The **U74AHC1G08L-AF5-R** is a high-speed, low-voltage CMOS logic gate manufactured by Unisonic Technologies (UTC). Specifically, it is a single 2-input POSITIVE-AND gate. --- ### ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Logic Type** | AND Gate | | **Number of Circuits** | 1 | | **Number of Inputs** | 2 | | **Supply Voltage (Vcc)** | 2.0V to 5.5V | | **Operating Temperature** | -40°C to +85°C | | **Package Type** | SOT-25 / SOT-23-5 (AF5) | | **Output Current** | ±8 mA (at 5V) | | **Propagation Delay** | ~7.9 ns (at 5V, 50pF load) | --- ### ## Pin Configuration The device typically comes in an **AF5 (SOT-25)** package. The pinout is standard for single-gate logic: 1. **Pin 1 (B):** Input B 2. **Pin 2 (A):** Input A 3. **Pin 3 (GND):** Ground 4. **Pin 4 (Y):** Output ($Y = A \cdot B$) 5. **Pin 5 (Vcc):** Supply Voltage --- ### ## Key Features * **High Speed:** Advanced High-Speed CMOS (AHC) technology allows for performance comparable to bipolar Schottky TTL while maintaining CMOS low power consumption. * **Low Power Consumption:** Static power consumption is extremely low (Max $I_{cc} = 1\mu A$). * **Input Hysteresis:** Provides improved noise immunity for slower-changing input signals. * **Overvoltage Tolerance:** The inputs are tolerant to voltages up to 5.5V, regardless of the supply voltage ($V_{cc}$), making it ideal for mixed-voltage (3.3V to 5V) level translation tasks. --- ### ## Logic Table The AND gate output is "High" only when both inputs are "High." | Input A | Input B | Output Y | | :---: | :---: | :---: | | L | L | L | | L | H | L | | H | L | L | | H | H | H | --- ### ## Applications * **Signal Gating:** Used to enable or disable a signal path based on a control bit. * **Edge Detection:** Used in conjunction with RC circuits to detect pulses. * **Voltage Level Shifting:** Down-shifting 5V signals to 3.3V logic levels. * **Industrial Electronics:** Used in compact consumer devices, mobile phones, and portable healthcare equipment due to its tiny footprint.