Quectel EG91-NAXD - Page 26

LTE Standard Module Series
EG91 Series Hardware Design
EG91_Series_Hardware_Design 25 / 106
Vnorm=5.0V open.
USB_DP 9 IO
USB differential
data bus (+)
USB 2.0 compliant
Require differential
impedance of 90Ω.
USB_DM 10 IO
USB differential
data bus (-)
USB 2.0 compliant
Require differential
impedance of 90Ω.
(U)SIM Interfaces
Pin Name Pin No. I/O Description DC Characteristics Comment
USIM_GND 47
Specified ground
for (U)SIM card
Connect to ground of
(U)SIM card
connector.
USIM1_VDD 43 PO
Power supply for
(U)SIM card
I
O
max=50mA
For 1.8V (U)SIM:
Vmax=1.9V
Vmin=1.7V
For 3.0V (U)SIM:
Vmax=3.05V
Vmin=2.7V
Either 1.8V or 3.0V is
supported by the
module automatically.
USIM1_DATA 45 IO
Data signal of
(U)SIM card
For 1.8V (U)SIM:
V
IL
max=0.6V
V
IH
min=1.2V
V
OL
max=0.45V
V
OH
min=1.35V
For 3.0V (U)SIM:
V
IL
max=1.0V
V
IH
min=1.95V
V
OL
max=0.45V
V
OH
min=2.55V
USIM1_CLK 46 DO
Clock signal of
(U)SIM card
For 1.8V (U)SIM:
V
OL
max=0.45V
V
OH
min=1.35V
For 3.0V (U)SIM:
V
OL
max=0.45V
V
OH
min=2.55V