multiplexor 16 canale analogic digital CD74HC4067
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Produs:Nou, Fără garanție
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Numar articol:203365383
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Disponibilitate:Indisponibil
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Preț:22,00 Lei
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Anuntul a expirat la:06.03.2022, 08:15
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Specificatii
1.2V to 6V operation
2.“On” resistance: 70 Ohms @ 4.5V
3.6ns break-before-make @ 4.5V
4.Wide operating temperature range: -55C to 125C
This is a breakout 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 (COM in the schematic,
SIG on the board) 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
(see the datasheet for details). This allows you to connect up to
16 sensors to your system using only 5 pins!
Since the mux/demux also works
with digital signals, 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”).
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