U)Sim Interface - Quectel EC2 Series Design Manualline

3.8. (U)SIM Interface


The total length of each (U)SIM signal trace should be less than 200 mm.

Isolate USIM_CLK and USIM_DAT with ground plane to avoid the interference between each other.

The peripheral components such as TVS, capacitors and resistors should be put near the (U)SIM
card connector.
Figure 26: Overview of (U)SIM Signal Traces (EVB 1st Layer)
GND
GND
Figure 27: Overview of (U)SIM Signal Traces (EVB 2nd Layer)
EC2x&EG2x-G_Series_PCB_Design_Guideline
GND
GND
GND
GND
(U)SIM card connector
(U)SIM card connector
GND
GND
USIM_RST
USIM_VDD
USIM_PRESENCE
EC2x&EG2x-G Series PCB Design Guideline
(U)SIM
(U)SIM
interface
interface
TVS & Capacitors &
TVS & Capacitors &
GND
GND
USIM_CLK
GND
LTE Standard Module Series
GND
GND
Resistors
Resistors
GND
USIM_DATA
GND
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