component
ESP32-C3FN4
Public Made by Adomby adom
Espressif Systems RF and Wireless, 32-VFQFN Exposed Pad. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
main
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329330331332333334335336337338339340341342343344345346347348349350351352353354355356357358359360361362363364365366367368369370371372373374375376377378379380381382383384385386387388389390391392393394395396397398399400401402403404405406407408409410411412413414415416417418419420421422423424425426427428429430431432433434435436437438439440441442443444445446447448449450451452453454455456457458459460461462463464465466467468469470471472473474475476477478479480481482483484485486487488489490491492493494495496497498499500501502503504505506507508509510511512513514515516517518519520521522523524525526527528529530531532533534535536537538539540541542543544545546547548549550551552553554555556557558559560561562563564565566567568569570571572573574575576577578579580581582583584585586587588589590591592593594595596597598599600601602603604605606607608609610611612613614615616617618619620621622623624625626627628629630631632633634635636637638639640641642643644645646647648649650651652653654655656657658659660661662663664665666667668669670671672673674675676677678679680681682683684685686687688689690691692693694695696697698699700701702703704705706707708709710711712713714715716717718719720721722723724725726727728729730731732733734735736737738739740741742743744745746747748749750751752753754755756757758759760761762763764765766767768769770771772773774775776777778779780781782783784785786787788789790791792793794795796797798799800801802803804805806807808809810811812813814815816817818819820821822823824825826827828829830831832833834835836837838839840841842843844845846847848849850851852853854855856857858859860861862863864865866867868869870871872873874875876877878879880881882883884
{
"schema_version": 1,
"type": "component",
"slug": "esp32-c3fn4",
"title": "ESP32-C3FN4",
"brief": "Espressif Systems RF and Wireless, 32-VFQFN Exposed Pad. 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",
"rf and wireless",
"esp32-c3fn4",
"factory-2.0.0",
"extractor-text"
],
"component": {
"mpn": "ESP32-C3FN4",
"manufacturer": "Espressif Systems",
"package": "32-VFQFN Exposed Pad",
"pin_count": 33,
"category": "RF and Wireless",
"subcategory": "RF and Wireless",
"datasheet": "https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf",
"parts": {
"symbol": "esp32-c3fn4.kicad_sym",
"footprint": "esp32-c3fn4.kicad_mod",
"model_3d": "esp32-c3fn4-hero.glb",
"model_3d_plain": "esp32-c3fn4-etched.glb",
"model_3d_step": "esp32-c3fn4-etched.step",
"model_3d_step_plain": "esp32-c3fn4.step",
"lbr": "esp32-c3fn4.lbr"
},
"distributor_links": {
"mouser": "356-ESP32-C3FN4"
},
"distributor_check": {
"checked_at": "2026-10-27T23:33:52Z",
"source": "Component Ocean /api/assign-pns",
"digikey": {
"pn": null,
"status": "deferred",
"error": "shared DigiKey quota guard: 953 calls left today"
},
"mouser": {
"pn": "356-ESP32-C3FN4",
"status": "found"
}
},
"pins": [
{
"number": "1",
"name": "LNA_IN",
"type": "bidirectional",
"description": "RF low-noise amplifier (LNA) input/output signal pin."
},
{
"number": "2",
"name": "VDD3P3",
"type": "power_in",
"description": "Input power supply for the analog power domain."
},
{
"number": "3",
"name": "VDD3P3",
"type": "power_in",
"description": "Input power supply for the analog power domain."
},
{
"number": "4",
"name": "XTAL_32K_P",
"type": "bidirectional",
"description": "Positive 32 kHz clock signal connected to the chip's crystal or oscillator; also usable as GPIO0 and ADC1_CH0."
},
{
"number": "5",
"name": "XTAL_32K_N",
"type": "bidirectional",
"description": "Negative 32 kHz clock signal connected to the chip's crystal or oscillator; also usable as GPIO1 and ADC1_CH1."
},
{
"number": "6",
"name": "GPIO2",
"type": "bidirectional",
"description": "GPIO2 is a strapping pin that should be used with caution, with a default drive strength of 10 mA and ADC1_CH2 as an analog function."
},
{
"number": "7",
"name": "CHIP_EN",
"type": "input",
"description": "High enables the chip (powered up) and low disables it (powered down); do not leave this pin floating."
},
{
"number": "8",
"name": "GPIO3",
"type": "bidirectional",
"description": "General-purpose IO with a default drive strength of 10 mA and ADC1_CH3 as an analog function."
},
{
"number": "9",
"name": "MTMS",
"type": "bidirectional",
"description": "JTAG test mode select signal, with a default drive strength of 10 mA and ADC1_CH4 as an analog function."
},
{
"number": "10",
"name": "MTDI",
"type": "bidirectional",
"description": "JTAG test data input, with a default drive strength of 10 mA and ADC2_CH0 as an analog function."
},
{
"number": "11",
"name": "VDD3P3_RTC",
"type": "power_in",
"description": "Input power supply for the RTC and part of the digital power domains, powering the RTC IO pins."
},
{
"number": "12",
"name": "MTCK",
"type": "bidirectional",
"description": "JTAG test clock signal; it has a low-level glitch of about 5 ns during power-up."
},
{
"number": "13",
"name": "MTDO",
"type": "bidirectional",
"description": "JTAG test data output signal; it has a low-level glitch of about 5 ns during power-up."
},
{
"number": "14",
"name": "GPIO8",
"type": "bidirectional",
"description": "Strapping pin that should be used with caution because it is at a defined logic level at startup."
},
{
"number": "15",
"name": "GPIO9",
"type": "bidirectional",
"description": "Strapping pin with the internal weak pull-up enabled, which should be used with caution."
},
{
"number": "16",
"name": "GPIO10",
"type": "bidirectional",
"description": "General-purpose IO that is also usable as FSPICS0; it has a low-level glitch of about 5 ns during power-up."
},
{
"number": "17",
"name": "VDD3P3_CPU",
"type": "power_in",
"description": "Input power supply for the digital power domain, powering the digital IO pins."
},
{
"number": "18",
"name": "VDD_SPI",
"type": "power_in",
"description": "Input from the in-package flash backup power line and output supplying the in-package and off-package flash SPI IO; it can be reconfigured as a GPIO only if the flash has an external power supply."
},
{
"number": "19",
"name": "SPIHD",
"type": "bidirectional",
"description": "SPI0/1 hold signal for the in-package flash, which is not recommended for other uses; the pin has the internal weak pull-up enabled."
},
{
"number": "20",
"name": "SPIWP",
"type": "bidirectional",
"description": "SPI0/1 write-protect signal for the in-package flash, which is not recommended for other uses; the pin has the internal weak pull-up enabled."
},
{
"number": "21",
"name": "SPICS0",
"type": "bidirectional",
"description": "SPI0/1 chip-select signal for the in-package flash, which is not recommended for other uses; the pin has the internal weak pull-up enabled."
},
{
"number": "22",
"name": "SPICLK",
"type": "bidirectional",
"description": "SPI0/1 clock signal for the in-package flash, which is not recommended for other uses; the pin has the internal weak pull-up enabled."
},
{
"number": "23",
"name": "SPID",
"type": "bidirectional",
"description": "SPI0/1 data signal for the in-package flash, which is not recommended for other uses; the pin has the internal weak pull-up enabled."
},
{
"number": "24",
"name": "SPIQ",
"type": "bidirectional",
"description": "SPI0/1 data signal for the in-package flash, which is not recommended for other uses; the pin has the internal weak pull-up enabled."
},
{
"number": "25",
"name": "GPIO18",
"type": "bidirectional",
"description": "General-purpose IO that is also the USB_D- signal of the USB Serial/JTAG controller; it has a high-level glitch of about 50000 ns during power-up and a default drive strength of 40 mA."
},
{
"number": "26",
"name": "GPIO19",
"type": "bidirectional",
"description": "General-purpose IO that is also the USB_D+ signal of the USB Serial/JTAG controller, with a default drive strength of 40 mA."
},
{
"number": "27",
"name": "U0RXD",
"type": "bidirectional",
"description": "UART0 receive data signal with the internal weak pull-up enabled; it has a low-level glitch of about 5 ns during power-up."
},
{
"number": "28",
"name": "U0TXD",
"type": "bidirectional",
"description": "UART0 transmit data signal with the internal weak pull-up enabled."
},
{
"number": "29",
"name": "XTAL_N",
"type": "passive",
"description": "Differential external clock input/output negative connected to the chip's crystal or oscillator."
},
{
"number": "30",
"name": "XTAL_P",
"type": "passive",
"description": "Differential external clock input/output positive connected to the chip's crystal or oscillator."
},
{
"number": "31",
"name": "VDDA",
"type": "power_in",
"description": "Input power supply for the analog power domain."
},
{
"number": "32",
"name": "VDDA",
"type": "power_in",
"description": "Input power supply for the analog power domain."
},
{
"number": "33",
"name": "GND",
"type": "power_in",
"description": "Ground connection, given as the exposed pad of the QFN32 package."
}
],
"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 hint says 32-VFQFN Exposed Pad, but the datasheet calls the package QFN32 (5×5 mm). The pin list"
],
"pages_sent": 38,
"cost_usd": 0.1059,
"at": "2026-10-27T23:34:15"
},
"datasheet": {
"url": "https://www.espressif.com/sites/default/files/documentation/esp32-c3_datasheet_en.pdf",
"pages": 76,
"sha256": "833fc000b4b3c3d3",
"source_tier": "mfr"
},
"cad": "KiCad official (CC-BY-SA 4.0)",
"pins": {
"total": 33,
"described": 33,
"cites_pages": true,
"refuses_to_fabricate": true
}
},
"viewers": {
"symbol": "viewers/symbol.html",
"footprint": "viewers/footprint.html"
},
"models_3d": [
{
"file": "esp32-c3fn4.step",
"role": "plain",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5,
5,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "ba0561bc79f5a9da290aa7993318c1df3e9b747fb31b8816e75afc092c57352b",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
},
{
"file": "esp32-c3fn4-etched.step",
"role": "eda",
"up": "Z",
"units": "mm",
"origin": "footprint origin = pad-pattern centre",
"seat": "z = 0",
"extents_mm": [
5,
5,
0.77
],
"zmin_mm": 0,
"centre_offset_mm": 0,
"footprint_binding": "identity",
"sha256": "f37128ad1f2f0c1cc4f3b46869d9ca409007c6bf8ef01d7b47de0892ccebdf9b",
"checked": "2026-10-27",
"checked_by": "factory/step_pose.py (Z-up, origin, seat, binding)"
}
]
},
"metadata": {
"specs": {
"Manufacturer": "Espressif Systems",
"Package": "32-VFQFN Exposed Pad",
"Category": "RF and Wireless",
"Pins": "33"
},
"characteristics": {
"version": 1,
"source": "datasheet",
"datasheet_sha256": "833fc000b4b3c3d39c496fcbd597fed5806956503ce7390b19cc8ae82f19f968",
"rows": [
{
"name": "Input power pins allowed input voltage",
"symbol": "",
"kind": "absolute_maximum",
"unit": "V",
"min": -0.3,
"typ": null,
"max": 3.6,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Cumulative IO output current",
"symbol": "",
"kind": "absolute_maximum",
"unit": "mA",
"min": null,
"typ": null,
"max": 1000,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Storage temperature",
"symbol": "",
"kind": "absolute_maximum",
"unit": "°C",
"min": -40,
"typ": null,
"max": 150,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Recommended input voltage (VDDA, VDD3P3, VDD3P3_RTC)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 3,
"typ": 3.3,
"max": 3.6,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Recommended input voltage (VDD3P3_CPU)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 3,
"typ": 3.3,
"max": 3.6,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Recommended input voltage (VDD_SPI as input)",
"symbol": "",
"kind": "recommended_operating",
"unit": "V",
"min": 3,
"typ": 3.3,
"max": 3.6,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Cumulative input current",
"symbol": "IV DD",
"kind": "recommended_operating",
"unit": "A",
"min": 0.5,
"typ": null,
"max": null,
"conditions": "",
"source_page": 54,
"source": "datasheet"
},
{
"name": "Internal and output resistance, VDD_SPI powered by VDD3P3_CPU via RSPI",
"symbol": "RSPI",
"kind": "electrical",
"unit": "Ω",
"min": null,
"typ": 7.5,
"max": null,
"conditions": "VDD_SPI powered by VDD3P3_CPU via RSPI for 3.3 V flash",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Pin capacitance",
"symbol": "CIN",
"kind": "electrical",
"unit": "pF",
"min": null,
"typ": 2,
"max": null,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "High-level input voltage (fraction of VDD)",
"symbol": "VIH",
"kind": "electrical",
"unit": "×VDD",
"min": 0.75,
"typ": null,
"max": null,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Low-level input voltage (fraction of VDD)",
"symbol": "VIL",
"kind": "electrical",
"unit": "×VDD",
"min": null,
"typ": null,
"max": 0.25,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "High-level input current",
"symbol": "IIH",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Low-level input current",
"symbol": "IIL",
"kind": "electrical",
"unit": "nA",
"min": null,
"typ": null,
"max": 50,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "High-level output voltage (fraction of VDD)",
"symbol": "VOH",
"kind": "electrical",
"unit": "×VDD",
"min": 0.8,
"typ": null,
"max": null,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Low-level output voltage (fraction of VDD)",
"symbol": "VOL",
"kind": "electrical",
"unit": "×VDD",
"min": null,
"typ": null,
"max": 0.1,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "High-level source current",
"symbol": "IOH",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 40,
"max": null,
"conditions": "VDD = 3.3 V, VOH >= 2.64 V, PAD_DRIVER = 3",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Low-level sink current",
"symbol": "IOL",
"kind": "electrical",
"unit": "mA",
"min": null,
"typ": 28,
"max": null,
"conditions": "VDD = 3.3 V, VOL = 0.495 V, PAD_DRIVER = 3",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Internal weak pull-up resistor",
"symbol": "RPU",
"kind": "electrical",
"unit": "kΩ",
"min": null,
"typ": 45,
"max": null,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Internal weak pull-down resistor",
"symbol": "RPD",
"kind": "electrical",
"unit": "kΩ",
"min": null,
"typ": 45,
"max": null,
"conditions": "",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Chip reset release voltage (fraction of VDD)",
"symbol": "VIH_nRST",
"kind": "electrical",
"unit": "×VDD",
"min": 0.75,
"typ": null,
"max": null,
"conditions": "CHIP_EN voltage is within the specified range",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Chip reset voltage (fraction of VDD)",
"symbol": "VIL_nRST",
"kind": "electrical",
"unit": "×VDD",
"min": null,
"typ": null,
"max": 0.25,
"conditions": "CHIP_EN voltage is within the specified range",
"source_page": 55,
"source": "datasheet"
},
{
"name": "Differential nonlinearity",
"symbol": "DNL",
"kind": "electrical",
"unit": "LSB",
"min": -7,
"typ": null,
"max": 7,
"conditions": "ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi off",
"source_page": 56,
"source": "datasheet"
},
{
"name": "Integral nonlinearity",
"symbol": "INL",
"kind": "electrical",
"unit": "LSB",
"min": -12,
"typ": null,
"max": 12,
"conditions": "ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi off",
"source_page": 56,
"source": "datasheet"
},
{
"name": "Sampling rate",
"symbol": "",
"kind": "electrical",
"unit": "kSPS",
"min": null,
"typ": null,
"max": 100,
"conditions": "",
"source_page": 56,
"source": "datasheet"
},
{
"name": "ADC total error ATTEN0",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": -10,
"typ": null,
"max": 10,
"conditions": "effective measurement range of 0 ~ 750",
"source_page": 56,
"source": "datasheet"
},
{
"name": "ADC total error ATTEN1",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": -10,
"typ": null,
"max": 10,
"conditions": "effective measurement range of 0 ~ 1050",
"source_page": 56,
"source": "datasheet"
},
{
"name": "ADC total error ATTEN2",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": -10,
"typ": null,
"max": 10,
"conditions": "effective measurement range of 0 ~ 1300",
"source_page": 56,
"source": "datasheet"
},
{
"name": "ADC total error ATTEN3",
"symbol": "",
"kind": "electrical",
"unit": "mV",
"min": -35,
"typ": null,
"max": 35,
"conditions": "effective measurement range of 0 ~ 2500",
"source_page": 56,
"source": "datasheet"
},
{
"name": "Power supply voltage (1.8 V flash)",
"symbol": "VCC",
"kind": "electrical",
"unit": "V",
"min": 1.65,
"typ": 1.8,
"max": 2,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Power supply voltage (3.3 V flash)",
"symbol": "VCC",
"kind": "electrical",
"unit": "V",
"min": 2.7,
"typ": 3.3,
"max": 3.6,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Maximum clock frequency",
"symbol": "FC",
"kind": "electrical",
"unit": "MHz",
"min": 80,
"typ": null,
"max": null,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Program/erase cycles",
"symbol": "",
"kind": "electrical",
"unit": "cycles",
"min": 100000,
"typ": null,
"max": null,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Data retention time",
"symbol": "TRET",
"kind": "electrical",
"unit": "years",
"min": 20,
"typ": null,
"max": null,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Page program time",
"symbol": "TPP",
"kind": "timing",
"unit": "ms",
"min": null,
"typ": 0.8,
"max": 5,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Sector erase time (4 KB)",
"symbol": "TSE",
"kind": "timing",
"unit": "ms",
"min": null,
"typ": 70,
"max": 500,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Block erase time (32 KB)",
"symbol": "TBE1",
"kind": "timing",
"unit": "s",
"min": null,
"typ": 0.2,
"max": 2,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Block erase time (64 KB)",
"symbol": "TBE2",
"kind": "timing",
"unit": "s",
"min": null,
"typ": 0.3,
"max": 3,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Chip erase time (16 Mb)",
"symbol": "TCE",
"kind": "timing",
"unit": "s",
"min": null,
"typ": 7,
"max": 20,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Chip erase time (32 Mb)",
"symbol": "TCE",
"kind": "timing",
"unit": "s",
"min": null,
"typ": 20,
"max": 60,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Chip erase time (64 Mb)",
"symbol": "TCE",
"kind": "timing",
"unit": "s",
"min": null,
"typ": 25,
"max": 100,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Chip erase time (128 Mb)",
"symbol": "TCE",
"kind": "timing",
"unit": "s",
"min": null,
"typ": 60,
"max": 200,
"conditions": "",
"source_page": 57,
"source": "datasheet"
},
{
"name": "Chip erase time (256 Mb)",
"symbol": "TCE",
"kind": "timing",
"unit": "s",
"min": null,
"typ": 70,
"max": 300,
"conditions": "",
"source_page": 58,
"source": "datasheet"
}
]
}
},
"variants": [],
"sections": [
"hero",
"viewers",
"readme",
"breadcrumbs",
"info"
],
"discovery_triggers": [
"esp32-c3fn4"
],
"discovery_pitch": "ESP32-C3FN4 (Espressif Systems) component page: datasheet pinout, KiCad symbol, footprint and 3D.",
"author": {
"name": "Ray",
"email": "[email protected]"
},
"dependencies": {},
"hero": {
"type": "image",
"path": "docs/hero.png"
},
"files": [
"page.json",
"README.md",
"esp32-c3fn4.kicad_sym",
"esp32-c3fn4.kicad_mod",
"esp32-c3fn4.glb",
"esp32-c3fn4.step",
"esp32-c3fn4.lbr",
"docs/hero.png",
"docs/esp32-c3fn4-datasheet.pdf",
"viewers/symbol.html",
"viewers/footprint.html",
"esp32-c3fn4-hero.glb",
"esp32-c3fn4-hero.overlay.json",
"esp32-c3fn4-etched.glb"
],
"visibility": {
"public": true
}
}