These dc triggered multivibrators feature pulse width control by three methods. The basic pulse width is programmed by selection of external resistance and capacitance values. The 74LS122 has an internal
timing resistor that allows the circuits to be used with only an external capacitor. Once triggered, the basic pulse width 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.
Overriding Clear Terminates Output Pulse
Compensated for VCC and Temperature Variations
DC Triggered from Active-High or Active-Low Gated Logic Inputs
Retriggerable for Very Long Output Pulses, up to 100% Duty Cycle
Internal Timing Resistors
14 pin DIP. Actual brand may vary from picture.