74AC240MTRIC INVERTER DUAL 4-INPUT 20SOIC|STMICROELECTRONICS|Lead free|RoHS Compliant SN74AC240DWR 74AC240MTRIC INVERTER DUAL 4-INPUT 20SOIC|STMICROELECTRONICS (VA)|Lead free|RoHS Compliant SN74AC240DWR 74VHC240MTR