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Chengdu Ebyte Electronic Technology Co., Ltd E78-400M22S1A User Manual
Copyright ©2012–2019
，
Chengdu Ebyte Electronic Technology Co.,Ltd.
2
1.
General introduction
E78 series are RF transceiver module of various frequency bands designed
and manufactured by Chengdu Ebyte, with long communication distance and
extremely low power mode current consumption. It is a small-sized SMD type (pin
pitch 1.1mm).
E78-400M22S1A adopts ASR6505 chip from ASR Company. This chip is an
ultra-low-power LoRa integrated single-chip SoC. It uses Semtech advanced
low-power LoRa Transceiver SX1262 and integrates a STM8L152 low-power MCU,
Flash capacity 64kB, SRAM Capacity 4kB, EEPROM capacity 2K, small-sized, ultra-low power consumption, for
LoRaWAN, LinkWAN multiple protocol standards, applicable for a variety of IoT application scenarios, is currently the
best choice for LPWAN applications.
It is a hardware platform, cannot be used independently. Users need to conduct secondary development. (We can
customize standard LoRaWan, Ali linkWan nodes).
1.1 Main parameter
Model
No. Frequency
Transmit
power
Reference distance(stamp
hole/IPEX)
Package Antenna
E78-400M22S1A 410-490MHz 21dBm 5.5km(Lora 1kbps) SMD Stamp hole/IPEX
Model
No.
Core IC Size Net weight
working
temperatu
re
Working
humidity
Storage
temperatu
re
E78-400M22S1A ASR6505
26* 16*2.8 mm
1.9g -40 ~ 85
℃
10% ~ 90% -40 ~ 125°C
Parameter category Min
Typ Max Unit
Transmit
current(LoRa@2.4kb
ps) 100
110 120 mA
Receiving
current(LoRa@2.4kb
ps)
13 14 15 mA
Shutdown current 1.6
2 2.6 uA
Transmit power 20.6
20.8 21 dBm
Receiving
sensitivity -139
-140 -140 dBm
TCXO crystal 32
32 32 MHz