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Topic: 8 shift registers and beyond (Read 828 times) previous topic - next topic

CrossRoads

I'd suggest a part like SN74AC541, with 24mA drive current. Very quick on propagation delay.
Family type is important. (vs CD74AC541, really slow propagation delay)
https://www.digikey.com/product-detail/en/texas-instruments/SN74AC241N/296-4308-5-ND/375881
Designing & building electrical circuits for over 25 years.  Screw Shield for Mega/Due/Uno,  Bobuino with ATMega1284P, & other '328P & '1284P creations & offerings at  my website.

Grumpy_Mike

So your saying, for example, on a hex buffer feed the sck into one buffer, then the output of that buffer to the input of the remaining 5. Use those 5 outputs to drive the 20 shift registers in groups of 4?

This would mean 2 hex buffers are required, 1 for sck and 1 for latch.
Am I understanding that correctly?
Yes.
Or just use one 74xx04 and feed one Arduino output to one buffer and the output of that to two others. That uses half the chip. Repeat for the other signal, then you have enough to drive two lots of 20 shift registers.

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