Huawei ME936 Hardware Manual page 19

HUAWEI ME936 LTE M.2 Module
Hardware Guide
unmatched antenna). In this case, the power pin voltage will drop. Make sure that the
voltage does not drop below 3.135 V in any case.
The traces of the power supply should be as short and wide as possible. It is
recommended that at least a 220 µF capacitance is added onto the 3.3 V power rails
and as close to the M.2 connector as possible. Customer can reduce the capacitance
if it can be guaranteed that 3.3V pin does not drop below 3.135 V in any case.
Figure 3-2 shows the recommended power circuit of the ME936 module.
Figure 3-2 Recommended power circuit of the ME936 module
ME936
3.3V pin must never be under 3.135 V during the 2G transmitting burst, as shown in Figure 3-
3 .
Issue 03 (2017-12-11)
3.3V
100nF
330pF
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Description of the Application Interfaces
1µF 22µF
3.3V
220µF
19