Quectel RM520N-GL - Digital I;O Characteristic

5G Module Series
RM520N-GL_Hardware_Design 70 / 84
6.3. Digital I/O Characteristic
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 1.8 V I/O Requirements
Parameter
Description
Min.
Max.
Unit
V
IH
Input high voltage
1.65
2.1
V
V
IL
Input low voltage
-0.3
0.54
V
V
OH
Output high voltage
1.3
1.8
V
V
OL
Output low voltage
0
0.4
V
Parameter
Description
Min.
Max.
Unit
3.3 V
Power Domain
3.135
3.464
V
V
IH
Input high voltage
2.0
3.6
V
V
IL
Input low voltage
-0.5
0.8
V
Parameter
Description
Min.
Max.
Unit
USIM_VDD
Power supply
1.65
1.95
V
V
IH
Input high voltage
0.7 × USIM_VDD
USIM_VDD + 0.3
V
V
IL
Input low voltage
-0.3
0.2 × USIM_VDD
V
V
OH
Output high voltage
0.8 × USIM_VDD
USIM_VDD
V
V
OL
Output low voltage
0
0.4
V