Overview: DATA SHEET .onsemi. Quad 2-Input NOR Gate
MC74VHC02, MC74VHCT02A
The MC74VHC02 and MC74VHCT02A are high speed CMOS quad 2−input NOR gates fabricated with silicon gate CMOS technology. These achieve high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation.
The MC74VHC02 inputs are patible with standard CMOS levels while the MC74VHCT02A inputs are patible with TTL levels. This device can be used as a level converter for interfacing 3.3 V to 5.0 V, because it has full 5.0 V CMOS level output swings.
The MC74VHC02 and MC74VHCT02A internal circuits are posed of three stages, including a buffer output which provides high noise immunity and stable output. The input structures tolerate voltages up to 5.5 V, allowing the interface of 5 V systems to 3 V systems.
The MC74VHCT02A output structures provide protection when VCC = 0 V. These output structures help prevent device destruction caused by supply voltage − input/output voltage mismatch, battery backup, hot insertion, etc.
