| Pin | Symbol | Type | Function (EN) |
|---|---|---|---|
| 1 | VDD33 | Power | Power Supply Input (VDD33 — 3.3V / 5.0V Standard Logic) |
| 2 | PA0 | I/O | Multiplexed I/O & Peripheral Pin PA0 (UART, I2C, SWD/JTAG) |
| 3 | PA1 | I/O | Multiplexed I/O & Peripheral Pin PA1 (UART, I2C, SWD/JTAG) |
| 4 | PA7 | I/O | Multiplexed I/O & Peripheral Pin PA7 (UART, SPI, PWM) |
| 5 | PA7/T4/TMR | I/O | Multiplexed I/O & Peripheral Pin PA7/T4/TMR (General) |
| 6 | XI | I/O | Multiplexed I/O & Peripheral Pin XI (RTC/CLK) |
| 7 | GND | GND | Ground Reference Pin (GND) |
| 8 | V5 | I/O | Multiplexed I/O & Peripheral Pin V5 (General) |
| 9 | PA9 | I/O | Multiplexed I/O & Peripheral Pin PA9 (UART, I2C) |
| 10 | PA8 | I/O | Multiplexed I/O & Peripheral Pin PA8 (UART, I2C, PWM) |
| 11 | PA0 | I/O | Multiplexed I/O & Peripheral Pin PA0 (UART, SWD/JTAG) |
| Designator / Replacement MPN | Value / Package | Function & PCB Layout Rule |
|---|---|---|
| N/A BOM | Per application circuit DFN-10(3x3) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Manufactured by WCH, the CH570Q is housed in a DFN-10(3x3) package with 11 pins and a 0.50 mm lead pitch. Key pins include: 1 (VDD33: Power Supply Input (VDD33 — 3.3V / 5.0V Standard Logic)), 2 (PA0: Multiplexed I/O & Peripheral Pin PA0 (UART, I2C, SWD/JTAG)), 3 (PA1: Multiplexed I/O & Peripheral Pin PA1 (UART, I2C, SWD/JTAG)), 4 (PA7: Multiplexed I/O & Peripheral Pin PA7 (UART, SPI, PWM)), 5 (PA7/T4/TMR: Multiplexed I/O & Peripheral Pin PA7/T4/TMR (General)), 6 (XI: Multiplexed I/O & Peripheral Pin XI (RTC/CLK)).
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), CH570Q (DFN-10(3x3)) has a nominal body envelope of 3.00 × 3.00 mm, pitch e = 0.50 mm, and 11 copper pads plus a central exposed thermal pad (EPAD) of 2.50 × 1.60 mm with a 60% IPC-7525 windowed solder paste grid.
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for CH570Q (WCH, DFN-10(3x3)) 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.
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | VDD33 | Power_In | Primary positive power supply input (VDD33) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 2 | PA0 | Digital_IO | Signal terminal PA0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA0. Supported peripheral buses: UART, I2C, SWD/JTAG. |
| 3 | PA1 | Digital_IO | Signal terminal PA1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA1. Supported peripheral buses: UART, I2C, SWD/JTAG. |
| 4 | PA7 | Digital_IO | Signal terminal PA7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA7. Supported peripheral buses: UART, SPI, PWM. |
| 5 | PA7/T4/TMR | Digital_IO | Signal terminal PA7/T4/TMR (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA7/T4/TMR. Supported peripheral buses: General. |
| 6 | XI | Digital_IO | Signal terminal XI (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: XI. Supported peripheral buses: RTC/CLK. |
| 7 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 8 | V5 | Digital_IO | Signal terminal V5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: V5. Supported peripheral buses: General. |
| 9 | PA9 | Digital_IO | Signal terminal PA9 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA9. Supported peripheral buses: UART, I2C. |
| 10 | PA8 | Digital_IO | Signal terminal PA8 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA8. Supported peripheral buses: UART, I2C, PWM. |
| 11 | PA0 | Digital_IO | Signal terminal PA0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PA0. Supported peripheral buses: UART, SWD/JTAG. |