Analog/Digital MUX Breakout – CD74HC4067 高速CMOS 16通道類比數位訊號多工器

商品說明

CD74HC4067 高速 CMOS 16通道 類比數位訊號 多工器 Analog/Digital  使用一路ADC 採集16路模擬信號

CD74HC4067 是非常方便的16通道模擬/數字多路復用器/多路解復用器CD74HC4067的分線板。該芯片就像一個旋轉開關 – 它在內部將公共引腳（原理圖中的COM，電路板上的SIG）路由到16個通道引腳（CHANxx）之一。它適用於數字和模擬信號（電壓不能高於VCC），並且連接在任一方向上起作用。要控制它，將4個數字輸出連接到芯片的地址選擇引腳（S0-S3），並將其發送到所需通道的二進制地址（有關詳細信息，請參見數據表）。這允許您僅使用5個引腳將最多16個傳感器連接到您的系統！

由於mux / demux也可以處理數字信號，因此您可以使用它將TTL級串行數據傳輸到多個設備或從多個設備傳輸。例如，您可以使用它將16個器件的TX引腳連接到微控制器上的一個RX引腳。然後，您可以選擇要監聽的16個設備中的任何一個。如果您需要雙向通信，可以添加第二塊電路板，將微控制器的TX線路連接到16個設備的RX線路。通過使用多個板，您可以為I2C，SPI等創建類似的安排。

內部開關是雙向的，支持地和VCC之間的電壓，具有低“導通”電阻和低“關斷”洩漏，並且為了防止串擾，執行“先斷後合”切換。電路板還會斷開芯片的“使能”引腳，當驅動為高電平時，該引腳將完全斷開公共引腳（所有開關“關閉”）。

特徵

• 2V至6V操作
• “開”電阻：70歐姆@ 4.5V
• 6ns先斷後續@ 4.5V
• 寬工作溫度範圍：-55C至125C

 

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CD74HC4067 16-Channel Analog Digital Multiplexer Breakout Board Module Arduino

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”).

Features

• 2V to 6V operation
• “On” resistance: 70 Ohms @ 4.5V
• 6ns break-before-make @ 4.5V
• Wide operating temperature range: -55C to 125C

Documents

• Datasheet
• bildr blog – CD74HC4067
• GitHub