DM74ALS540ASJIC INVERTER 8-INPUT 20SOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74ALS540-1NSR SN74ALS540-1NSR SN74ALS540NSRG4 DM74ALS540ASJXIC INVERTER 8-INPUT 20SOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74ALS540NSRE4 SN74ALS540NSR