Onchip Systems CEM3340 REV G VCO IC
The Curtis CEM3340 VCO has been reissued by Curtis Electromusic. Note the Rev G in the image. That is the new chip.
This is the ONLY authorized remake of the original trademarked by CEM.
The CEM3340 was responsible for the main VCO used in quite a few classic synths including the Oberheim OB-Xa, OB-Sx & OB-8, the Voyetra 8, Roland SH-101, MC-202, Jupiter-6, and early model MKS-80, The Sequential Circuits Prophet-5 Rev 3, Prophet-10, Prophet-600, Pro-One, and Prophet T8, Moog Memorymoog, Banana Polysynth, Crumar Spirit, Digisound 80 VCO modules, the Synton Syrinx, Steiner Parker EVI, Doepfer's A-111-1 High End VCO
image courtesy of dave smith