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ESP32-C3-MINI-1U-N4

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Espressif Systems WiFi Modules, ESP32-C3-MINI-1U. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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ESP32-C3-MINI-1U-N4

Espressif Systems · WiFi Modules · ESP32-C3-MINI-1U

ESP32-C3-MINI-1U-N4 from Espressif Systems, in a ESP32-C3-MINI-1U. 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 pin.
2 GND power_in Ground pin.
3 3V3 power_in Power supply pin; the module supply VDD33 is specified at 3.0 V to 3.6 V (3.3 V typical) with an absolute maximum of 3.6 V.
4 NC unconnected Not connected; no function is assigned to this pin on the module.
5 IO2 bidirectional GPIO2 with ADC1_CH2 and FSPIQ functions; it is a chip boot-mode strapping pin and is floating by default at reset.
6 IO3 bidirectional GPIO3 with ADC1_CH3 function.
7 NC unconnected Not connected; no function is assigned to this pin on the module.
8 EN input High enables the chip and low powers it off; the pin must not be left floating.
9 NC unconnected Not connected; no function is assigned to this pin on the module.
10 NC unconnected Not connected; no function is assigned to this pin on the module.
11 GND power_in Ground pin.
12 IO0 bidirectional GPIO0 with ADC1_CH0 and XTAL_32K_P functions.
13 IO1 bidirectional GPIO1 with ADC1_CH1 and XTAL_32K_N functions.
14 GND power_in Ground pin.
15 NC unconnected Not connected; no function is assigned to this pin on the module.
16 IO10 bidirectional GPIO10 with FSPICS0 function.
17 NC unconnected Not connected; no function is assigned to this pin on the module.
18 IO4 bidirectional GPIO4 with ADC1_CH4, FSPIHD and MTMS functions.
19 IO5 bidirectional GPIO5 with ADC2_CH0, FSPIWP and MTDI functions.
20 IO6 bidirectional GPIO6 with FSPICLK and MTCK functions.
21 IO7 bidirectional GPIO7 with FSPID and MTDO functions.
22 IO8 bidirectional GPIO8; it is a strapping pin used for chip boot mode and ROM message printing control, and is floating by default at reset.
23 IO9 bidirectional GPIO9; it is a chip boot-mode strapping pin with a weak pull-up by default (bit value 1).
24 NC unconnected Not connected; no function is assigned to this pin on the module.
25 NC unconnected Not connected; no function is assigned to this pin on the module.
26 IO18 bidirectional GPIO18 with USB_D- function.
27 IO19 bidirectional GPIO19 with USB_D+ function.
28 NC unconnected Not connected; no function is assigned to this pin on the module.
29 NC unconnected Not connected; no function is assigned to this pin on the module.
30 RXD0 bidirectional GPIO20 with U0RXD function (UART0 receive).
31 TXD0 bidirectional GPIO21 with U0TXD function (UART0 transmit).
32 NC unconnected Not connected; no function is assigned to this pin on the module.
33 NC unconnected Not connected; no function is assigned to this pin on the module.
34 NC unconnected Not connected; no function is assigned to this pin on the module.
35 NC unconnected Not connected; no function is assigned to this pin on the module.
36 GND power_in Ground pin.
37 GND power_in Ground pin.
38 GND power_in Ground pin.
39 GND power_in Ground pin.
40 GND power_in Ground pin.
41 GND power_in Ground pin.
42 GND power_in Ground pin.
43 GND power_in Ground pin.
44 GND power_in Ground pin.
45 GND power_in Ground pin.
46 GND power_in Ground pin.
47 GND power_in Ground pin.
48 GND power_in Ground pin.
49 GND power_in Ground pin; this is the exposed EPAD, and soldering it to the base-board ground is optional but improves thermal performance.
50 GND power_in Ground pin.
51 GND power_in Ground pin.
52 GND power_in Ground pin.
53 GND power_in Ground pin.

Key specifications

Parameter Value
Manufacturer Espressif Systems
Package ESP32-C3-MINI-1U
Category IoT/Communication Modules
Pins 53

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Absolute maximum power supply voltage VDD33 -0.3 3.6 V 21
Power supply voltage VDD33 3 3.3 3.6 V 21
Current delivered by external power supply IVDD 0.5 A 21
Operating ambient temperature TA -40 85 °C 85 °C version 21
High-level input current IIH 50 nA 21
Low-level input current IIL 50 nA 21
Flash power supply voltage (1.8 V) VCC 1.65 1.8 2 V Power supply voltage (1.8 V) 23
Flash power supply voltage (3.3 V) VCC 2.7 3.3 3.6 V Power supply voltage (3.3 V) 23
Flash maximum clock frequency FC 80 MHz 23
Flash program/erase cycles 100000 cycles 23
Flash data retention time TRET 20 years 23
Flash page program time TPP 0.8 5 ms 23
Flash sector erase time (4 KB) TSE 70 500 ms 23
Flash block erase time (32 KB) TBE1 0.2 2 s 23
Flash block erase time (64 KB) TBE2 0.3 3 s 23
Flash chip erase time (16 Mb) TCE 7 20 s 16 Mb 24
Flash chip erase time (32 Mb) TCE 20 60 s 32 Mb 24
Flash chip erase time (64 Mb) TCE 25 100 s 64 Mb 24
Flash chip erase time (128 Mb) TCE 60 200 s 128 Mb 24
Flash chip erase time (256 Mb) TCE 70 300 s 256 Mb 24
Wi-Fi center frequency range of operating channel 2412 2484 MHz 25
Bluetooth LE center frequency range of operating channel 2402 2480 MHz 27
RF transmit power range (Bluetooth LE) -24 20 dBm 27
TX EVM limit 802.11b 1 Mbps -10 dB 802.11b, 1 Mbps, @20.5 dBm 25
TX EVM limit 802.11b 11 Mbps -10 dB 802.11b, 11 Mbps, @20.5 dBm 25
TX EVM limit 802.11g 6 Mbps -5 dB 802.11g, 6 Mbps, @20 dBm 25
TX EVM limit 802.11g 54 Mbps -25 dB 802.11g, 54 Mbps, @18 dBm 25
TX EVM limit 802.11n HT20 MCS0 -5 dB 802.11n, HT20, MCS0, @19 dBm 26
TX EVM limit 802.11n HT20 MCS7 -27 dB 802.11n, HT20, MCS7, @17.5 dBm 26
TX EVM limit 802.11n HT40 MCS0 -5 dB 802.11n, HT40, MCS0, @18.5 dBm 26
TX EVM limit 802.11n HT40 MCS7 -27 dB 802.11n, HT40, MCS7, @17 dBm 26
External antenna connector contact resistance 20 mOHM 36
External antenna connector insulation resistance 500 MOHM 36
External antenna connector dielectric withstanding voltage 200 V AC for 1 minute 36
Temperature sensor range -40 125 °C 20

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
housing THERMOPLASTIC HOUSING MATERIAL: THERMOPLASTIC, WHITE, UL 94V-0; 36
contacts COPPER ALLOY gold CONTACT MATERIAL: COPPER ALLOY, GOLD PLATED ALL OVER; 36
shell COPPER ALLOY gold SHELL MATERIAL: COPPER ALLOY, GOLD PLATED ALL OVER; 36

CAD (KiCad official)

  • Symbol: ESP32-C3-MINI-1U-N4
  • Footprint: PCM_Espressif:ESP32-C3-MINI-1U
  • 3D model: ESP32-C3-MINI-1U (KiCad packages3D, STEP)
  • 3D model files: esp32-c3-mini-1u-n4-etched.step / esp32-c3-mini-1u-n4-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-c3-mini-1u-n4.step / esp32-c3-mini-1u-n4.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Espressif Systems datasheet (48 pp, sha256 de7361381348d82a, retrieved 2026-10-28, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF