The **U74LVC34AL-S14-R** is a high-performance, low-voltage CMOS logic integrated circuit. It consists of six independent buffers (non-inverting) and is widely used in digital systems for signal buffering and voltage level shifting. --- ### 1. General Specifications | Feature | Details | |:---|:---| | **Logic Type** | Hex Buffer / Non-Inverting | | **Technology** | Low-Voltage CMOS (LVC) | | **Package Type** | SOP-14 (Small Outline Package) | | **Operating Voltage ($V_{CC}$)** | 1.65V to 3.6V | | **Input Tolerance** | Up to 5.5V (allows 5V to 3.3V translation) | | **Output Drive ($I_{OH}/I_{OL}$)** | ±24 mA at 3.0V | --- ### 2. Key Features and Functions * **Hex Configuration:** The "Hex" designation means there are six individual buffer circuits contained within a single 14-pin chip. * **Voltage Translation:** The inputs are 5.5V tolerant. This means you can feed a 5V signal into the chip even if the chip itself is powered by 3.3V, making it an excellent **downward level shifter**. * **Low Power Consumption:** As part of the LVC family, it features very low static power consumption, making it ideal for battery-operated devices. * **High Speed:** It offers low propagation delay (typically around 3.5ns at 3.3V), suitable for high-speed data paths. --- ### 3. Pin Configuration (SOP-14) The device follows a standard layout for hex buffers: | Pin Number | Symbol | Description | |:---:|:---:|:---| | 1, 3, 5, 9, 11, 13 | 1A - 6A | Data Inputs (1 through 6) | | 2, 4, 6, 8, 10, 12 | 1Y - 6Y | Data Outputs (1 through 6) | | 7 | GND | Ground (0V) | | 14 | $V_{CC}$ | Supply Voltage | --- ### 4. Part Number Breakdown The nomenclature provides specific details about the component's manufacturing and packaging: * **U74LVC**: Logic family (Low Voltage CMOS). * **34**: Device function (Hex Buffer). * **AL**: Version/Revision code (Lead-free/Halogen-free). * **S14**: Package code (SOP-14). * **R**: Packing style (Tape & Reel). --- ### 5. Application Examples * **Signal Isolation:** Used to isolate sensitive MCU pins from external loads. * **Driving High Loads:** Providing the necessary current to drive LEDs or long PCB traces. * **Voltage Logic Matching:** Interfacing a 5V microcontroller with a 3.3V memory module or sensor.