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TDA1008 - Gating/Frequency divider

Siel Orchestra, Orchestra 2

TDA1305T - DAC

used in Korg Z1

TMS57070FFT

DSP used in Oberheim OB-12, Korg Z1, Triton, BX-3, CX-3 (modern version), Electribe ES-1, EM-1, and all kind of digital processors like Korg AX-1500G, Vox Tonelab TT, etc

TMS7000NL-2

Siel DK 70, DK 80, EX 80, DK600, DK700, Opera 6, Elka OMB-5, Drumstar 64, Drumstar 80, Jen Synx 508.
Attention: Siel Synthesizers mostly use TMS7000N2L-2 which has a 1.778mm pin pitch. Jen Synx 508 also used the small pitch version.

TMS7001NL-2

Elka EK22, EK44, EM22, EM44, ER44, ER33 processor

TMS7002NL

Solton TS4K, TS4, TS3K, TS3, K160, Keytek (Siel) CTS-2000, Elka OMB3

TMS3631-RI104

There are two versions of these integrated circuits: RI104 which generates the octave pitches (2', 4', 8' and 16') and the RI106 which generates the 1/3' ones (10'2/3, 5'1/3, 2'2/3 and 1'1/3). I only have stock of RI104 used in Siel DK600, DK700 and Jen Synx 508.

TMS3617NS

Used in Roland VK-09

XCB56362PV100 - DSP56362

Motorola (Now Freescale/NXP) 24 bit Audio Digital Signal Processor
Korg MS2000, MS2000R, Novation Supernova II, Novation Supernova II expansion board, Korg BX-3, CX-3 year 2000 version.

XR2206

Linn LM-1

YM2203 Yamaha FM operator

used in Elka EK44

Zilog Z80 CPU

You should also check my Z80 CPU tester
used in Sequential Drumtraks, Prophet 5, Prophet 10, Prophet 600, Moog Memorymoog, Roland Jupiter 8, Oberheim OB-8, E-mu Emulator I and II, SP-12, SP-1200, Drumulator, Linn LM-1, Linndrum and so many more...

Nec D1867G

This is the heart of Casio VL-1 and others.