SN54LS122

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) 1ĂR ext/ V CC 16 C ext 15 1 C ext 14 1Q 13 2Q 12 2 CLR 2B 10 2A 9 16 1 N SUFFIX PLASTIC CASE 648-08 11 Q CLR Q CLR Q Q 16 1 6 2 7 2 R ext/ C ext 8 GND D SUFFIX SOIC CASE 751B-03 1 1A 2 1B 3 1 CLR 4 1Q 5 2Q C ext J SUFFIX CERAMIC CASE 632-08 14 1 SN54 / 74LS122 (TOP VIEW) (SEE NOTES 1 THRU 4) R ext/ V CC 14 C ext 13 NC 12 C ext 11 NC 10 R int 9 Q 8 R int Q 14 1 N SUFFIX PLASTIC CASE 646-06 CLR Q 1 A1 2 A2 3 B1 4 B2 5 CLR 6 Q 7 GND 14 1 D SUFFIX SOIC CASE 751A-02 NC Ċ NO INTERNAL CONNECTION. NOTES: 1. An external timing ca...