IC not available anymore

Parts Questions
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1

Hello,

i’ve got a small (i hope so) problem with parts i want to order at Reichelt.de.
The 74HCT 541 by Texas Instruments is not available any more, nor at reichelt or at mouser. For building a STM32F4, can one use 74HC 541 instead ?

Thanks in advance,

Martin

2

Depending on what you want to do you can leave it away completely.

What housing do you need? DIP or SMD?

3

Why dont you take those??

https://www.mouser.de/Semiconductors/Logic-ICs/_/N-4s5z6?P=1z0z63x&Keyword=hct541&Ns=Pricing%7c0&FS=True

4

upps, i think i didn’t find them at mouser. they have slightly different identifiers, but if you say i can use them all?

5

i need them for  DIP

6

You cannot substitute for HC logic in this case. HCT is required to level-shift the logic to +5V, whereas a 3v3 3V signal pushes the threshold limits of a HC chip powered at +5V.

595-SN74HCT541N should be suitable.

7

thank you all!