LTE-A Module Series
EM160R-GL_Hardware_Design 60 / 73
5.3. Digital I/O Characteristics
Table 38: Logic Levels of 1.8 V Digital I/O
Table 39: Logic Levels of 3.3 V Digital I/O
Table 40: (U)SIM High/Low-voltage I/O Requirements
Parameter
Description
Min.
Max.
Unit
VDDIO_1V8
Supply voltage
1.7
1.94
V
V
IH
High-level input voltage
0.65 × VDDIO_1V8
VDDIO_1V8
+ 0.3
V
V
IL
Low-level input voltage
-0.3
0.35 × VDDIO_1V8
V
V
OH
High-level output voltage VDDIO_1V8
- 0.45
VDDIO_1V8
V
V
OL
Low-level output voltage
0
0.45
V
Parameter
Description
Min.
Max.
Unit
3.3 V
Supply voltage
3.135
3.465
V
V
IH
High-level input voltage
2.0
3.6
V
V
IL
Low-level input voltage
-0.5
0.8
V
Parameter
Description
Min.
Max.
Unit
V
IH
High-level input voltage
0.7 × USIM_VDD
US 0.3
V
V
IL
Low-level input voltage
-0.3
0.2 × USIM_VDD
V
V
OH
High-level output voltage 0.8 × USIM_VDD
-
V
V
OL
Low-level output voltage
-
0.4
V
