Designed for dependable bi-directional transfer of digital data, the 25 Series RF transceiver module is capable of transmitting over distances of up to 1 mile (1.6km) line of sight. Operating in the 902 to 928MHz ISM (Industrial Scientific and Medical) frequency band, the module is capable of generating +13dBm into a 50-ohm load and achieves an outstanding typical sensitivity of –105dBm. Regulations in the country of operation dictate the maximum legal output power, so the final system range may be less depending on the country of operation.

The 25 Series module implements a Frequency Hopping Spread Spectrum (FHSS) protocol along with networking and assured delivery features. It has a Universal Asynchronous Receiver Transmitter (UART) serial interface that can be connected directly to microcontrollers, RS-232, RS-485 converters or USB adaptors. The module automatically handles all radio functions resulting in a UART-to-antenna wireless link.

The transceiver has a robust built-in protocol. A Carrier Sense Multiple Access (CSMA) algorithm makes sure the channel is clear before sending data. Networking and assured delivery enable many system configurations. The transceiver contains several registers, accessed through the UART, that control its configuration and operation.

Common applications for the 25 Series transceiver module that require reliable digital date transfer include asset tracking, automated meter reading, wireless sensors and industrial as well as home automation.

An evaluation module is available that has the module on a board with an antenna connector and voltage regulator. This module has obtained United States FCC certification and greatly reduces the expense and time to implement a wireless solution.

For more information about the 25 Series RF Transceiver, call Linx at +1 800 736 6677 (+1 541 471 6256 outside the United States) or visit www.linxtechnologies.com.

Linx Technologies
www.linxtechnologies.com