### Overview of U74ACT86L-S14-R The **U74ACT86L-S14-R** is a high-speed CMOS integrated circuit consisting of four independent 2-input **Exclusive-OR (XOR) gates**. It belongs to the "ACT" family, which means it utilizes advanced CMOS technology while maintaining TTL-compatible input thresholds. --- ### 1. Key Technical Specifications | Parameter | Value / Description | | :--- | :--- | | **Logic Type** | XOR (Exclusive OR) | | **Number of Circuits** | 4 (Quadruple) | | **Number of Inputs** | 2 per gate | | **Logic Family** | ACT (Advanced CMOS with TTL levels) | | **Operating Supply Voltage** | 4.5V to 5.5V | | **Output Current (High/Low)** | -24mA / 24mA | | **Propagation Delay** | ~5.0ns (at 5V) | | **Operating Temperature** | -40°C to +85°C | | **Package Type** | SOP-14 (Small Outline Package) | --- ### 2. Logic Function The XOR gate follows a specific truth table where the output is **HIGH (1)** only when the inputs are different. **Truth Table (Per Gate):** | Input A | Input B | Output Y | | :---: | :---: | :---: | | L | L | L | | L | H | H | | H | L | H | | H | H | L | --- ### 3. Pin Configuration (SOP-14) The device typically follows the standard pinout for Quad 2-input XOR gates: 1. **1A**: Input 1, Gate 1 2. **1B**: Input 2, Gate 1 3. **1Y**: Output, Gate 1 4. **2A**: Input 1, Gate 2 5. **2B**: Input 2, Gate 2 6. **2Y**: Output, Gate 2 7. **GND**: Ground (0V) 8. **3Y**: Output, Gate 3 9. **3A**: Input 1, Gate 3 10. **3B**: Input 2, Gate 3 11. **4Y**: Output, Gate 4 12. **4A**: Input 1, Gate 4 13. **4B**: Input 2, Gate 4 14. **Vcc**: Positive Supply (5V) --- ### 4. Part Number Decoding Understanding the suffix helps in identifying the exact variant: * **U74**: Unisonic Technologies (UTC) Prefix. * **ACT**: Advanced CMOS Logic with TTL-compatible inputs. * **86**: Logic function code (Quad 2-Input XOR). * **L**: Lead-free/Halogen-free. * **S14**: SOP-14 Package. * **R**: Tape and Reel packaging. --- ### 5. Common Applications * **Parity Generators/Checkers:** Used to detect errors in digital data transmission. * **Adders/Subtractors:** The XOR gate is the fundamental building block for Half-Adders and Full-Adders. * **Phase Comparators:** Used in Phase-Locked Loops (PLLs). * **Data Encryption:** Basic XOR-based ciphering for simple logic security. ---