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ESP32-S3-WROOM-1U-N16R8

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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-N16R8

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

ESP32-S3-WROOM-1U-N16R8 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 input; Table 6-2 gives VDD33 as 3.0 V min, 3.3 V typ, 3.6 V max.
3 EN input High enables the chip and low powers it off; do not leave this pin floating.
4 IO4 bidirectional GPIO4, also RTC_GPIO4, TOUCH4 and ADC1_CH3; DC limits are in Section 6.3.
5 IO5 bidirectional GPIO5, also RTC_GPIO5, TOUCH5 and ADC1_CH4; DC limits are in Section 6.3.
6 IO6 bidirectional GPIO6, also RTC_GPIO6, TOUCH6 and ADC1_CH5; DC limits are in Section 6.3.
7 IO7 bidirectional GPIO7, also RTC_GPIO7, TOUCH7 and ADC1_CH6; DC limits are in Section 6.3.
8 IO15 bidirectional GPIO15, also RTC_GPIO15, U0RTS, ADC2_CH4 and XTAL_32K_P; DC limits are in Section 6.3.
9 IO16 bidirectional GPIO16, also RTC_GPIO16, U0CTS, ADC2_CH5 and XTAL_32K_N; DC limits are in Section 6.3.
10 IO17 bidirectional GPIO17, also RTC_GPIO17, U1TXD and ADC2_CH6; DC limits are in Section 6.3.
11 IO18 bidirectional GPIO18, also RTC_GPIO18, U1RXD, ADC2_CH7 and CLK_OUT3; DC limits are in Section 6.3.
12 IO8 bidirectional GPIO8, also RTC_GPIO8, TOUCH8, ADC1_CH7 and SUBSPICS1; DC limits are in Section 6.3.
13 IO19 bidirectional GPIO19, also RTC_GPIO19, U1RTS, ADC2_CH8, CLK_OUT2 and USB_D-; DC limits are in Section 6.3.
14 IO20 bidirectional GPIO20, also RTC_GPIO20, U1CTS, ADC2_CH9, CLK_OUT1 and USB_D+; DC limits are in Section 6.3.
15 IO3 bidirectional GPIO3, also RTC_GPIO3, TOUCH3 and ADC1_CH2; strapping pin for JTAG signal source (Section 4).
16 IO46 bidirectional GPIO46; strapping pin for chip boot mode and ROM message printing, default weak pull-down (Section 4).
17 IO9 bidirectional GPIO9, also RTC_GPIO9, TOUCH9, ADC1_CH8, FSPIHD and SUBSPIHD; DC limits are in Section 6.3.
18 IO10 bidirectional GPIO10, also RTC_GPIO10, TOUCH10, ADC1_CH9, FSPICS0, FSPIIO4 and SUBSPICS0; DC limits are in Section 6.3.
19 IO11 bidirectional GPIO11, also RTC_GPIO11, TOUCH11, ADC2_CH0, FSPID, FSPIIO5 and SUBSPID; DC limits are in Section 6.3.
20 IO12 bidirectional GPIO12, also RTC_GPIO12, TOUCH12, ADC2_CH1, FSPICLK, FSPIIO6 and SUBSPICLK; DC limits are in Section 6.3.
21 IO13 bidirectional GPIO13, also RTC_GPIO13, TOUCH13, ADC2_CH2, FSPIQ, FSPIIO7 and SUBSPIQ; DC limits are in Section 6.3.
22 IO14 bidirectional GPIO14, also RTC_GPIO14, TOUCH14, ADC2_CH3, FSPIWP, FSPIDQS and SUBSPIWP; DC limits are in Section 6.3.
23 IO21 bidirectional GPIO21, also RTC_GPIO21; DC limits are in Section 6.3.
24 IO47 bidirectional GPIO47, also SPICLK_P_DIFF and SUBSPICLK_P_DIFF; operates at 1.8 V only on R16V modules, not stated for R8 modules.
25 IO48 bidirectional GPIO48, also SPICLK_N_DIFF and SUBSPICLK_N_DIFF; operates at 1.8 V only on R16V modules, not stated for R8 modules.
26 IO45 bidirectional GPIO45; strapping pin for VDD_SPI voltage, default weak pull-down (Section 4).
27 IO0 bidirectional GPIO0, also RTC_GPIO0; strapping pin for chip boot mode, default weak pull-up (Section 4).
28 IO35 bidirectional SPIIO6, GPIO35, FSPID and SUBSPID; default function is set by eFuse bit, and the pin is unavailable for other uses on R8 or R16V modules with Octal SPI PSRAM.
29 IO36 bidirectional SPIIO7, GPIO36, FSPICLK and SUBSPICLK; default function is set by eFuse bit, and the pin is unavailable for other uses on R8 or R16V modules with Octal SPI PSRAM.
30 IO37 bidirectional SPIDQS, GPIO37, FSPIQ and SUBSPIQ; default function is set by eFuse bit, and the pin is unavailable for other uses on R8 or R16V modules with Octal SPI PSRAM.
31 IO38 bidirectional GPIO38, FSPIWP and SUBSPIWP; DC limits are in Section 6.3.
32 IO39 bidirectional MTCK, GPIO39, CLK_OUT3 and SUBSPICS1; DC limits are in Section 6.3.
33 IO40 bidirectional MTDO, GPIO40 and CLK_OUT2; DC limits are in Section 6.3.
34 IO41 bidirectional MTDI, GPIO41 and CLK_OUT1; DC limits are in Section 6.3.
35 IO42 bidirectional MTMS and GPIO42; DC limits are in Section 6.3.
36 RXD0 bidirectional U0RXD, GPIO44 and CLK_OUT2; DC limits are in Section 6.3.
37 TXD0 bidirectional U0TXD, GPIO43 and CLK_OUT1; DC limits are in Section 6.3.
38 IO2 bidirectional GPIO2, also RTC_GPIO2, TOUCH2 and ADC1_CH1; DC limits are in Section 6.3.
39 IO1 bidirectional GPIO1, also RTC_GPIO1, TOUCH1 and ADC1_CH0; DC limits are in Section 6.3.
40 GND power_in Ground connection for the module.
41 EPAD power_in Ground exposed pad; soldering it to the base board ground is optional and improves thermal performance, applying the correct amount of paste.

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 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
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
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
TX EVM limit, 802.11b 1 Mbps -10 dB @20.5 dBm 32
TX EVM limit, 802.11b 11 Mbps -10 dB @20.5 dBm 32
TX EVM limit, 802.11g 6 Mbps -5 dB @20 dBm 32
TX EVM limit, 802.11g 54 Mbps -25 dB @18 dBm 32
TX EVM limit, 802.11n HT20 MCS 0 -5 dB @19 dBm 33
TX EVM limit, 802.11n HT20 MCS 7 -27 dB @17.5 dBm 33
TX EVM limit, 802.11n HT40 MCS 0 -5 dB @18.5 dBm 33
TX EVM limit, 802.11n HT40 MCS 7 -27 dB @17 dBm 33

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