DM74LS221 - Dual Non-Retriggerable One-Shot

National Semiconductor

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Datasheet Details

Part number: DM74LS221
Manufacturer: National Semiconductor
File Size: 130.10 KB
Datasheet: DM74LS221-NationalSemiconductor.pdf
Description: Dual Non-Retriggerable One-Shot

DM74LS221 Product details

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 a.

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 input Y DTL TTL compatible Y Input clamp diodes Note 1 The pin-out is identical to ’LS123 but functionally it is not refer to Operating Rules 10 in this datasheet Functional.

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Dual Non-Retriggerable One-Shot National Semiconductor

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