ESP32-S3-WROOM-1U-N4R8

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

ESP32-S3-WROOM-1U-N4R8 from Espressif Systems, in a ESP32-S3-WROOM-1U. 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 pin of the module.
2	3V3	power_in	Power supply input; Table 6-2 gives a module supply (VDD33) range of 3.0 V to 3.6 V with 3.3 V typical and at least 0.5 A from the external supply.
3	EN	input	Chip enable: high turns the chip on and low powers it off, and the pin must not be left floating.
4	IO4	bidirectional	Bidirectional GPIO4 with RTC_GPIO4, TOUCH4 and ADC1_CH3 alternate functions.
5	IO5	bidirectional	Bidirectional GPIO5 with RTC_GPIO5, TOUCH5 and ADC1_CH4 alternate functions.
6	IO6	bidirectional	Bidirectional GPIO6 with RTC_GPIO6, TOUCH6 and ADC1_CH5 alternate functions.
7	IO7	bidirectional	Bidirectional GPIO7 with RTC_GPIO7, TOUCH7 and ADC1_CH6 alternate functions.
8	IO15	bidirectional	Bidirectional GPIO15 with RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P alternate functions.
9	IO16	bidirectional	Bidirectional GPIO16 with RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N alternate functions.
10	IO17	bidirectional	Bidirectional GPIO17 with RTC_GPIO17, U1TXD and ADC2_CH6 alternate functions.
11	IO18	bidirectional	Bidirectional GPIO18 with RTC_GPIO18, U1RXD, ADC2_CH7 and CLK_OUT3 alternate functions.
12	IO8	bidirectional	Bidirectional GPIO8 with RTC_GPIO8, TOUCH8, ADC1_CH7 and SUBSPICS1 alternate functions.
13	IO19	bidirectional	Bidirectional GPIO19 with RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D- alternate functions.
14	IO20	bidirectional	Bidirectional GPIO20 with RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+ alternate functions.
15	IO3	bidirectional	Bidirectional GPIO3 with RTC_GPIO3, TOUCH3 and ADC1_CH2 alternate functions; it is a strapping pin for JTAG signal source selection.
16	IO46	bidirectional	Bidirectional GPIO46, which is also a strapping pin for chip boot mode and ROM message printing control.
17	IO9	bidirectional	Bidirectional GPIO9 with RTC_GPIO9, TOUCH9, ADC1_CH8, FSPIHD and SUBSPIHD alternate functions.
18	IO10	bidirectional	Bidirectional GPIO10 with RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 and SUBSPICS0 alternate functions.
19	IO11	bidirectional	Bidirectional GPIO11 with RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 and SUBSPID alternate functions.
20	IO12	bidirectional	Bidirectional GPIO12 with RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 and SUBSPICLK alternate functions.
21	IO13	bidirectional	Bidirectional GPIO13 with RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 and SUBSPIQ alternate functions.
22	IO14	bidirectional	Bidirectional GPIO14 with RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS and SUBSPIWP alternate functions.
23	IO21	bidirectional	Bidirectional GPIO21 with RTC_GPIO21 alternate function.
24	IO47	bidirectional	Bidirectional GPIO47 with SPICLK_P_DIFF and SUBSPICLK_P_DIFF alternate functions; its I/O works at 1.8 V only on modules with ESP32-S3R16V, not on this variant.
25	IO48	bidirectional	Bidirectional GPIO48 with SPICLK_N_DIFF and SUBSPICLK_N_DIFF alternate functions; its I/O works at 1.8 V only on modules with ESP32-S3R16V, not on this variant.
26	IO45	bidirectional	Bidirectional GPIO45, which is also a strapping pin setting the VDD_SPI voltage.
27	IO0	bidirectional	Bidirectional RTC_GPIO0/GPIO0, which is a strapping pin for chip boot mode with a weak internal pull-up.
28	IO35	bidirectional	Bidirectional GPIO35 with SPIIO6, FSPID and SUBSPID alternate functions; on modules with Octal SPI PSRAM (ESP32-S3R8 or ESP32-S3R16V) this pin is connected to the PSRAM and not available for other uses.
29	IO36	bidirectional	Bidirectional GPIO36 with SPIIO7, FSPICLK and SUBSPICLK alternate functions; on modules with Octal SPI PSRAM (ESP32-S3R8 or ESP32-S3R16V) this pin is connected to the PSRAM and not available for other uses.
30	IO37	bidirectional	Bidirectional GPIO37 with SPIDQS, FSPIQ and SUBSPIQ alternate functions; on modules with Octal SPI PSRAM (ESP32-S3R8 or ESP32-S3R16V) this pin is connected to the PSRAM and not available for other uses.
31	IO38	bidirectional	Bidirectional GPIO38 with FSPIWP and SUBSPIWP alternate functions.
32	IO39	bidirectional	Bidirectional GPIO39 with MTCK, CLK_OUT3 and SUBSPICS1 alternate functions (JTAG clock by default).
33	IO40	bidirectional	Bidirectional GPIO40 with MTDO and CLK_OUT2 alternate functions (JTAG data out by default).
34	IO41	bidirectional	Bidirectional GPIO41 with MTDI and CLK_OUT1 alternate functions (JTAG data in by default).
35	IO42	bidirectional	Bidirectional GPIO42 with MTMS alternate function (JTAG mode select by default).
36	RXD0	bidirectional	Bidirectional UART0 receive pin U0RXD (GPIO44, CLK_OUT2 alternate functions).
37	TXD0	bidirectional	Bidirectional UART0 transmit pin U0TXD (GPIO43, CLK_OUT1 alternate functions).
38	IO2	bidirectional	Bidirectional RTC_GPIO2/GPIO2 with TOUCH2 and ADC1_CH1 alternate functions.
39	IO1	bidirectional	Bidirectional RTC_GPIO1/GPIO1 with TOUCH1 and ADC1_CH0 alternate functions.
40	GND	power_in	Ground pin of the module.
41	EPAD	power_in	Exposed ground pad; soldering it to the base-board ground is optional but improves thermal performance, and excess solder paste can lift the module.

Key specifications

Parameter	Value
Manufacturer	Espressif Systems
Package	ESP32-S3-WROOM-1U
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 (absolute maximum)	VDD33	-0.3		3.6	V		27
Storage temperature	TSTORE	-40		105	°C		27
Power supply voltage (recommended)	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
Low-level input voltage	VIL	-0.3			V		27
Chip reset voltage (EN voltage is within the specified range)	VIL_nRST	-0.3			V	EN voltage is within the specified range	28
High-level input current	IIH			50	nA		27
Low-level input current	IIL			50	nA		27
Power supply voltage (3.3 V PSRAM)	VCC	2.7	3.3	3.6	V	Power supply voltage (3.3 V)	31
Maximum clock frequency (PSRAM)	FC	80			MHz		31
Center frequency range of operating channel (Wi-Fi)		2412		2484	MHz		32
RF transmit power range (Bluetooth LE)		-24		20	dBm		34
Center frequency range of operating channel (Bluetooth LE)		2402		2480	MHz		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-1U-N4R8
Footprint: PCM_Espressif:ESP32-S3-WROOM-1U
3D model: ESP32-S3-WROOM-1U (KiCad packages3D, STEP)
3D model files: esp32-s3-wroom-1u-n4r8-etched.step / esp32-s3-wroom-1u-n4r8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-s3-wroom-1u-n4r8.step / esp32-s3-wroom-1u-n4r8.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Espressif Systems datasheet (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

# ESP32-S3-WROOM-1U-N4R8

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

ESP32-S3-WROOM-1U-N4R8 from Espressif Systems, in a ESP32-S3-WROOM-1U. 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 pin of the module. |
| 2 | 3V3 | power_in | Power supply input; Table 6-2 gives a module supply (VDD33) range of 3.0 V to 3.6 V with 3.3 V typical and at least 0.5 A from the external supply. |
| 3 | EN | input | Chip enable: high turns the chip on and low powers it off, and the pin must not be left floating. |
| 4 | IO4 | bidirectional | Bidirectional GPIO4 with RTC_GPIO4, TOUCH4 and ADC1_CH3 alternate functions. |
| 5 | IO5 | bidirectional | Bidirectional GPIO5 with RTC_GPIO5, TOUCH5 and ADC1_CH4 alternate functions. |
| 6 | IO6 | bidirectional | Bidirectional GPIO6 with RTC_GPIO6, TOUCH6 and ADC1_CH5 alternate functions. |
| 7 | IO7 | bidirectional | Bidirectional GPIO7 with RTC_GPIO7, TOUCH7 and ADC1_CH6 alternate functions. |
| 8 | IO15 | bidirectional | Bidirectional GPIO15 with RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P alternate functions. |
| 9 | IO16 | bidirectional | Bidirectional GPIO16 with RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N alternate functions. |
| 10 | IO17 | bidirectional | Bidirectional GPIO17 with RTC_GPIO17, U1TXD and ADC2_CH6 alternate functions. |
| 11 | IO18 | bidirectional | Bidirectional GPIO18 with RTC_GPIO18, U1RXD, ADC2_CH7 and CLK_OUT3 alternate functions. |
| 12 | IO8 | bidirectional | Bidirectional GPIO8 with RTC_GPIO8, TOUCH8, ADC1_CH7 and SUBSPICS1 alternate functions. |
| 13 | IO19 | bidirectional | Bidirectional GPIO19 with RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D- alternate functions. |
| 14 | IO20 | bidirectional | Bidirectional GPIO20 with RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+ alternate functions. |
| 15 | IO3 | bidirectional | Bidirectional GPIO3 with RTC_GPIO3, TOUCH3 and ADC1_CH2 alternate functions; it is a strapping pin for JTAG signal source selection. |
| 16 | IO46 | bidirectional | Bidirectional GPIO46, which is also a strapping pin for chip boot mode and ROM message printing control. |
| 17 | IO9 | bidirectional | Bidirectional GPIO9 with RTC_GPIO9, TOUCH9, ADC1_CH8, FSPIHD and SUBSPIHD alternate functions. |
| 18 | IO10 | bidirectional | Bidirectional GPIO10 with RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 and SUBSPICS0 alternate functions. |
| 19 | IO11 | bidirectional | Bidirectional GPIO11 with RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 and SUBSPID alternate functions. |
| 20 | IO12 | bidirectional | Bidirectional GPIO12 with RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 and SUBSPICLK alternate functions. |
| 21 | IO13 | bidirectional | Bidirectional GPIO13 with RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 and SUBSPIQ alternate functions. |
| 22 | IO14 | bidirectional | Bidirectional GPIO14 with RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS and SUBSPIWP alternate functions. |
| 23 | IO21 | bidirectional | Bidirectional GPIO21 with RTC_GPIO21 alternate function. |
| 24 | IO47 | bidirectional | Bidirectional GPIO47 with SPICLK_P_DIFF and SUBSPICLK_P_DIFF alternate functions; its I/O works at 1.8 V only on modules with ESP32-S3R16V, not on this variant. |
| 25 | IO48 | bidirectional | Bidirectional GPIO48 with SPICLK_N_DIFF and SUBSPICLK_N_DIFF alternate functions; its I/O works at 1.8 V only on modules with ESP32-S3R16V, not on this variant. |
| 26 | IO45 | bidirectional | Bidirectional GPIO45, which is also a strapping pin setting the VDD_SPI voltage. |
| 27 | IO0 | bidirectional | Bidirectional RTC_GPIO0/GPIO0, which is a strapping pin for chip boot mode with a weak internal pull-up. |
| 28 | IO35 | bidirectional | Bidirectional GPIO35 with SPIIO6, FSPID and SUBSPID alternate functions; on modules with Octal SPI PSRAM (ESP32-S3R8 or ESP32-S3R16V) this pin is connected to the PSRAM and not available for other uses. |
| 29 | IO36 | bidirectional | Bidirectional GPIO36 with SPIIO7, FSPICLK and SUBSPICLK alternate functions; on modules with Octal SPI PSRAM (ESP32-S3R8 or ESP32-S3R16V) this pin is connected to the PSRAM and not available for other uses. |
| 30 | IO37 | bidirectional | Bidirectional GPIO37 with SPIDQS, FSPIQ and SUBSPIQ alternate functions; on modules with Octal SPI PSRAM (ESP32-S3R8 or ESP32-S3R16V) this pin is connected to the PSRAM and not available for other uses. |
| 31 | IO38 | bidirectional | Bidirectional GPIO38 with FSPIWP and SUBSPIWP alternate functions. |
| 32 | IO39 | bidirectional | Bidirectional GPIO39 with MTCK, CLK_OUT3 and SUBSPICS1 alternate functions (JTAG clock by default). |
| 33 | IO40 | bidirectional | Bidirectional GPIO40 with MTDO and CLK_OUT2 alternate functions (JTAG data out by default). |
| 34 | IO41 | bidirectional | Bidirectional GPIO41 with MTDI and CLK_OUT1 alternate functions (JTAG data in by default). |
| 35 | IO42 | bidirectional | Bidirectional GPIO42 with MTMS alternate function (JTAG mode select by default). |
| 36 | RXD0 | bidirectional | Bidirectional UART0 receive pin U0RXD (GPIO44, CLK_OUT2 alternate functions). |
| 37 | TXD0 | bidirectional | Bidirectional UART0 transmit pin U0TXD (GPIO43, CLK_OUT1 alternate functions). |
| 38 | IO2 | bidirectional | Bidirectional RTC_GPIO2/GPIO2 with TOUCH2 and ADC1_CH1 alternate functions. |
| 39 | IO1 | bidirectional | Bidirectional RTC_GPIO1/GPIO1 with TOUCH1 and ADC1_CH0 alternate functions. |
| 40 | GND | power_in | Ground pin of the module. |
| 41 | EPAD | power_in | Exposed ground pad; soldering it to the base-board ground is optional but improves thermal performance, and excess solder paste can lift the module. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | ESP32-S3-WROOM-1U |
| 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 (absolute maximum) | VDD33 | -0.3 |  | 3.6 | V |  | 27 |
| Storage temperature | TSTORE | -40 |  | 105 | °C |  | 27 |
| Power supply voltage (recommended) | 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 |
| Low-level input voltage | VIL | -0.3 |  |  | V |  | 27 |
| Chip reset voltage (EN voltage is within the specified range) | VIL_nRST | -0.3 |  |  | V | EN voltage is within the specified range | 28 |
| High-level input current | IIH |  |  | 50 | nA |  | 27 |
| Low-level input current | IIL |  |  | 50 | nA |  | 27 |
| Power supply voltage (3.3 V PSRAM) | VCC | 2.7 | 3.3 | 3.6 | V | Power supply voltage (3.3 V) | 31 |
| Maximum clock frequency (PSRAM) | FC | 80 |  |  | MHz |  | 31 |
| Center frequency range of operating channel (Wi-Fi) |  | 2412 |  | 2484 | MHz |  | 32 |
| RF transmit power range (Bluetooth LE) |  | -24 |  | 20 | dBm |  | 34 |
| Center frequency range of operating channel (Bluetooth LE) |  | 2402 |  | 2480 | MHz |  | 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-1U-N4R8`
- Footprint: `PCM_Espressif:ESP32-S3-WROOM-1U`
- 3D model: ESP32-S3-WROOM-1U (KiCad packages3D, STEP)
- 3D model files: `esp32-s3-wroom-1u-n4r8-etched.step` / `esp32-s3-wroom-1u-n4r8-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `esp32-s3-wroom-1u-n4r8.step` / `esp32-s3-wroom-1u-n4r8.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-1u-n4r8-datasheet.pdf)