7402 NOR Gate IC DIP 14 pin

Technical Details

• Propagation Delay: ~10ns to 15ns.

• Operating Temperature: 0°C to +70°C.

• Pin Configuration: Pin 14 (VCC), Pin 7 (GND).

Prototyping and Engineering Tips from Robogears

• The "All Low" Logic: CRITICAL: Remember that a NOR gate output only goes HIGH when all inputs are LOW. This makes it exceptionally useful for "Zero-Detection" circuits or as an active-high trigger that only fires when a system is completely idle.

• Unique Pinout Warning: Unlike the 74LS08 (AND) or 74LS32 (OR), the 74LS02 has a different internal gate arrangement. Specifically, the Output for the first gate is on Pin 1, while the Inputs are on Pins 2 and 3. Always refer to the pinout diagram before wiring to avoid logic errors.

• Creating an SR Latch: You can create a basic memory element (Flip-Flop) by cross-coupling two NOR gates from this IC. This is the foundation of digital memory and debouncing switches.

• Avoid Floating Inputs: Never leave unused input pins floating. Floating pins act as antennas and can lead to erratic switching and increased power draw. Connect unused inputs to Ground (GND).

• Decoupling for Stability: High-speed logic transitions can cause "noise" on the power lines. Always place a 0.1µF Ceramic Capacitor between Pin 14 (VCC) and Pin 7 (GND) as close to the IC as possible to ensure clean switching.

Package Includes

• 1 x 74LS02 Quad 2-Input NOR Gate IC (DIP-14)

Disclaimer: Product images are shown for illustrative purposes only. The exact color of the knobs or the branding placement on the chassis may vary slightly between manufacturing batches, but all technical specifications and the 850A performance standards remain as described. This disclaimer also applies to any included accessories such as nozzles and stands.

Safety Warning: Ensure your power supply is regulated to a stable 5V. Voltages above 7V will cause permanent internal damage. Use the notch on the plastic body to correctly identify Pin 1 before applying power to prevent short circuits.