Sim Interface; Sim Application Guide - SimCom SIM7020C Hardware Design

1 ON Semi
2 TOSHIBA
3 ON Semi
4 TOSHIBA
3.7

SIM Interface

SIM7020 supports both 1.8V and 3.0V SIM Cards.
Table 12: SIM electronic characteristic in 1.8V mode (SIM_VDD=1.8V)
Symbol Parameter
SIM_V
LDO power output voltage
DD
V High-level input voltage
IH
V Low-level input voltage
IL
V High-level output voltage
OH
V Low-level output voltage
OL
Table 13: SIM electronic characteristic 3.0V mode (SIM_VDD=3V)
Symbol Parameter
SIM_V
LDO power output voltage
DD
V High-level input voltage
IH
V Low-level input voltage
IL
V High-level output voltage
OH
V Low-level output voltage
OL
3.7.1

SIM Application Guide

It is recommended to use an ESD protection component such as ESDA6V1W5 produced by ST
(www.st.com ) or SMF15C produced by ON SEMI (www.onsemi.com ). Note that the SIM
peripheral circuit should be close to the SIM card socket. The following figure shows the 6-pin
SIM card holder reference circuit.
SIM7020_Hardware_Design_V1.02
ESD9L5.0ST5G TVS 5V 0.5PF 150mW RO
DF2S6.8UFS TVS 5V 2PF 150mW RO
ESD9L5.0ST5G TVS 5V 0.5PF 150mW RO
DF2S6.8UFS TVS 5V 2PF 150mW RO
Min.
1.75
0.65*SIM_VDD
-0.3
SIM_VDD -0.45
0
Min.
2.75
0.65*SIM_VDD
-0.3
SIM_VDD -0.45
0
24
Smart Machine Smart Decision
SOD-923
SOD-923
SOD-923
SOD-923
Typ. Max.
1.8 1.95
- SIM_VDD +0.3
0 0.25*SIM_VDD
- SIM_VDD
0 0.45
Typ. Max.
3 3.05
- SIM_VDD +0.3
0 0.25*SIM_VDD
- SIM_VDD
0 0.45
2018-07-25
Unit
V
V
V
V
V
Unit
V
V
V
V
V