The LC7940KD and LC7941KDR are segment driver LSIs for driving large, dot-matrix LCD displays. They read 4-bit parallel or serial input, display data from a controller into an 80-bit latch, and then generate LCD drive signals corresponding to that data. The LC7940KD and LC7941KDR feature mirror-image pin assignments, allowing them to be used together to increase component density. They are designed to be used with the LC7942KD (QIP80D) common driver to drive large LCD panels.