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ESP32-S3-WROOM-1U-N16R2

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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-N16R2

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

ESP32-S3-WROOM-1U-N16R2 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 power supply pin; Table 3-1 gives no limit, and Table 6-2 lists the VDD33 recommended supply at 3.0 V min, 3.3 V typ, 3.6 V max.
3 EN input Chip enable: High turns the chip on, Low turns it off; do not leave this pin floating.
4 IO4 bidirectional General-purpose I/O with RTC_GPIO4, TOUCH4 and ADC1_CH3 functions.
5 IO5 bidirectional General-purpose I/O with RTC_GPIO5, TOUCH5 and ADC1_CH4 functions.
6 IO6 bidirectional General-purpose I/O with RTC_GPIO6, TOUCH6 and ADC1_CH5 functions.
7 IO7 bidirectional General-purpose I/O with RTC_GPIO7, TOUCH7 and ADC1_CH6 functions.
8 IO15 bidirectional General-purpose I/O with RTC_GPIO15, UART0 RTS (U0RTS), ADC2_CH4 and XTAL_32K_P functions.
9 IO16 bidirectional General-purpose I/O with RTC_GPIO16, UART0 CTS (U0CTS), ADC2_CH5 and XTAL_32K_N functions.
10 IO17 bidirectional General-purpose I/O with RTC_GPIO17, U1TXD and ADC2_CH6 functions.
11 IO18 bidirectional General-purpose I/O with RTC_GPIO18, U1RXD, ADC2_CH7 and CLK_OUT3 functions.
12 IO8 bidirectional General-purpose I/O with RTC_GPIO8, TOUCH8, ADC1_CH7 and SUBSPICS1 functions.
13 IO19 bidirectional General-purpose I/O with RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB D- functions.
14 IO20 bidirectional General-purpose I/O with RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB D+ functions.
15 IO3 bidirectional General-purpose I/O with RTC_GPIO3, TOUCH3 and ADC1_CH2 functions; GPIO3 is a JTAG signal-source strapping pin (Section 4).
16 IO46 bidirectional General-purpose I/O (GPIO46); also a boot strapping pin for chip boot mode and ROM message printing (Section 4).
17 IO9 bidirectional General-purpose I/O with RTC_GPIO9, TOUCH9, ADC1_CH8, FSPIHD and SUBSPIHD functions.
18 IO10 bidirectional General-purpose I/O with RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 and SUBSPICS0 functions.
19 IO11 bidirectional General-purpose I/O with RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 and SUBSPID functions.
20 IO12 bidirectional General-purpose I/O with RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 and SUBSPICLK functions.
21 IO13 bidirectional General-purpose I/O with RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 and SUBSPIQ functions.
22 IO14 bidirectional General-purpose I/O with RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS and SUBSPIWP functions.
23 IO21 bidirectional General-purpose I/O with RTC_GPIO21 function.
24 IO47 bidirectional General-purpose I/O (GPIO47) also carrying SPICLK_P_DIFF and SUBSPICLK_P_DIFF; on modules with ESP32-S3R16V its working voltage is 1.8 V (Table 3-1 note c).
25 IO48 bidirectional General-purpose I/O (GPIO48) also carrying SPICLK_N_DIFF and SUBSPICLK_N_DIFF; on modules with ESP32-S3R16V its working voltage is 1.8 V (Table 3-1 note c).
26 IO45 bidirectional General-purpose I/O (GPIO45); also a VDD_SPI voltage strapping pin (Section 4).
27 IO0 bidirectional General-purpose I/O with RTC_GPIO0 function; also a boot-mode strapping pin with a weak pull-up at reset (Section 4).
28 IO35 bidirectional General-purpose I/O with SPIIO6, FSPID and SUBSPID functions; default function is set by eFuse bit.
29 IO36 bidirectional General-purpose I/O with SPIIO7, FSPICLK and SUBSPICLK functions; default function is set by eFuse bit.
30 IO37 bidirectional General-purpose I/O with SPIDQS, FSPIQ and SUBSPIQ functions; default function is set by eFuse bit.
31 IO38 bidirectional General-purpose I/O with FSPIWP and SUBSPIWP functions.
32 IO39 bidirectional General-purpose I/O with MTCK (JTAG clock), CLK_OUT3 and SUBSPICS1 functions.
33 IO40 bidirectional General-purpose I/O with MTDO (JTAG data out) and CLK_OUT2 functions.
34 IO41 bidirectional General-purpose I/O with MTDI (JTAG data in) and CLK_OUT1 functions.
35 IO42 bidirectional General-purpose I/O with MTMS (JTAG mode select) function.
36 RXD0 bidirectional UART0 receive (U0RXD) pin, also usable as GPIO44 and CLK_OUT2.
37 TXD0 bidirectional UART0 transmit (U0TXD) pin, also usable as GPIO43 and CLK_OUT1.
38 IO2 bidirectional General-purpose I/O with RTC_GPIO2, TOUCH2 and ADC1_CH1 functions.
39 IO1 bidirectional General-purpose I/O with RTC_GPIO1, TOUCH1 and ADC1_CH0 functions.
40 GND power_in Ground connection for the module.
41 EPAD power_in Exposed ground pad; soldering it to the base-board ground is not mandatory but improves thermal performance, and too much solder paste can degrade adhesion of the other pins.

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 TA -40 85 °C 85 °C version 27
Low-level input voltage VIL -0.3 V 27
High-level input current IIH 50 nA 27
Low-level input current IIL 50 nA 27
Chip reset voltage VIL_nRST -0.3 V EN voltage is within the specified range 28
PSRAM power supply voltage (3.3 V) VCC 2.7 3.3 3.6 V Power supply voltage (3.3 V) 31
PSRAM maximum clock frequency FC 80 MHz 31
TX EVM limit, 802.11b 1 Mbps -10 dB 802.11b, 1 Mbps, @20.5 dBm 32
TX EVM limit, 802.11b 11 Mbps -10 dB 802.11b, 11 Mbps, @20.5 dBm 32
TX EVM limit, 802.11g 6 Mbps -5 dB 802.11g, 6 Mbps, @20 dBm 32
TX EVM limit, 802.11g 54 Mbps -25 dB 802.11g, 54 Mbps, @18 dBm 32
TX EVM limit, 802.11n HT20 MCS 0 -5 dB 802.11n, HT20, MCS 0, @19 dBm 33
TX EVM limit, 802.11n HT20 MCS 7 -27 dB 802.11n, HT20, MCS 7, @17.5 dBm 33
TX EVM limit, 802.11n HT40 MCS 0 -5 dB 802.11n, HT40, MCS 0, @18.5 dBm 33
TX EVM limit, 802.11n HT40 MCS 7 -27 dB 802.11n, HT40, MCS 7, @17 dBm 33
Wi-Fi center frequency range of operating channel 2412 2484 MHz 32
Bluetooth LE center frequency range of operating channel 2402 2480 MHz 34
Bluetooth LE RF transmit power range -24 20 dBm 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-N16R2
  • Footprint: PCM_Espressif:ESP32-S3-WROOM-1U
  • 3D model: ESP32-S3-WROOM-1U (KiCad packages3D, STEP)
  • 3D model files: esp32-s3-wroom-1u-n16r2-etched.step / esp32-s3-wroom-1u-n16r2-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-s3-wroom-1u-n16r2.step / esp32-s3-wroom-1u-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