DM74LS221 Datasheet - National Semiconductor

DM74LS221 Dual Non-Retriggerable One-Shot

The DM74LS221 is a dual monostable multivibrator with Schmitt-trigger input Each device has three inputs permitting the choice of either leading-edge or trailing-edge triggering Pin (A) is an active-low trigger transition input and pin (B) is an active-high transition Schmitt-trigger input that allo.

DM74LS221 Features

* Y A dual highly stable one-shot Y Compensated for VCC and temperature variations Y Pin-out identical to ’LS123 (Note 1) Y Output pulse width range from 30 ns to 70 seconds Y Hysteresis provided at (B) input for added noise immunity Y Direct reset terminates output pulse Y Triggerable from CLEAR inp

DM74LS221-NationalSemiconductor.pdf