DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT-TRIGGER INPUTS
●Each multivibrator of the LS221 features a negative-transition-triggered input and a positive-transition-triggered inputeither of which can be used as an inhibit input.
●Pulse triggering occurs at a voltage level and is not related to the transition time of the input pulse. Schmitt-trigger input circuitry for B input allows jitter-free triggering for inputs as slow as 1 volt/second, providing the circuit with excellent noise immunity. A high immunity to VCC noise is also provided by internal latching circuitry.
●• SN54LS221 and SN74LS221 is a Dual Highly Stable One-Shot
●• Overriding Clear Terminates Output Pulse
●• Pin Out is Identical to SN54/74LS123
Motorola
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Apex Microtechnology
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