National Semiconductor NM27C256Q-150 EPROM – CDIP-28 Package (Replaces -200, -250)

Hey electronics hobbyists and hardware folks.

I've got a vintage but brand new National Semiconductor NM27C256Q-150 EPROM here.

This is a 256k (32k x 8) UV erasable programmable read-only memory, and it comes in a classic ceramic DIP-28 package.

It's the -150 speed version, which is actually faster than the -200 or -250 versions, making it a great replacement or upgrade for older gear.

It's brand new, old stock, still in its original packaging, never used.

If you're restoring old computers, arcade games, or any piece of retro tech that needs this specific chip, this is a golden find.

The part number is NM27C256Q-150.

Don't settle for pulled or used chips when you can get a fresh one ready to program.

It's getting harder to find these, so if you need it, grab it now.