These are from an old military PCBs. pl. help me identify these.

enter image description here 14Pin metal soic Russian military ics

14pin soic 14pinpl name these.

  • \$\begingroup\$ From what kind of PCB you found this? It's a russian device, right? \$\endgroup\$
    – Antonio
    Nov 2 '16 at 10:28
  • \$\begingroup\$ Hm... 90 degree tracing \$\endgroup\$
    – Nazar
    Nov 2 '16 at 14:18

These are military grade radiation proof 54 series TTL chips.

  • Top and middle LA8A are quad 2-input NAND gates with open collector (5400)
  • Bottom LB1A is quad 2-input NAND gates (5401)

Pinout is unknown. I think you can figure it out yourself.

PCBs should not be old as datecodes of the chips are 2011.

  • \$\begingroup\$ Thank you very much. I will try to substitute these in the schematic and verify the functionality is meaningful. \$\endgroup\$
    – srinivas T
    Nov 2 '16 at 10:13
  • \$\begingroup\$ What manufacturer is the logo? \$\endgroup\$
    – Antonio
    Nov 2 '16 at 10:30
  • \$\begingroup\$ The logo from web says Electronika ussr. But i can't find the manufacturer. \$\endgroup\$
    – srinivas T
    Nov 2 '16 at 10:40
  • 2
    \$\begingroup\$ vzpp-s.ru/about.htm \$\endgroup\$
    – Anonymous
    Nov 2 '16 at 11:14
  • \$\begingroup\$ The part numbers are as follows 1505ЛА2АЭВ 1505ТВ1 1505ТМ2АЭВ, the 2 and 3 are the same as 4 and 5 respectively - from the catalog, but no specsheets are available. \$\endgroup\$
    – Nazar
    Nov 2 '16 at 14:49

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