The **U74LVC1G125G-AF5-R** is a high-performance, low-voltage CMOS device. It functions as a **single bus buffer gate with a 3-state output**. This specific part is widely used in modern electronics for signal buffering and level shifting. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Logic Type** | Buffer/Line Driver, Non-Inverting | | **Number of Elements** | 1 | | **Operating Voltage (Vcc)** | 1.65V to 5.5V | | **Output Current (High/Low)** | 32mA / 32mA (at 4.5V) | | **Propagation Delay** | ~3.7ns (at 3.3V) | | **Operating Temperature** | -40°C to +125°C | | **Package Type** | SOT-25 / SOT-23-5 (AF5) | | **Output State** | 3-State (High Impedance when disabled) | --- ### 2. Pin Configuration and Functions The device typically comes in a 5-pin package. The functionality of each pin is described below: | Pin Number | Name | Description | | :---: | :--- | :--- | | 1 | **OE** | Output Enable (Active LOW) | | 2 | **A** | Data Input | | 3 | **GND** | Ground | | 4 | **Y** | Data Output | | 5 | **Vcc** | Supply Voltage | --- ### 3. Functional Logic The U74LVC1G125 features a "3-state" output controlled by the Output Enable ($\overline{OE}$) pin. * **When $\overline{OE}$ is LOW (L):** The output **Y** follows the input **A**. * **When $\overline{OE}$ is HIGH (H):** The output **Y** enters a high-impedance state (Hi-Z), effectively disconnecting it from the bus. --- ### 4. Special Features * **$I_{off}$ Support:** Supports partial-power-down mode. When the device is powered down, the inputs and outputs are disabled, preventing damaging backflow current. * **Overvoltage Tolerance:** Inputs are tolerant up to 5.5V, regardless of the supply voltage, allowing the chip to act as a **logic-level translator** (e.g., converting 5V signals down to 3.3V). * **Low Power Consumption:** Ideal for battery-operated handheld devices. --- ### 5. Part Number Breakdown The suffixing provides information about the packaging and manufacturing: * **U74LVC1G125**: Base functional part number. * **G**: Halogen-free and RoHS compliant. * **AF5**: Refers to the SOT-25 package style. * **R**: Tape and Reel packaging for automated assembly.