User's Manual

M590
GPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd
Figure 3-16
ESD protectors, such as ESD diodes (lower than 33 pF) or
signals, especially in automotive electronics or other applications with badly ESD.
replace ESD diodes with 27 pF to 33 pF grounding capacitors.
be close to SIM card.
If you use 6-pin SIM card sockets
, MCP
encapsulation.
Figure 3
20
20
20
SIM_DATA
SIM_CLK
SIM_RST
VSIM
GPRS
Module
GPRS Module Hardware User Guide
Copyright © Neoway Technology Co., Ltd
Reference design of SIM card interface
ESD protectors, such as ESD diodes (lower than 33 pF) or
ESD varistors, are recommended on the SIM
signals, especially in automotive electronics or other applications with badly ESD.
In other applications,
replace ESD diodes with 27 pF to 33 pF grounding capacitors.
The ESD diodes or small capacitors should
, MCP
-C713(H2.8) is recommended. Figure 3-17
shows its
Figure 3
-17 Reference of SIM card socket
1 uF
CLK
RST
VCC
GND
SIM卡
DATA
17
ESD varistors, are recommended on the SIM
In other applications,
The ESD diodes or small capacitors should
shows its
VPP
GND
DATA