ICL3221IAZIC TXRX SGL RS232 3-5.5V 16SSOP|INTERSIL|Lead free|RoHS Compliant MAX3227EEAE+ SN65C3221DBG4 ICL3221IAZ-TIC 2DRVR/2RCVR RS232 3V 16-SSOP|INTERSIL|Lead free|RoHS Compliant MAX3221IDBR MAX3221IDBR MAX3227EEAE+T SN65C3221DBRG4 TRSF3221EIDBRG4