STMicroelectronics S2-LPQTR RF Transceiver IC, 24-Pin QFN

The S2-LP is a high performance ultra-low power RF transceiver, intended for RF wireless applications in the sub-1 GHz band. It is designed to operate in both the license-free ISM and SRD frequency bands at 433, 868 and 920 MHz, but can also be programmed to operate at other additional frequencies in the 430-470 MHz, 860-940 MHz bands. The S2-LP supports different modulation schemes: 2(G)FSK, 4(G)FSK, OOK and ASK.

Excellent receiver selectivity and blocking
Programmable RF output power up to +16 dBm
Programmable RX digital filter
Programmable channel spacing
Fast startup and frequency synthesizer settling time
Automatic frequency offset compensation, AGC and symbol timing recovery
Embedded timeout protocol engine
Antenna diversity algorithm
Fully integrated ultra-low power RC oscillator
Wake-up driven by internal timer or external event
Digital real time RSSI
Flexible packet length with dynamic payload length