| uA9637AC | Differential, Driver, Receiver |
| uA9638C | Differential, Driver, Receiver |
| uA9639C | Differential, Driver, Receiver |
| uA9638C | RS 232, 422, 485, 644, X21, V35 |
| uA9639C | RS 232, 422, 485, 644, X21, V35 |
| uA9637AC | RS 232, 422, 485, 644, X21, V35 |
| uA9638C | RS 232, 422, 485, 644, X21, V35 |
| UA9636A | RS 232, 422, 485, 644, X21, V35 |
| UA9636A | RS 232, 422, 485, 644, X21, V35 |
| UA9636A | RS 232, 422, 485, 644, X21, V35 |