| Manufacturer | Part # | Datasheet | Description |
 National Semiconductor ... | NS16550AF |  91Kb/8P | A Comparison of the INS8250, NS16450 and NS16550AF Series of UARTs April 1989 |
 National Semiconductor ... | NS16550AF |  91Kb/8P | A Comparison of the INS8250, NS16450 and NS16550AF Series of UARTs April 1989 |
| NS16550 |  91Kb/8P | A Comparison of the INS8250, NS16450 and NS16550AF Series of UARTs April 1989 |
| NS16552V |  827Kb/22P | Dual Universal Asynchronous Receiver/Transmitter with FIFOs |
 National Semiconductor ... | NS16450 |  91Kb/8P | A Comparison of the INS8250, NS16450 and NS16550AF Series of UARTs April 1989 |
| NS16450 |  673Kb/18P | PC16450C/NS16450,PC8250A/INS8250A UNIVERSAL ASYNCHRONOUS RECEIVER/TRANSMITTER |
| NS16C2552 |  906Kb/43P | Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate |
 National Semiconductor ... | NS16C2552TVA |  906Kb/43P | Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate |
 National Semiconductor ... | NS16C2752 |  906Kb/43P | Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate |