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SIT3088EESA RS-485/RS-422芯片 3.0V~5.5V供电，ESD15KVHBM，256
SIT3088ETK RS-485/RS-422芯片 3.0V~5.5V供电，ESD15KVHBM，256
SIT3088EEPA RS-485/RS-422芯片 3.0V~5.5V供电，ESD15KVHBM，256
