component
ESP8684H4X
Public Made by Adomby adom
Espressif Systems WiFi Modules, QFN-24(4x4). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownESP8684H4X
Espressif Systems · WiFi Modules · QFN-24(4x4)
ESP8684H4X from Espressif Systems, in a QFN-24(4x4). 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 | ANT | bidirectional | RF input and output pin connected to the antenna. |
| 2 | VDDA3P3 | power_in | Input power supply for the analog power domain. |
| 3 | VDDA3P3 | power_in | Input power supply for the analog power domain. |
| 4 | GPIO0 | bidirectional | Multiplexed IO powered by VDD3P3_RTC with IO MUX function GPIO0 and analog function ADC1_CH0; default drive strength is 20 mA. |
| 5 | GPIO1 | bidirectional | Multiplexed IO powered by VDD3P3_RTC with IO MUX function GPIO1 and analog function ADC1_CH1; default drive strength is 20 mA. |
| 6 | GPIO2 | bidirectional | Multiplexed IO powered by VDD3P3_RTC with input enabled at reset, IO MUX functions GPIO2 and FSPIQ, and analog function ADC1_CH2; default drive strength is 20 mA. |
| 7 | CHIP_EN | input | High enables the chip (powered up) and low disables it (powered down); do not leave this pin floating. |
| 8 | GPIO3 | bidirectional | Multiplexed IO powered by VDD3P3_RTC with input enabled at reset, IO MUX function GPIO3 and analog function ADC1_CH3; default drive strength is 20 mA. |
| 9 | MTMS | bidirectional | Multiplexed IO powered by VDD3P3_RTC with JTAG test mode select (MTMS) and analog function ADC1_CH4; default drive strength is 20 mA. |
| 10 | MTDI | bidirectional | Multiplexed IO powered by VDD3P3_RTC with JTAG test data input (MTDI); default drive strength is 20 mA. |
| 11 | VDD3P3_RTC | power_in | Input power supply for the RTC and part of the digital power domains, including RTC IO pins. |
| 12 | MTCK | bidirectional | Multiplexed IO powered by VDD3P3_CPU with JTAG test clock (MTCK); default drive strength is 20 mA. |
| 13 | MTDO | bidirectional | Multiplexed IO powered by VDD3P3_CPU with JTAG test data output (MTDO); default drive strength is 20 mA. |
| 14 | GPIO8 | bidirectional | Multiplexed digital IO powered by VDD3P3_CPU with input enabled at reset and IO MUX function GPIO8; default drive strength is 20 mA. |
| 15 | GPIO9 | bidirectional | Multiplexed digital IO powered by VDD3P3_CPU with input enabled and internal weak pull-up enabled after reset; default drive strength is 20 mA. |
| 16 | GPIO10 | bidirectional | Multiplexed digital IO powered by VDD3P3_CPU with IO MUX functions GPIO10 and FSPICS0; default drive strength is 20 mA. |
| 17 | VDD3P3_CPU | power_in | Input power supply for the digital power domain, which powers the digital IO pins. |
| 18 | GPIO18 | bidirectional | Multiplexed digital IO powered by VDD3P3_CPU with IO MUX function GPIO18; default drive strength is 20 mA. |
| 19 | U0RXD | bidirectional | UART0 receive data pin, powered by VDD3P3_CPU, with input enabled and internal weak pull-up enabled; default drive strength is 20 mA. |
| 20 | U0TXD | bidirectional | UART0 transmit data pin, powered by VDD3P3_CPU, with output enabled and internal weak pull-up enabled; default drive strength is 20 mA. |
| 21 | VDDA | power_in | Input power supply for the analog power domain. |
| 22 | XTAL_N | bidirectional | External clock input/output connected to the chip's crystal or oscillator (negative side of the differential clock). |
| 23 | XTAL_P | bidirectional | External clock input/output connected to the chip's crystal or oscillator (positive side of the differential clock). |
| 24 | VDDA | power_in | Input power supply for the analog power domain. |
| 25 | GND | power_in | External ground connection. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | QFN-24(4x4) |
| Category | IoT/Communication Modules |
| Pins | 25 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input power pins allowed input voltage | -0.3 | 3.6 | V | 43 | |||
| Cumulative IO output current | Ioutput | 730 | mA | 43 | |||
| Storage temperature | TST | -40 | 150 | °C | 43 | ||
| Recommended input voltage | VDDA3P3, VDDA, VDD3P3_RTC, VDD3P3_CPU | 3 | 3.3 | 3.6 | V | 42 | |
| Cumulative input current | IVDD | 0.5 | A | 42 | |||
| Ambient temperature | TA | -40 | 105 | °C | 42 | ||
| High-level input current | IIH | 50 | nA | 42 | |||
| Low-level input current | IIL | 50 | nA | 42 | |||
| Differential nonlinearity (DNL) | DNL | -1 | 3 | LSB | ADC with external 100 nF capacitor; DC signal input; ambient 25 °C; Wi-Fi off | 43 | |
| Integral nonlinearity (INL) | INL | -4 | 8 | LSB | ADC with external 100 nF capacitor; DC signal input; ambient 25 °C; Wi-Fi off | 43 | |
| Sampling rate | 100 | kSPS | 43 | ||||
| Total error ATTEN0 effective measurement range 0 ~ 950 | -5 | 5 | mV | ATTEN0, effective measurement range of 0 ~ 950 | 43 | ||
| Total error ATTEN3 effective measurement range 0 ~ 2800 | -10 | 10 | mV | ATTEN3, effective measurement range of 0 ~ 2800 | 43 | ||
| Sensitivity (Bluetooth LE 1 Mbps) | -98 | dBm | @30.8% PER | 49 | |||
| Maximum received signal (Bluetooth LE 1 Mbps) | 8 | dBm | @30.8% PER | 49 | |||
| Intermodulation (Bluetooth LE 1 Mbps) | -31 | dBm | 49 | ||||
| Sensitivity (Bluetooth LE 2 Mbps) | -95 | dBm | @30.8% PER | 50 | |||
| Maximum received signal (Bluetooth LE 2 Mbps) | 8 | dBm | @30.8% PER | 50 | |||
| Intermodulation (Bluetooth LE 2 Mbps) | -33 | dBm | 50 | ||||
| Sensitivity (Bluetooth LE 500 Kbps) | -102 | dBm | @30.8% PER | 51 | |||
| Maximum received signal (Bluetooth LE 500 Kbps) | 8 | dBm | @30.8% PER | 51 | |||
| Sensitivity (Bluetooth LE 125 Kbps) | -106 | dBm | @30.8% PER | 52 | |||
| Maximum received signal (Bluetooth LE 125 Kbps) | 8 | dBm | @30.8% PER | 52 |
CAD (KiCad official)
- Symbol:
ESP8684H4X - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.8x2.8mm - 3D model: QFN-24(4x4) (KiCad packages3D, STEP)
- 3D model files:
esp8684h4x-etched.step/esp8684h4x-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esp8684h4x.step/esp8684h4x.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Espressif Systems datasheet (60 pp, sha256
5d5e6894fbcd9ab5, retrieved 2026-10-27, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-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).