| 137841 | 74F521SC | 8-Bit de identitate Comparator | Fairchild Semiconductor |
| 137842 | 74F521SC | 8-Bit de identitate Comparator | National Semiconductor |
| 137843 | 74F521SCX | 8-Bit de identitate Comparator | Fairchild Semiconductor |
| 137844 | 74F521SJ | 8-Bit de identitate Comparator | Fairchild Semiconductor |
| 137845 | 74F521SJ | 8-Bit de identitate Comparator | National Semiconductor |
| 137846 | 74F521SJX | 8-Bit de identitate Comparator | Fairchild Semiconductor |
| 137847 | 74F524 | Comparator înregistrat pe 8 biți | Fairchild Semiconductor |
| 137848 | 74F524 | Comparator înregistrat pe 8 biți | National Semiconductor |
| 137849 | 74F524 | Comparator registru pe 8 biți (colector deschis + 3-State) | Philips |
| 137850 | 74F524CW | 8-Bit inregistrat Comparator | Fairchild Semiconductor |
| 137851 | 74F524PC | Comparator înregistrat pe 8 biți | Fairchild Semiconductor |
| 137852 | 74F524SC | Comparator înregistrat pe 8 biți | Fairchild Semiconductor |
| 137853 | 74F524SCX | 8-Bit inregistrat Comparator | Fairchild Semiconductor |
| 137854 | 74F525 | Contor programabil pe 16 biți | National Semiconductor |
| 137855 | 74F5300 | Driver LED cu fibră optică | Philips |
| 137856 | 74F5302 | Driver cu fibră optică dual LED / ceas | Philips |
| 137857 | 74F533 | Zăvor transparent octal cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137858 | 74F533 | Octal Blocare transparent cu Tri-State ieșiri | National Semiconductor |
| 137859 | 74F533 | Dispozitivul de blocare / flip-flop | Philips |
| 137860 | 74F533PC | Zăvor transparent octal cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137861 | 74F533PC | Octal Blocare transparent cu Tri-State ieșiri | National Semiconductor |
| 137862 | 74F533SC | Zăvor transparent octal cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137863 | 74F533SC | Octal Blocare transparent cu Tri-State ieșiri | National Semiconductor |
| 137864 | 74F533SCX | Zăvor transparent octal cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137865 | 74F533SJ | Zăvor transparent octal cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137866 | 74F533SJ | Octal Blocare transparent cu Tri-State ieșiri | National Semiconductor |
| 137867 | 74F534 | Flip-flop octal tip D cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137868 | 74F534 | Octal D Flip-Flop cu Tri-State ieșiri | National Semiconductor |
| 137869 | 74F534 | Octal D flip-flop, inversoare (3-State) | Philips |
| 137870 | 74F534PC | Flip-flop octal tip D cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137871 | 74F534PC | Octal D-Type Flip-Flop cu Tri-State ieșiri | National Semiconductor |
| 137872 | 74F534SC | Flip-flop octal tip D cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137873 | 74F534SC | Octal D-Type Flip-Flop cu Tri-State ieșiri | National Semiconductor |
| 137874 | 74F534SCX | Flip-flop octal tip D cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137875 | 74F534SJ | Flip-flop octal tip D cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137876 | 74F534SJ | Octal D-Type Flip-Flop cu Tri-State ieșiri | National Semiconductor |
| 137877 | 74F534SJX | Flip-flop octal tip D cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137878 | 74F537 | Decodor 1 din 10 cu ieșiri 3-STATE | Fairchild Semiconductor |
| 137879 | 74F537 | Decodor 1 din 10 cu ieșiri TRI-STATE | National Semiconductor |
| 137880 | 74F537 | 1-din-10 decodor 3-State | Philips |
