Triple 3-input Nor Gate - National Semiconductor

These NOR Gates MM54HC27 MM74HC27 utilize advanced silicon-gate CMOS tech- nology, to achieve operating speeds similar to LS-TTL Gates with the low power consumption of standard CMOS inte- grated circuits. All Gates have buffered outputs, providing 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 dis- charge by internal Diode clamps to VCC and ground. By National Semiconductor Corporation