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ESP32-C3FN4

Ultra-Low-Power SoC with RISC-V Single-Core CPU

The ESP32-C3FN4 is a ultra-low-power soc with risc-v single-core cpu from Espressif Systems. View the full ESP32-C3FN4 datasheet below including key specifications, pinout, electrical characteristics, absolute maximum ratings.

ESP32-C3FN4 shares its datasheet with ESP32-C3-WROOM-02-H4, whose page lists every part number it covers.

Official ESP32-C3FN4 datasheet (PDF) — the source this page was extracted from.

Manufacturer

Espressif Systems

Category

Ultra-Low-Power SoC with RISC-V Single-Core CPU

Package

32-VFQFN Exposed Pad

Lifecycle

Obsolete

ESP32-C3FN4 Key Specifications

ParameterValue
Antenna TypeAntenna Not Included
Current - Receiving84mA ~ 87mA
Current - Transmitting276mA ~ 335mA
Data Rate54Mbps
DigiKey ProgrammableNot Verified
Frequency2.402GHz ~ 2.48GHz
Memory Size4MB Flash, 400kB SRAM, 384kB ROM
Mounting TypeSurface Mount
Operating Temperature-40°C ~ 85°C (TA)
Package / Case32-VFQFN Exposed Pad
PackagingMouseReel
Power - Output21dBm
Protocol802.11b/g/n, Bluetooth v5.0
RF Family/StandardBluetooth, WiFi
Sensitivity-105dBm
Serial InterfacesGPIO, I2C, I2S, SPI, JTAG, UART, USB
Standard Pack Qty5000
Supply Voltage3V ~ 3.6V

ESP32-C3FN4 Overview

Part: ESP32-C3-WROOM-02-H4 — Espressif Systems

Type: Wi-Fi and Bluetooth LE Module (ESP32-C3 based)

Description: 2.4 GHz Wi-Fi (802.11b/g/n) and Bluetooth 5 LE module built around the ESP32-C3 single-core 32-bit RISC-V CPU at up to 160 MHz, with 4 MB Quad SPI flash, 15 GPIOs and an on-board PCB antenna, rated for -40 to 105 °C ambient.

Operating Conditions:

  • Supply voltage (VDD33): 3.0–3.6 V (3.3 V typ)
  • Operating ambient temperature: -40 to 105 °C for the H4 variant (the N-variants are rated -40 to 85 °C)
  • Current delivered by external power supply: 0.5 A min

Absolute Maximum Ratings:

  • Max supply voltage (VDD33): 3.6 V (min -0.3 V)
  • Storage temperature: -40 to 105 °C

Key Specs:

  • CPU: 32-bit RISC-V single-core, up to 160 MHz
  • Memory: 384 KB ROM, 400 KB SRAM (16 KB for cache), 8 KB RTC SRAM
  • Flash: 4 MB Quad SPI (default max flash clock 80 MHz)
  • Wi-Fi: IEEE 802.11b/g/n, 2412–2484 MHz, 1T1R, up to 150 Mbps, 20/40 MHz bandwidth
  • Bluetooth LE 5 with 125 Kbps, 500 Kbps, 1 Mbps and 2 Mbps rates; Bluetooth mesh
  • GPIOs: up to 15
  • Module size: 18.0 × 20.0 × 3.2 mm
  • Embedded chip revision: v0.4
  • Strapping pin hold time (tH): 3 ms min

Features:

  • On-board PCB antenna (the -02U variant uses an external antenna connector)
  • Integrated 40 MHz crystal oscillator and SPI flash
  • Peripherals: SPI, UART, I2C, I2S, remote control, LED PWM, general DMA, TWAI (ISO 11898-1 compatible), USB Serial/JTAG, temperature sensor, SAR ADC, timers, watchdogs
  • Wi-Fi: WMM, A-MPDU/A-MSDU, 4 virtual interfaces, Station/SoftAP/Station+SoftAP/promiscuous modes, 802.11mc FTM
  • Bluetooth LE: advertising extensions, multiple advertisement sets, channel selection algorithm #2
  • Internal Wi-Fi/Bluetooth coexistence sharing the same antenna
  • RoHS/REACH green certification

Applications:

  • Smart home
  • Industrial automation
  • Health care
  • Consumer electronics
  • Smart agriculture
  • POS machines
  • Service robots
  • Audio devices
  • Low-power IoT sensor hubs
  • Low-power IoT data loggers

Package:

  • Module with 19 pins, 18.0 × 20.0 × 3.2 mm (ESP32-C3-WROOM-02 series)

ESP32-C3FN4 Features

  • Supports Single SPI, Dual SPI, and Quad SPI, QPI modes
  • Configurable clock frequency with a maximum of 120 MHz in Single Transfer Rate (STR) mode
  • Data transmission is in bytes

ESP32-C3FN4 Applications

  • Smart Home
  • Industrial Automation
  • Health Care
  • Consumer Electronics
  • Smart Agriculture
  • POS Machines
  • Service Robot
  • Audio Devices
  • Generic Low-power IoT Sensor Hubs
  • Generic Low-power IoT Data Loggers

ESP32-C3FN4 Pin Configuration

ESP32-C3FN4 Pinout

Package: 32-VFQFN Exposed Pad

Pin NumberPin NameTypeFunction
1GNDPGround
2GNDPGround
33V3PPower supply
4NC–No Connect
5IO2I/O/TGPIO2, ADC1_CH2, FSPIQ
6IO3I/O/TGPIO3, ADC1_CH3
7NC–No Connect
8ENIHigh: on, enables the chip. Low: off, the chip powers off. Note: Do not leave the EN pin floating.
9NC–No Connect
10NC–No Connect
11GNDPGround
12IO0I/O/TGPIO0, ADC1_CH0, XTAL_32K_P
13IO1I/O/TGPIO1, ADC1_CH1, XTAL_32K_N
14GNDPGround
15NC–No Connect
16IO10I/O/TGPIO10, FSPICS0
17NC–No Connect
18IO4I/O/TGPIO4, ADC1_CH4, FSPIHD, MTMS
19IO5I/O/TGPIO5, ADC2_CH0, FSPIWP, MTDI
20IO6I/O/TGPIO6, FSPICLK, MTCK
21IO7I/O/TGPIO7, FSPID, MTDO
22IO8I/O/TGPIO8
23IO9I/O/TGPIO9
24NC–No Connect
25NC–No Connect
26IO18I/O/TGPIO18, USB_D−
27IO19I/O/TGPIO19, USB_D+
28NC–No Connect
29NC–No Connect
30RXD0I/O/TGPIO20, U0RXD
31TXD0I/O/TGPIO21, U0TXD
32NC–No Connect
33NC–No Connect
34NC–No Connect
35NC–No Connect
36–53GNDPGround

Notes

  • The datasheet states the module has 53 pins total; pins 36–53 are all GND (ground).
  • Pin numbers are sourced directly from Table 2 in the datasheet ("No." column).
  • Type "P" denotes power/ground pins; "I" denotes input; "I/O/T" denotes GPIO with input/output and 3.3V tolerance.
  • EN pin (pin 8) must not be left floating.
  • USB pins (IO18/IO19) support USB D−/D+ signaling.

ESP32-C3FN4 Electrical Characteristics

Table 6-3. DC Characteristics (3.3 V, 25 °C)

ParameterDescriptionMinTypMaxUnit
C INPin capacitance-2-pF
V IHHigh-level input voltage0.75 × VDD 1-VDD 1 + 0.3V
V ILLow-level input voltage-0.3-0.25 × VDD 1V
I IHHigh-level input current--50nA
I ILLow-level input current--50nA
V OH 2High-level output voltage0.8 × VDD 1--V
V OL 2Low-level output voltage--0.1 × VDD 1V
I OHHigh-level source current (VDD 1 = 3.3 V, V OH >= 2.64 V, PAD_DRIVER = 3)-40-mA
I OLLow-level sink current (VDD 1 = 3.3 V, V OL = 0.495 V, PAD_DRIVER = 3)-28-mA
R PUInternal weak pull-up resistor-45-k Ω
R PDInternal weak pull-down resistor-45-k Ω
V IH _ nRSTChip reset release voltage CHIP_EN voltage is within the specified range)0.75 × VDD 1-VDD 1 + 0.3V
V IL _ nRSTChip reset voltage (CHIP_EN voltage is within the specified range)-0.3-0.25 × VDD 1V

ESP32-C3FN4 Absolute Maximum Ratings

Stresses above those listed in T able 6-1 Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under T able 6-2 Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

Table 6-1. Absolute Maximum Ratings

SymbolParameterMinMaxUnit
VDD33Power supply voltage-0.33.6V
T STOREStorage temperature-40105°C

ESP32-C3FN4 Recommended Operating Conditions

Table 6-2. Recommended Operating Conditions

SymbolParameterMin TypMaxUnit
VDD33Power supply voltagePower supply voltage3.03.33.6V
I VDDCurrent delivered by external power supplyCurrent delivered by external power supply0.5--A
T AOperating ambient temperature85 °C version 105 °C version-40-85 105°C

ESP32-C3FN4 Package Information

This section provides the following resources for your reference:

  • Figures for recommended PCB land patterns with all the dimensions needed for PCB design. See Figure 11-1 ESP32-C3-WROOM-02 Recommended PCB Land Pattern and Figure 11-2 ESP32-C3-WROOM-02U Recommended PCB Land Pattern .
  • Source files of recommended PCB land patterns to measure dimensions not covered in Figure 11-1 and Figure 11-2. You can view the source files for ESP32-C3-WROOM-02 and ESP32-C3-WROOM-02U with Autodesk Viewer.
  • 3D models of ESP32-C3-WROOM-02 and ESP32-C3-WROOM-02U. Please make sure that you download the 3D model file in .STEP format. Beware that some browsers might add .txt.

Figure 11-1. ESP32-C3-WROOM-02 Recommended PCB Land Pattern

Figure 11-2. ESP32-C3-WROOM-02U Recommended PCB Land Pattern

Variants on the same datasheet

These parts have exact links to the same datasheet. They are candidates to compare, not verified drop-in replacements; check package, pinout and electrical limits.

Part NumberManufacturerPackage
ESP32Espressif SystemsESP32-WROOM-32E (18.0 x 25.5 x 3.1 mm)
ESP32-C3Espressif Systems32-VFQFN Exposed Pad
ESP32-C3-WROOM-02-H4Espressif Systems32-SMD Module
ESP32-C3-WROOM-02-N4Espressif Systems19-SMD Module
ESP32-C3FH4Espressif Systems32-VFQFN Exposed Pad

More datasheets

All Espressif Systems datasheets (86)

Data on this page is extracted from publicly available manufacturer datasheets using automated tools including AI. It may contain errors or omissions. Always verify specifications against the official manufacturer datasheet before making design or purchasing decisions. See our Terms of Service. Rights holders can submit a takedown request.

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