## U74LVC1G08G-AF5-R: Technical Overview The **U74LVC1G08G-AF5-R** is a high-performance, low-voltage CMOS device. Specifically, it is a **2-input AND gate** housed in a small footprint package, commonly used in modern digital electronics for glue logic and signal conditioning. ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Logic Type** | AND Gate | | **Number of Inputs** | 2 | | **Operating Voltage (Vcc)** | 1.65V to 5.5V | | **Output Current (Ioh/Iol)** | ±32 mA (at 4.5V) | | **Propagation Delay** | ~3.6 ns (at 3.3V) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SOT-25 / SOT-23-5 (AF5) | | **Logic Family** | LVC (Low Voltage CMOS) | --- ### 2. Part Number Breakdown Understanding the nomenclature helps identify the physical and electrical characteristics: * **U74LVC**: Represents the logic family. "LVC" stands for Low Voltage CMOS, which is compatible with TTL levels. * **1G08**: The "1G" indicates a **single gate** device. "08" is the standard function code for an **AND gate**. * **G**: Typically indicates "Green" (Halogen-free and RoHS compliant). * **AF5**: Refers to the package code, specifically the **SOT-25** (also known as SOT-23-5). * **R**: Indicates **Tape & Reel** packaging for automated assembly. --- ### 3. Pin Configuration The SOT-25 package features 5 pins arranged as follows: | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1 | **A** | Data Input 1 | | 2 | **B** | Data Input 2 | | 3 | **GND** | Ground (0V) | | 4 | **Y** | Data Output (A • B) | | 5 | **Vcc** | Supply Voltage | --- ### 4. Logic Function The device performs the boolean function **Y = A • B**. The output is HIGH only when both inputs are HIGH. **Truth Table:** | Input A | Input B | Output Y | | :---: | :---: | :---: | | L | L | L | | L | H | L | | H | L | L | | H | H | H | --- ### 5. Notable Features * **Ioff Circuitry:** Supports partial-power-down mode operation. When Vcc is 0V, the inputs and outputs are high-impedance, preventing damaging backflow current. * **Overvoltage Tolerant Inputs:** Inputs can be driven by 5.5V even when the supply voltage is lower (e.g., 3.3V), making it an excellent **level shifter**. * **High Drive Capability:** Can source or sink up to 32mA, allowing it to drive LEDs or long transmission lines directly.