Main Parameters	Performance		Remarks
Main Parameters	Min.	Max	Remarks
Power supply（V）	0	5.5	Voltage over 5.5V will cause permanentdamage to module
Blocking power（dBm）	-	10	Chances of burn is slim when modules areused in short distance
Operating temperature（℃）	-40	85	/

Operating parameter

Main Parameters	Performance			Remarks
Main Parameters	Min.	Typ.	Max.	Remarks
Operating voltage（V）	3.3	5.0	5.5	≥5.0 V ensures output powerr
Communication level（V）		3.3		For 5V TTL, it may be at risk of burningdown
Operating temperature（℃）	-40	-	85	Industrial design
Operating frequency（MHz）	410.125	-	493.125	Support ISM band
TX Current(mA)		610		Instant power consumption
RX current（mA）		17
Sleep current（μA）		2		Software is shut down
Max Tx power（dBm）	29.5	30.0	30.5
Receiving sensitivity（dBm）	-146	-147	-148	Air data rate is 2.4kbps
Air data rate（bps）	0.3k	2.4k	62.5k	Controlled via user’s programming

Main parameter	Description	Remarks
Distance for reference	8km	Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 2.4kbps
TX length	240 Byte	Can be configured via command as 32/64/128/240 bytesper packet to transmit
Buffer	1000 Byte
Modulation	LoRa
Communication interface	UART
Package	DIP
Connector	172.54mm
Size	24*43mm
Antenna	SMA-K	50 ohm impedance

CH-E22-400T30D尺寸

No.	Name	Direction	Function
1	M0	Input（weak pull-up）	Work with M1 to decide 4 working modes of module (not suspended, if notused, could be grounded).
2	M1	Input（weak pull-up）	Work with M0 to decide 4 working modes of module (not suspended, if notused, could be grounded).
3	RXD	Input	TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can beconfigured as open-drain or pull-up input. Ground
4	TXD	Output	TTL UART outputs, connects to external RXD (MCU, PC) input pin. Can beconfigured as open-drain or push-pull output
5	AUX	Output	To indicate module ’s working status & wakes up the external MCU. During theprocedure of self-check initialization, the pin outputs low level. Can beconfigured as push-pull output (can be suspended).
6	VCC	Input	Power supply ：3.3~ 5.5V DC
7	GND	Input	Ground
8~11	Fixed hole	-	Fixed hole

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