The **U74LVC1G07G-AF5-R** is a high-performance CMOS logic device. Specifically, it is a **single-gate buffer with an open-drain output**. It belongs to the Low-Voltage CMOS (LVC) family, which is designed for high-speed, low-voltage applications. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Logic Type** | Buffer / Driver (Non-Inverting) | | **Output Type** | Open-Drain | | **Number of Gates** | 1 | | **Operating Voltage ($V_{CC}$)** | 1.65V to 5.5V | | **Output Current ($I_{OL}$)** | 32mA (at 4.5V) | | **Package Type** | SOT-25 / SOT-23-5 | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Functional Characteristics #### Open-Drain Architecture Unlike a standard push-pull output, an open-drain output can only pull the signal to **Low (Ground)**. To achieve a **High** state, an external pull-up resistor must be connected to the output pin. This allows for: * **Voltage Level Shifting:** You can pull the output to a higher or lower voltage than the chip's $V_{CC}$ (up to 5.5V). * **Wired-AND Logic:** Multiple open-drain outputs can be connected together on a single bus. #### Ioff Protection This device supports "Partial-Power-Down" mode. When the device is powered down ($V_{CC} = 0V$), the inputs and outputs are disabled, preventing current backflow that could damage the circuit. --- ### 3. Pin Configuration (SOT-25) | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1 | NC | No Connection | | 2 | A | Data Input | | 3 | GND | Ground | | 4 | Y | Data Output (Open-Drain) | | 5 | $V_{CC}$ | Supply Voltage | --- ### 4. Typical Applications * **LED Drivers:** Directly sinking current to drive small indicator LEDs. * **Level Translation:** Converting a 1.8V logic signal to a 5V signal (using a 5V pull-up). * **Bus Driving:** Used in $I^2C$ or other open-collector bus architectures. * **Logic Buffering:** Providing high current drive capability for weak signals. ---