TTL Logic 74LS Series SMD

Jameco Electronics carries a wide selection of TTL logic 74LS series SMD devices designed for tons of applications. The 221 and LS221 devices are monolithic dual multivibrators with performance characteristics virtually identical to those of the 121 devices. Each multivibrator features a negative-transitiontriggered input and a positive-transition-triggered input, either of which can be used as an inhibit input.