Digital I/O Characteristic; Esd Protection - Quectel RG255C-GL Hardware Design

6.2. Digital I/O Characteristic

The following table shows the I/O requirements of RG255C-GL Mini PCIe.
Table 23: I/O Requirements
Parameter Description
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 24: (U)SIM High/Low-voltage I/O Requirements (Unit: V)
Parameter
V
IH
V
IL
V
OH
V
OL
NOTE
S
1. The PCM* and I2C interfaces are 1.8 V power domain.
2. The maximum voltage value of V

6.3. ESD Protection

Static electricity occurs naturally and it may damage the module. Therefore, applying proper ESD
countermeasures and handling methods is imperative. For example, wear anti-static gloves during the
development, production, assembly and testing of the module; add ESD protection components to the
ESD sensitive interfaces and points in the product design.
RG255C-GL_Mini_PCIe_Hardware_Design
Min.
0.7 × VCC_3V3
-0.3
VCC_3V3 - 0.5
0
Description
High-level input voltage
Low-level input voltage
High-level output voltage
Low-level output voltage
for PERST# and W_DISABLE# is 0.5 V.
IL
Max.
VCC_3V3 + 0.3
0.3 × VCC_3V3
VCC_3V3
0.4
Min.
0.7 × USIM_VDD
-0.3
0.8 × USIM_VDD
-
5G Module Series
Unit
V
V
V
V
Max.
USIM_VDD + 0.3
0.2 × USIM_VDD
-
0.4
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