National Semiconductor MM2716Q 16K UV EPROM Ceramic DIP-24 Gold Leads Arcade IC NOS 1 PCS

1 PCS original National Semiconductor MM2716Q ultraviolet-erasable programmable read-only memory IC in a 24-pin ceramic DIP package with UV erase window and gold-plated leads. Device markings include MM2716Q and 851, with additional underside marking EC4/B/X/E.

The MM2716Q is a 16,384-bit UV EPROM organized as 2048 x 8 bits. It was designed for nonvolatile program and data storage in early microprocessor systems and operates from a 5V supply during normal read operation. This ceramic-window version is representative of the early programmable memory devices widely used in arcade machines, computers, industrial controllers, instrumentation, and other digital equipment.

LIFECYCLE: OBSOLETE. The National Semiconductor MM2716Q is discontinued and no longer in current production. Original ceramic National Semiconductor examples are legacy repair and restoration components.

HISTORICAL BACKGROUND:
The 2716 generation of EPROMs became an important part of late-1970s and early-1980s microprocessor-based electronics. Unlike fixed mask ROMs, these devices could be erased by exposing the silicon die through the quartz window to ultraviolet light and then electrically reprogrammed. This gave manufacturers, service technicians, and developers a practical method of storing and updating firmware, game code, graphics, lookup tables, and control programs.

National Semiconductor manufactured the MM2716 family as a 2K x 8-bit EPROM, providing 2,048 bytes of nonvolatile storage in a 24-pin package. Ceramic-window versions such as the MM2716Q were commonly manufactured with gold-finished leads and are now recognizable components from the early programmable-memory era.

The exact MM2716Q is documented in classic arcade hardware. Examples include Zaccaria Sea Battle arcade boards, where MM2716Q devices were used as program memory, and World Tennis arcade hardware, where an MM2716Q was used on the sound PCB. The broader 2716 EPROM family was extensively used throughout early arcade, pinball, computer, and microprocessor-controlled equipment.

Because original arcade boards often depend on period-correct EPROM types, surviving MM2716Q devices remain useful for restoration, ROM replacement, firmware preservation, and vintage digital electronics repair.