| Mfr Part # | Mfr | Series | Package | Product Status | Accessory Type |
|---|---|---|---|---|---|
| MM74HC688SJ | Fairchild Semiconductor | 74HC | Tube | Obsolete | - |
| MC74F85M | onsemi | * | Bulk | Active | - |
| 74F521SCX | Fairchild Semiconductor | 74F | Bulk | Obsolete | - |
| CD74FCT521DTM | Harris Corporation | - | Bulk | Active | - |
| 74F521SC | Fairchild Semiconductor | 74F | Tube | Obsolete | - |
| 74AC11521DW | Texas Instruments | * | Bulk | Active | - |
| 74F521SJX | Fairchild Semiconductor | 74F | Bulk | Obsolete | - |
| MC10166P | onsemi | * | Bulk | Active | - |
| 5485DM | National Semiconductor | 5485 | Bulk | Active | - |
| 74F521SJ | Fairchild Semiconductor | 74F | Tube | Obsolete | - |