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HD74LV123A

Hitachi Semiconductor
Part Number HD74LV123A
Manufacturer Hitachi Semiconductor
Description Dual Retriggerable Monostable Multivibrators
Published Mar 23, 2005
Detailed Description HD74LV123A Dual Retriggerable Monostable Multivibrators ADE-205-258A (Z) 2nd Edition June 1999 Description The HD74LV12...
Datasheet PDF File HD74LV123A PDF File

HD74LV123A
HD74LV123A

Overview
HD74LV123A Dual Retriggerable Monostable Multivibrators ADE-205-258A (Z) 2nd Edition June 1999 Description The HD74LV123A 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 basic pulse duration is programmed 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.
Once triggered, the basic pulse duration can be extended by retriggering the gated low-level-active (A) or high-level-active (B) input.
Pulse duration can be reduced by taking CLR low.
Features • • • • VCC = 2.
0 V to 5.
5 V operation All in...


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