| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | INS8250A |  91Kb/8P | A Comparison of the INS8250, NS16450 and NS16550AF Series of UARTs April 1989 |
| INS8250A |  673Kb/18P | PC16450C/NS16450,PC8250A/INS8250A UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER |
| INS8251 |  258Kb/8P | PROGRAMMABLE COMMUNICATION INTERFACE |
| INS8254 |  444Kb/14P | N-CHANNEL BIT PROGRAMMABLE |
| INS8254D |  444Kb/14P | N-CHANNEL BIT PROGRAMMABLE |
| INS8254N |  444Kb/14P | N-CHANNEL BIT PROGRAMMABLE |
| INS8255N |  255Kb/12P | PROGRAMMABLE PERIPHERAL INTERFACE |
 National Semiconductor ... | INS82C50A |  91Kb/8P | A Comparison of the INS8250, NS16450 and NS16550AF Series of UARTs April 1989 |