Digital logic, amplifier, calculation, memory, radio frequency and video use, signal changing, signal route and adjusting, use regularly, the power control ¡¡Integrated circuit of semiconductor. The prefixes of the part include 74,40, 65,75, LM, AD, MAX, AT, BA, DS, LT, MC, SN, OP, TC, X, SAA,UC, UCC, BQ and so on¡£