描述 Description

The CD54AC299/3A and CD54ACT299/3A are three-state, 8-input universal shift/storage registers with common parallel I/O pins. These devices utilize the Harris Advanced CMOS Logic technology. These registers have four synchronous operating modes controlled by the two select inputs as shown in the Mode Select (S0, S1) table. The Mode Select, the Serial Data (DS0, DS7), and the Parallel Data (I/O0 - I/O7) respond only to the LOW-to-HIGH transition of the clock pulse (CP). S0, S1 and Data inputs must be present one setup time prior to the positive transition of the clock.