Recommended Sim Card Holder - SimCom SIM7020C Hardware Design

MODULE
Note: SIM_DATA has been pulled up with a 10KΩ resistor to SIM_VDD in module. A 100nF
capacitor on SIM_VDD is used to reduce interference. For more details of AT commands about
SIM, please refer to document [1].SIM_CLK is very important signal, the rise time and fall time of
SIM_CLK should be less than 40ns, otherwise the SIM card might not be initialized correctly. If
SIM_DET is used, a 10KΩ resistor is necessary to pulling up to the power VDD_EXT.
3.7.2

Recommended SIM Card Holder

It is recommended to use the 6-pin SIM socket such as C707 10M006 512 produced by Amphenol.
User can visit http://www.amphenol.com for more information about the holder.
SIM7020_Hardware_Design_V1.02
SIM_ DET
SIM _ VDD
SIM_ RST
SIM _ CLK
SIM _ DATA
22pF 22pF 22pF
Figure 17: SIM interface reference circuit
Figure 18: Amphenol SIM card socket
25
Smart Machine Smart Decision
100nF
SIM Socket
VCC GND
22 Ω
RST VPP
22 Ω
CLK I /O
C 707 10 M 006 512
22 Ω
TVS
2018-07-25