| MAX252 | RS 232, 422, 485, 644, X21, V35 |
| MAX250 | RS 232, 422, 485, 644, X21, V35 |
| MAX251 | RS 232, 422, 485, 644, X21, V35 |
| MAX253 | Special Driver, Receiver |
| MAX2510 | Transceiver, Active, RF & IF |
| MAX2511 | Transceiver, Active, RF & IF |
| MAX2510 | Transceiver, Active, RF & IF |