component
ESP8684H2X
Public Made by Adomby adom
Espressif Systems RF and Wireless, QFN-24-1EP_4x4mm_P0.5mm_EP2.8x2.8mm. 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
markdownESP8684H2X
Espressif Systems · RF and Wireless · QFN-24-1EP_4x4mm_P0.5mm_EP2.8x2.8mm
ESP8684H2X from Espressif Systems, in a QFN-24-1EP_4x4mm_P0.5mm_EP2.8x2.8mm. 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 for the antenna. |
| 2 | VDDA3P3 | power_in | Analog power domain supply input. |
| 3 | VDDA3P3 | power_in | Analog power domain supply input. |
| 4 | GPIO0 | bidirectional | IO pin powered by VDD3P3_RTC with ADC1_CH0 analog function and default drive strength of 20 mA. |
| 5 | GPIO1 | bidirectional | IO pin powered by VDD3P3_RTC with ADC1_CH1 analog function and default drive strength of 20 mA. |
| 6 | GPIO2 | bidirectional | IO pin powered by VDD3P3_RTC with input enabled at reset and ADC1_CH2 analog function; FSPIQ is available on function F2. |
| 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 | IO pin powered by VDD3P3_RTC with input enabled at reset and ADC1_CH3 analog function. |
| 9 | MTMS | bidirectional | JTAG test mode select, powered by VDD3P3_RTC, with ADC1_CH4 analog function on GPIO4. |
| 10 | MTDI | bidirectional | JTAG test data input, powered by VDD3P3_RTC. |
| 11 | VDD3P3_RTC | power_in | Power input for the RTC and part of the digital power domains. |
| 12 | MTCK | bidirectional | JTAG test clock, powered by VDD3P3_CPU. |
| 13 | MTDO | bidirectional | JTAG test data output, powered by VDD3P3_CPU. |
| 14 | GPIO8 | bidirectional | IO pin powered by VDD3P3_CPU with input enabled at reset. |
| 15 | GPIO9 | bidirectional | IO pin powered by VDD3P3_CPU with input enabled and internal weak pull-up enabled after reset. |
| 16 | GPIO10 | bidirectional | IO pin powered by VDD3P3_CPU; FSPICS0 is available on function F2. |
| 17 | VDD3P3_CPU | power_in | Power input for the digital power domain. |
| 18 | GPIO18 | bidirectional | IO pin powered by VDD3P3_CPU. |
| 19 | U0RXD | bidirectional | UART0 receive data pin, powered by VDD3P3_CPU with input enabled and weak pull-up enabled after reset. |
| 20 | U0TXD | bidirectional | UART0 transmit data pin, powered by VDD3P3_CPU with output enabled and weak pull-up enabled after reset. |
| 21 | VDDA | power_in | Analog power domain supply input. |
| 22 | XTAL_N | passive | External clock input/output connected to the crystal or oscillator (negative side of differential clock). |
| 23 | XTAL_P | passive | External clock input/output connected to the crystal or oscillator (positive side of differential clock). |
| 24 | VDDA | power_in | Analog power domain supply input. |
| 25 | GND | power_in | External ground connection. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Espressif Systems |
| Package | QFN-24-1EP_4x4mm_P0.5mm_EP2.8x2.8mm |
| Category | RF and Wireless |
| 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 | 730 | mA | 43 | ||||
| Storage temperature | TSTORE | -40 | 150 | °C | 43 | ||
| Recommended input voltage (VDDA3P3, VDDA, VDD3P3_RTC, VDD3P3_CPU) | 3 | 3.3 | 3.6 | V | 43 | ||
| Cumulative input current | 0.5 | A | 43 | ||||
| Ambient temperature | TA | -40 | 105 | °C | 43 | ||
| High-level input current | IIH | 50 | nA | 42 | |||
| Low-level input current | IIL | 50 | nA | 42 | |||
| Differential nonlinearity (ADC connected to an external 100 nF capacitor) | DNL | -1 | 3 | LSB | ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi off | 43 | |
| Integral nonlinearity (ADC connected to an external 100 nF capacitor) | INL | -4 | 8 | LSB | ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi off | 43 | |
| Sampling rate | 100 | kSPS | 43 | ||||
| Total error, ATTEN0 | -5 | 5 | mV | effective measurement range of 0 ~ 950 | 43 | ||
| Total error, ATTEN3 | -10 | 10 | mV | effective measurement range of 0 ~ 2800 | 43 |
CAD (KiCad official)
- Symbol:
ESP8684H2X - Footprint:
Package_DFN_QFN:QFN-24-1EP_4x4mm_P0.5mm_EP2.8x2.8mm - 3D model: QFN-24-1EP_4x4mm_P0.5mm_EP2.8x2.8mm (KiCad packages3D, STEP)
- 3D model files:
esp8684h2x-etched.step/esp8684h2x-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);esp8684h2x.step/esp8684h2x.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 2026-10-29, 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).