U)Sim2 Card Compatible Design - Quectel RM520N-GL Hardware Design

Module
USIM_VDD
USIM_RST
USIM_CLK
USIM_DET
USIM_DATA
NOTE: All these resistors, capacitors and TVS should be close to (U)SIM card connector in PCB layout.
Figure 17: Reference Circuit for a 6-Pin (U)SIM Card Connector

4.1.6. (U)SIM2 Card Compatible Design

It should be noted that when the (U)SIM2 interface is used for an external (U)SIM card, the circuits are the
same as those of (U)SIM1 interface. When the (U)SIM2 interface is used for the optional internal eSIM
card, pins 40, 42, 44, 46 and 48 of the modules must be kept open.
A recommended compatible design for the (U)SIM2 interface is shown below.
M.2 Socket Connector
USIM2_VDD
USIM2_RST
USIM2_CLK
USIM2_DET
USIM2_DATA
GND
eSIM
NOTE:
The five 0 Ω resistors must be placed close to the module, and all other components should be placed close to
(U)SIM card connector in PCB layout.
Figure 18: Recommended Compatible Design for (U)SIM2 Interface
RM520N-GL_Hardware_Design
USIM_VDD
10-20k
22 Ω
22 Ω
22 Ω
GND
10 pF
USIM2_VDD
0 Ω
48
0 Ω 22 Ω
46
0 Ω 22 Ω
44
0 Ω
40
0 Ω 22 Ω
42
100 nF
TVS array
10 pF 10 pF
100 nF
10-20K
10pF 10pF 10pF
5G Module Series
(U)SIM Card
Connector
VCC
RST
CLK
IO
GND
(U)SIM Card
Connector
VCC
RST
CLK
CD
IO
TVS array
GND
VPP
VPP
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