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L810-MiniPCIeHardware User Manual
Page 18 of 26
5.2.2 USIM Interface Application Description
Recommended circuit diagram for USIM is shown in Figure 5-2:
Figure 5-2 Recommended USIM Circuit Diagram
Note:
In order to improve the EMC performance, the SIM card slot should be placed close to the
module. The filter capacitors on the signal lines should be placed close to SIM card pins. The
ESD device (e.g. TVS diodes) shall be added close to the SIM card pins for ESD protection. The
capacitance for ESD devices should be lower than 33pF.
