Smart Machine Smart Decision
SIM7000 _Hardware Design _V1.00
2017-05-23
3.5 SIM Interface
SIM7000 supports both 1.8V and 3.0V SIM Cards.
Table 11: SIM electronic characteristic in 1.8V mode (SIM_VDD=1.8V)
Symbol
Parameter
Min.
Typ.
Max.
Unit
SIM_V
DD
LDO power output voltage
1.75
1.8
1.95
V
V
IH
High-level input voltage
0.65*SIM_VDD
-
S0.3
V
V
IL
Low-level input voltage
-0.3
0
0.35*SIM_VDD
V
V
OH
High-level output voltage
SIM_VDD -0.45
-
SIM_VDD
V
V
OL
Low-level output voltage
0
0
0.45
V
Table 12: SIM electronic characteristic 3.0V mode (
SIM_VDD
=2.95V)
Symbol
Parameter
Min.
Typ.
Max.
Unit
SIM_V
DD
LDO power output voltage
2.75
2.95
3.05
V
V
IH
High-level input voltage
0.65*SIM_VDD
-
S0.3
V
V
IL
Low-level input voltage
-0.3
0
0.25*SIM_VDD
V
V
OH
High-level output voltage
SIM_VDD -0.45
-
SIM_VDD
V
V
OL
Low-level output voltage
0
0
0.45
V
3.5.1
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.
Figure 19: SIM interface reference circuit
