These logic gates employ complementary MOS (CMOS) to achieve wide power supply operating range low power consumption high noise immunity and symmetric controlled rise and fall times With features such as this the 54C 74C logic family is close to ideal for use in digital systems Function and pin out compatibility with series 54 74 devices minimizes design time for those designers already familiar with the standard 54 74 logic family All inputs are protected from damage due to static discharge by diode clamps to VCC and GND