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Contents

Pinout
Key specifications
Electrical characteristics
Materials and finish
CAD (KiCad official)
Provenance

README

markdown

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 (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