Overview
The FT221XQ-R is a USB Converter made by FTDI in a QFN-20(4x4) package with 21 pins. -40℃~+85℃ 3.3V~5V USB to SPI QFN-20(4x4) USB Converters ROHS.
PCBKit's library has its KiCad symbol (Interface_USB:FT221XQ, from KiCad's library) and its footprint (Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm, from KiCad's library), ready for a KiCad board. JLCPCB lists it (part C2678103).
Symbol
Footprint
Parameters
4- Applications Function
- USB to SPI
- Features
- FIFO buffer；Built-in clock generator；Power-on reset
- Operating Temperature
- -40℃~+85℃
- Voltage - Supply
- 3.3V~5V
Order codes
1- FT221XQ-RLCSC C2678103
Pinout
21| Pin | Name | Type |
|---|---|---|
| 1 | MIOSI1 | Input |
| 2 | MIOSI7 | Input |
| 3 | GND | Power in |
| 4 | MIOSI5 | Input |
| 5 | MIOSI6 | Input |
| 6 | MIOSI3 | Input |
| 7 | MISO | Input |
| 8 | USBDP | Input/output |
| 9 | USBDM | Input/output |
| 10 | 3V3OUT | Power out |
| 11 | RESET | Input |
| 12 | VCC | Power in |
| 13 | GND | Power in |
| 14 | CS | Input |
| 15 | CLK | Input |
| 16 | CBUS3 | Input/output |
| 17 | MIOSI0 | Input |
| 18 | MIOSI4 | Input |
| 19 | MIOSI2 | Input |
| 20 | VCCIO | Power in |
| 21 | GND | Power in |
Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/ftdi/FT221XQ-R" title="FT221XQ-R in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/ftdi/FT221XQ-R.jpg" alt="FT221XQ-R" width="1200" height="900">[](https://pcbkit.io/parts/ftdi/FT221XQ-R)Questions
Is there a KiCad symbol and footprint for the FT221XQ-R?
Yes. The symbol is Interface_USB:FT221XQ and the footprint Package_DFN_QFN:QFN-20-1EP_4x4mm_P0.5mm_EP2.5x2.5mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the FT221XQ-R?
QFN-20(4x4), with 21 pins. Its footprint is drawn on this page.
Where is the FT221XQ-R datasheet?
FTDI publishes it: the Datasheet link on this page opens it.
Where can I order the FT221XQ-R?
JLCPCB lists it as part C2678103, with 0 in stock; the sellers' links on this page open their listings.
What can replace the FT221XQ-R?
Parts like it in the library: the FT231XQ-R by FTDI and the FT231XQ-T by FTDI. Check their datasheets: a part that fits the footprint may still differ in its ratings.
