ±24 mA (at 3.0V) | | **Propagation Delay ($t_{pd}$)** | ~3.3 ns (at 3.3V) | | **Operating Temperature** | -40°C to +85°C | | **Package Type** | SOT-25 (AF5) | | **Packing** | Tape & Reel (R) | --- ### ## 2. Part Number Breakdown Understanding the nomenclature helps in identifying the specific variant: * **U74LVC**: UTC Series for Low Voltage CMOS logic. * **1G**: Denotes a "Single Gate" device. * **04**: Logic function (Inverter). * **L**: Lead-free/Halogen-free. * **AF5**: Package code for **SOT-25** (similar to SOT-23-5). * **R**: Packing type (Tape & Reel). --- ### ## 3. Pin Configuration The device typically follows the standard 5-pin layout for single gates: | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1 | NC | No Connection | | 2 | A | Data Input | | 3 | GND | Ground (0V) | | 4 | Y | Data Output (Inverted) | | 5 | $V_{CC}$ | Supply Voltage | --- ### ## 4. Key Features & Applications #### **Key Features** * **Overvoltage Tolerant Inputs:** Inputs can handle up to 5.5V regardless of the supply voltage ($V_{CC}$), making it excellent for voltage translation. * **Ioff Circuitry:** Supports partial power-down mode operation. When $V_{CC}=0V$, the inputs and outputs are high-impedance, preventing damaging backflow current. * **High Drive Capability:** Capable of driving heavy capacitive loads with ±24mA output current. #### **Common Applications** * **Signal Inversion:** Simply flipping a high signal to low or vice-versa. * **Pulse Shaping:** Cleaning up slow-rising digital signals. * **Voltage Level Shifting:** Translating a 5V logic signal down to a 3.3V system. * **Oscillators:** Used in simple RC or crystal oscillator circuits. --- ### ## 5. Truth Table The logic operation is represented as $Y = \bar{A}$. | Input (A) | Output (Y) | | :---: | :---: | | L | H | | H | L |