The **U74ACT04G-P14-R** is a high-speed CMOS logic integrated circuit. Specifically, it consists of **six independent inverters** (hex inverters). It is part of the "ACT" logic family, which means it uses CMOS technology but has TTL-compatible input logic levels. --- ### 1. General Specifications | Feature | Details | | :--- | :--- | | **Logic Function** | Hex Inverter (6 Channels) | | **Logic Family** | ACT (Advanced CMOS with TTL-compatible inputs) | | **Package Type** | TSSOP-14 (Thin Shrink Small Outline Package) | | **Operating Voltage ($V_{CC}$)** | 4.5V to 5.5V | | **Output Current ($I_{OH}/I_{OL}$)** | ±24 mA | | **Propagation Delay** | ~5ns to 8.5ns (at 5V) | --- ### 2. Pin Configuration (TSSOP-14) The device contains 14 pins, housing six identical inverter gates. | Pin Number | Symbol | Description | | :--- | :--- | :--- | | 1, 3, 5, 9, 11, 13 | 1A to 6A | Data Inputs | | 2, 4, 6, 8, 10, 12 | 1Y to 6Y | Data Outputs (Inverted) | | 7 | GND | Ground (0V) | | 14 | $V_{CC}$ | Power Supply (Typically 5V) | --- ### 3. Key Electronic Characteristics * **Inversion Logic:** The core function follows the Boolean equation $Y = \bar{A}$. If the input is HIGH, the output is LOW, and vice versa. * **TTL Compatibility:** Unlike the standard 74HC series, the 74ACT series features input thresholds designed to interface directly with TTL outputs (0.8V for Low, 2.0V for High) while operating at CMOS voltage levels. * **High Drive Capability:** With a 24mA drive current, this chip can handle significantly higher loads than standard CMOS chips, making it useful for driving LEDs or transmission lines. * **Low Power Consumption:** Being CMOS-based, it consumes very little power when in a static (non-switching) state. --- ### 4. Part Number Breakdown * **U74:** Manufacturer prefix (often associated with Unisonic Technologies - UTC). * **ACT:** Logic Family (Advanced CMOS, TTL-compatible). * **04:** Device Function (Hex Inverter). * **G:** Halogen-free and RoHS compliant. * **P14:** Package Code (TSSOP-14). * **R:** Packing Code (Tape & Reel). --- ### 5. Applications * **Signal Inversion:** Flipping logic states in digital circuits. * **Oscillators:** Creating clock signals using RC or crystal circuits. * **Pulse Shaping:** Cleaning up slow-rising edges of digital signals. * **Level Shifting:** Interfacing different logic families operating at 5V.