The SL74HC393 is a dual 4-bit binary ripple counter with parallel outputs from each counter stage. Its outputs directly interface to CMOS, NMOS, and TTL, with an operating voltage range of 2.0 to 6.0V and a low input current of 1.0µA. It also has the high noise immunity characteristic of CMOS devices.
The SL74HC393 is a dual 4‑stage binary ripple counter with identical pinout to the LS/ALS393. It offers two independent 4‑bit counters that can be cascaded for a 256‑count sequence. The device features CMOS, NMOS, and TTL compatible outputs and includes protection against static discharge.
The datasheet details maximum ratings, recommended operating conditions, DC and AC electrical characteristics, timing requirements, pin assignments, functional tables, and timing diagrams to aid designers in proper implementation.
The SL74HC393 is identical in pinout to the LS/ALS393.