http://www.onsemi.com/pub/Collateral/SN74LS00-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS02-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS04-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS05-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS08-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS10-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS32-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS74A-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS86-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS160A-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS194A-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS240-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS373-D.PDF

http://www.onsemi.com/pub/Collateral/SN74LS377-D.PDF

http://www.onsemi.com/pub/Collateral/MC7800-D.PDF

http://www.fairchildsemi.com/ds/MM/MM74C04.pdf

http://www.cypress.com/pub/datasheets/cy7c128a.pdf