| XR16L2551 | Exar | Industry Smallest Package UART with 2.25V to 5.5V Operation, Intel/Motorola Data Bus Interfaces Select and Exclusive PowerSave Feature |
| XR16L2552 | Exar | Industry Smallest Package UART with 2.25V to 5.5V Operation |
| XR16L2750 | Exar | High-Performance 2.25V - 5.5V DUART |
| XR16L2751 | Exar | High-Performance 2.25V - 5.5V DUART |
| XR16L2752 | Exar | High-Performance 2.25V - 5.5V DUART |
| XR16L580 | Exar | Smallest 2.25 to 5.5V UART with 16-Byte FIFO and Power-Save |
| XR16L651 | Exar | 2.5V, 3.3V and 5V Low Power UART with 32-Byte FIFO |
| XR16L784 | Exar | High Performance 5V and 3.3V Quad UART |
| XR16L788 | Exar | High-Performance 3.3V Octal UART |
| XR17C152 | Exar | 5-Volt PCI Bus Dual UART |
| XR17C154 | Exar | 5V PCI Bus Quad UART |
| XR17C158 | Exar | Eight Channel, 5V, PCI Bus UART |
| XR17D152 | Exar | Universal (3.3V and 5V) PCCI Bus Dual UART |
| XR17D154 | Exar | Universal (3.3V and 5V) PCI Bus Quad UART |
| XR17D158 | Exar | Universal (3.3V and 5V) PCI Bus Octal UART |
| XR17L152 | Exar | 3.3V Multi-Channel Dual Quad PCI Bus Universal Asynchronous Receiver and Transmitter (UART) |
| XR17L154 | Exar | 3.3V Multi-Channel Dual Quad PCI Bus Universal Asynchronous Receiver and Transmitter (UART) |
| XR68C192 | Exar | Dual UART with 16 Bytes Transmit and Receive FIFO |
| XR68C681 | Exar | Dual UART with Two Fully Independent Full Duplex Asynchronous Communications Channels |
| XR68C92 | Exar | Dual UART with Eight Bytes Transmit and Receive FIFO |