ESP32-PICO-D4

Part: ESP32-PICO-D4 — Espressif Inc.

Type: System-in-Package (SiP) Module

Description: System-in-Package (SiP) module based on ESP32, offering Wi-Fi (802.11 b/g/n) and Bluetooth V4.2 BR/EDR and LE, with integrated 4 MB SPI flash and 40 MHz crystal oscillator.

Operating Conditions:

• Supply voltage: 3.0 V ~ 3.6 V
• Operating temperature: -40 to 85 °C
• Minimum current delivered by power supply: 0.5 A

Absolute Maximum Ratings:

• Max supply voltage: 3.6 V
• Max cumulative IO output current: 1100 mA
• Max storage temperature: 150 °C

Key Specs:

• Pin capacitance: 2 pF (Typ)
• High-level input current: 50 nA (Max)
• Low-level input current: 50 nA (Max)
• High-level source current (VDD3P3_CPU/RTC power domain): 40 mA (Typ, VDD = 3.3 V, VOH >= 2.64 V)
• Low-level sink current: 28 mA (Typ, VDD = 3.3 V, VOL = 0.495 V)
• Resistance of internal pull-up resistor: 45 kΩ (Typ)
• Resistance of internal pull-down resistor: 45 kΩ (Typ)
• Wi-Fi operating frequency range: 2412–2484 MHz

Features:

• Integrated 4-MB SPI flash
• Integrated 40 MHz crystal oscillator
• Wi-Fi 802.11 b/g/n (up to 150 Mbps)
• Bluetooth V4.2 BR/EDR and Bluetooth LE specification
• Dual Xtensa® 32-bit LX6 microprocessors
• 520 KB on-chip SRAM, 448 KB ROM
• ADC, DAC, touch sensor, SD/SDIO/MMC Host Controller, SPI, SDIO/SPI Slave Controller, EMAC, motor PWM, LED PWM, UART, I2C, I2S, infrared remote controller, GPIO, pulse counter
• Hall sensor

Applications:

• Wearable electronics
• Medical equipment
• Sensors
• IoT products

Package:

• (7.000±0.100) mm × (7.000±0.100) mm × (0.940±0.100) mm

The ESP32-PICO-D4 module has 48 pins. See pin definitions in Table 2.

Table 2: Pin Description

Name	No.	Type	Function
VDDA	1	P	Analog power supply (2.3 V ~ 3.6 V)
LNA_IN	2	I/O	RF input and output
VDDA3P3	3	P	Analog power supply (2.3 V ~ 3.6 V)
VDDA3P3	4	P	Analog power supply (2.3 V ~ 3.6 V)
SENSOR_VP	5	I	GPIO36, ADC1_CH0, RTC_GPIO0
SENSOR_CAPP	6	I	GPIO37, ADC1_CH1, RTC_GPIO1
SENSOR_CAPN	7	I	GPIO38, ADC1_CH2, RTC_GPIO2
SENSOR_VN	8	I	GPIO39, ADC1_CH3, RTC_GPIO3

Table 2: Pin Description

Name	No.	Type	Function
EN	9	I	High: On; enables the module Low: Off; the module powers off Note: Do not leave this pin floating.
IO34	10	I	ADC1_CH6, RTC_GPIO4
IO35	11	I	ADC1_CH7, RTC_GPIO5
IO32	12	I/O	32K_XP (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9, RTC_GPIO9
IO33	13	I/O	32K_XN (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8, RTC_GPIO8
IO25	14	I/O	GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0
IO26	15	I/O	GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1
IO27	16	I/O	GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV
IO14	17	I/O	ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2
IO12	18	I/O	ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3
VDD3P3_RTC	19	P	Input power supply for RTC IO (3.0 V ~ 3.6 V)
IO13	20	I/O	ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER
IO15	21	I/O	ADC2_CH3, TOUCH3, RTC_GPIO13, MTDO, HSPICS0, HS2_CMD, SD_CMD, EMAC_RXD3
IO2	22	I/O	ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0, SD_DATA0
IO0	23	I/O	ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1, EMAC_TX_CLK
IO4	24	I/O	ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER
IO16	25	I/O	GPIO16, HS1_DATA4, U2RXD, EMAC_CLK_OUT
VDD_SDIO	26	P	Output power supply. See note 1 under the table.
IO17	27	I/O	GPIO17, HS1_DATA5, U2TXD, EMAC_CLK_OUT_180
SD2	28	I/O	GPIO9, SD_DATA2, SPIHD, HS1_DATA2, U1RXD
SD3	29	I/O	GPIO10, SD_DATA3, SPIWP, HS1_DATA3, U1TXD
CMD	30	I/O	GPIO11, SD_CMD, SPICS0, HS1_CMD, U1RTS
CLK	31	I/O	GPIO6, SD_CLK, SPICLK, HS1_CLK, U1CTS
SD0	32	I/O	GPIO7, SD_DATA0, SPIQ, HS1_DATA0, U2RTS
SD1	33	I/O	GPIO8, SD_DATA1, SPID, HS1_DATA1, U2CTS
IO5	34	I/O	GPIO5, VSPICS0, HS1_DATA6, EMAC_RX_CLK
IO18	35	I/O	GPIO18, VSPICLK, HS1_DATA7
IO23	36	I/O	GPIO23, VSPID, HS1_STROBE
VDD3P3_CPU	37	P	Input power supply for CPU IO (1.8 V ~ 3.6 V)
IO19	38	I/O	GPIO19, VSPIQ, U0CTS, EMAC_TXD0
IO22	39	I/O	GPIO22, VSPIWP, U0RTS, EMAC_TXD1
U0RXD	40	I/O	GPIO3, U0RXD, CLK_OUT2
Name	No.	Type	Function
U0TXD	41	I/O	GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2
IO21	42	I/O	GPIO21, VSPIHD, EMAC_TX_EN
VDDA	43	P	Analog power supply (2.3 V ~ 3.6 V)
XTAL_N_NC	44	-	NC
XTAL_P_NC	45	-	NC
VDDA	46	P	Analog power supply (2.3 V ~ 3.6 V)
CAP2_NC	47	-	NC
CAP1_NC	48	-	NC

Table 6: DC Characteristics (3.3 V, 25 °C)

Symbol	Parameter	Parameter	Min	Typ	Max	Unit
C IN	Pin capacitance	Pin capacitance	-	2	-	pF
V IH	High-level input voltage	High-level input voltage	0.75×VDD 1	-	VDD 1 +0.3	V
V IL	Low-level input voltage	Low-level input voltage	-0.3	-	0.25×VDD 1	V
I IH	High-level input current	High-level input current	-	-	50	nA
I IL	Low-level input current	Low-level input current	-	-	50	nA
V OH	High-level output voltage	High-level output voltage	0.8×VDD 1	-	-	V
V OL	Low-level output voltage	Low-level output voltage	-	-	0.1×VDD 1	V
I OH	High-level source current (VDD 1 = 3.3 V, V OH >= 2.64 V, output drive strength set to the maximum)	VDD3P3_CPU power domain 1 , 2	-	40	-	mA
I OH	High-level source current (VDD 1 = 3.3 V, V OH >= 2.64 V, output drive strength set to the maximum)	VDD3P3_RTC power domain 1 , 2	-	40	-	mA
I OH	High-level source current (VDD 1 = 3.3 V, V OH >= 2.64 V, output drive strength set to the maximum)	VDD_SDIO power domain 1 , 3	-	20	-	mA

Symbol	Parameter	Min	Typ	Max	Unit
I OL	Low-level sink current (VDD 1 = 3.3 V, V OL = 0.495 V, output drive strength set to the maximum)	-	28	-	mA
R PU	Resistance of internal pull-up resistor	-	45	-	k Ω
R PD	Resistance of internal pull-down resistor	-	45	-	k Ω
V IL _ nRST	Low-level input voltage of CHIP_PU to power off the chip	-	-	0.6	V

Stresses beyond the absolute maximum ratings listed in the table below may cause permanent damage to the device. These are stress ratings only, and do not refer to the functional operation of the device that should follow the recommended operating conditions.

Table 4: Absolute Maximum Ratings

Symbol	Parameter	Min	Max	Unit
VDD33	Power supply voltage	-0.3	3.6	V
I output 1	Cumulative IO output current	-	1100	mA
T store	Storage temperature	-40	150	°C

Table 5: Recommended Operating Conditions

Symbol	Parameter	Min	Typical	Max	Unit
VDD33	Power supply voltage	3	3.3	3.6	V
I VDD	Current delivered by external power supply	0.5	-	-	A
T	Operating temperature	-40	-	85	°C

Figure 7: ESP32-PICO-D4 Package

MPN	Package	Temperature Range	Packing
ESP32-PICO-D4	System-in-Package (SiP) module, 7.000x7.000x0.940 mm (nominal)	-40 °C ~ 85 °C	null