Power Interface; Overview; Power Supply Vbat Interface - Huawei ME909u-523 Hardware Manual

HUAWEI ME909u-523 LTE LGA Module
Hardware Guide

3.3 Power Interface

3.3.1 Overview

The power supply part of the ME909u-523 module contains:



Table 3-2 lists the definitions of the pins on the power supply interface.
Table 3-2 Definitions of the pins on the power supply interface
PIN No.
12, 13
48, 50, 52, 54, 56,
58–59, 106, 108,
110, 112, 114, 116
32
34
121–145

3.3.2 Power Supply VBAT Interface

When the ME909u-523 module works normally, power is supplied through the VBAT
pins and the voltage ranges from 3.3 V to 4.2 V (typical value: 3.8 V). The 145-pin
LGA provides 2 VBAT pins and 38 GND pins for external power input. To ensure that
the ME909u-523 module works normally, all the pins must be used efficiently.
Issue 01 (2014-05-24)
I indicates pins for digital signal input; O indicates pins for digital signal output; PI indicates

power input pins; PO indicates power output pins; G indicates ground pins.
indicates Low-level Input voltage;

V
IL
Low-level Output voltage;
 The NC (Not Connected) pins are floating and there are no signal connected to these pins.
B pins indicate blankness. Please do not design PAD on main board. Please refer to section

3.12 for details.
 The Reserved pins are internally connected to the module. Therefore, these pins should not
be used, otherwise they may cause problems. Please contact with us for more details about
this information.
VBAT pins for the power supply
VCC_EXT1 pin for external power output with 1.8 V
SIM_VCC pin for USIM card power output
Pin Name Pad
Type
PI
VBAT
GND G
PO
VCC_EXT1
PO
SIM_VCC
GND G
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Description of the Application Interfaces
indicates High-level Input voltage;
V
IH
indicates High-level Output voltage.
V
OH
Description
Pins for power
voltage input
Ground
Pin for external power
output
Power supply for
USIM card
Thermal Ground Pad
indicates
V
OL
Min. (V) Typ. (V)
3.3 3.8
- -
- 1.8
- 1.8/2.85
- -
Max. (V)
4.2
-
-
-
-
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