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74HC42 pdf datasheet
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2008-08-06
彭友旺
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MM54HC42/MM74HC42
BCD-to-Decimal Decoder
General Description
This decoder utilizes advanced silicon-gate CMOS technology.
Data on the four input pins select one of the 10 outputs
corresponding to the value of the BCD number on the inputs.
An output will go low when selected, otherwise it remains
high. If the input data is not a valid BCD number all
outputs will remain high. The circuit has high noise immunity
and low power consumption usually associated with CMOS
circuitry, yet also has speeds comparable to low power
Schottky TTL (LS-TTL) circuits, and is capable of driving 10
LS-TTL equivalent loads.
BCD-to-Decimal Decoder
General Description
This decoder utilizes advanced silicon-gate CMOS technology.
Data on the four input pins select one of the 10 outputs
corresponding to the value of the BCD number on the inputs.
An output will go low when selected, otherwise it remains
high. If the input data is not a valid BCD number all
outputs will remain high. The circuit has high noise immunity
and low power consumption usually associated with CMOS
circuitry, yet also has speeds comparable to low power
Schottky TTL (LS-TTL) circuits, and is capable of driving 10
LS-TTL equivalent loads.
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