User's Manual

Smart Machine Smart Decision
SIM7020G_User Manual_V1.00 29 2019-01-15
but the USB charging function is not supported.
USB_ VBUS
USB_DM
USB_DP
GND
USB
USB
VBUS
D-
D+
GND
D2D1
0Ω
USB_ID
D3
MODULE HOST
Figure 18: USB reference circuit
Because of the high speed on USB bus, more attention should be paid to the influence of the junction
capacitance of the ESD component on USB data lines.
Table 13: Recommended TVS list
No.
Manufacturer
Part Number
Description
Package
1
ON Semi
ESD9L5.0ST5G
TVS 5V 0.5PF 150mW RO
SOD-923
2
TOSHIBA
DF2S6.8UFS
TVS 5V 2PF 150mW RO
SOD-923
3
ON Semi
ESD9L5.0ST5G
TVS 5V 0.5PF 150mW RO
SOD-923
4
TOSHIBA
DF2S6.8UFS
TVS 5V 2PF 150mW RO
SOD-923
3.7 SIM Interface
SIM7020G supports both 1.8V and 3.0V SIM Cards.
Table 14: SIM electronic characteristic in 1.8V mode (SIM_VDD=1.8V)
Symbol
Parameter
Min.
Typ.
Max.
Unit
SIM_VDD
LDO power output voltage
1.75
1.8
1.95
V
V
IH
High-level input voltage
0.65*SIM_VDD
-
SIM_VDD +0.3
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
Table 15: SIM electronic characteristic 3.0V mode (SIM_VDD=3V)