control 7 digital switch with minimum pins

[Anoat]

Good morning all,

I need help with my synthesizer project.

To control by MIDI the different analog switches of the synthesizers, I replaced them with digital switches (DG444 and MAX333ACWP). To control the snumeric switches, all you need is a high or low signal.
I had planned to fly them with 7 chain of shift register 74hc595 controlled by the SPI.

However, I wonder if this solution is good and if there is no better solution?

Is there a 16-channel shift register for the Teensy?

Sincerely Anoat

[KurtE]

I could be wrong, as I have not used one of these in a long while, but if you need 16 bits, you can simply use 2 of the 74hc595 to each other and connect the input of one of them to the output of the other... But again it has been a long time since I have done that.

[Anoat]

In fact, that's what I did, however I put 7 together.

While looking on the forum I found the answer to my question: MCP23S17, 16 pins digital in SPI. We can put 8 ic on the same port spi, the ideal for my project!