7402 is a NOR gate IC, functionality is opposite to OR. the IC belongs to 74 series gate IC family. 7402 has 2 input NOR gate and 4 such circuits in one IC package. the IC has lead-14 pin DIP tube type package.
RoboElements has the original gate IC only. It is difficult to see either IC is original or not. But once maker uses the original one, they exactly know how different it is. original gate IC has more accurate output, more tolerance, and voltage bearing capacity. Buy 7402 Gate IC from RoboElements online across India.