LoRa2021F33-2G4: 2W High-Power, High-Speed Multi-Band LR2021 Wireless Communication Module

LoRa2021F33-2G4: 2W High-Power, High-Speed Multi-Band LR2021 Wireless Communication Module

The LoRa2021F3-2G4 is a transceiver module based on SEMTECH's LR2021 chip, which integrates the 4th-generation LoRa IP core and supports operation in the Sub-GHz and 1.9-2.5GHz ISM bands, the L-band, and licensed S-band frequencies, making it suitable for both terrestrial and satellite communication (SATCOM) networks.

In addition, the Lora2021F33-2G4 features extended physical-layer modulation capabilities to support Fast Long-Range Communication (FLRC). When integrated with third-party protocol stacks, it is compatible with a wide range of low-power wireless protocols, including Amazon Sidewalk, Wireless M-BUS, Wi-SUN FSK, and Z-Wave. The LoRa2021F33-2G4 is manufactured and tested using strictly lead-free processes and is fully compliant with RoHS and REACH standards.

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Parameters	Test condition	Min.	Typ.	Max	Unit
Voltage Range		3.0	5	5.5	V
Operating Temperature		-40	25	85	℃
Maximum Input Signal			10		dBm
Current Consumption
Transmit Current	@433MHz, 5V, 2W		< 1200		mA
	@868/915MHz,5V,1W		< 800		mA
	@2.4GHz,5V, 1W TxPower=5		< 900		mA
Receive Current	@Sub-GHz		< 8		mA
	@2.4G bypass ON		< 9		mA
	@2.4G bypass OFF		<42		mA
Sleep Current	@3.3V		<20		uA
RF Parameters
Frequency Range	@433MHz	410		450	MHz
	@470MHz	470		510	MHz
	@868MHz	800		880	MHz
	@915MHz	890		950	MHz
Transmit Power Adjustable Range	@Sub-GHz@433MHz	18		31	dBm
	@Sub-GHz@868MHz	10		31	dBm
	@Sub-GHz@915MHz	8		30	dBm
	@1.9-2.5GHz	11		30	dBm
Transmit Power Output	@433/470MHz	31.5	33	34	dBm
	@868/915MHz	28.5	30	31	dBm
	@1.9-2.5GHz	28.5	30	31	dBm
Receive Sensitivity	BW=62.5KHz,SF=12 @Sub-GHz		-143		dBm
	BW=125KHz,SF=10 @Sub-GHz		-136		dBm
	BW=125KHz,SF=10 @2.4GHz, Bypass ON		-124		dBm
	BW=125KHz,SF=10 @2.4GHz, Bypass OFF		-136		dBm
Frequency Error			0.5		ppm
Modulation Rate (@Sub-GHz)	@LoRa	0.0458		125	Kbps
Modulation Rate (@Sub-GHz)	@FSK	0.2		2000	Kbps
Modulation Rate (@2.4GHz)	@LoRa	0.476		101.5	Kbps

Note: For 2.4G LNA (DIO5), set to high level normally (Bypass off). Setting it to low level will reduce sensitivity by 12 dB (Bypass on).

Features

Sub-GHz Bands: 433/470MHz 2W
Sub-GHz Bands: 868/915MHz 1W
(Customizable range: 150~960 MHz)
1.9-2.5GHz band: 1W
1.9-2.5GHz sensitivity: up to-136dBm
@ BW=125KHz, SF=10
Sub-GHz sensitivity: up to -144dBm
@BW=62.5 KHz, SF=12
Built-in electrostatic protection circuit
Supports LR-FHSS
FLRC: modulation rate up to 2.6 Mbps
LoRa: modulation rate up to 125 kbps
4th Generation LoRa IP technology
Simultaneous reception with multiple Spreading Factors (SF)
Enhanced CAD (Channel Activity Detection)
Higher frequency offset tolerance (for harsh RF environments):
Supports multiple communication protocols:
LoRa / LoRaWAN® (Sub-GHz + 2.4GHz)
Bluetooth® LE 5.0
IEEE® 802.15.4 (Thread®/Zigbee™)
Wi-SUN, Wireless M-BUS, Z-Wave, etc.
Transmission distance: >10km at Sub-GHz in open area
Sleep current < 20µA
Small size, stamp hole design

Applications

Drones/UAV Applications
Smart home/Smart agriculture
Remote irrigation
Industrial manufacturing

SPI wiring diagram for LoRa2021F33-2G4 module showing host MCU connections (SCK, NSS, BUSY, MOSI, MISO, RST, IRQ, CE) and power/GND.

LoRa2021F33-2G4 module top and bottom views, showing metal shield, antenna ports, and pin labels (SPI, RESET, IRQ, VCC, GND).

Pin NO.	Pin name	I/O	IO Voltage	Description
1	VCC			Connect to the positive power supply.
2,3,4,6, 7,8,11	GND			Connect to the negative power supply.
5	CE	I	0-5.5V	Internal LDO Enable Control Pin: Operation: Drive high or leave floating (internal pull-up ensures high). Sleep Mode: Connect to ground.
9	ANT			Sub-GHz Antenna Port, External 50Ω Antenna
10	ANT-2G4			2.4 GHz Antenna Port, External 50Ω Antenna
12	SCK	I	0-3.3V	SPI clock input
13	NSS	I	0-3.3V	SPI chip select input
14	BUSY	O	0-3.3V	Used for status indication, refer to the chip datasheet for details.
15	ANTA MOSI	I	0-3.3V	SPI data input
16	MISO	O	0-3.3V	SPI data output
17	RESET	I	0-3.3V	Reset trigger input, refer to the chip datasheet for details.
18	IRQ	O	0-3.3V	Multipurpose digital interface, refer to the chip datasheet for details.

LoRa2021F33-2G4 mechanical dimensions drawing (39.0 × 21.0 × 3.3 mm) with pad spacing and side profile measurements.

LoRa2021F33-2G4: 2W High-Power, High-Speed Multi-Band LR2021 Wireless Communication Module

Features

Applications

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