| 155601 | 74ACT399 | Quad 2-Port Register | Fairchild Semiconductor |
| 155602 | 74ACT399 | Quad 2-Port Register | National Semiconductor |
| 155603 | 74ACT399CW | Quad 2-Port Register | Fairchild Semiconductor |
| 155604 | 74ACT399MTC | Quad 2-Port Register | Fairchild Semiconductor |
| 155605 | 74ACT399MTCX | Quad 2-Port Register | Fairchild Semiconductor |
| 155606 | 74ACT399PC | Quad 2-Port Register | Fairchild Semiconductor |
| 155607 | 74ACT399SC | Quad 2-Port Register | Fairchild Semiconductor |
| 155608 | 74ACT399SCX | Quad 2-Port Register | Fairchild Semiconductor |
| 155609 | 74ACT399SJ | Quad 2-Port Register | Fairchild Semiconductor |
| 155610 | 74ACT399SJX | Quad 2-Port Register | Fairchild Semiconductor |
| 155611 | 74ACT520 | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155612 | 74ACT520 | 8-Bit Identity Comparator | National Semiconductor |
| 155613 | 74ACT520CW | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155614 | 74ACT520PC | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155615 | 74ACT520SC | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155616 | 74ACT520SCX | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155617 | 74ACT520SJ | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155618 | 74ACT520SJX | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155619 | 74ACT521 | 8-Bit Identity Comparator | Fairchild Semiconductor |
|
| 155620 | 74ACT521 | 8-BIT IDENTITY COMPARATOR | Motorola |
| 155621 | 74ACT521 | 8-Bit Identity Comparator | National Semiconductor |
| 155622 | 74ACT521CW | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155623 | 74ACT521MTC | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155624 | 74ACT521MTCX | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155625 | 74ACT521PC | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155626 | 74ACT521SC | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155627 | 74ACT521SCX | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155628 | 74ACT521SJ | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155629 | 74ACT521SJX | 8-Bit Identity Comparator | Fairchild Semiconductor |
| 155630 | 74ACT533 | Octal Transparent Latch with 3-STATE Outputs | Fairchild Semiconductor |
| 155631 | 74ACT533MTC | Octal Transparent Latch with 3-STATE Outputs | Fairchild Semiconductor |
| 155632 | 74ACT533MTCX | Octal Transparent Latch with 3-STATE Outputs | Fairchild Semiconductor |
| 155633 | 74ACT533PC | Octal Transparent Latch with 3-STATE Outputs | Fairchild Semiconductor |
| 155634 | 74ACT533SC | Octal Transparent Latch with 3-STATE Outputs | Fairchild Semiconductor |
| 155635 | 74ACT533SCX | Octal Transparent Latch with 3-STATE Outputs | Fairchild Semiconductor |
| 155636 | 74ACT534 | Octal D-Type Flip-Flop with 3-STATE Outputs | Fairchild Semiconductor |
| 155637 | 74ACT534 | Octal D Flip-Flop with TRI-STATE Outputs | National Semiconductor |
| 155638 | 74ACT534CW | Octal D Flip-Flop with 3-STATE Outputs | Fairchild Semiconductor |
| 155639 | 74ACT534PC | Octal D Flip-Flop with 3-STATE Outputs | Fairchild Semiconductor |
| 155640 | 74ACT534SC | Octal D Flip-Flop with 3-STATE Outputs | Fairchild Semiconductor |
