A typical Soviet IC part is 134ЛБ2. The 134 indicates the TTL family. The Л (L) indicates it's a logic gate IC and ЛБ indicates it's a NAND/NOR. If you know the categories, you know what more or less what the IC does.
A typical US IC part is 7490. 74 indicates the TTL family. But the 90 is arbitrary. The 7490 is a counter but 7491 is a shift register. The part number doesn't give you any idea what the IC does.
A typical US IC part is 7490. 74 indicates the TTL family. But the 90 is arbitrary. The 7490 is a counter but 7491 is a shift register. The part number doesn't give you any idea what the IC does.
See Wikipedia for details on the Soviet IC system: https://en.wikipedia.org/wiki/Soviet_integrated_circuit_desi...