16-Channel Analog Multiplexer Demultiplexer

16-Channel Analog Multiplexer Demultiplexer

This topic has 7 replies, 4 voices, and was last updated 30 January 2025 at 20:35 by Bazyle.

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22 January 2025 at 09:53 #778984
Michael Gilligan
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@michaelgilligan61133
These chips have been available for years … but Mr Ali lured me into a ‘must have a play’ purchase !

MichaelG.

.

Ref. https://www.instructables.com/Tutorial-74HC4067-16-Channel-Analog-Multiplexer-De/

.
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22 January 2025 at 19:20 #779112
John Haine
Participant
@johnhaine32865
Do you have a specific application in mind Michael?
22 January 2025 at 19:53 #779120
Michael Gilligan
Participant
@michaelgilligan61133
No, John … not yet

I was just led into temptation.

[ and thought others might have either used the chip, or be interested … given the pricing of that breakout board ]

MichaelG
22 January 2025 at 20:27 #779129
duncan webster 1
Participant
@duncanwebster1
You can get I2C devices which give you lots more ports on your Arduino etc, as far as I can see you can chain them, of course it slows down reading of individual pins, but you can’t have everything
22 January 2025 at 21:30 #779151
duncan webster 1
Participant
@duncanwebster1
Here’s a link

https://github.com/ndomx/MCP23017-Arduino-Library
23 January 2025 at 07:40 #779213
John Haine
Participant
@johnhaine32865
I think that’s a digital mpx, the 4067 is analogue though it can also handle digital.
30 January 2025 at 19:44 #781106
Michael Gilligan
Participant
@michaelgilligan61133
The little breakout boards arrived safely today, courtesy of my very reliable Evri courier.

They are nicely made, and if they perform to spec. are probably at least an order-of-magnitude cheaper than the equivalent mechanical switch.

Unfortunately, personal issues preclude me from testing them any time soon.

MichaelG.
30 January 2025 at 20:35 #781113
Bazyle
Participant
@bazyle
I think there is a dual channel 8 way too; used for stereo input selection. I’ve probably got some somewhere.
The I2C expander is more interesting, it has ‘interrupt on change detected’ pins. Useful for ESP32C3 which has few i/o lines.
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