TCA9548A I2C Multiplexer 8路 IIC I2C 多路擴展板模組


TCA9548A I2C Multiplexer 8路 IIC I2C 多路擴展板模組

NT$125 NT$110

Availability: 尚有庫存 貨號: OMD-006312 分類: 標籤: , ,


TCA9548A 多通道 8路 IIC I2C 多路擴展板模組 串接多個 IIC 感測器不怕衝突

TCA9548A 多通道 8路 IIC I2C 多路擴展板模組,可以把具有相同地址的模組(裝置)連接到本模組不同組別的I2C引腳上(SD0,SC0~SD7,SC78組接口,I2C地址0x70~ 0x77,可由A0~A2引腳來選擇設定),然後主機可以自由選擇哪一組接口上的裝置進行通訊,從而解決地址衝突問題;當然也可同時連接多組相同及不同地址的I2C裝置。

你想連接兩個或三個或更多的人到你的當你意識到“哦,這個晶片有一個固定的I2C地址,和從我所知道的關於I2C,你不能有兩個設備在同一SDA/SCL引腳相同的地址!穿梭命令到選定的I2C引腳與您的命令。 TCA9548A 使用它是相當簡單的:多路復用器本身是對I2C地址0x70(但可以從0x70到0x77調整),你只需要寫一個字節所需的多路輸出數量,港口,和BAM -任何未來的I2C數據包將被發送到該端口。在理論上,你可以有8個多路復用器,每個0x70-0x77地址為了控制64的same-i2c-addressed-part。
TCA9548A 多通道 8路 IIC I2C 多路擴展板模組 本身是3V和5V兼容,所以你可以使用它與任何邏輯電平。
TCA9548A I2C Multiplexer
TCA9548A I2C Multiplexer


TCA9548A I2C Multiplexer

The TCA9548A device has eight bidirectional translating switches that can be controlled through the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. These downstream channels can be used to resolve I2C slave address conflicts. For example, if eight identical digital temperature sensors are needed in the application, one sensor can be connected at each channel: 0-7.
The system master can reset the TCA9548A in the event of a time-out or other improper operation by asserting a low in the RESET input. Similarly, the power-on reset deselects all channels and initializes the I2C/SMBus state machine. Asserting RESET causes the same reset and initialization to occur without powering down the part. This allows recovery should one of the downstream I2C buses get stuck in a low state.


  • 1-to-8 Bidirectional translating switches
  • I2C Bus and SMBus compatible
  • Active-low reset input
  • Three address pins, allowing up to eight TCA9548A devices on the I2C bus
  • Channel selection through an I2C Bus, in any combination
  • Power up with all switch channels deselected
  • Low RON switches
  • Allows voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses
  • No glitch on power up
  • Supports hot insertion
  • Low standby current
  • Operating power-supply voltage range of
    1.65 V to 5.5 V
  • 5-V Tolerant inputs
  • 0- to 400-kHz Clock frequency
  • Latch-up performance exceeds 100 mA Per JESD 78, class II
  • ESD Protection exceeds JESD 22
    • ±2000-V Human-body model (A114-A)
    • 200-V Machine model (A115-A)
    • ±1000-V Charged-device model (C101)



搶先評價 “TCA9548A I2C Multiplexer 8路 IIC I2C 多路擴展板模組”