Synthechnics

MB81464-10 or M5M4464AL-12 (ZIP Socket) 65536-WORD by 4 -BIT Dynamic RAM

Korg 01/W family DRAM. There are 5 units of these chip in these synthesizers. Early units used M5M4464AL-12, later units used MB81464-10

MB8416-20

Sequential Circuits Drumtraks

HM6116LP-3

Korg Poly 800, Sequential Prophet 600

TC5517APL RAM - 2048x8 bit static RAM

Kawai SX-210, Roland Alpha Juno 2,