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How this ic work?
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nhdyhh:
hello
How this ic work in led display?

https://assets.nexperia.com/documents/data-sheet/74HC_HCT04.pdf
http://www.ti.com/lit/ds/symlink/cd74hc595.pdf
Rerouter:
You really need to improve your question

The 74HC595 chip is a shift-register, you feed it serial data, and it produces a parrellel output, likely used in an LED display to drive a large number of LED's from a small number of microcontroller pins

The 74HC04 is an inverter chip, logic high becomes logic low, and vice-vesa, It again can be used to drive an LED that would draw more current than a microcontroller may be able to provide.
Rerouter:
Sounds like your asking for there "Equivalent Circuits", or the parasitic information on the inputs and outputs?

for the 595, look on page 9, If you need it broken down further, it gets more manufacturer dependent.  https://www.onsemi.cn/PowerSolutions/document/MC74HC595-D.PDF

for the 74hc04, well this is very manufacture and series dependand, a good starting point would be this page, http://www.piclist.com/images/www/hobby_elec/e_sampl1_1.htm
ebastler:
 :-//
agehall:
Sounds like it didn't take SDBFG long to register a new account...  :-DD  |O
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