XR68C681 и другие
| Компонент | Описание | Производитель | |
| XR68C681 | CMOS Dual Channel UART (DUART) |
Exar Corporation |
 |
| XR68C681CJ | CMOS Dual Channel UART (DUART) |
Exar Corporation |
|
| XR68C681CP | CMOS Dual Channel UART (DUART) |
Exar Corporation |
|
| XR68C681J | CMOS Dual Channel UART (DUART) |
Exar Corporation |
|
| XR68C681N | CMOS Dual Channel UART (DUART) |
Exar Corporation |
|
| XR68C681P | CMOS Dual Channel UART (DUART) |
Exar Corporation |
|