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