Pin assignments for 74LS00 / 74LS02 / 74LS04 / 74LS10 / 74LS20 / 74LS27 / 74LS73 / 74LS132 / 74LS47 / 74LS283 / LM555 / LT312 Seven-segment display Full Data Sheets: 74LS00 74LS02 74LS04 74LS10 74LS20 74LS27 74LS47 LT312 Seven-segment display (same as NTE 3052) 74LS73 74LS132 74LS283 LM555 LM741 TLP/RLP434 TLP/RLP434A