technology to achieve operating speeds similar to LS-TTL gates with the low power consumption of standard CMOS integrated circuits. All gates have buffered outputs. All devices have high noise immunity and the ability to drive 10 LS-TTL loads. The 54HC/74HC logic family is functionally as well as pin-out compatible with the standard 54LS/74LS logic family. All inputs are protected from damage due to static discharge by internal diode clamps to VCC and ground. As with standard 54HC/74HC push-pull outputs there are diodes to both VCC and ground. Therefore the output should not be pulled above VCC as it would be clamped to one diode voltage above VCC. This diode is added to enhance electrostatic protection.