| Vendor | Part Number | Microcontroller |
| Silicon Laboratories | CP2101CP2102CP2103 | NoNoNo |
| FTDI | FT232R (single)FT2232D (dual) | NoNo |
| Prolific | PL2303PL2313 (dual) | No |
| Linx Technologies | SDM-USB-QS-S module | No |
| Texas Instrument | TUSB3410 | Yes |
| Moschip Semiconductor | MCS7703 | No |