Quectel RM510Q-GL - (U)SIM Design Notices

5G Module Series
RM510Q-GL Hardware Design
RM510Q-GL_Hardware_Design 39 / 88
Module (U)SIM Card
Connector
USIM_DET
USIM_DATA
USIM_CLK
RST
CLK
CD1
IO
USIM_VDD
USIM_VDD
USIM_RST
VCC
GND
VPP
GND
TVS
22 Ω
22 Ω
22 Ω
10k-20k
100 nF
33 pF 33 pF 33 pF
CD2
1.8 V
4.7k
Note: All these resistors, capacitors and TVS should be close to (U)SIM card connector in PCB layout.
33k
Figure 16: Reference Circuit for Normally Open (U)SIM Card Connector
4.1.5. Without Hot-plug (U)SIM Card Connector
If (U)SIM card detection function is not needed, please keep USIM_DET disconnected. A reference circuit
for (U)SIM card interface with a 6-pin (U)SIM card connector is illustrated by the following figure.
Module (U)SIM Card
Connector
USIM_DET
USIM_DATA
USIM_CLK
RST
CLK
IO
USIM_VDD
USIM_VDD
USIM_RST
VCC
GND
VPP
GND
TVS
22 Ω
22 Ω
22 Ω
10k-20k
100 nF
33 pF 33 pF 33 pF
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)SIM Design Notices
To enhance the reliability and availability of the (U)SIM card in applications, please follow the criteria
below in (U)SIM circuit design.
⚫ Place the (U)SIM card connector as close to the module as possible. Keep the trace length less than
200 mm.