ESP32-C3FN4 - 4MB Flash Wi-Fi & BLE Microcontroller Chip


Leave a review



Manufacturer: Espressif Systems

Delivery: Ships within 8 to 12 weeks
Free shipping to the US on orders over $100

We've Got You Covered

delivery truck

1 year comprehensive warranty support for all products

hand receiving items

30 day money back guarantee

*some exceptions apply

Product Information

Product Description

Authorized North America Distributor Stamp

The ESP32-C3FN4 SOC has 4MB flash and is the next generation replacement for the ESP8266EX SOC. This new chip makes new designs simple and is a very cost effective solution. Based on a single RISC-V core, performance has improved.

Other ESP32-C3FN4 updates include

  • advanced security
  • USB 2.0
  • BLE 5.0 with long range support
  • power management

The ESP32-C3FN4 is part of the ESP32-C3 family of parts and provides the lowest cost fully certified solution of all the Espressif parts.  

Trouble shooting is improved with on-chip debug module (DM), compliant with RISC-V debug specification v0.13. Also, an external debugger is supported using the industry-standard JTAG/USB port. The debugger provides direct system bus access (SBA) to memory and peripherals along with up to 8 trigger breakpoints/watchpoints.

ESP32-C3 Chip Comparison Guide


  • SMD IC ESP32-C3
  • RISC-V single-core MCU
  • 4 MB flash inside, 384 KB ROM, 400 KB SRAM (16 KB for cache), 8 KB SRAM in RTC
  • 2.4G Wi-Fi & BLE 5.0 combo
  • QFN 32-pin
  • 5*5 mm

Documents and Drivers


ESP32-C3FN4 Datasheet



LED PWM, Full Speed USB Serial/JTAG, General DMA, TWAI®


SPI, Duel SPI, Quad SPI, QPI, UART, I2C, I2S, 12-bit SAR ADCs, virtual Wi-Fi interfaces


  • 4MB Flash
  • 384 KB of ROM
  • 400 KB of on­chip SRAM
  • RTC memory: 8 KB of SRAM
  • 4 Kbit of eFuse



Temperature Range

-40°C to +85°C (-40°F to +185°F)


2 × 54-bit general-purpose timer

Watchdog Timer


Request a Quote

Curious about bulk pricing? Please fill out the information below and our sales team will provide a quote within 1 business day.

Customer Reviews

We have the best technical support engineers that know how to use our products.

If our Tech Support cannot solve your problem, we will contact the design engineer or manufacturer to help find a resolution.

Submit a Ticket