The SN74LV123AD is a dual retriggerable Monostable Multivibrator designed for 2 to 5.5V VCC operation. It features output pulse-duration control by three methods. In the first method, the A input is low and the B input goes high. In the second method, the B input is high and the A\ input goes low. In the third method, the A\ input is low, the B input is high and the clear (CLR/) input goes high. The output pulse duration is programmable by selecting external resistance and capacitance values. The external timing capacitor must be connected between Cext and Rext/Cext (positive) and an external resistor connected between Rext/Cext and VCC. To obtain variable pulse durations, connect an external variable resistance between Rext/Cext and VCC. The output pulse duration also can be reduced by taking CLR\ low.
● Support mixed-mode voltage operation on all ports
● Schmitt-trigger circuitry on A\, B and CLR\ inputs for slow input transition rates
● Edge triggered from active-high or active-low gated logic inputs
● Ioff Supports partial-power-down mode operation
● Retriggerable for very long output pulses, up to 100% duty cycle
● Overriding clear terminates output pulse
● Glitch-free power-up reset on outputs
● Latch-up performance exceeds 100mA per JESD 78, Class II
● Green product and no Sb/Br
