## U74ACT14-S14-R: Electronic Specifications and Overview The **U74ACT14-S14-R** is a high-speed CMOS logic integrated circuit. Specifically, it consists of **six independent Hex Inverting Schmitt Triggers**. It is designed to convert slowly changing input signals into sharply defined, jitter-free output signals. --- ### 1. Key Technical Specifications Below are the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Logic Type** | Hex Inverter with Schmitt Trigger | | **Technology** | ACT (Advanced CMOS with TTL-compatible inputs) | | **Supply Voltage (Vcc)** | 4.5V to 5.5V | | **Output Current (Ioh/Iol)** | ±24 mA | | **Package Type** | SOP-14 (Small Outline Package) | | **Number of Gates** | 6 | | **Input Threshold** | Hysteresis (typically 0.8V to 1.2V) | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Functional Features * **Schmitt Trigger Action:** Each of the six inverters has a hysteresis effect. This means the threshold for a "low-to-high" transition is higher than the threshold for a "high-to-low" transition, making it immune to input noise. * **TTL Compatibility:** The "ACT" designation indicates that the input logic levels are compatible with standard TTL (Transistor-Transistor Logic) components, even though the internal structure is CMOS. * **High Speed:** It offers propagation delays comparable to bipolar Schottky TTL while maintaining the low power consumption of CMOS technology. --- ### 3. Pin Configuration (SOP-14) The device follows a standard pinout for Hex Inverters: | Pin Number | Function | Description | | :--- | :--- | :--- | | 1, 3, 5, 9, 11, 13 | **1A - 6A** | Data Inputs | | 2, 4, 6, 8, 10, 12 | **1Y - 6Y** | Data Outputs (Inverted) | | 7 | **GND** | Ground (0V) | | 14 | **Vcc** | Power Supply (5V) | --- ### 4. Typical Applications * **Line Receivers:** Transforming noisy signals from long cables into clean digital square waves. * **Pulse Shapers:** Converting sine waves or slow-rising pulses into sharp logic transitions. * **Oscillators:** Can be used with an RC network to create simple relaxation oscillators. * **Debouncing:** Cleaning up signals from mechanical switches. --- ### 5. Part Number Breakdown * **U74:** Manufacturer/Series code (Unisonic Technologies - UTC). * **ACT:** Advanced CMOS with TTL-compatible inputs. * **14:** Function code for Hex Schmitt-Trigger Inverter. * **S14:** Refers to the SOP-14 package type. * **R:** Indicates "Tape and Reel" packaging for automated assembly.