Mechanical Dimensions & Land Pattern (QFN-68(8x8))
Extracted from Datasheet & IPC-7351B NormalizedRecommended Companion BOM & Drop-In Equivalents
Passive external components per reference schematic and 1:1 pin-compatible alternatives| Designator / Replacement MPN | Value / Package | Function & PCB Layout Rule |
|---|---|---|
| N/A BOM | Per application circuit QFN-68(8x8) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — CH32V208WBU6 (QFN-68(8x8))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of CH32V208WBU6 (QFN-68(8x8))?
Manufactured by WCH, the CH32V208WBU6 is housed in a QFN-68(8x8) package with 69 pins and a 0.40 mm lead pitch. Key pins include: 1 (VBAT: Power Supply Input (VBAT — 3.3V / 5.0V Standard Logic)), 2 (PC13: Multiplexed I/O & Peripheral Pin PC13 (General)), 3 (PC14: Multiplexed I/O & Peripheral Pin PC14 (General)), 4 (PC15: Multiplexed I/O & Peripheral Pin PC15 (General)), 5 (VSSA: Ground Reference Pin (VSSA)), 6 (OSC_IN: Multiplexed I/O & Peripheral Pin OSC_IN (RTC/CLK)).
What are the IPC-7351B PCB Footprint dimensions for CH32V208WBU6?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), CH32V208WBU6 (QFN-68(8x8)) has a nominal body envelope of 8.00 × 8.00 mm, pitch e = 0.40 mm, and 69 copper pads plus a central exposed thermal pad (EPAD) of 6.40 × 6.40 mm with a 60% IPC-7525 windowed solder paste grid.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for CH32V208WBU6?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for CH32V208WBU6 (WCH, QFN-68(8x8)) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.
Static Reference Appendix: Pinout Table (69 pins) & CH32V208 / CH32V305 / CH32V307 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | VBAT | Power_In | Primary positive power supply input (VBAT) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 2 | PC13 | Digital_IO | Signal terminal PC13 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC13. Supported peripheral buses: General. |
| 3 | PC14 | Digital_IO | Signal terminal PC14 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC14. Supported peripheral buses: General. |
| 4 | PC15 | Digital_IO | Signal terminal PC15 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC15. Supported peripheral buses: General. |
| 5 | VSSA | GND | 0V electrical ground return terminal (VSSA) for internal core logic, I/O drivers, and analog sub-blocks. |
| 6 | OSC_IN | Digital_IO | Signal terminal OSC_IN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: OSC_IN. Supported peripheral buses: RTC/CLK. |
| 7 | OSC_OUT | Digital_IO | Signal terminal OSC_OUT (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: OSC_OUT. Supported peripheral buses: RTC/CLK. |
| 8 | NRST | Digital_IO | Active-low hardware reset terminal (NRST): pulling this pin Low resets the processor core and peripherals. |
| 9 | PC0 | Digital_IO | Signal terminal PC0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC0. Supported peripheral buses: General. |
| 10 | PC1 | Digital_IO | Signal terminal PC1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC1. Supported peripheral buses: General. |
| 11 | PC2 | Digital_IO | Signal terminal PC2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC2. Supported peripheral buses: General. |
| 12 | PC3 | Digital_IO | Signal terminal PC3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC3. Supported peripheral buses: General. |
| 13 | VDDA | Power_In | Primary positive power supply input (VDDA) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 14 | PA0 | Digital_IO | Signal terminal PA0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA0. Supported peripheral buses: General. |
| 15 | PA1 | Digital_IO | Signal terminal PA1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA1. Supported peripheral buses: General. |
| 16 | PA2 | Digital_IO | Signal terminal PA2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA2. Supported peripheral buses: General. |
| 17 | VIO_4 | Digital_IO | Signal terminal VIO_4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: VIO_4. Supported peripheral buses: General. |
| 18 | PD4 | Digital_IO | Signal terminal PD4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD4. Supported peripheral buses: General. |
| 19 | PA3 | Digital_IO | Signal terminal PA3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA3. Supported peripheral buses: General. |
| 20 | PA4 | Digital_IO | Signal terminal PA4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA4. Supported peripheral buses: General. |
| 21 | PA5 | Digital_IO | Signal terminal PA5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA5. Supported peripheral buses: General. |
| 22 | PA6 | Digital_IO | Signal terminal PA6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA6. Supported peripheral buses: General. |
| 23 | PA7 | Digital_IO | Signal terminal PA7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA7. Supported peripheral buses: General. |
| 24 | PC4 | Digital_IO | Signal terminal PC4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC4. Supported peripheral buses: General. |
| 25 | PC5 | Digital_IO | Signal terminal PC5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC5. Supported peripheral buses: General. |
| 26 | PB0 | Digital_IO | Signal terminal PB0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB0. Supported peripheral buses: General. |
| 27 | PB1 | Digital_IO | Signal terminal PB1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB1. Supported peripheral buses: General. |
| 28 | PB2 | Digital_IO | Signal terminal PB2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB2. Supported peripheral buses: General. |
| 29 | PB10 | Digital_IO | Signal terminal PB10 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB10. Supported peripheral buses: General. |
| 30 | PB11 | Digital_IO | Signal terminal PB11 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB11. Supported peripheral buses: General. |
| 31 | VIO_1 | Digital_IO | Signal terminal VIO_1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: VIO_1. Supported peripheral buses: General. |
| 32 | VDD_1 | Power_In | Primary positive power supply input (VDD_1) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 33 | PD5 | Digital_IO | Signal terminal PD5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD5. Supported peripheral buses: General. |
| 34 | PD6 | Digital_IO | Signal terminal PD6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD6. Supported peripheral buses: General. |
| 35 | PB12 | Digital_IO | Signal terminal PB12 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB12. Supported peripheral buses: General. |
| 36 | PB13 | Digital_IO | Signal terminal PB13 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB13. Supported peripheral buses: General. |
| 37 | PB14 | Digital_IO | Signal terminal PB14 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB14. Supported peripheral buses: General. |
| 38 | PB15 | Digital_IO | Signal terminal PB15 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB15. Supported peripheral buses: General. |
| 39 | PC6 | Digital_IO | Signal terminal PC6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC6. Supported peripheral buses: General. |
| 40 | PC7 | Digital_IO | Signal terminal PC7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC7. Supported peripheral buses: General. |
| 41 | PC8 | Digital_IO | Signal terminal PC8 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC8. Supported peripheral buses: General. |
| 42 | PC9 | Digital_IO | Signal terminal PC9 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC9. Supported peripheral buses: General. |
| 43 | PA8 | Digital_IO | Signal terminal PA8 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA8. Supported peripheral buses: General. |
| 44 | PA9 | Digital_IO | Signal terminal PA9 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA9. Supported peripheral buses: General. |
| 45 | PA10 | Digital_IO | Signal terminal PA10 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA10. Supported peripheral buses: General. |
| 46 | PA11 | Digital_IO | Signal terminal PA11 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA11. Supported peripheral buses: General. |
| 47 | PA12 | Digital_IO | Signal terminal PA12 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA12. Supported peripheral buses: General. |
| 48 | PA13 | Digital_IO | Signal terminal PA13 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA13. Supported peripheral buses: General. |
| 49 | VSS_2 | GND | Bottom exposed die attach pad (VSS_2) providing primary thermal conduction path to the PCB and low-inductance 0V ground return. |
| 50 | VINTA | Power_In | Primary positive power supply input (VINTA) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 51 | ANT | RF_50Ohm | Signal terminal ANT (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: ANT. Supported peripheral buses: General. |
| 52 | PA14 | Digital_IO | Signal terminal PA14 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA14. Supported peripheral buses: General. |
| 53 | PA15 | Digital_IO | Signal terminal PA15 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA15. Supported peripheral buses: General. |
| 54 | PC10 | Digital_IO | Signal terminal PC10 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC10. Supported peripheral buses: General. |
| 55 | PC11 | Digital_IO | Signal terminal PC11 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC11. Supported peripheral buses: General. |
| 56 | PC12 | Digital_IO | Signal terminal PC12 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PC12. Supported peripheral buses: General. |
| 57 | PD2 | Digital_IO | Signal terminal PD2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD2. Supported peripheral buses: General. |
| 58 | PB3 | Digital_IO | Signal terminal PB3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB3. Supported peripheral buses: General. |
| 59 | PB4 | Digital_IO | Signal terminal PB4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB4. Supported peripheral buses: General. |
| 60 | PB5 | Digital_IO | Signal terminal PB5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB5. Supported peripheral buses: General. |
| 61 | PB6 | Digital_IO | Signal terminal PB6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB6. Supported peripheral buses: General. |
| 62 | PB7 | Digital_IO | Signal terminal PB7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB7. Supported peripheral buses: General. |
| 63 | BOOT0 | Digital_IO | Signal terminal BOOT0 (I, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: BOOT0. Supported peripheral buses: General. |
| 64 | PB8 | Digital_IO | Signal terminal PB8 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PB8. Supported peripheral buses: General. |











