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HUAWEI ME909 Series Mini PCIe Module
Hardware Guide
Electrical and Reliability Features
Issue 0.1 (2013-06-09)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
36
Parameter
Description
Minimum Value
Maximum Value
Unit
V
IL
Logic low-level
input voltage
–0.3
0.35 x V
DD_PX
V
V
OH
Logic high-level
output voltage
V
DD_PX
–0.45
V
DD_PX
V
V
OL
Logic low-level
output voltage
0
0.45
V
5.6 Power Supply Features
5.6.1 Input Power Supply
Table 5-5 lists the requirements for input power of the ME909 module.
Table 5-5 Requirements for input power for the ME909 module
Parameter
Min.
Typ.
Max.
Ripple
Unit
VCC_3V3
3.0
3.3
3.6
0.05
V
Figure 5-1 Power Supply During Burst Emission
The VCC_3V3 minimum value must be guaranteed during the burst (with 2.7 A Peak in GSM 2
slot mode). So A low-dropout (LDO) regulator or switch power with current output of more than
3.5 A is strongly recommended for external power supply.
Table 5-6 Requirements for input current of the ME909 module
Power
Module
Peak (GSM 2
slot)
Normal
(WCDMA)
Normal (LTE
23dbm)
VCC_3V3
ME909
2750 mA
1100mA
1200 mA