Huawei MU609 - VCC_EXT Interface Compatibility Design

HUAWEI 30 mm × 30 mm LGA Module
Hardware Migration Guide
LGA Interface Differences
Issue 08 (2016-12-12)
HUAWEI Proprietary and Confidential
Copyright © HUAWEI Technologies Co., Ltd.
37

ME209u-526/ME909u-523/MU709/ME909s/MU509-65 module need to be
compatible. We recommend the RF interface design follow the design of
ME209u-526/ME909u-523/MU709/ME909s/MU509-65.
Top view of LGA and main board
Layer 01
Layer 02
Layer 03
A = RF pad length + 50 mils
B = RF pad width + 40 mils
RF pad reference
ground
Ground hole
Surface trace in
PCB layout design
Small Pad
design
No GND Pad

We recommend the RF interface design for different modules can accord to their own
reference design.

We recommend digging the adjacent layer below the RF pad for better RF trace impedance
control.

The pin 111 and pin 115 signal trace layout can be the same as pin 107 (MAIN_ANT).
2.6 VCC_EXT Interface Compatibility Design
Because the signal level of MC509 and MU509 is different from MU609, MU709,
ME209u-526, ME909u and ME909s, there are two output supplies as for reference
level. One is VCC_EXT2 (2.6 V), the other is VCC_EXT1 (1.8 V).
Table 2-13 Differences of the VCC_EXT interface
Pin
No.
Interface
Name
MU509
MC509
MU609
ME209u
-526
ME909u
MU709
ME909
s
31
VCC_EXT
VCC_EXT2
2.6 V
2.6 V
N
N
N
N
N
32
VCC_EXT1
1.8 V
1.8 V
1.8 V
1.8 V
1.8 V
1.8 V
1.8 V