FST3253QSCMUX/DEMUX DUAL 4:1 TTL 16QSOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74CBT3253DBQR CBT3253ADS,112 FST3253QSCXMUX/DEMUX DUAL 4:1 TTL 16QSOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74CBT3253DBQRE4