Installation Instructions

AI-NB25
NB-IoT Module
Sichuan AI-Link Technology Co.,Ltd. page 7 of 20
35
RESERVED
Reserved
36
GND
Ground
37
VSIM
O
Power supply voltage for external SIM card
38
SIM_RST
O
Reset external SIM card
39
SIM_DIO
I/O
External SIM card data
40
SIM_CLK
O
External SIM card clock
41
SIM_GND
Ground for External SIM card
42
GND
Ground
43
RESERVED
Reserved
44
RESERVED
Reserved
45
RESERVED
Reserved
46
GND
Ground
47
RESERVED
Reserved
48
RESERVED
Reserved
49
RESERVED
Reserved
50
RESERVED
Reserved
51
RESERVED
Reserved
52
GND
Ground
53
RESERVED
Reserved
54
RESERVED
Reserved
3. Antenna Interface
The pin 2 is the RF antenna pad. The RF interface has an impedance of 50Ω.
3.1 Pin Definition of the RF_ANT
Pin Definition of the RF_ANT table
Name
Pin
Description
GND
1
Ground
RF_ANT
2
RF antenna pad
GND
3
Ground
3.2 RF Reference Design
A reference design for RF is shown as below