SPSGRFC Datasheet Sub-1 GHz (433, 868 or 915 MHz) programmable transceiver module Features Based on the SPIRIT1 very low power RF sub-1 GHz transceiver Programmable radio features Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, ASK Air data rate from 1 to 500 kbps On-board U.FL connector for external antenna Operating temperature range from - 40 C to 85 C RF features Receiver sensitivity: -118 dBm Programmable RF output power up to +11.6 dBm Host interface SPI General I/O Up to 32 programmable I/O functions on 4 GPIO programmable module pins Three carrier frequency versions 433 MHz for externally tuned antenna 868 MHz for externally tuned antenna 915 MHz for externally tuned antenna Dimensions: 11.5 x 13.5 x 2.0 mm Product status link Applications SPSGRFC AMR (automatic meter reading) Home and building automation WSN (wireless sensor network) Industrial monitoring and control Wireless fire and security alarm systems Point-to-point wireless link 6LoWPAN MESH network Wireless M-Bus protocol stack Description The SPSGRFC is an easy-to-use sub-1 GHz transceiver certified module with many programmable features. The module provides a complete RF platform in a tiny form factor. The module can operate at the 433, 868 or 915 MHz frequency band, SPSGRFC-433, SPSGRFC-868 and SPSGRFC-915, respectively. The SPSGRFC RF module is CE, FCC and IC certified and integrates wireless connectivity in target electronic devices without requiring particular RF experience or expertise. This certified solution optimizes the time to market of the final applications. The module is designed for maximum performance in a minimal space, with 4 programmable I/O pins and an SPI serial interface. The SPSGRFC is pin to pin and firmware compatible with SPSGRF family. DS11951 - Rev 4 - October 2021 www.st.com For further information contact your local STMicroelectronics sales office.SPSGRFC Block schematic 1 Block schematic Figure 1. Block diagram Battery or External Supply SPSGRF-xxx Module SUPPLY FILTER 868 MHz or 915 MHz Bead Ferrite or 433 MHz EXTERNAL ANTENNA Host Controller SPI LINE interface RF RF SPIRIT1 TUNING BALUN DEVICE NETWORK + Filter Programmable I/O I/O M.C.U. clock 50 MHz Crystal UFL RF connector for external antenna GSPG3011161035SG DS11951 - Rev 4 page 2/41