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Contents

Pinout
Key specifications
Electrical characteristics
CAD (KiCad official)
Provenance

README

markdown

ESP32-U4WDH

Espressif Systems · RF Transceiver ICs · QFN-48-EP(5x5)

ESP32-U4WDH from Espressif Systems, in a QFN-48-EP(5x5). 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	VDDA	power_in	Analog power supply, 2.3 V to 3.6 V.
2	LNA_IN	bidirectional	RF input and output pin, carrying the low-noise amplifier input signal and the power amplifier output signal.
3	VDD3P3	power_in	Analog power supply, 2.3 V to 3.6 V.
4	VDD3P3	power_in	Analog power supply, 2.3 V to 3.6 V.
5	SENSOR_VP	input	Input-only pin, GPIO36 with ADC1_CH0 and RTC_GPIO0 functions; it has no output driver or internal pull-up/pull-down.
6	SENSOR_CAPP	input	Input-only pin, GPIO37 with ADC1_CH1 and RTC_GPIO1 functions; it has no output driver or internal pull-up/pull-down.
7	SENSOR_CAPN	input	Input-only pin, GPIO38 with ADC1_CH2 and RTC_GPIO2 functions; it has no output driver or internal pull-up/pull-down.
8	SENSOR_VN	input	Input-only pin, GPIO39 with ADC1_CH3 and RTC_GPIO3 functions; it has no output driver or internal pull-up/pull-down.
9	CHIP_PU	input	High enables the chip and low shuts it down; the pin must not be left floating.
10	VDET_1	input	Input-only pin, GPIO34 with ADC1_CH6 and RTC_GPIO4 functions; it has no output driver or internal pull-up/pull-down.
11	VDET_2	input	Input-only pin, GPIO35 with ADC1_CH7 and RTC_GPIO5 functions; it has no output driver or internal pull-up/pull-down.
12	32K_XP	bidirectional	GPIO32 pin that serves as the 32.768 kHz crystal oscillator input, also ADC1_CH4, RTC_GPIO9 and TOUCH9.
13	32K_XN	bidirectional	GPIO33 pin that serves as the 32.768 kHz crystal oscillator output, also ADC1_CH5, RTC_GPIO8 and TOUCH8.
14	GPIO25	bidirectional	General-purpose I/O with ADC2_CH8, RTC_GPIO6, DAC_1 and EMAC_RXD0 functions, in the VDD3P3_RTC power domain.
15	GPIO26	bidirectional	General-purpose I/O with ADC2_CH9, RTC_GPIO7, DAC_2 and EMAC_RXD1 functions, in the VDD3P3_RTC power domain.
16	GPIO27	bidirectional	General-purpose I/O with ADC2_CH7, TOUCH7, RTC_GPIO17 and EMAC_RX_DV functions, in the VDD3P3_RTC power domain.
17	MTMS	bidirectional	JTAG MTMS signal (GPIO14), also ADC2_CH6, TOUCH6, HSPICLK, HS2_CLK, SD_CLK and EMAC_TXD2 functions, in the VDD3P3_RTC power domain.
18	MTDI	bidirectional	JTAG MTDI signal (GPIO12), also ADC2_CH5, TOUCH5, HSPIQ, HS2_DATA2, SD_DATA2 and EMAC_TXD3 functions, in the VDD3P3_RTC power domain.
19	VDD3P3_RTC	power_in	Input power supply for RTC IO and the RTC and CPU power domains, 2.3 V to 3.6 V.
20	MTCK	bidirectional	JTAG MTCK signal (GPIO13), also ADC2_CH4, TOUCH4, HSPID, HS2_DATA3, SD_DATA3 and EMAC_RX_ER functions, in the VDD3P3_RTC power domain.
21	MTDO	bidirectional	JTAG MTDO signal (GPIO15), also ADC2_CH3, TOUCH3, HSPICS0, HS2_CMD, SD_CMD and EMAC_RXD3 functions, in the VDD3P3_RTC power domain.
22	GPIO2	bidirectional	General-purpose I/O with ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0 and SD_DATA0 functions, in the VDD3P3_RTC power domain.
23	GPIO0	bidirectional	General-purpose I/O with ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1 and EMAC_TX_CLK functions, in the VDD3P3_RTC power domain.
24	GPIO4	bidirectional	General-purpose I/O with ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1 and EMAC_TX_ER functions, in the VDD3P3_RTC power domain.
25	GPIO16	bidirectional	General-purpose I/O in the VDD_SDIO power domain, with HS1_DATA4, U2RXD and EMAC_CLK_OUT functions.
26	VDD_SDIO	power_out	SDIO IO supply that is the output of an internal LDO fed from VDD3P3_RTC (3.3 V mode through 6 Ω, or 1.8 V mode up to 40 mA), and it can also be driven by an external supply.
27	GPIO17	bidirectional	General-purpose I/O in the VDD_SDIO power domain, with HS1_DATA5, U2TXD and EMAC_CLK_OUT_180 functions.
28	SD_DATA_2	bidirectional	GPIO9 pin used as SDIO data line 2 (SD_DATA2), also SPIHD, HS1_DATA2 and U1RXD functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies.
29	SD_DATA_3	bidirectional	GPIO10 pin used as SDIO data line 3 (SD_DATA3), also SPIWP, HS1_DATA3 and U1TXD functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies.
30	SD_CMD	bidirectional	GPIO11 pin used as SDIO command (SD_CMD), also SPICS0, HS1_CMD and U1RTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies.
31	SD_CLK	bidirectional	GPIO6 pin used as SDIO clock (SD_CLK), also SPICLK, HS1_CLK and U1CTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies.
32	SD_DATA_0	bidirectional	GPIO7 pin used as SDIO data line 0 (SD_DATA0), also SPIQ, HS1_DATA0 and U2RTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies.
33	SD_DATA_1	bidirectional	GPIO8 pin used as SDIO data line 1 (SD_DATA1), also SPID, HS1_DATA1 and U2CTS functions, in the VDD_SDIO power domain; the in-package flash/PSRAM-related GPIO guidance applies.
34	GPIO5	bidirectional	General-purpose I/O in the VDD3P3_CPU power domain, with VSPICS0, HS1_DATA6 and EMAC_RX_CLK functions.
35	GPIO18	bidirectional	General-purpose I/O in the VDD3P3_CPU power domain, with VSPICLK and HS1_DATA7 functions.
36	GPIO23	bidirectional	General-purpose I/O in the VDD3P3_CPU power domain, with VSPID and HS1_STROBE functions.
37	VDD3P3_CPU	power_in	Digital power supply for the CPU and digital IOs, 1.8 V to 3.6 V.
38	GPIO19	bidirectional	General-purpose I/O in the VDD3P3_CPU power domain, with VSPIQ, U0CTS and EMAC_TXD0 functions.
39	GPIO22	bidirectional	General-purpose I/O in the VDD3P3_CPU power domain, with VSPIWP, U0RTS and EMAC_TXD1 functions.
40	U0RXD	bidirectional	UART0 receive pin, also GPIO3 and CLK_OUT2, in the VDD3P3_CPU power domain.
41	U0TXD	bidirectional	UART0 transmit pin, also GPIO1, CLK_OUT3 and EMAC_RXD2, in the VDD3P3_CPU power domain.
42	GPIO21	bidirectional	General-purpose I/O in the VDD3P3_CPU power domain, with VSPIHD and EMAC_TX_EN functions.
43	VDDA	power_in	Analog power supply, 2.3 V to 3.6 V.
44	XTAL_N	bidirectional	External clock input/output connected to the chip crystal or oscillator (differential negative side).
45	XTAL_P	bidirectional	External clock input/output connected to the chip crystal or oscillator (differential positive side).
46	VDDA	power_in	Analog power supply, 2.3 V to 3.6 V.
47	CAP2	input	Connects to a 3.3 nF series capacitor to ground, as stated in the revision history for Table 2-1.
48	CAP1	input	Connects to a 10 nF series capacitor to ground.
49	GND	power_in	External ground connection; the exposed pad on the package is the ground connection.

Key specifications

Parameter	Value
Manufacturer	Espressif Systems
Package	QFN-48-EP(5x5)
Category	Radio Frequency Chip/Antenna
Pins	49

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Allowed input voltage (VDDA, VDD3P3, VDD3P3_RTC, VDD3P3_CPU, VDD_SDIO)		-0.3		3.6	V		51
Cumulative IO output current	Ioutput			1200	mA		51
Storage temperature	TSTORE	-40		150	°C		51
Allowed input voltage (VDDA, VDD3P3_RTC, VDD3P3, VDD_SDIO 3.3 V mode)		3	3.3	3.6	V	Chip with in-package flash or PSRAM (note 2: minimum 3.0 V; no in-package flash/PSRAM minimum is 2.3 V)	51
Voltage applied to power supply pin VDD3P3_CPU		1.8	3.3	3.6	V		51
Current delivered by external power supply	IVDD	0.5			A		51
Operating temperature	T	-40		85	°C	ESP32-U4WDH, due to in-package flash or PSRAM (note 3)	51
High-level input current	IIH			50	nA		52
Low-level input current	IIL			50	nA		52
Low-level input voltage of CHIP_PU to shut down the chip	VIL_nRST			0.6	V		52
Operating frequency range		2412		2484	MHz	Wi-Fi; device should operate in regional allocated range (note 1)	53
TX power		12	13	14	dBm	11n, MCS7	53
TX power		18.5	19.5	20.5	dBm	11b mode	53
Sensitivity		-90	-89	-88	dBm	Basic Data Rate, @0.1% BER	54
Adjacent channel selectivity C/I	C/I			-6	dB	F = F0 + 1 MHz	54
Adjacent channel selectivity C/I	C/I			-25	dB	F = F0 + 2 MHz	54
Adjacent channel selectivity C/I	C/I			-33	dB	F = F0 -2 MHz	54
Adjacent channel selectivity C/I	C/I			-45	dB	F = F0 -3 MHz	54
Out-of-band blocking performance		-10			dBm	30 MHz ~ 2000 MHz (Basic Data Rate)	54
Out-of-band blocking performance		-27			dBm	2000 MHz ~ 2400 MHz (Basic Data Rate)	54
RF power control range		-12		9	dBm	Basic Data Rate	55
Δf1avg	Δf1avg			155	kHz	Basic Data Rate	55
Sensitivity		-90	-89	-88	dBm	π/4 DQPSK, @0.01% BER	55
Sensitivity		-84	-83	-82	dBm	8DPSK, @0.01% BER	55
Maximum received signal				-5	dBm	8DPSK, @0.01% BER	55
RF power control range		-12		9	dBm	Enhanced Data Rate	56
In-band spurious emissions				-53	dBm	F = F0 +/-> 3 MHz (Enhanced Data Rate)	56
Sensitivity		-94	-93	-92	dBm	Bluetooth LE, @30.8% PER	56
Out-of-band blocking performance		-10			dBm	30 MHz ~ 2000 MHz (Bluetooth LE)	56
Out-of-band blocking performance		-27			dBm	2000 MHz ~ 2400 MHz (Bluetooth LE)	56
Out-of-band blocking performance		-10			dBm	3000 MHz ~ 12.5 GHz (Bluetooth LE)	57
RF power control range		-12		9	dBm	Bluetooth LE	58
Δf1avg	Δf1avg			265	kHz	Bluetooth LE	58
ESD HBM (Human Body Model)		-2000		2000	V	JS-001	53
ESD CDM (Charge Device Model)		-500		500	V	JS-002	53
Latch-up current trigger		-200		200	mA	JESD78	53
Differential nonlinearity (DNL)	DNL	-7		7	LSB	RTC controller; ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi&Bluetooth off	43
Integral nonlinearity (INL)	INL	-12		12	LSB	RTC controller; ADC connected to an external 100 nF capacitor; DC signal input; ambient temperature at 25 °C; Wi-Fi&Bluetooth off	43
ADC total error		-23		23	mV	Atten = 0, effective measurement range of 100 ∼ 950 mV	44
ADC total error		-30		30	mV	Atten = 1, effective measurement range of 100 ∼ 1250 mV	44
ADC total error		-40		40	mV	Atten = 2, effective measurement range of 150 ∼ 1750 mV	44
ADC total error		-60		60	mV	Atten = 3, effective measurement range of 150 ∼ 2450 mV	44

CAD (KiCad official)

Symbol: ESP32-U4WDH
Footprint: Package_DFN_QFN:QFN-48-1EP_5x5mm_P0.35mm_EP3.7x3.7mm
3D model: QFN-48-EP(5x5) (KiCad packages3D, STEP)
3D model files: esp32-u4wdh-etched.step / esp32-u4wdh-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); esp32-u4wdh.step / esp32-u4wdh.glb are the bare package body.

Provenance

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

Datasheet: Espressif Systems datasheet (78 pp, sha256 a7917e6b47528c9d, retrieved 2026-10-22, tier: lcsc)
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