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ESP32-C3-WROOM-02-N4
Public Made by Adomby adom
Espressif Systems WiFi Modules, VFQFN-32-EP. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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ESP32-C3-WROOM-02-N4
Espressif Systems · WiFi Modules · VFQFN-32-EP
ESP32-C3-WROOM-02-N4 from Espressif Systems, in a VFQFN-32-EP. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 3V3 | power_in | Module power supply, 3.0 to 3.6 V (3.3 V typ) with at least 0.5 A delivered by the external supply. |
| 2 | EN | input | Chip enable: high turns the chip on, low powers it off; must not be left floating. |
| 3 | IO4 | bidirectional | GPIO4 with ADC1_CH4, FSPIHD and MTMS functions. |
| 4 | IO5 | bidirectional | GPIO5 with ADC2_CH0, FSPIWP and MTDI functions. |
| 5 | IO6 | bidirectional | GPIO6 with FSPICLK and MTCK functions. |
| 6 | IO7 | bidirectional | GPIO7 with FSPID and MTDO functions. |
| 7 | IO8 | bidirectional | GPIO8, a strapping pin (floating by default) that also controls ROM message printing. |
| 8 | IO9 | bidirectional | GPIO9, a strapping pin with weak pull-up by default (SPI boot); low selects Joint Download Boot mode. |
| 9 | GND | power_in | Ground. |
| 10 | IO10 | bidirectional | GPIO10 with FSPICS0 function. |
| 11 | RXD | bidirectional | GPIO20 / U0RXD, UART0 receive used for firmware download and log output. |
| 12 | TXD | bidirectional | GPIO21 / U0TXD, UART0 transmit used for firmware download and log output. |
| 13 | IO18 | bidirectional | GPIO18 with USB_D- function for the USB Serial/JTAG controller. |
| 14 | IO19 | bidirectional | GPIO19 with USB_D+ function for the USB Serial/JTAG controller. |
| 15 | IO3 | bidirectional | GPIO3 with ADC1_CH3 function. |
| 16 | IO2 | bidirectional | GPIO2, a strapping pin (floating by default, recommended pulled up) with ADC1_CH2 and FSPIQ functions. |
| 17 | IO1 | bidirectional | GPIO1 with ADC1_CH1 and XTAL_32K_N functions. |
| 18 | IO0 | bidirectional | GPIO0 with ADC1_CH0 and XTAL_32K_P functions. |
| 19 | GND | power_in | Ground exposed pad (EPAD); soldering to board ground is optional but improves thermal performance. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | VFQFN-32-EP |
| Category | IoT/Communication Modules |
| Pins | 19 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage | VDD33 | -0.3 | 3.6 | V | 22 | ||
| Storage temperature | TSTORE | -40 | 105 | °C | 22 | ||
| Power supply voltage | VDD33 | 3 | 3.3 | 3.6 | V | 22 | |
| Current delivered by external power supply | IVDD | 0.5 | A | 22 | |||
| Operating ambient temperature | TA | -40 | 85 | °C | 85 °C version | 22 | |
| High-level input current | IIH | 50 | nA | 22 | |||
| Low-level input current | IIL | 50 | nA | 22 | |||
| Power supply voltage (1.8 V) | VCC | 1.65 | 1.8 | 2 | V | 24 | |
| Power supply voltage (3.3 V) | VCC | 2.7 | 3.3 | 3.6 | V | 24 | |
| Maximum clock frequency | FC | 80 | MHz | 24 | |||
| Program/erase cycles | 100000 | cycles | 24 | ||||
| Data retention time | TRET | 20 | years | 24 | |||
| Page program time | TPP | 0.8 | 5 | ms | 24 | ||
| Sector erase time (4 KB) | TSE | 70 | 500 | ms | 24 | ||
| Block erase time (32 KB) | TBE1 | 0.2 | 2 | s | 24 | ||
| Block erase time (64 KB) | TBE2 | 0.3 | 3 | s | 24 | ||
| Chip erase time (32 Mb) | TCE | 20 | 60 | s | 24 |
Materials and finish
As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | tin | Solder: Sn-Ag-Cu (SAC305) lead-free solder Temperature (°C) | 40 |
CAD (KiCad official)
- Symbol:
ESP32-C3-WROOM-02-N4 - Footprint:
PCM_Espressif:ESP32-C3-WROOM-02 - 3D model: VFQFN-32-EP (KiCad packages3D, STEP)
- 3D model files:
esp32-c3-wroom-02-n4-etched.step/esp32-c3-wroom-02-n4-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esp32-c3-wroom-02-n4.step/esp32-c3-wroom-02-n4.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Espressif Systems datasheet (47 pp, sha256
2375b1be75ebbfcf, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# ESP32-C3-WROOM-02-N4
**Espressif Systems** · WiFi Modules · VFQFN-32-EP
ESP32-C3-WROOM-02-N4 from Espressif Systems, in a VFQFN-32-EP. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | 3V3 | power_in | Module power supply, 3.0 to 3.6 V (3.3 V typ) with at least 0.5 A delivered by the external supply. |
| 2 | EN | input | Chip enable: high turns the chip on, low powers it off; must not be left floating. |
| 3 | IO4 | bidirectional | GPIO4 with ADC1_CH4, FSPIHD and MTMS functions. |
| 4 | IO5 | bidirectional | GPIO5 with ADC2_CH0, FSPIWP and MTDI functions. |
| 5 | IO6 | bidirectional | GPIO6 with FSPICLK and MTCK functions. |
| 6 | IO7 | bidirectional | GPIO7 with FSPID and MTDO functions. |
| 7 | IO8 | bidirectional | GPIO8, a strapping pin (floating by default) that also controls ROM message printing. |
| 8 | IO9 | bidirectional | GPIO9, a strapping pin with weak pull-up by default (SPI boot); low selects Joint Download Boot mode. |
| 9 | GND | power_in | Ground. |
| 10 | IO10 | bidirectional | GPIO10 with FSPICS0 function. |
| 11 | RXD | bidirectional | GPIO20 / U0RXD, UART0 receive used for firmware download and log output. |
| 12 | TXD | bidirectional | GPIO21 / U0TXD, UART0 transmit used for firmware download and log output. |
| 13 | IO18 | bidirectional | GPIO18 with USB_D- function for the USB Serial/JTAG controller. |
| 14 | IO19 | bidirectional | GPIO19 with USB_D+ function for the USB Serial/JTAG controller. |
| 15 | IO3 | bidirectional | GPIO3 with ADC1_CH3 function. |
| 16 | IO2 | bidirectional | GPIO2, a strapping pin (floating by default, recommended pulled up) with ADC1_CH2 and FSPIQ functions. |
| 17 | IO1 | bidirectional | GPIO1 with ADC1_CH1 and XTAL_32K_N functions. |
| 18 | IO0 | bidirectional | GPIO0 with ADC1_CH0 and XTAL_32K_P functions. |
| 19 | GND | power_in | Ground exposed pad (EPAD); soldering to board ground is optional but improves thermal performance. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | VFQFN-32-EP |
| Category | IoT/Communication Modules |
| Pins | 19 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Power supply voltage | VDD33 | -0.3 | | 3.6 | V | | 22 |
| Storage temperature | TSTORE | -40 | | 105 | °C | | 22 |
| Power supply voltage | VDD33 | 3 | 3.3 | 3.6 | V | | 22 |
| Current delivered by external power supply | IVDD | 0.5 | | | A | | 22 |
| Operating ambient temperature | TA | -40 | | 85 | °C | 85 °C version | 22 |
| High-level input current | IIH | | | 50 | nA | | 22 |
| Low-level input current | IIL | | | 50 | nA | | 22 |
| Power supply voltage (1.8 V) | VCC | 1.65 | 1.8 | 2 | V | | 24 |
| Power supply voltage (3.3 V) | VCC | 2.7 | 3.3 | 3.6 | V | | 24 |
| Maximum clock frequency | FC | 80 | | | MHz | | 24 |
| Program/erase cycles | | 100000 | | | cycles | | 24 |
| Data retention time | TRET | 20 | | | years | | 24 |
| Page program time | TPP | | 0.8 | 5 | ms | | 24 |
| Sector erase time (4 KB) | TSE | | 70 | 500 | ms | | 24 |
| Block erase time (32 KB) | TBE1 | | 0.2 | 2 | s | | 24 |
| Block erase time (64 KB) | TBE2 | | 0.3 | 3 | s | | 24 |
| Chip erase time (32 Mb) | TCE | | 20 | 60 | s | | 24 |
## Materials and finish
As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).
| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts | | tin | Solder: Sn-Ag-Cu (SAC305) lead-free solder Temperature (°C) | 40 |
## CAD (KiCad official)
- Symbol: `ESP32-C3-WROOM-02-N4`
- Footprint: `PCM_Espressif:ESP32-C3-WROOM-02`
- 3D model: VFQFN-32-EP (KiCad packages3D, STEP)
- 3D model files: `esp32-c3-wroom-02-n4-etched.step` / `esp32-c3-wroom-02-n4-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esp32-c3-wroom-02-n4.step` / `esp32-c3-wroom-02-n4.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Espressif Systems datasheet](https://www.espressif.com/sites/default/files/documentation/esp32-c3-wroom-02_datasheet_en.pdf) (47 pp, sha256 `2375b1be75ebbfcf`, retrieved 2026-10-28, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/esp32-c3-wroom-02-n4-datasheet.pdf)