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HD74HC423A

Hitachi Semiconductor
Part Number HD74HC423A
Manufacturer Hitachi Semiconductor
Description Dual Retriggerable Monostable Multivibrators
Published Mar 23, 2005
Detailed Description HD74HC423A Dual Retriggerable Monostable Multivibrators Description This multivibrator features output-pulse-duration c...
Datasheet PDF File HD74HC423A PDF File

HD74HC423A
HD74HC423A

Overview
HD74HC423A Dual Retriggerable Monostable Multivibrators Description This multivibrator features output-pulse-duration control by two methods.
The basic pulse duration is programmed by selection of external resistance and capacitance values.
Once triggered, the basic pulse duration 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.
The B input is a Schmitt trigger enabling jitter-free triggering from input signals with slow transition rates.
Features • • • • • High Speed Operation High Output Current: Fanout of 10 LSTTL Loads Wide Operating Voltage: VCC = 2 to 6 V Low Input Current: 1 µA max Low Quiescent Supply Current Function Table Inputs Clear L X X H H A X H X L H B X X L Output Q L L L Q H H H HD74HC423A Pin Arrangement 1A 1B 1CLR 1Q 2Q 2Cext 2Rext/Cect GND 1 2 3 4 5 6 7 8 CLR CLR 16 15 14 13 12 11 10 9 VCC 1Rext/Cext 1Cext 1Q 2Q 2CLR 2B 2A Logic diagram Rext Cext VCC VH VL OUT Q Q...


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