Instruments that use this chip: 
Ensoniq ESQ-1, Ensoniq SQ-80 and others.
Integrated circuit, 5503000101 Ensoniq Q-chip, 40-pin DIP.

Please do not order until you are 100% sure that this is the chip you need!
he pictures shown are the exact item that you will receive.

***These IC's must be handled with great care, including anti static precautions. They must be inserted the correct way or else they will be destroyed. If unsure, please consult a qualified technician.***

Tested, works perfectly.