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ESP32-S3-WROOM-1-N16R2

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

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ESP32-S3-WROOM-1-N16R2

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

ESP32-S3-WROOM-1-N16R2 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 reference pin of the module.
2 3V3 power_in Module power supply pin; the datasheet specifies VDD33 at 3.0 V min, 3.3 V typ and 3.6 V max, with at least 0.5 A delivered by the external supply.
3 EN input Chip enable: High enables the chip, Low powers it off, and 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; it is the JTAG signal-source strapping pin.
16 IO46 bidirectional GPIO46 general-purpose I/O; it is a strapping pin for chip boot mode and ROM message printing, with a weak pull-down at reset.
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 functions RTC_GPIO21 only.
24 IO47 bidirectional GPIO47 with alternate functions SPICLK_P_DIFF and SUBSPICLK_P_DIFF; on ESP32-S3R16V modules this pin operates at 1.8 V instead of 3.3 V.
25 IO48 bidirectional GPIO48 with alternate functions SPICLK_N_DIFF and SUBSPICLK_N_DIFF; on ESP32-S3R16V modules this pin operates at 1.8 V instead of 3.3 V.
26 IO45 bidirectional GPIO45 general-purpose I/O; it is the VDD_SPI voltage strapping pin, with a weak pull-down at reset.
27 IO0 bidirectional GPIO0 with alternate function RTC_GPIO0; it is a chip boot mode strapping pin with a weak pull-up at reset.
28 IO35 bidirectional GPIO35 with alternate functions SPIIO6, FSPID and SUBSPID; its default function is set by eFuse, and it is connected to Octal PSRAM and unavailable on ESP32-S3R8 or ESP32-S3R16V modules.
29 IO36 bidirectional GPIO36 with alternate functions SPIIO7, FSPICLK and SUBSPICLK; its default function is set by eFuse, and it is connected to Octal PSRAM and unavailable on ESP32-S3R8 or ESP32-S3R16V modules.
30 IO37 bidirectional GPIO37 with alternate functions SPIDQS, FSPIQ and SUBSPIQ; its default function is set by eFuse, and it is connected to Octal PSRAM and unavailable on ESP32-S3R8 or ESP32-S3R16V modules.
31 IO38 bidirectional GPIO38 with alternate functions FSPIWP and SUBSPIWP.
32 IO39 bidirectional GPIO39 with alternate functions MTCK, CLK_OUT3 and SUBSPICS1 (JTAG clock).
33 IO40 bidirectional GPIO40 with alternate functions MTDO and CLK_OUT2 (JTAG data out).
34 IO41 bidirectional GPIO41 with alternate functions MTDI and CLK_OUT1 (JTAG data in).
35 IO42 bidirectional GPIO42 with alternate function MTMS (JTAG mode select).
36 RXD0 bidirectional UART0 receive pin U0RXD, also usable as GPIO44 and CLK_OUT2.
37 TXD0 bidirectional UART0 transmit pin U0TXD, also usable as 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 pin of the module.
41 EPAD power_in Exposed ground pad; soldering it to the base-board ground is optional and improves thermal performance, but excess solder paste can lift the module.

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 (65 °C version) TA -40 65 °C 65 °C version 27
Operating ambient temperature (85 °C version) TA -40 85 °C 85 °C version 27
Operating ambient temperature (105 °C version) TA -40 105 °C 105 °C version 27
High-level input current IIH 50 nA 27
Low-level input current IIL 50 nA 27
Power supply voltage (1.8 V) VCC 1.62 1.8 1.98 V 31
Power supply voltage (3.3 V) VCC 2.7 3.3 3.6 V 31
Maximum clock frequency FC 80 MHz 31
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
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-1-N16R2
  • Footprint: PCM_Espressif:ESP32-S3-WROOM-1
  • 3D model: ESP32-S3-WROOM-1 (KiCad packages3D, STEP)
  • 3D model files: esp32-s3-wroom-1-n16r2-etched.step / esp32-s3-wroom-1-n16r2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-s3-wroom-1-n16r2.step / esp32-s3-wroom-1-n16r2.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