
Mainboard gen2
zephray/NekoInk
Next gen. of NekoCal: An open-source hackable and programmable e-paper display

The USB3300-EZK is a USB Converter made by Microchip Technology in a QFN-32-EP(5x5) package with 33 pins. -40℃~+85℃ 3V~3.6V 54.7mA 83uA Controller USB 2.0 QFN-32-EP(5x5) USB Converters ROHS.
PCBKit's library has its KiCad symbol (Interface_USB:USB3300-EZK, from KiCad's library) and its footprint (Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm, from KiCad's library), ready for a KiCad board. 945 are in stock at JLCPCB (part C108954). 27 open-source boards in 25 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | GND | Power in |
| 2 | GND | Power in |
| 3 | CPEN | Output |
| 4 | VBUS | Power in |
| 5 | ID | Input |
| 6 | VDD3.3 | Power in |
| 7 | DP | Input/output |
| 8 | DM | Input/output |
| 9 | RESET | Input |
| 10 | EXTVBUS | Input |
| 11 | NXT | Output |
| 12 | DIR | Output |
| 13 | STP | Input |
| 14 | CLKOUT | Output |
| 15 | VDD1.8 | Power out |
| 16 | VDD3.3 | Power in |
| 17 | DATA7 | Input/output |
| 18 | DATA6 | Input/output |
| 19 | DATA5 | Input/output |
| 20 | DATA4 | Input/output |
| 21 | DATA3 | Input/output |
| 22 | DATA2 | Input/output |
| 23 | DATA1 | Input/output |
| 24 | DATA0 | Input/output |
| 25 | VDD3.3 | Power in |
| 26 | VDD1.8 | Power out |
| 27 | XO | Output |
| 28 | XI | Input |
| 29 | VDDA1.8 | Power out |
| 30 | VDD3.3 | Power in |
| 31 | REG_EN | Input/output |
| 32 | RBIAS | Passive |
| 33 | GND | Power in |

zephray/NekoInk
Next gen. of NekoCal: An open-source hackable and programmable e-paper display


luantty2/akeypad
8khz polling rate keypad, uses STM32F405 and USB3300, powered by QMK.





<iframe src="https://pcbkit.io/embed/parts/microchip/USB3300-EZK" title="USB3300-EZK in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/microchip/USB3300-EZK.jpg" alt="USB3300-EZK" width="1200" height="900">[](https://pcbkit.io/parts/microchip/USB3300-EZK)Yes. The symbol is Interface_USB:USB3300-EZK and the footprint Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.45x3.45mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
QFN-32-EP(5x5), with 33 pins. Its footprint is drawn on this page.
Microchip Technology publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C108954, with 945 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the USB3300-EZK-TR by Microchip Technology, the CY7C65215-32LTXI by Infineon Technologies, the CY7C65213A-32LTXI by Infineon Technologies and the CY7C65213-32LTXI by Infineon Technologies. Check their datasheets: a part that fits the footprint may still differ in its ratings.
27 boards in 25 repositories on GitHub; the most starred are listed on this page, with their KiCad files.