DM74ALS257SJXIC DATA SELECTOR/MUX QUAD 16SOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74ALS257ANSR DM74ALS257SJIC DATA SELECTOR/MUX QUAD 16SOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74ALS257ANSRG4