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74LS123 retriggerable monostable multivibrators


Retriggerable Monostable Multivibrators
* D-C Triggered from Active-High or Active-Low Gated Logic Inputs
* Retriggerable for Very Long Output Pulses, Up to 100% Duty Cycle
* Overriding Clear Terminates Output Pulse
These d-c triggered multivibrators feature output pulse-duration control by three methods. The basic pulse time is programmed by selection of external resistance and capacitance values (see typical application data). Once triggered, the basic pulse duration may be extended by retriggering the gated low-level-active (A) or high-level-active (B) inputs, or be reduced by use of the overriding clear.
'LS123 provides enough Schmitt hysteresis to ensure jitter-free triggering from the B input with transition rates as slow as 0.



74LS123 retriggerable monostable multivibrators