Datasheet

4 Electrical Characteristics
Table 7 – cont’d from previous page
Symbol Parameter Min Typ Max Unit
V
IH_nRST
Chip reset release voltage 0.75 × VDD
1
— VDD
1
+ 0.3 V
V
IL_nRST
Chip reset voltage –0.3 — 0.25 × VDD
1
V
1
VDD is the I/O voltage for a particular power domain of pins.
2
V
OH
and V
OL
are measured using high-impedance load.
4.4 Current Consumption Characteristics
With the use of advanced power-management technologies, the module can switch between different power
modes. For details on different power modes, please refer to Section Low Power Management
in ESP32-C3 Family Datasheet .
Table 8: Current Consumption Depending on RF Modes
Work mode Description Peak (mA)
Active (RF working)
TX
802.11b, 1 Mbps, @20.5 dBm 345
802.11g, 54 Mbps, @18 dBm 285
802.11n, HT20, MCS 7, @17.5 dBm 280
802.11n, HT40, MCS 7, @17 dBm 280
RX
802.11b/g/n, HT20 82
802.11n, HT40 84
1
The current consumption measurements are taken with a 3.3 V supply at 25 °C of ambient
temperature at the RF port. All transmitters’ measurements are based on a 100% duty cycle.
2
The current consumption figures for in RX mode are for cases when the peripherals are dis-
abled and the CPU idle.
Table 9: Current Consumption Depending on Work Modes
Work mode Description Typ Unit
Modem-sleep
1, 2
The CPU is
powered on
3
160 MHz 20 mA
80 MHz 15 mA
Light-sleep — 130 µA
Deep-sleep RTC timer + RTC memory 5 µA
Power off CHIP_PU is set to low level, the chip is powered off 1 µA
1
The current consumption figures in Modem-sleep mode are for cases where the CPU is powered on and
the cache idle.
2
When Wi-Fi is enabled, the chip may switch between Active and Modem-sleep modes. Therefore, current
consumption changes accordingly.
3
In practice, software can adjust CPU’s frequency according to CPU load to reduce current consumption.
Espressif Systems 15
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ESP32-C3-WROOM-02 & WROOM-02U Datasheet v0.7