HCPL-4506-300 optocoupler by Avago formerly Agilent (formerly HP). Package: 8 (gull wing) surface mount * modified dip-8 sized package - not the wide opto version. Top surface markings of: A4506 Download Agilent HCPL-4506 .pdf datasheet: Status: NOS (New Old Stock) RoHS compliant: tbc