# ESP32-S3-WROOM-1-N8R8

**Espressif Systems** · WiFi Modules · ESP32-S3-WROOM-1

ESP32-S3-WROOM-1-N8R8 from Espressif Systems, in a ESP32-S3-WROOM-1. 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 | GND | power_in | Ground connection of the module. |
| 2 | 3V3 | power_in | Module power supply pin. |
| 3 | EN | input | Chip enable: High turns the chip on and Low powers it off; the pin must not be left floating. |
| 4 | IO4 | bidirectional | GPIO4 with RTC_GPIO4, TOUCH4 and ADC1_CH3 alternate functions. |
| 5 | IO5 | bidirectional | GPIO5 with RTC_GPIO5, TOUCH5 and ADC1_CH4 alternate functions. |
| 6 | IO6 | bidirectional | GPIO6 with RTC_GPIO6, TOUCH6 and ADC1_CH5 alternate functions. |
| 7 | IO7 | bidirectional | GPIO7 with RTC_GPIO7, TOUCH7 and ADC1_CH6 alternate functions. |
| 8 | IO15 | bidirectional | GPIO15 with RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P alternate functions. |
| 9 | IO16 | bidirectional | GPIO16 with RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N alternate functions. |
| 10 | IO17 | bidirectional | GPIO17 with RTC_GPIO17, U1TXD and ADC2_CH6 alternate functions. |
| 11 | IO18 | bidirectional | GPIO18 with RTC_GPIO18, U1RXD, ADC2_CH7 and CLK_OUT3 alternate functions. |
| 12 | IO8 | bidirectional | GPIO8 with RTC_GPIO8, TOUCH8, ADC1_CH7 and SUBSPICS1 alternate functions. |
| 13 | IO19 | bidirectional | GPIO19 with RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D- alternate functions. |
| 14 | IO20 | bidirectional | GPIO20 with RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+ alternate functions. |
| 15 | IO3 | bidirectional | GPIO3 with RTC_GPIO3, TOUCH3 and ADC1_CH2 alternate functions; strapping pin for JTAG signal source, floating by default (Table 4-1). |
| 16 | IO46 | bidirectional | GPIO46 general-purpose I/O; strapping pin for chip boot mode and ROM message printing, with weak pull-down by default (Table 4-1). |
| 17 | IO9 | bidirectional | GPIO9 with RTC_GPIO9, TOUCH9, ADC1_CH8, FSPIHD and SUBSPIHD alternate functions. |
| 18 | IO10 | bidirectional | GPIO10 with RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 and SUBSPICS0 alternate functions. |
| 19 | IO11 | bidirectional | GPIO11 with RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 and SUBSPID alternate functions. |
| 20 | IO12 | bidirectional | GPIO12 with RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 and SUBSPICLK alternate functions. |
| 21 | IO13 | bidirectional | GPIO13 with RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 and SUBSPIQ alternate functions. |
| 22 | IO14 | bidirectional | GPIO14 with RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS and SUBSPIWP alternate functions. |
| 23 | IO21 | bidirectional | GPIO21 with RTC_GPIO21 alternate function. |
| 24 | IO47 | bidirectional | GPIO47 with SPICLK_P_DIFF and SUBSPICLK_P_DIFF alternate functions; on ESP32-S3R16V modules it operates at 1.8 V instead of 3.3 V (footnote c). |
| 25 | IO48 | bidirectional | GPIO48 with SPICLK_N_DIFF and SUBSPICLK_N_DIFF alternate functions; on ESP32-S3R16V modules it operates at 1.8 V instead of 3.3 V (footnote c). |
| 26 | IO45 | bidirectional | GPIO45 general-purpose I/O; strapping pin for VDD_SPI voltage, with weak pull-down by default (Table 4-1). |
| 27 | IO0 | bidirectional | RTC_GPIO0 and GPIO0; strapping pin for chip boot mode, with weak pull-up by default (Table 4-1). |
| 28 | IO35 | bidirectional | GPIO35 with SPIIO6, FSPID and SUBSPID alternate functions; the default function is set by eFuse, and on modules embedded with ESP32-S3R8 or ESP32-S3R16V it is connected to Octal SPI PSRAM and not available for other uses (footnote b). |
| 29 | IO36 | bidirectional | GPIO36 with SPIIO7, FSPICLK and SUBSPICLK alternate functions; the default function is set by eFuse, and on modules embedded with ESP32-S3R8 or ESP32-S3R16V it is connected to Octal SPI PSRAM and not available for other uses (footnote b). |
| 30 | IO37 | bidirectional | GPIO37 with SPIDQS, FSPIQ and SUBSPIQ alternate functions; the default function is set by eFuse, and on modules embedded with ESP32-S3R8 or ESP32-S3R16V it is connected to Octal SPI PSRAM and not available for other uses (footnote b). |
| 31 | IO38 | bidirectional | GPIO38 with FSPIWP and SUBSPIWP alternate functions. |
| 32 | IO39 | bidirectional | GPIO39 with MTCK, CLK_OUT3 and SUBSPICS1 alternate functions. |
| 33 | IO40 | bidirectional | GPIO40 with MTDO and CLK_OUT2 alternate functions. |
| 34 | IO41 | bidirectional | GPIO41 with MTDI and CLK_OUT1 alternate functions. |
| 35 | IO42 | bidirectional | GPIO42 with MTMS alternate function. |
| 36 | RXD0 | bidirectional | UART0 receive (U0RXD) with GPIO44 and CLK_OUT2 alternate functions. |
| 37 | TXD0 | bidirectional | UART0 transmit (U0TXD) with GPIO43 and CLK_OUT1 alternate functions. |
| 38 | IO2 | bidirectional | GPIO2 with RTC_GPIO2, TOUCH2 and ADC1_CH1 alternate functions. |
| 39 | IO1 | bidirectional | GPIO1 with RTC_GPIO1, TOUCH1 and ADC1_CH0 alternate functions. |
| 40 | GND | power_in | Ground connection of the module. |
| 41 | EPAD | power_in | Exposed ground pad; soldering it to the base board ground is optional and improves thermal performance, with the datasheet warning that excess solder paste can weaken adhesion of other pins. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | ESP32-S3-WROOM-1 |
| Category | IoT/Communication Modules |
| Pins | 41 |

## 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 |  | 27 |
| Storage temperature | TSTORE | -40 |  | 105 | °C |  | 27 |
| Power supply voltage | VDD33 | 3 | 3.3 | 3.6 | V |  | 27 |
| Current delivered by external power supply | IVDD | 0.5 |  |  | A |  | 27 |
| Operating ambient temperature | TA | -40 |  | 65 | °C | 65 °C version | 27 |
| High-level input current | IIH |  |  | 50 | nA |  | 27 |
| Low-level input current | IIL |  |  | 50 | nA |  | 27 |
| Low-level input voltage | VIL | -0.3 |  |  | V |  | 27 |
| Power supply voltage (1.8 V) | VCC | 1.62 | 1.8 | 1.98 | V | Power supply voltage (1.8 V) for PSRAM | 31 |
| Power supply voltage (3.3 V) | VCC | 2.7 | 3.3 | 3.6 | V | Power supply voltage (3.3 V) for PSRAM | 31 |
| Maximum clock frequency | FC | 80 |  |  | MHz | PSRAM | 31 |
| RF transmit power range |  | -24 |  | 20 | dBm | Bluetooth LE | 34 |

## 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) | 47 |

## CAD (KiCad official)

- Symbol: `ESP32-S3-WROOM-1-N8R8`
- Footprint: `PCM_Espressif:ESP32-S3-WROOM-1`
- 3D model: ESP32-S3-WROOM-1 (KiCad packages3D, STEP)
- 3D model files: `esp32-s3-wroom-1-n8r8-etched.step` / `esp32-s3-wroom-1-n8r8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esp32-s3-wroom-1-n8r8.step` / `esp32-s3-wroom-1-n8r8.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-s3-wroom-1_wroom-1u_datasheet_en.pdf) (53 pp, sha256 `27d71971da07c280`, retrieved 2026-10-28, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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-s3-wroom-1-n8r8-datasheet.pdf)