74ACT1284MSAIC TRANSCEIVER IEEE1284 20-SSOP|FAIRCHILD SEMICONDUCTOR|Lead All|RoHS Mixed SN74ACT1284DBR SN74ACT1284DBR 74ACT1284MSAXTXRX IEEE TTL COMPATIBLE 20SSOP|FAIRCHILD SEMICONDUCTOR|Lead free|RoHS Compliant SN74ACT1284DBR SN74ACT1284DBR