DM74AS648WMIC TRANSCVR 8BIT N-INV 24SOIC|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74AS648DWE4 SN74AS648DW DM74AS648WMXIC TRANSCVR 8BIT N-INV 24SOIC|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74AS648DWR SN74AS648DW