The AT86RF211S is a shrink version of the AT86RF211. In addition to cost reduction, the use of the latest RF Atmel process provides it with a high level of robustness and performance (high output power) and significantly improves certain technical features such as power consumption. This is a 100% AT86RF211-compatible product that can be directly replaced in production, without redesigning the hardware or software. New features are also available through the software (activated by the ADDFEAT bit). Like the AT86RF211, this is a single-chip transceiver dedicated to low-power wireless applications, optimized for licence-free ISM band operations from 400 to 950 MHz. Its flexibility and unique level of integration make it a natural choice for any system related to telemetry, remote controls, alarms, radio modems, Automatic Meter Reading, hand-held terminals or high-tech games and appliances. The AT86RF211S makes bi-directional communications affordable for applications such as secured transmissions with hand-shake procedures, new features and services. The AT86RF211S can easily be configured to provide the optimal solution for your application: choice of external filters versus technical requirements (bandwidth, selectivity,