Installation Instructions

AI-NB25
NB-IoT Module
Sichuan AI-Link Technology Co.,Ltd. page 5 of 20
1.2 Main functions of products
◆ It supports NB-IoT B1\B2\B4\B3\B5\B8\B12\B66\B71\B85 band, provides digital transmission services,
and supports 3GPP Rel-13 standard
◆ Supports only 1 set external SIM card
◆ Supports 3 groups UARTs
◆ Supports 1 sets SPI of chip
◆ GPIO supports 32 sets of GPIOs.
◆ Supports 1 sets of ADC interfaces
◆ NB-IoT power supply 3.3V (typical value)
◆ Radio frequency antenna interface, 50 ohm standard interface
2. Application interface
The AI-NB25 module has 54 patch pins. The following sections briefly describe the
functions of each pin interface of the module.
2.1 Pin Distribution
Fig. 1 Diagram of pin distribution