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DM74LS221

National Semiconductor
Part Number DM74LS221
Manufacturer National Semiconductor
Description Dual Non-Retriggerable One-Shot
Published Jun 23, 2016
Detailed Description DM74LS221 Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs February 1992 DM74LS221 Dual Non-Retrig...
Datasheet PDF File DM74LS221 PDF File

DM74LS221
DM74LS221

Overview
DM74LS221 Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs February 1992 DM74LS221 Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs General Description 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 allows jitter free triggering for inputs with transition rates as slow as 1 volt second This provides the input with excellent noise immunity Additionally an internal latching circuit at the input stage also provides a high immunity to VCC noise The clear (CLR) input can terminate the output pulse at a predetermined time independent of the timing components This (CLR) input also serves as a trigger input when it is pulsed with a low level pulse transition ( ) To obtain the best and trouble free operation...


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