component
ESP32-S2FN4R2
Public Made by Adomby adom
Espressif Systems WiFi Modules, QFN-56-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
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{
"schema_version": 1,
"type": "component",
"slug": "esp32-s2fn4r2",
"title": "ESP32-S2FN4R2",
"brief": "Espressif Systems WiFi Modules, QFN-56-EP(7x7). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.",
"version": "0.1.0",
"license": "CC-BY-SA-4.0",
"tags": [
"component",
"iot-communication modules",
"esp32-s2fn4r2",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ESP32-S2FN4R2",
"manufacturer": "Espressif Systems",
"package": "QFN-56-EP(7x7)",
"pin_count": 57,
"category": "IoT/Communication Modules",
"subcategory": "WiFi Modules",
"datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf",
"parts": {
"symbol": "esp32-s2fn4r2.kicad_sym",
"footprint": "esp32-s2fn4r2.kicad_mod",
"model_3d": "esp32-s2fn4r2-hero.glb",
"model_3d_plain": "esp32-s2fn4r2-etched.glb",
"model_3d_step": "esp32-s2fn4r2-etched.step",
"model_3d_step_plain": "esp32-s2fn4r2.step",
"lbr": "esp32-s2fn4r2.lbr"
},
"distributor_links": {
"lcsc": "C2844252",
"mouser": "356-ESP32-S2FN4R2"
},
"distributor_check": {
"checked_at": "2026-10-27T22:57:57Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "deferred",
"error": "shared DigiKey quota guard: 977 calls left today"
},
"mouser": {
"pn": "356-ESP32-S2FN4R2",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "VDDA",
"type": "power_in",
"description": "Analog power domain supply pin for the RF and analog circuitry."
},
{
"number": "2",
"name": "LNA_IN",
"type": "bidirectional",
"description": "Low Noise Amplifier (RF LNA) input/output signal pin for the 2.4 GHz receive path."
},
{
"number": "3",
"name": "VDD3P3",
"type": "power_in",
"description": "Analog power domain supply pin."
},
{
"number": "4",
"name": "VDD3P3",
"type": "power_in",
"description": "Analog power domain supply pin."
},
{
"number": "5",
"name": "GPIO0",
"type": "bidirectional",
"description": "Strapping pin for chip boot mode with a weak pull-up at reset, configurable via software IO MUX and GPIO matrix functions."
},
{
"number": "6",
"name": "GPIO1",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO1, TOUCH1 and ADC1_CH0 analog functions, default drive strength 20 mA."
},
{
"number": "7",
"name": "GPIO2",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO2, TOUCH2 and ADC1_CH1 analog functions, default drive strength 20 mA."
},
{
"number": "8",
"name": "GPIO3",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO3, TOUCH3 and ADC1_CH2 analog functions, default drive strength 20 mA."
},
{
"number": "9",
"name": "GPIO4",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO4, TOUCH4 and ADC1_CH3 analog functions, default drive strength 20 mA."
},
{
"number": "10",
"name": "GPIO5",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO5, TOUCH5 and ADC1_CH4 analog functions, default drive strength 20 mA."
},
{
"number": "11",
"name": "GPIO6",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO6, TOUCH6 and ADC1_CH5 analog functions, default drive strength 20 mA."
},
{
"number": "12",
"name": "GPIO7",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO7, TOUCH7 and ADC1_CH6 analog functions, default drive strength 20 mA."
},
{
"number": "13",
"name": "GPIO8",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO8, TOUCH8 and ADC1_CH7 analog functions, default drive strength 20 mA."
},
{
"number": "14",
"name": "GPIO9",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO9, TOUCH9 and ADC1_CH8 analog functions, default drive strength 20 mA."
},
{
"number": "15",
"name": "GPIO10",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO10, TOUCH10 and ADC1_CH9 analog functions, default drive strength 20 mA."
},
{
"number": "16",
"name": "GPIO11",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO11, TOUCH11 and ADC2_CH0 analog functions, default drive strength 20 mA."
},
{
"number": "17",
"name": "GPIO12",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO12, TOUCH12 and ADC2_CH1 analog functions, default drive strength 20 mA."
},
{
"number": "18",
"name": "GPIO13",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO13, TOUCH13 and ADC2_CH2 analog functions, default drive strength 20 mA."
},
{
"number": "19",
"name": "GPIO14",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO14, TOUCH14 and ADC2_CH3 analog functions, default drive strength 20 mA."
},
{
"number": "20",
"name": "VDD3P3_RTC",
"type": "power_in",
"description": "RTC domain supply pin."
},
{
"number": "21",
"name": "XTAL_32K_P",
"type": "bidirectional",
"description": "Positive clock signal connected to the crystal or oscillator for the 32 kHz external clock, also usable as RTC_GPIO15 and ADC2_CH4."
},
{
"number": "22",
"name": "XTAL_32K_N",
"type": "bidirectional",
"description": "Negative clock signal for the 32 kHz external clock input/output, also usable as RTC_GPIO16 and ADC2_CH5."
},
{
"number": "23",
"name": "DAC_1",
"type": "bidirectional",
"description": "Analog output of 8-bit DAC channel 1, also usable as RTC_GPIO17 and ADC2_CH6; the DAC uses VDD3P3_RTC_IO as voltage reference."
},
{
"number": "24",
"name": "DAC_2",
"type": "bidirectional",
"description": "Analog output of 8-bit DAC channel 2, also usable as RTC_GPIO18 and ADC2_CH7; the DAC uses VDD3P3_RTC_IO as voltage reference."
},
{
"number": "25",
"name": "GPIO19",
"type": "bidirectional",
"description": "General-purpose I/O that is also USB_D- for the USB OTG interface, with ADC2_CH8 and RTC_GPIO19 functions."
},
{
"number": "26",
"name": "GPIO20",
"type": "bidirectional",
"description": "General-purpose I/O that is also USB_D+ for the USB OTG interface, with ADC2_CH9 and RTC_GPIO20 functions."
},
{
"number": "27",
"name": "VDD3P3_RTC_IO",
"type": "power_in",
"description": "RTC and part of digital power domain supply for RTC IO pins."
},
{
"number": "28",
"name": "GPIO21",
"type": "bidirectional",
"description": "General-purpose I/O with RTC_GPIO21 function."
},
{
"number": "29",
"name": "SPICS1",
"type": "bidirectional",
"description": "SPI chip select 1 for in-package PSRAM; pin allocated to in-package flash/PSRAM and not recommended for other uses."
},
{
"number": "30",
"name": "VDD_SPI",
"type": "power_in",
"description": "In-package memory backup power line, which can also be configured as an output supplying in-package and off-package flash/PSRAM SPI IO."
},
{
"number": "31",
"name": "SPIHD",
"type": "bidirectional",
"description": "SPI hold signal for in-package flash/PSRAM; pin allocated to in-package memory and not to be used for other purposes."
},
{
"number": "32",
"name": "SPIWP",
"type": "bidirectional",
"description": "SPI write protect signal for in-package flash/PSRAM; pin allocated to in-package memory and not to be used for other purposes."
},
{
"number": "33",
"name": "SPICS0",
"type": "bidirectional",
"description": "SPI chip select 0 for in-package flash; pin allocated to in-package memory and not to be used for other purposes."
},
{
"number": "34",
"name": "SPICLK",
"type": "bidirectional",
"description": "SPI clock for in-package flash/PSRAM; pin allocated to in-package memory and not to be used for other purposes."
},
{
"number": "35",
"name": "SPIQ",
"type": "bidirectional",
"description": "SPI data line (MISO/SIO1) for in-package flash/PSRAM; pin allocated to in-package memory and not to be used for other purposes."
},
{
"number": "36",
"name": "SPID",
"type": "bidirectional",
"description": "SPI data line (MOSI/SIO0) for in-package flash/PSRAM; pin allocated to in-package memory and not to be used for other purposes."
},
{
"number": "37",
"name": "GPIO33",
"type": "bidirectional",
"description": "Higher data line IO4 for 8-line SPI, usable as GPIO only if the chip is not connected to flash or PSRAM in 8-line SPI mode; powered by VDD_SPI or VDD3P3_CPU."
},
{
"number": "38",
"name": "GPIO34",
"type": "bidirectional",
"description": "Higher data line IO5 for 8-line SPI, usable as GPIO only if the chip is not connected to flash or PSRAM in 8-line SPI mode; powered by VDD_SPI or VDD3P3_CPU."
},
{
"number": "39",
"name": "GPIO35",
"type": "bidirectional",
"description": "Higher data line IO6 for 8-line SPI, usable as GPIO only if the chip is not connected to flash or PSRAM in 8-line SPI mode; powered by VDD_SPI or VDD3P3_CPU."
},
{
"number": "40",
"name": "GPIO36",
"type": "bidirectional",
"description": "Higher data line IO7 for 8-line SPI, usable as GPIO only if the chip is not connected to flash or PSRAM in 8-line SPI mode; powered by VDD_SPI or VDD3P3_CPU."
},
{
"number": "41",
"name": "GPIO37",
"type": "bidirectional",
"description": "DQS/DM data strobe for 8-line SPI, usable as GPIO only if the chip is not connected to flash or PSRAM in 8-line SPI mode; powered by VDD_SPI or VDD3P3_CPU."
},
{
"number": "42",
"name": "GPIO38",
"type": "bidirectional",
"description": "General-purpose I/O with IO MUX functions F0-F4, powered by VDD3P3_CPU."
},
{
"number": "43",
"name": "MTCK",
"type": "bidirectional",
"description": "JTAG test clock input (default function) that can also be used as GPIO39, powered by VDD3P3_CPU."
},
{
"number": "44",
"name": "MTDO",
"type": "bidirectional",
"description": "JTAG test data output (default function) that can also be used as GPIO40, powered by VDD3P3_CPU."
},
{
"number": "45",
"name": "VDD3P3_CPU",
"type": "power_in",
"description": "Digital power domain supply pin for digital IO."
},
{
"number": "46",
"name": "MTDI",
"type": "bidirectional",
"description": "JTAG test data input (default function) that can also be used as GPIO41, powered by VDD3P3_CPU."
},
{
"number": "47",
"name": "MTMS",
"type": "bidirectional",
"description": "JTAG test mode select (default function) that can also be used as GPIO42, powered by VDD3P3_CPU."
},
{
"number": "48",
"name": "U0TXD",
"type": "bidirectional",
"description": "UART0 transmit data (default function) that can also be used as GPIO43; has weak pull-up enabled at reset, powered by VDD3P3_CPU."
},
{
"number": "49",
"name": "U0RXD",
"type": "bidirectional",
"description": "UART0 receive data (default function) that can also be used as GPIO44; has weak pull-up enabled at reset, powered by VDD3P3_CPU."
},
{
"number": "50",
"name": "GPIO45",
"type": "bidirectional",
"description": "Strapping pin for VDD_SPI voltage, with a weak pull-down enabled at reset, powered by VDD3P3_CPU."
},
{
"number": "51",
"name": "VDDA",
"type": "power_in",
"description": "Analog power domain supply pin."
},
{
"number": "52",
"name": "XTAL_N",
"type": "passive",
"description": "External clock input/output connected to the chip oscillator (negative side of the differential clock)."
},
{
"number": "53",
"name": "XTAL_P",
"type": "passive",
"description": "External clock input/output connected to the chip oscillator (positive side of the differential clock)."
},
{
"number": "54",
"name": "VDDA",
"type": "power_in",
"description": "Analog power domain supply pin."
},
{
"number": "55",
"name": "GPIO46",
"type": "input",
"description": "Input-only GPIO and strapping pin with a fixed pull-down, used for chip boot mode and ROM message printing control."
},
{
"number": "56",
"name": "CHIP_PU",
"type": "input",
"description": "Power-up and reset pin: High turns the chip on, Low shuts it down; it must not be left floating."
},
{
"number": "57",
"name": "GND",
"type": "power_in",
"description": "External ground connection (exposed pad) for the chip."
}
],
"provenance": {
"extractor": "extract_pins 0.3",
"factory_chain": {
"factory": "2.0.0",
"extractor": "extract_pins 0.3",
"primary_model": "claude-haiku-5-5",
"primary_mode": "text",
"consensus_model": "claude-sonnet-5-5",
"consensus": "agreed",
"guards": "pin_guards 0.1: passed",
"guard_notes": [
"extractor flagged: The datasheet states the two QFN56 (7x7 mm) packages differ only in exposed pad (EPAD) size. The FN4",
"3/57 pins cited to the wrong page (name found elsewhere): ['23:DAC_1@p45', '24:DAC_2@p45', '34:SPICLK@p28']"
],
"pages_sent": 39,
"cost_usd": 0.1572,
"at": "2026-10-27T22:57:39"
},
"datasheet": {
"url": "https://www.espressif.com/sites/default/files/documentation/esp32-s2_datasheet_en.pdf",
"pages": 65,
"sha256": "7c0c54f11e79cc77",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 57,
"described": 57,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "esp32-s2fn4r2.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7,
7,
0.92
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "a7e1b68d7c240016a0c468e633f7967f445758a90dea110c3eff24882158aaa8",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "esp32-s2fn4r2-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
7,
7,
0.92
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "d46de309726d81a63a825dc724f335fd99ddf338b58dc4ad8ea324e571cecdf9",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Espressif Systems",
"Package": "QFN-56-EP(7x7)",
"Category": "IoT/Communication Modules",
"Pins": "57"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "7c0c54f11e79cc77b09ae070221f056e2c21a3746a8f3a23a0371c4efcf8e02d",
"rows": [
{
"name": "Input voltage on power pins",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 3.6,
"conditions": "Allowed input voltage",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Cumulative IO output current",
"symbol": "Ioutput",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 1800,
"conditions": "",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "TSTORE",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Recommended input voltage VDDA, VDD3P3, VDD3P3_RTC",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 2.8,
"typ": 3.3,
"max": 3.6,
"conditions": "Recommended input voltage",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Recommended input voltage VDD3P3_RTC_IO",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 3,
"typ": 3.3,
"max": 3.6,
"conditions": "Recommended input voltage",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Recommended input voltage VDD_SPI (as input)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 1.8,
"typ": 3.3,
"max": 3.6,
"conditions": "as input",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Recommended input voltage VDD3P3_CPU",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 2.8,
"typ": 3.3,
"max": 3.6,
"conditions": "Recommended input voltage",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Cumulative input current",
"symbol": "IVDD",
"kind": "recommended_operating",
"unit": "A",
"min": 0.5,
"typ": null,
"max": null,
"conditions": "",
"source_page": 48,
"source": "datasheet"
},
{
"name": "Junction temperature",
"symbol": "TJ",
"kind": "recommended_operating",
"unit": "°C",
"min": -40,
"typ": null,
"max": 125,
"conditions": "",
"source_page": 48,
"source": "datasheet"
},
{
"name": "High-level input current",
"symbol": "IIH",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 49,
"source": "datasheet"
},
{
"name": "Low-level input current",
"symbol": "IIL",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 49,
"source": "datasheet"
},
{
"name": "Differential nonlinearity",
"symbol": "DNL",
"kind": "electrical",
"unit": "LSB",
"min": -7,
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