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  1. IC 7402 Chip: Pin Diagram, Truth table and Datasheet - ntchip.com

  2. 7402 - 7402 Quad 2-Input NOR Gate Datasheet - Futurlec

  3. Understanding the Pin Diagram of IC 7402 - WireBlueprint.com

  4. 74LS02 NOR Gate IC, pinout, features, example and datasheet

  5. 74LS02 – Quadruple Two Input NOR Gate IC - Components101

  6. 7402 Datasheet (PDF) - Fairchild Semiconductor

  7. 7400 Series Guide: 74LS02/74HC02 (NOR gates) - Build Electronic …

  8. 7402 Datasheet – Everything You Need to Know - Diagram Library