NEC High-Performance Quad Operational Amplifier IC uPC3403C (C3403C)

NEC High-Performance Dual Operational Amplifier IC uPC4557C (C4557C)

NEC UPC253A Programmable Operational Amplifier IC

Burr-Brown Operational Amplifier IC OPA658U

Linear Technology LT1013CN8 Quad Precision Operational Amplifier (DIP-8)

Texas Instruments TLC084CDR Quad Operational Amplifier (Set of 2)

Quad Operational Amplifier uPC324C-A, 4-Ch, 5-Pack

Hitachi Dual Operational Amplifier IC HA17358F-EL (Set of 5)