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我想用CD4051作为USART串口的RX扩展,但是如何计算CD4051的速度能满足何种波特率的通讯?



我想用CD4051作为USART串口的RX扩展,但是如何计算CD4051的速度能满足何种波特率的通讯?

  • 您好,开关器件的带宽和信号的data rate有一个大致的计算公式,即为Bandwidth = (3/2)xDataRate.
    对于CD4051来说,datasheet中给出了-3dB的信号带宽为20MHz,那么理论上能够支持的data rate为=(2/3)*Bandwidth=2/3*20=13.3Mbps.