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如果只是简单的IO,并且变化速度很低的话,可以考虑简单的SN74AHC1G125这一类的buffer。如果速率在10Hz~1MHz的,就需要用差分逻辑来传输,可以考虑485芯片像SN65HVD08这一类,如果速度再高1M~500M,可以考虑用LVDS逻辑来传输,Sn65LVDS050这样的