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ESP32-U4WDH

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Espressif Systems RF Transceiver ICs, QFN-48-EP(5x5). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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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