The **U74LVC1G09L-AE5-R** is a high-performance, low-voltage CMOS logic gate. Specifically, it is a **Single 2-Input AND Gate with an Open-Drain Output**. Below is a detailed breakdown of its electronic characteristics and specifications. --- ### 1. Key Functional Specifications This device belongs to the **LVC (Low-Voltage CMOS)** family, designed for high-speed operation with minimal power consumption. | Feature | Specification | | :--- | :--- | | **Logic Function** | 2-Input AND Gate | | **Output Type** | **Open-Drain** (Requires an external pull-up resistor) | | **Operating Voltage ($V_{CC}$)** | 1.65V to 5.5V | | **Input Threshold** | TTL/CMOS Compatible | | **Output Current ($I_{OL}$)** | 32mA (at 4.5V) | | **Package Type** | SOT-23-5 (indicated by "AE5" suffix) | --- ### 2. Pin Configuration (SOT-23-5) The device typically follows the standard 5-pin logic layout: | Pin Number | Name | Description | | :--- | :---: | :--- | | 1 | **A** | Data Input A | | 2 | **B** | Data Input B | | 3 | **GND** | Ground (0V) | | 4 | **Y** | Output (Open-Drain) | | 5 | **Vcc** | Power Supply | --- ### 3. Electronic Characteristics #### A. Open-Drain Output Unlike a standard push-pull output, this part can only pull the output to **Low (GND)**. To achieve a **High** state, an external pull-up resistor must be connected between pin 4 (Y) and the desired voltage level ($V_{pull-up}$). This allows for: * **Level Shifting:** The pull-up voltage can be different from $V_{CC}$. * **Wired-AND Logic:** Multiple open-drain outputs can be connected together. #### B. Overvoltage Tolerance The inputs are designed to be "5V tolerant." This means you can apply a 5V signal to the inputs even if the chip is powered by a 3.3V supply, making it excellent for mixed-voltage systems. #### C. $I_{off}$ Circuitry This part supports **partial-power-down mode** ($I_{off}$). When the device is powered down ($V_{CC} = 0V$), the inputs and outputs are high-impedance, preventing damaging backflow current into the device. --- ### 4. Typical Applications * **Voltage Level Translation:** Converting a 1.8V logic signal to a 5V signal using the open-drain pull-up. * **System Reset Circuits:** Combining multiple "Active Low" reset signals. * **LED Drivers:** Using the 32mA sink current capability to drive small indicator LEDs. ---