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ESP32-S3-WROOM-1-N16R8

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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-N16R8

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

ESP32-S3-WROOM-1-N16R8 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 Power supply input; Table 6-2 gives VDD33 as 3.0 V min, 3.3 V typ, 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, also usable as RTC_GPIO4, TOUCH4 and ADC1_CH3.
5 IO5 bidirectional GPIO5, also usable as RTC_GPIO5, TOUCH5 and ADC1_CH4.
6 IO6 bidirectional GPIO6, also usable as RTC_GPIO6, TOUCH6 and ADC1_CH5.
7 IO7 bidirectional GPIO7, also usable as RTC_GPIO7, TOUCH7 and ADC1_CH6.
8 IO15 bidirectional GPIO15, also usable as RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P.
9 IO16 bidirectional GPIO16, also usable as RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N.
10 IO17 bidirectional GPIO17, also usable as RTC_GPIO17, U1TXD and ADC2_CH6.
11 IO18 bidirectional GPIO18, also usable as RTC_GPIO18, U1RXD, ADC2_CH7 and CLK_OUT3.
12 IO8 bidirectional GPIO8, also usable as RTC_GPIO8, TOUCH8, ADC1_CH7 and SUBSPICS1.
13 IO19 bidirectional GPIO19, also usable as RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D-.
14 IO20 bidirectional GPIO20, also usable as RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+.
15 IO3 bidirectional GPIO3, also usable as RTC_GPIO3, TOUCH3 and ADC1_CH2; it is the JTAG signal source strapping pin, floating at reset by default.
16 IO46 bidirectional GPIO46; it is a strapping pin for chip boot mode and ROM message printing, with a weak pull-down at reset.
17 IO9 bidirectional GPIO9, also usable as RTC_GPIO9, TOUCH9, ADC1_CH8, FSPIHD and SUBSPIHD.
18 IO10 bidirectional GPIO10, also usable as RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 and SUBSPICS0.
19 IO11 bidirectional GPIO11, also usable as RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 and SUBSPID.
20 IO12 bidirectional GPIO12, also usable as RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 and SUBSPICLK.
21 IO13 bidirectional GPIO13, also usable as RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 and SUBSPIQ.
22 IO14 bidirectional GPIO14, also usable as RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS and SUBSPIWP.
23 IO21 bidirectional GPIO21, also usable as RTC_GPIO21.
24 IO47 bidirectional GPIO47, also usable as SPICLK_P_DIFF and SUBSPICLK_P_DIFF; the datasheet states a 1.8 V working voltage for this pin only on modules with ESP32-S3R16V.
25 IO48 bidirectional GPIO48, also usable as SPICLK_N_DIFF and SUBSPICLK_N_DIFF; the datasheet states a 1.8 V working voltage for this pin only on modules with ESP32-S3R16V.
26 IO45 bidirectional GPIO45; it is a strapping pin that sets the VDD_SPI voltage, with a weak pull-down at reset.
27 IO0 bidirectional GPIO0, also usable as RTC_GPIO0; it is a strapping pin for chip boot mode with a weak pull-up at reset.
28 IO35 bidirectional GPIO35, also usable as SPIIO6, FSPID and SUBSPID; its default function is set by eFuse, and on modules with Octal SPI PSRAM it is connected to the PSRAM and not available for other uses.
29 IO36 bidirectional GPIO36, also usable as SPIIO7, FSPICLK and SUBSPICLK; its default function is set by eFuse, and on modules with Octal SPI PSRAM it is connected to the PSRAM and not available for other uses.
30 IO37 bidirectional GPIO37, also usable as SPIDQS, FSPIQ and SUBSPIQ; its default function is set by eFuse, and on modules with Octal SPI PSRAM it is connected to the PSRAM and not available for other uses.
31 IO38 bidirectional GPIO38, also usable as FSPIWP and SUBSPIWP.
32 IO39 bidirectional GPIO39, also usable as MTCK, CLK_OUT3 and SUBSPICS1.
33 IO40 bidirectional GPIO40, also usable as MTDO and CLK_OUT2.
34 IO41 bidirectional GPIO41, also usable as MTDI and CLK_OUT1.
35 IO42 bidirectional GPIO42, also usable as MTMS.
36 RXD0 bidirectional UART0 receive (U0RXD), also usable as GPIO44 and CLK_OUT2.
37 TXD0 bidirectional UART0 transmit (U0TXD), also usable as GPIO43 and CLK_OUT1.
38 IO2 bidirectional GPIO2, also usable as RTC_GPIO2, TOUCH2 and ADC1_CH1.
39 IO1 bidirectional GPIO1, also usable as RTC_GPIO1, TOUCH1 and ADC1_CH0.
40 GND power_in Ground reference 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 TA -40 65 °C 65 °C version 27
High-level input current IIH 50 nA 27
Low-level input current IIL 50 nA 27
PSRAM power supply voltage (1.8 V) VCC 1.62 1.8 1.98 V 31
PSRAM power supply voltage (3.3 V) VCC 2.7 3.3 3.6 V 31
PSRAM maximum clock frequency 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
Internal weak pull-up resistor RPU 45 kΩ 27
Internal weak pull-down resistor RPD 45 kΩ 27
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

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-N16R8
  • Footprint: PCM_Espressif:ESP32-S3-WROOM-1
  • 3D model: ESP32-S3-WROOM-1 (KiCad packages3D, STEP)
  • 3D model files: esp32-s3-wroom-1-n16r8-etched.step / esp32-s3-wroom-1-n16r8-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-s3-wroom-1-n16r8.step / esp32-s3-wroom-1-n16r8.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