SX127X RF Module
User Manual of E19 Series Modules
Copyright ©2012–2018，Chengdu Ebyte Electronic Technology Co.,Ltd
4
1.2.3 Turn-off current
Model No.
Min
Typ
Max
Unit
Remark
E19 (433M20SC)
0.5
1.0
2.5
µA
●
The turn-off current means the current consumed when
CPU, RAM, Clock and some registers remain operating while
SoC is at very low power consumption status.
● The turn-off current is always lower than the current
consumed when the power supply source of the whole
module is at no-load status.
E19 (433M20S2)
0.5
1.0
2.5
µA
E19 (433M30S)
1.5
3.0
4.5
µA
E19 (868M20S)
0.5
1.0
2.5
µA
E19 (868M30S)
1.5
3.0
4.5
µA
E19 (915M20S)
0.5
1.0
2.5
µA
E19 (915M30S)
1.5
3.0
4.5
µA
1.2.4 Supply voltage
Model No.
Min
Typ
Max
Unit
Remark
E19 (433M20SC)
1.8
3.3
3.6
V DC
●
If the voltage is at maximum value for long time, the
module may be damaged;
● The power supply pin has certain surge-resistance ability,
but the potential pulse higher than the maximum power
supply voltage;
● The power supply voltage is recommended to be higher
than 3.0V, if the voltage is lower than 3.0V, the RF
parameters will be affected at different degrees.
E19 (433M20S2)
1.8
3.3
3.6
V DC
E19 (433M30S)
3.3
5.0
5.5
V DC
E19 (868M20S)
1.8
3.3
3.6
V DC
E19 (868M30S)
3.3
5.0
5.5
V DC
E19 (915M20S)
1.8
3.3
3.6
V DC
E19 (915M30S)
3.3
5.0
5.5
V DC
1.2.5 Communication level
Model No.
Min
Typ
Max
Unit
Remark
E19 (433M20SC)
1.8
3.3
3.6
V DC
● If the communication level is higher than the allowed
maximum value, the module may be damaged;
● Although the communication level can be switched with
various methods, the power consumption of the whole
module will be affected at great degree.
E19 (433M20S2)
1.8
3.3
3.6
V DC
E19 (433M30S)
3.3
5.0
5.5
V DC
E19 (868M20S)
1.8
3.3
3.6
V DC
E19 (868M30S)
3.3
5.0
5.5
V DC
E19 (915M20S)
1.8
3.3
3.6
V DC
E19 (915M30S)
3.3
5.0
5.5
V DC
1.3 RF parameters
1.3.1 Transmitting Power
Model No.
Min
Typ
Max
Unit
Remark
E19 (433M20SC)
19
20
20.5
dBm
●
Due to the error of the materials, each LRC component
has ±0.1% error, so error accumulation will occur since
multiple LRC components are used in the whole RF circuit,
and the transmitting currents will be different;
● The power consumption can be lowered by lowering
the transmitting power, but the efficiency of the internal PA
will be decreased by lowering transmitting power due to
various reasons;
● The transmitting power will be lowered by lowering the
power supply voltage.
E19 (433M20S2)
19
20
20.7
dBm
E19 (433M30S)
28.5
30
30
dBm
E19 (868M20S)
19
20
20.4
dBm
E19 (868M30S)
28.5
30
30
dBm
E19 (915M20S)
19
20
20.6
dBm
E19 (915M30S)
28.5
30
30
dBm
