IM1821RU55 - USSR Soviet Russian Gold Ceramic Clone of Intel 81c55 CMOS static RAM 8155

Great item for chip collectors !!!

IM1821RU55 - Rare Russian Gold Ceramic clone of Intel 81c55 RAM (Novosibirsk plant) 2048-bit (256x8) CMOS static RAM with I/O ports and timer.
2x 8-bit I/O ports and 1x 16-bit I/O port. 14-bit timer/counter.

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www.cpu-world.com/CPUs/8085/index.html
www.cpu-world.com/Support/8085.html

RAM chip from the old stock, new, in working order.