component
ESP32-WROOM-32E-N8R2
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Espressif Systems WiFi Modules, LCC-38(18x25.5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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Contents
README
markdownESP32-WROOM-32E-N8R2
Espressif Systems · WiFi Modules · LCC-38(18x25.5)
ESP32-WROOM-32E-N8R2 from Espressif Systems, in a LCC-38(18x25.5). 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 | Power supply input; VDD33 is recommended at 3.0 V to 3.6 V (3.3 V typ.) with an external supply capable of at least 0.5 A. |
| 3 | EN | input | Chip enable: high enables the chip and low shuts it down, and the pin must not be left floating. |
| 4 | SENSOR_VP | input | Input-only pin for GPIO36, also usable as ADC1_CH0 and RTC_GPIO0. |
| 5 | SENSOR_VN | input | Input-only pin for GPIO39, also usable as ADC1_CH3 and RTC_GPIO3. |
| 6 | IO34 | input | Input-only pin for GPIO34, also usable as ADC1_CH6 and RTC_GPIO4. |
| 7 | IO35 | input | Input-only pin for GPIO35, also usable as ADC1_CH7 and RTC_GPIO5. |
| 8 | IO32 | bidirectional | GPIO32 that can also serve as the 32.768 kHz crystal oscillator input (XTAL_32K_P), ADC1_CH4, TOUCH9 and RTC_GPIO9. |
| 9 | IO33 | bidirectional | GPIO33 that can also serve as the 32.768 kHz crystal oscillator output (XTAL_32K_N), ADC1_CH5, TOUCH8 and RTC_GPIO8. |
| 10 | IO25 | bidirectional | GPIO25 that can also serve as DAC_1, ADC2_CH8, RTC_GPIO6 and EMAC_RXD0. |
| 11 | IO26 | bidirectional | GPIO26 that can also serve as DAC_2, ADC2_CH9, RTC_GPIO7 and EMAC_RXD1. |
| 12 | IO27 | bidirectional | GPIO27 that can also serve as ADC2_CH7, TOUCH7, RTC_GPIO17 and EMAC_RX_DV. |
| 13 | IO14 | bidirectional | GPIO14 that can also serve as ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK and EMAC_TXD2. |
| 14 | IO12 | bidirectional | GPIO12 (MTDI strapping function, also ADC2_CH5, TOUCH5, RTC_GPIO15, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3); the schematic notes it should be kept low at power-on. |
| 15 | GND | power_in | Ground connection for the module. |
| 16 | IO13 | bidirectional | GPIO13 that can also serve as ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3 and EMAC_RX_ER. |
| 17 | NC | unconnected | Not connected; Table 3 gives no function and refers to note 2 (GPIO6 to GPIO11 are tied to the in-package flash and not led out). |
| 18 | NC | unconnected | Not connected; Table 3 gives no function and refers to note 2 (GPIO6 to GPIO11 are tied to the in-package flash and not led out). |
| 19 | NC | unconnected | Not connected; Table 3 gives no function and refers to note 2 (GPIO6 to GPIO11 are tied to the in-package flash and not led out). |
| 20 | NC | unconnected | Not connected; Table 3 gives no function and refers to note 2 (GPIO6 to GPIO11 are tied to the in-package flash and not led out). |
| 21 | NC | unconnected | Not connected; Table 3 gives no function and refers to note 2 (GPIO6 to GPIO11 are tied to the in-package flash and not led out). |
| 22 | NC | unconnected | Not connected; Table 3 gives no function and refers to note 2 (GPIO6 to GPIO11 are tied to the in-package flash and not led out). |
| 23 | IO15 | bidirectional | GPIO15 that can also serve as ADC2_CH3, TOUCH3, MTDO, HSPICS0, RTC_GPIO13, HS2_CMD, SD_CMD and EMAC_RXD3; it is a boot strapping pin (MTDO, U0TXD printing control). |
| 24 | IO2 | bidirectional | GPIO2 that is a boot-mode strapping pin (default pull-down) and can also serve as ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0 and SD_DATA0. |
| 25 | IO0 | bidirectional | GPIO0 that is a boot-mode strapping pin (default pull-up) and can also serve as ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1 and EMAC_TX_CLK. |
| 26 | IO4 | bidirectional | GPIO4 that can also serve as ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1 and EMAC_TX_ER. |
| 27 | IO16 | bidirectional | GPIO16 (HS1_DATA4, U2RXD, EMAC_CLK_OUT); in module variants embedding the ESP32-D0WDR2-V3 it is tied to the embedded PSRAM and cannot be used for other functions. |
| 28 | IO17 | bidirectional | GPIO17 that can also serve as HS1_DATA5, U2TXD and EMAC_CLK_OUT_180. |
| 29 | IO5 | bidirectional | GPIO5 that is a boot strapping pin (SDIO slave timing, default pull-up) and can also serve as VSPICS0, HS1_DATA6 and EMAC_RX_CLK. |
| 30 | IO18 | bidirectional | GPIO18 that can also serve as VSPICLK and HS1_DATA7. |
| 31 | IO19 | bidirectional | GPIO19 that can also serve as VSPIQ, U0CTS and EMAC_TXD0. |
| 32 | NC | unconnected | No function is listed for this pin in Table 3. |
| 33 | IO21 | bidirectional | GPIO21 that can also serve as VSPIHD and EMAC_TX_EN. |
| 34 | RXD0 | bidirectional | GPIO3 used as UART0 receive (U0RXD), which is used for firmware download and log output, and can also serve as CLK_OUT2. |
| 35 | TXD0 | bidirectional | GPIO1 used as UART0 transmit (U0TXD), which is used for firmware download and log output, and can also serve as CLK_OUT3 and EMAC_RXD2. |
| 36 | IO22 | bidirectional | GPIO22 that can also serve as VSPIWP, U0RTS and EMAC_TXD1. |
| 37 | IO23 | bidirectional | GPIO23 that can also serve as VSPID and HS1_STROBE. |
| 38 | GND | power_in | Ground connection for the module. |
| 39 | GND | power_in | Ground thermal pad (labelled P_GND in the schematic); soldering it to the base-board ground is optional but improves thermal performance, and too much solder paste can degrade adhesion of the other pins. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | LCC-38(18x25.5) |
| Category | IoT/Communication Modules |
| Pins | 39 |
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 | 28 | ||
| Storage temperature | TSTORE | -40 | 105 | °C | 28 | ||
| Power supply voltage | VDD33 | 3 | 3.3 | 3.6 | V | 28 | |
| Current delivered by external power supply | IVDD | 0.5 | A | 28 | |||
| Operating ambient temperature | T | -40 | 85 | °C | 85 °C version | 28 | |
| Low-level input voltage | VIL | -0.3 | V | VDD1 = 3.3 V, 25 °C | 28 | ||
| High-level input current | IIH | 50 | nA | 28 | |||
| Low-level input current | IIL | 50 | nA | 28 | |||
| Low-level input voltage of CHIP_PU to shut down the chip | VIL_nRST | 0.6 | V | 29 | |||
| Flash power supply voltage (1.8 V) | VCC | 1.65 | 1.8 | 2 | V | 30 | |
| Flash power supply voltage (3.3 V) | VCC | 2.7 | 3.3 | 3.6 | V | 30 | |
| Flash maximum clock frequency | FC | 80 | MHz | 30 | |||
| Flash program/erase cycles | 100000 | cycles | 30 | ||||
| Flash data retention time | TRET | 20 | years | 30 | |||
| Flash page program time | TPP | 0.8 | 5 | ms | 30 | ||
| Flash sector erase time (4 KB) | TSE | 70 | 500 | ms | 30 | ||
| Flash block erase time (32 KB) | TBE1 | 0.2 | 2 | s | 30 | ||
| Flash block erase time (64 KB) | TBE2 | 0.3 | 3 | s | 30 | ||
| Flash chip erase time (64 Mb) | TCE | 25 | 100 | s | 30 | ||
| PSRAM power supply voltage (1.8 V) | VCC | 1.62 | 1.8 | 1.98 | V | 30 | |
| PSRAM power supply voltage (3.3 V) | VCC | 2.7 | 3.3 | 3.6 | V | 30 | |
| PSRAM maximum clock frequency | FC | 80 | MHz | 30 | |||
| ADC differential nonlinearity | DNL | -7 | 7 | LSB | RTC controller; ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi&Bluetooth off | 25 | |
| ADC integral nonlinearity | INL | -12 | 12 | LSB | RTC controller; ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi&Bluetooth off | 25 | |
| ADC total error | -23 | 23 | mV | Atten = 0, effective measurement range of 100 ∼ 950 mV | 26 | ||
| ADC total error | -30 | 30 | mV | Atten = 1, effective measurement range of 100 ∼ 1250 mV | 26 | ||
| ADC total error | -40 | 40 | mV | Atten = 2, effective measurement range of 150 ∼ 1750 mV | 26 | ||
| ADC total error | -60 | 60 | mV | Atten = 3, effective measurement range of 150 ∼ 2450 mV | 26 | ||
| Center frequency range of operating channel (Wi-Fi) | 2412 | 2484 | MHz | 31 | |||
| RF transmit power range (Bluetooth LE) | -12 | 9 | dBm | 33 | |||
| Center frequency range of operating channel (Bluetooth LE) | 2402 | 2480 | MHz | 33 | |||
| Receiver sensitivity, basic data rate | -90 | -89 | -88 | dBm | @0.1% BER | 33 | |
| Maximum received signal, basic data rate | 0 | dBm | @0.1% BER | 33 | |||
| Receiver sensitivity, π/4 DQPSK (EDR) | -90 | -89 | -88 | dBm | π/4 DQPSK @0.01% BER | 34 | |
| Receiver sensitivity, 8DPSK (EDR) | -84 | -83 | -82 | dBm | 8DPSK @0.01% BER | 34 | |
| Maximum received signal, 8DPSK (EDR) | -5 | dBm | 8DPSK @0.01% BER | 34 | |||
| Δf2max, basic data rate | Δf2max | 127 | kHz | 34 | |||
| Δf1avg, basic data rate | Δf1avg | 155 | kHz | 34 | |||
| Receiver sensitivity, Bluetooth LE | -94 | -93 | -92 | dBm | @30.8% PER | 35 | |
| Maximum received signal, Bluetooth LE | 0 | dBm | @30.8% PER | 35 | |||
| Δf1avg, Bluetooth LE | Δf1avg | 265 | kHz | 36 | |||
| Δf2max, Bluetooth LE | Δf2max | 210 | kHz | 36 |
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 alloy Figure 15: Reflow Profile | 46 |
CAD (KiCad official)
- Symbol:
ESP32-WROOM-32E-N8R2 - Footprint:
PCM_Espressif:ESP32-WROOM-32E - 3D model: LCC-38(18x25.5) (KiCad packages3D, STEP)
- 3D model files:
esp32-wroom-32e-n8r2-etched.step/esp32-wroom-32e-n8r2-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esp32-wroom-32e-n8r2.step/esp32-wroom-32e-n8r2.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Espressif Systems datasheet (52 pp, sha256
4c7a345d1c1bfec3, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).