54LS123 PDF Datasheet


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Description

This is SN54LS123. SN54, 74LS122 SN54, 74LS123 RETRIGGERABLE MONOSTABLE MULTIVIBRATORS 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 LS122 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. RETRIGGERABLE MONOSTABLE MULTIVIBRATORS LOW POWER SCHOTTKY 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 on LS122 16 1 J SUFFIX CERAMIC CASE 620-09 SN54 , 74LS123 (TOP VIEW) (SEE NOTES 1 THRU 4) 1 R V C ext, ext C 1 ext 1Q 2Q 2 CLR 2B .