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3pcs Smart Electronics CD74HC4067 16-Channel Analog Digital Multiplexer PCB Board Module

4.340

$2.99 / $3.65

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$2.99 / $3.65

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Specifications:

1. 2V to 6V operation

2. "On" resistance: 70 Ohms @ 4.5V

3. 6ns break-before-make @ 4.5V

4. Wide operating temperature range: -50℃ to 125℃

Features:

- This is a break board for the very handy 16-Channel Analog/Digital Multiplexer/Demultiplexer CD74HC4067.

- This chip is like a rotary switch - it internally routes the common pin to one of 16 channel pins (CHANxx).

- It works with both digital and analog signals (the voltage can"t be higher than VCC),and the connections function in either direction.

- To control it, connect 4 digital outputs to the chip"s address select pins (S0-S3),and send it the binary address of the channel you want.

- This allows you to connect up to 16 sensors to your system using only 5 pins!

- You can use it to pipe TTL-level serial data to or from multiple devices.

For example, you could use it to connect the TX pins of 16 devices to one RX pin on your microcontroller.

You can then select any one of those 16 devices to listen to.

If you want two-way communications, you can add a second board to route your microcontroller"s TX line to 16 device"s RX lines.

By using multiple boards, you can create similar arrangements for I2C, SPI, etc.

The internal switches are bidirectional, support voltages between ground and VCC, have low "on" resistance and low "off" leakage, and to prevent crosstalk, perform "break-before-make" switching.

The board also breaks out the chip"s "enable" pin, which when driven high, will completely disconnect the common pin (all switches "off").

Package Included:

3 x CD74HC4067 16-Channel Analog Digital Multiplexer

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3pcs Smart Electronics CD74HC4067 16-Channel Analog Digital Multiplexer PCB Board Module

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Kioutsouk I. VIP3
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29/01/2021

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BG369141141 VIP1
AU

28/10/2021

These are literally just breakout boards for the CD74HC4067, with a bypass cap close to the power pin, which is a nice addition and ensures much more stable operation than you would get by using your own, which would necessarily be further away. It works very well, but there are a few things to note about the chip that may be relevant depending on what kind of analog signals you're working with. Per the datasheet, there is 0.051% sine wave distortion with a 5V signal level. That may not sound like much, but the sine wave is the easiest test condition possible, so it's likely to be worse with other wave shapes - particularly the square waves seen in digital signals. For audio, 0.051% at 5V works out to be a distortion level of about 2.5mW - consider that a 2.5mW into most headphones would be loud enough to cause permanent hearing damage, these boards are NOT suitable for switching audio sources for, say, a headphone amp. Even for loudspeakers, that level of distortion is going to be audible, especially since power constraints mean you're probably going to be switching at the preamp, not the power amp. This board shines when you have lots of analog sensor sources with small signals that aren't precise enough for a 0.051% difference to matter, just don't expect fantastic performance for audio.

These are literally just breakout boards for the CD74HC4067, with a bypass cap close to the power pin, which is a nice addition and ensures much more stable operation than you would get by using your own, which would necessarily be further away. It works very well, but there are a few things to note about the chip that may be relevant depending on what kind of analog signals you're working with. Per the datasheet, there is 0.051% sine wave distortion with a 5V signal level. That may not sound like much, but the sine wave is the easiest test condition possible, so it's likely to be worse with other wave shapes - particularly the square waves seen in digital signals. For audio, 0.051% at 5V works out to be a distortion level of about 2.5mW - consider that a 2.5mW into most headphones would be loud enough to cause permanent hearing damage, these boards are NOT suitable for switching audio sources for, say, a headphone amp. Even for loudspeakers, that level of distortion is going to be audible, especially since power constraints mean you're probably going to be switching at the preamp, not the power amp. This board shines when you have lots of analog sensor sources with small signals that aren't precise enough for a 0.051% difference to matter, just don't expect fantastic performance for audio.

These are literally just breakout boards for the CD74HC4067, with a bypass cap close to the power pin, which is a nice addition and ensures much more stable operation than you would get by using your own, which would necessarily be further away. It works very well, but there are a few things to note about the chip that may be relevant depending on what kind of analog signals you're working with. Per the datasheet, there is 0.051% sine wave distortion with a 5V signal level. That may not sound like much, but the sine wave is the easiest test condition possible, so it's likely to be worse with other wave shapes - particularly the square waves seen in digital signals. For audio, 0.051% at 5V works out to be a distortion level of about 2.5mW - consider that a 2.5mW into most headphones would be loud enough to cause permanent hearing damage, these boards are NOT suitable for switching audio sources for, say, a headphone amp. Even for loudspeakers, that level of distortion is going to be audible, especially since power constraints mean you're probably going to be switching at the preamp, not the power amp. This board shines when you have lots of analog sensor sources with small signals that aren't precise enough for a 0.051% difference to matter, just don't expect fantastic performance for audio.

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