NXP 74HCT27PW 或非门, HCT系列, 3门, 3输入, 4 mA, 4.5V至5.5V, TSSOP-14
The is a triple 3-input NOR Gate with TTL input switching levels. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.