SP3220E/EB/EU +3.0V to +5.5V RS-232 Driver/Receive.
SP3220E - +3.0V to +5.5V RS-232 Driver/Receiver Pair
SP3220EB - +3.0V to +5.5V RS-232 Driver/Receiver Pair
SP3220EU - +3.0V to +5.5V RS-232 Driver/Receiver Pair