| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | 74F646 |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
 National Semiconductor ... | 74F646B |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BFCQB |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BFCX |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BFMQB |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BFMX |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BLCQB |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BLCX |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BLMQB |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |
| 74F646BLMX |  216Kb/ 12P | Octal Transceiver/Register with TRI-STATE Outputs |