HD74LS49FP HD74LS49FP(SMD) HD74LS49P HD74LS5 HD74LS5087 HD74LS5087P HD74LS51 HD74LS51-A HD74LS519P HD74LS51D HD74LS51FPEL HD74LS51KH HD74LS51P HD74LS5251P HD74LS534P HD74LS54 HD74LS540P HD74LS54N HD74LS54P HD74LS55FP HD74LS55FP-EL HD74LS55G HD74LS55P HD74LS573DWS HD74LS573P HD74LS597P HD74LS612P HD74LS61P HD74LS64 HD74LS640 HD74LS640-1P HD74LS640FP HD74LS640FPEL HD74LS640FPER HD74LS640FPTR HD74LS640P HD74LS641 HD74LS641-1 HD74LS641FP HD74LS641FPEL HD74LS641FPTL HD74LS641FPTR HD74LS641P HD74LS641SOP-1 HD74LS642 HD74LS642-1 HD74LS642-1P HD74LS6421P HD74LS642FP HD74LS642FP-EL HD74LS642FPEL HD74LS642FPTL HD74LS642N HD74LS642P HD74LS645-1 HD74LS645-1P HD74LS645-IP HD74LS645FIP HD74LS645FP HD74LS645FPTL HD74LS645P HD74LS645P-E HD74LS64P HD74LS668P HD74LS669 HD74LS669FP HD74LS669P HD74LS670 HD74LS670FPEL HD74LS670P HD74LS68A HD74LS7 HD74LS73 HD74LS737P HD74LS73A HD74LS73AFP HD74LS73AP HD74LS73AP-E HD74LS73AP-E-Q HD74LS73N HD74LS73P HD74LS74 HD74LS74123P HD74LS74A HD74LS74A(FP-14DA) HD74LS74A-A HD74LS74A10 HD74LS74AF HD74LS74AFEL HD74LS74AFP HD74LS74AFP-E HD74LS74AFP-ER