74F20SJIC GATE NAND DUAL 4INPUT 14SOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74F20NSR SN74F20NSR SN74F20NSR 74F20SJXIC GATE NAND DUAL 4INPUT 14SOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74F20NSR SN74F20NSR SN74F20NSRG4