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ESP32-S3-WROOM-1U-N4

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Espressif Systems WiFi Modules, ESP32-S3-WROOM-1U. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ESP32-S3-WROOM-1U-N4

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

ESP32-S3-WROOM-1U-N4 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 connection for the module.
2 3V3 power_in Module supply input; the datasheet specifies VDD33 of 3.0 V to 3.6 V (3.3 V typical) with at least 0.5 A from the external supply.
3 EN input High enables the chip and low powers it off; the pin must not be left floating.
4 IO4 bidirectional GPIO4 with alternate functions RTC_GPIO4, TOUCH4 and ADC1_CH3.
5 IO5 bidirectional GPIO5 with alternate functions RTC_GPIO5, TOUCH5 and ADC1_CH4.
6 IO6 bidirectional GPIO6 with alternate functions RTC_GPIO6, TOUCH6 and ADC1_CH5.
7 IO7 bidirectional GPIO7 with alternate functions RTC_GPIO7, TOUCH7 and ADC1_CH6.
8 IO15 bidirectional GPIO15 with alternate functions RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P.
9 IO16 bidirectional GPIO16 with alternate functions RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N.
10 IO17 bidirectional GPIO17 with alternate functions RTC_GPIO17, U1TXD and ADC2_CH6.
11 IO18 bidirectional GPIO18 with alternate functions RTC_GPIO18, U1RXD, ADC2_CH7 and CLK_OUT3.
12 IO8 bidirectional GPIO8 with alternate functions RTC_GPIO8, TOUCH8, ADC1_CH7 and SUBSPICS1.
13 IO19 bidirectional GPIO19 with alternate functions RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D-.
14 IO20 bidirectional GPIO20 with alternate functions RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+.
15 IO3 bidirectional GPIO3 with alternate functions RTC_GPIO3, TOUCH3 and ADC1_CH2; its strapping default is floating.
16 IO46 bidirectional GPIO46 (strapping pin for chip boot mode and ROM message printing, weak pull-down by default).
17 IO9 bidirectional GPIO9 with alternate functions RTC_GPIO9, TOUCH9, ADC1_CH8, FSPIHD and SUBSPIHD.
18 IO10 bidirectional GPIO10 with alternate functions RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 and SUBSPICS0.
19 IO11 bidirectional GPIO11 with alternate functions RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 and SUBSPID.
20 IO12 bidirectional GPIO12 with alternate functions RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 and SUBSPICLK.
21 IO13 bidirectional GPIO13 with alternate functions RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 and SUBSPIQ.
22 IO14 bidirectional GPIO14 with alternate functions RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS and SUBSPIWP.
23 IO21 bidirectional GPIO21 with alternate function RTC_GPIO21.
24 IO47 bidirectional GPIO47 with alternate functions SPICLK_P_DIFF and SUBSPICLK_P_DIFF; operates at 1.8 V only on R16V modules.
25 IO48 bidirectional GPIO48 with alternate functions SPICLK_N_DIFF and SUBSPICLK_N_DIFF; operates at 1.8 V only on R16V modules.
26 IO45 bidirectional GPIO45 (strapping pin for VDD_SPI voltage, weak pull-down by default).
27 IO0 bidirectional GPIO0 with alternate function RTC_GPIO0; strapping pin for chip boot mode, weak pull-up by default.
28 IO35 bidirectional GPIO35 with alternate functions SPIIO6, FSPID and SUBSPID; default function is set by eFuse bit.
29 IO36 bidirectional GPIO36 with alternate functions SPIIO7, FSPICLK and SUBSPICLK; default function is set by eFuse bit.
30 IO37 bidirectional GPIO37 with alternate functions SPIDQS, FSPIQ and SUBSPIQ; default function is set by eFuse bit.
31 IO38 bidirectional GPIO38 with alternate functions FSPIWP and SUBSPIWP.
32 IO39 bidirectional GPIO39 with JTAG function MTCK and alternate functions CLK_OUT3 and SUBSPICS1.
33 IO40 bidirectional GPIO40 with JTAG function MTDO and alternate function CLK_OUT2.
34 IO41 bidirectional GPIO41 with JTAG function MTDI and alternate function CLK_OUT1.
35 IO42 bidirectional GPIO42 with JTAG function MTMS.
36 RXD0 bidirectional UART0 receive (U0RXD) with alternate functions GPIO44 and CLK_OUT2.
37 TXD0 bidirectional UART0 transmit (U0TXD) with alternate functions GPIO43 and CLK_OUT1.
38 IO2 bidirectional GPIO2 with alternate functions RTC_GPIO2, TOUCH2 and ADC1_CH1.
39 IO1 bidirectional GPIO1 with alternate functions RTC_GPIO1, TOUCH1 and ADC1_CH0.
40 GND power_in Ground connection for the module.
41 EPAD power_in Exposed thermal pad tied to ground; soldering it to the base-board ground is optional and can improve thermal performance.

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 VDD33 3 3.3 3.6 V 27
Current delivered by external power supply IVDD 0.5 A 27
Operating ambient temperature (85 °C version) TA -40 85 °C 85 °C version 27
High-level input current IIH 50 nA 27
Low-level input current IIL 50 nA 27
Center frequency range of operating channel (Wi-Fi) 2412 2484 MHz 32
Center frequency range of operating channel (Bluetooth LE) 2402 2480 MHz 34
RF transmit power range (Bluetooth LE) -24 20 dBm 34
TX EVM limit -10 dB 802.11b, 1 Mbps, @20.5 dBm 32
TX EVM limit -5 dB 802.11g, 6 Mbps, @20 dBm 32
TX EVM limit -25 dB 802.11g, 54 Mbps, @18 dBm 32
TX EVM limit -5 dB 802.11n, HT20, MCS 0, @19 dBm 33
TX EVM limit -27 dB 802.11n, HT20, MCS 7, @17.5 dBm 33
Pin capacitance CIN 2 pF 27
High-level source current IOH 40 mA VDD = 3.3 V, VOH >= 2.64 V, PAD_DRIVER = 3 27
Low-level sink current IOL 28 mA VDD = 3.3 V, VOL = 0.495 V, PAD_DRIVER = 3 27
Internal weak pull-up resistor RPU 45 kΩ 27
Internal weak pull-down resistor RPD 45 kΩ 27

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-N4
  • Footprint: PCM_Espressif:ESP32-S3-WROOM-1U
  • 3D model: ESP32-S3-WROOM-1U (KiCad packages3D, STEP)
  • 3D model files: esp32-s3-wroom-1u-n4-etched.step / esp32-s3-wroom-1u-n4-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-s3-wroom-1u-n4.step / esp32-s3-wroom-1u-n4.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