Quectel EC25 is a popular LTE Cat-4 module in Mini PCIe form factor providing USB 2.0 interface and optional GNSS, widely used in industrial routers, gateways, and embedded computing for broadband connectivity.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | WAKE_N | Wake from sleep | I/O |
| 2 | 3.3V | 3.3V supply | PWR |
| 3 | USB_DM | USB data minus | BUS |
| 4 | GND | Ground | GND |
| 5 | USB_DP | USB data plus | BUS |
| 6 | 1.5V | 1.5V supply | PWR |
| 7 | GND | Ground | GND |
| 20 | W_DISABLE | Wireless disable | I/O |
| 21 | GND | Ground | GND |
| 22 | PERST# | PCIe reset | I/O |
| 23 | MAIN_ANT | Main LTE antenna | BUS |
| 51 | GND | Ground | GND |
| 52 | 3.3V | 3.3V supply | PWR |