
SIMCom A7681S LTE Cat 1 Multi-Band LCC+LGA Cellular Module is a compact LTE Cat 1 cellular communication module designed for IoT, telematics, surveillance equipment, industrial routers, remote diagnostics, and other cellular-connected applications. The A7681S supports LTE-FDD and LTE-TDD operation with downlink speeds up to 10Mbps and uplink speeds up to 5Mbps. It operates from 3.4V to 4.2V with a specified supply voltage of 3.8V and integrates USB 2.0. The module uses an LCC+LGA form factor measuring 15.7 × 17.6 × 2.1mm, USB firmware updates, and FOTA. It also provides a compatible form factor for SIM800C and SIM868 series migration to LTE Cat 1 connectivity.
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1 × SIMCom A7681S LTE Cat 1 Multi-Band LCC+LGA Cellular Module
| Manufacturer | SIMCom |
|---|---|
| Model | A7681S |
| Product Type | LTE Cat 1 Cellular Module |
| Cellular Technology | LTE Cat 1 |
| LTE Duplex Modes | LTE-FDD / LTE-TDD |
| LTE-FDD Bands | B1 / B3 / B5 / B8 |
| LTE-TDD Bands | B34 / B38 / B39 / B40 / B41 |
| Maximum Downlink Rate | 10Mbps |
| Maximum Uplink Rate | 5Mbps |
| Supply Voltage | 3.4V to 4.2V |
| Control Method | AT Commands |
| Operating Temperature | -40°C to +85°C |
| Dimensions | 15.7 × 17.6 × 2.1mm |
| Weight | 1.1g ± 0.1g |
| Form Factor | LCC + LGA |
| USB Interface | USB 2.0 |
| Serial Interface | UART |
| Peripheral Interfaces | SPI / I²C / ADC / GPIO |
| SIM Voltage | 1.8V / 3V |
| SIM Interface | (U)SIM |
| Network Protocols | TCP/IP / IPv4 / IPv6 |
| Firmware Update | USB / FOTA |
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