The **U74ACT32L-S14-R** is a high-speed CMOS logic integrated circuit. Specifically, it is a **Quadruple 2-Input OR Gate**. This device belongs to the "ACT" logic family, which is designed to be compatible with TTL (Transistor-Transistor Logic) input levels while maintaining CMOS power efficiency. --- ### 1. Technical Specifications Below are the primary electrical and physical parameters for the component: | Parameter | Specification | | :--- | :--- | | **Logic Type** | OR Gate | | **Number of Circuits** | 4 (Quad) | | **Number of Inputs** | 2 per gate | | **Logic Family** | ACT (Advanced CMOS, TTL Compatible) | | **Operating Voltage ($V_{CC}$)** | 4.5V to 5.5V | | **Output Current ($I_{OH}/I_{OL}$)** | ±24 mA | | **Propagation Delay** | ~8.0 ns (at 5V) | | **Package Type** | SOP-14 (Small Outline Package) | | **Mounting Type** | Surface Mount (SMD/SMT) | --- ### 2. Logic Function The device performs the Boolean function $Y = A + B$. In an OR gate, the output is **HIGH** if at least one of the inputs is HIGH. **Truth Table (Per Gate):** | Input A | Input B | Output Y | | :---: | :---: | :---: | | L | L | L | | L | H | H | | H | L | H | | H | H | H | --- ### 3. Part Number Breakdown The suffixing and prefixing provide specific details about the manufacturing and packaging: * **U74**: UTC (Unisonic Technologies Co.) Prefix. * **ACT**: Advanced CMOS with TTL-compatible inputs. * **32**: Device function (OR Gate). * **L**: Lead-free (RoHS compliant). * **S14**: SOP-14 Package (14 pins). * **R**: Tape and Reel packaging. --- ### 4. Key Features & Applications * **TTL Compatibility:** The "ACT" designation means it can interface directly with 5V TTL systems because its input threshold levels are matched to TTL standards ($V_{IL}=0.8V, V_{IH}=2.0V$). * **High Drive Capability:** The ±24mA output drive allows it to drive transmission lines or multiple logic loads without significant signal degradation. * **Common Applications:** * Signal gating and combining. * Digital logic glue (connecting different ICs). * Industrial control systems. * Consumer electronics logic processing. ---