Plessey 8258590 IC vintage ceramic dual in-line package (DIP) integrated circuit

Plessey 8258590 IC

​This is a vintage ceramic dual in-line package (DIP) integrated circuit from the British company Plessey.

​Specs: The exact function is unknown as the part number 8258590 is likely a proprietary or custom designation for a specific piece of equipment. It is a vintage IC in a hermetic ceramic package.

​Approximate Price: As this is not a standard, publicly available part, its value is mainly to collectors or for the repair of specific, rare vintage electronics. Its approximate value would be between C5 and C30, depending on demand.

​Grumman (OH90198) Integrated Circuit

​This is a highly specialized integrated circuit in a ceramic pin grid array (CPGA) package. The markings suggest it is a component from an aerospace or defense contractor, likely Grumman Aerospace.

​Specs: The part number OH90198 and other markings like 80090 are associated