Mostek MK36521PIBMFirmware ROM Ceramic Gold Lid DIP-24 1982 Vintage NOS

Condition
Vintage NOS New old stock, sourced from a decommissioned laboratory in Sweden. Hermetic ceramic DIP-24 package with gold lid and gold leads. Marked © IBM 1980 with date code 8231 (1982, week 31). Clean pins and intact sealing surface, only minor cosmetic storage marks consistent with long-term storage. See photos for exact item.

Item specifics
Brand: IBM / Mostek
Part number marking: MK36521P
IBM part number: 8493730
Type: Mask ROM firmware IC (ROS)
Package / Case: Ceramic DIP-24, hermetic gold lid
Mounting style: Through-hole
Date code: 8231 (1982)

What you get
1 x Original IBM firmware ROM module exactly as shown.

Notes
Vintage IBM proprietary firmware ROM manufactured by Mostek in hermetic ceramic packaging. Marked © IBM 1980 and bearing IBM internal part numbering. Devices of this type were used in early-1980s IBM computer, terminal, and controller hardware where firmware was permanently stored in mask ROM.

Exact machine compatibility is unknown; sold as a collectible vintage electronic component suitable for restoration projects or semiconductor collectors.

Shipping
FREE Worldwide Registered Shipping
Dispatch: Within 1 business day from Spain
Local Pickup: Available in Estepona (29680), Spain

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