Quectel BC66-NA Manual page 33

Table 13: Pin Definition of USIM Interface
Pin Name Pin No.
SIM_VDD 14
SIM_CLK 13
SIM_DATA 11
SIM_RST 12
SIM_GND 10
A reference circuit design for USIM interface with a 6-pin USIM card connector is illustrated below.
Module
Figure 21: Reference Circuit for USIM Interface with a 6-pin USIM Card Connector
For more information
http://www.molex.com.
In order to enhance the reliability and availability of USIM card in application, please follow the criteria
below in USIM circuit design:

Keep the placement of USIM card connector as close as possible to the module. Keep the trace
length as less than 200mm as possible.

Keep USIM card signals away from RF and VBAT traces.

Assure the trace between the ground of module and that of USIM card connector is short and wide.
Keep the trace width of ground no less than 0.5mm to maintain the same electric potential. The
decouple capacitor between SIM_VDD and GND should be not more than 1μF and be placed close
to the USIM card connector.

To avoid cross talk between SIM_DATA and SIM_CLK, keep them away from each other and shield
them separately with surrounded ground.
BC66-NA_Hardware_Design
Description
Power supply for USIM card
Clock signal of USIM card
Data signal of USIM card
Reset signal of USIM card
Specified ground for USIM card
SIM_GND
SIM_VDD
SIM_RST
22R
SIM_CLK
22R
10K
22R
SIM_DATA
33pF33pF 33pF
of USIM card
Comment
Voltage accuracy: 1.8V± 5%.
Maximum supply current: about 60mA.
100nF
33pF
GND GND
connector, please visit
NB-IoT Module Series
BC66-NA Hardware Design
USIM Card Connector
VCC GND
RST VPP
CLK IO
TVS
http://www.amphenol.com or
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