The MC74VHC574 is an advanced high speed CMOS octal flipflip with 3state output fabricated with silicon gate CMOS technology. It achieves high speed operation similar to equivalent Bipolar Schottky TTL while maintaining CMOS low power dissipation. This 8bit Dtype flipflop is controlled by a clock input and an output enable input. When the output enable input is high, the eight outputs are in a high impedance state.