1842VG2 - Rare USSR Soviet Russian IC (Integral factory (Minsk), 1991, Military - Rhombus sign) 
1842VG2 is a terminal device memory controller.
The microcircuit is intended for use in special-purpose equipment with strictly limited power consumption and weight and size characteristics.
it is a radiation-resistant analog of the 588VG6 microcircuit 
and designed to convert serial information from the normalized code to the Manchester-2 code and vice versa at a rate of 1 Mbit per second

Great item for chip collectors !!!

CPU from the old stock, new, in working order.