The M74HC77 is an high speed CMOS 4 BIT D TYPE LATCH fabricated with silicon gate C2MOS technology.
It contains two groups of 2 bit latches controlled by an enable input (G1•2 or G3•4). These two latch groups can be used in different circuits. The data applied to the data inputs (1D, 2D, or 3D, 4D) are transferred to the Q outputs (1Q, 2Q, or 3Q, 4Q) respectively when the enable input (G1•2 or G3•4) is taken high. The Q outputs will follow the data inputs as