| SC28L202 | Philips Semiconductors | Dual universal asynchronous receiver/transmitter (DUART) |
| SC28L91 | Philips Semiconductors | 3.3V-5.0V Universal Asynchronous Receiver/Transmitter (UART) |
| SC28L92 | Philips Semiconductors | 3.3V-5.0V Dual Universal Asynchronous Receiver/Transmitter (DUART) |
| SCC2691 | Philips Semiconductors | Universal asynchronous receiver/transmitter (UART) |
| SCC2692 | Philips Semiconductors | Dual asynchronous receiver/transmitter (DUART) |
| SCC2698B | Philips Semiconductors | Enhanced octal universal asynchronous receiver/transmitter (Octal UART) |
| SCC68692 | Philips Semiconductors | Dual asynchronous receiver/transmitter (DUART) |
| SCN2681 | Philips Semiconductors | Dual asynchronous receiver/transmitter (DUART) |
| SCN2681T | Philips Semiconductors | Dual asynchronous receiver/transmitter (DUART) |
| SCN68681 | Philips Semiconductors | Dual asynchronous receiver/transmitter (DUART) |
| ST16C1450 | Exar | UART with One Byte FIFO |
| ST16C1451 | Exar | UART with One Byte FIFO |
| ST16C1550 | Exar | UART with 16-Byte FIFOs |
| ST16C1551 | Exar | UART with 16-Byte FIFOs |
| ST16C2450 | Exar | Dual UART with Higher Operating Speed and Lower Access Time |
| ST16C2550 | Exar | Dual UART with 16-Byte Transmit and Receive FIFOs |
| ST16C2552 | Exar | Dual Universal Asynchronous Receiver and Transmitter (UART) |
| ST16C450 | Exar | UART with Higher Operating Speed and Lower Access Time |
| ST16C452 | Exar | Dual UART with Parallel Printer Port |
| ST16C452PS | Exar | Dual UART with Parallel Printer Port |