Mechanical Dimensions & Land Pattern (SMD,25.5x18mm)
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 |
|---|---|---|
| C1, C2 BOM | 22µF (or 10µF) X5R + 100nF X7R 0805 + 0402 | 3V3 supply decoupling for ~500mA Wi-Fi TX bursts — place closest to 3V3 pin; supply must deliver >= 600mA. |
| R_en + C_en BOM | R = 10kΩ to 3V3 + C = 1µF to GND 0402 / 0603 | Power-On Reset RC delay at EN (CHIP_PU) — 1µF capacitor at EN is REQUIRED for reliable cold boot. |
| R_boot + SW1 BOM | 10kΩ Pull-up + BOOT button 0402 + SMD | Firmware boot-mode strap (IO0 on ESP32/S2/S3, IO9 on ESP32-C3) — on C3 pull IO8 high via 10kΩ for UART/USB download. |
| D_esd BOM | USBLC6-2SC6 / LESD5D5.0CT1G SOT-23-6 / SOD-523 | ESD surge protection on USB D+/D- — place right next to USB Type-C connector before IO18/IO19/IO20. |
| ESP32-S3-MINI-1-N8 / 1U-N4R2 Espressif | 100% Drop-in | Same 15.4×15.4mm 65-pad footprint as ESP32-S2-MINI-2 — verify USB GPIO 19/20 pin mapping. |
Technical Frequently Asked Questions (FAQ) — ESP32-C6-WROOM-1-N8 (SMD,25.5x18mm)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of ESP32-C6-WROOM-1-N8 (SMD,25.5x18mm)?
Manufactured by ESPRESSIF, the ESP32-C6-WROOM-1-N8 is housed in a SMD,25.5x18mm package with 37 pins and a 1.27 mm lead pitch, supporting a VCC supply range of 3.0 ~ 3.6 V. Key pins include: 1 (GPIO9: Multiplexed I/O & Peripheral Pin GPIO9 (General)), 2 (3V3: Power Supply Input (3V3 — 3.3V VDD3P3 (3.0V ~ 3.6V))), 3 (EN: System Enable & Hardware Reset (EN)), 4 (IO4: Multiplexed I/O & Peripheral Pin IO4 (UART, SPI, ADC, SWD/JTAG)), 5 (IO5: Multiplexed I/O & Peripheral Pin IO5 (UART, SPI, ADC, SWD/JTAG)), 6 (IO6: Multiplexed I/O & Peripheral Pin IO6 (SPI, I2C, ADC, SWD/JTAG)).
What are the IPC-7351B PCB Footprint dimensions for ESP32-C6-WROOM-1-N8?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), ESP32-C6-WROOM-1-N8 (SMD,25.5x18mm) has a nominal body envelope of 18.00 × 25.50 mm, pitch e = 1.27 mm, and 37 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for ESP32-C6-WROOM-1-N8?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for ESP32-C6-WROOM-1-N8 (ESPRESSIF, SMD,25.5x18mm) 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 (37 pins) & ESP32-C6-WROOM Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | GPIO9 | Digital_IO | Signal terminal GPIO9 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO9. Supported peripheral buses: General. |
| 2 | 3V3 | Power_In | Primary positive power supply input (3V3) operating in the 3.3V VDD3P3 (3.0V ~ 3.6V) domain (Max rating: 3.6V). |
| 3 | EN | Digital_IO | Chip enable and power-on reset control input (EN): High enables the SoC; Low powers down the chip into reset. |
| 4 | IO4 | Digital_IO | Signal terminal IO4 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: MTMS, GPIO4, ADC1_CH4, FSPIHD. Supported peripheral buses: UART, SPI, ADC, SWD/JTAG. |
| 5 | IO5 | Digital_IO | Signal terminal IO5 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: MTDI, GPIO5, ADC1_CH5, FSPIWP. Supported peripheral buses: UART, SPI, ADC, SWD/JTAG. |
| 6 | IO6 | Digital_IO | Signal terminal IO6 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: MTCK, GPIO6, I2C_SDA, ADC1_CH6, FSPICLK. Supported peripheral buses: SPI, I2C, ADC, SWD/JTAG. |
| 7 | IO7 | Digital_IO | Signal terminal IO7 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: MTDO, GPIO7, I2C_SCL, FSPID. Supported peripheral buses: SPI, I2C, SWD/JTAG. |
| 8 | IO0 | Digital_IO | Signal terminal IO0 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO0, ADC1_CH0. Supported peripheral buses: UART, ADC, RTC/CLK. |
| 9 | IO1 | Digital_IO | Signal terminal IO1 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO1, ADC1_CH1. Supported peripheral buses: UART, ADC, RTC/CLK. |
| 10 | IO8 | Digital_IO | Signal terminal IO8 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO8. Supported peripheral buses: General. |
| 11 | IO10 | Digital_IO | Signal terminal IO10 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO10. Supported peripheral buses: General. |
| 12 | IO11 | Digital_IO | Signal terminal IO11 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO11. Supported peripheral buses: General. |
| 13 | IO12 | Digital_IO | Signal terminal IO12 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO12. Supported peripheral buses: USB. |
| 14 | IO13 | Digital_IO | Signal terminal IO13 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO13. Supported peripheral buses: USB. |
| 15 | IO9 | Digital_IO | Signal terminal IO9 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO9. Supported peripheral buses: General. |
| 16 | IO18 | Digital_IO | Signal terminal IO18 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO18, FSPICS2. Supported peripheral buses: SPI. |
| 17 | IO19 | Digital_IO | Signal terminal IO19 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO19. Supported peripheral buses: SPI. |
| 18 | IO20 | Digital_IO | Signal terminal IO20 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO20, FSPICS4. Supported peripheral buses: SPI. |
| 19 | IO21 | Digital_IO | Signal terminal IO21 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO21, FSPICS5. Supported peripheral buses: SPI. |
| 20 | IO22 | Digital_IO | Signal terminal IO22 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO22. Supported peripheral buses: General. |
| 21 | IO23 | Digital_IO | Signal terminal IO23 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO23. Supported peripheral buses: General. |
| 22 | NC | NC | Signal terminal NC (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 23 | IO15 | Digital_IO | Signal terminal IO15 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO15. Supported peripheral buses: General. |
| 24 | RXD0 | Digital_IO | Signal terminal RXD0 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: U0RXD, GPIO17, FSPICS1. Supported peripheral buses: UART, SPI. |
| 25 | TXD0 | Digital_IO | Signal terminal TXD0 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: U0TXD, GPIO16, FSPICS0. Supported peripheral buses: UART, SPI. |
| 26 | IO3 | Digital_IO | Signal terminal IO3 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO3, ADC1_CH3. Supported peripheral buses: UART, ADC. |
| 27 | IO2 | Digital_IO | Signal terminal IO2 (I/O, 3.3V VDD3P3 (3.0V ~ 3.6V) domain). Multiplexed alternate functions: GPIO2, ADC1_CH2, FSPIQ. Supported peripheral buses: UART, SPI, ADC. |
| 28 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 29 | EPAD | GND | Bottom exposed die attach pad (EPAD) providing primary thermal conduction path to the PCB and low-inductance 0V ground return. |
| 30 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 31 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 32 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 33 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 34 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 35 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 36 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 37 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |











