SPIRIT1 Low data rate, low power sub-1GHz transceiver Datasheet - production data Wake-up on internal timer and wake-up on external event Flexible packet length with dynamic payload length Sync word detection Address check QFN20 Automatic CRC handling FEC with interleaving Features Digital RSSI output Frequency bands: 150-174 MHz, 300-348 Programmable carrier sense (CS) indicator MHz, 387-470 MHz, 779-956 MHz Automatic clear channel assessment (CCA) Modulation schemes: 2-FSK, GFSK, MSK, before transmitting (for listen-before-talk GMSK, OOK, and ASK systems). Embedded CSMA/CA protocol Air data rate from 1 to 500 kbps Programmable preamble quality indicator (PQI) Very low power consumption (9 mA RX and 21 mA TX at +11 dBm) Whitening and de-whitening of data Programmable RX digital filter from 1 kHz to Wireless M-BUS, EN 300 220, FCC CFR47 15 800 kHz (15.205, 15.209, 15.231, 15.247, 15.249), and ARIB STD T-67, T93, T-108 compliant Programmable channel spacing (12.5 kHz min.) QFN20 4x4 mm RoHS package Excellent performance of receiver sensitivity (- Operating temperature range from -40 C to 118 dBm), selectivity, and blocking 105 C Programmable output power up to +16 dBm Fast startup and frequency synthesizer settling Applications time (6 s) AMR (automatic meter reading) Frequency offset compensation Home and building automation Integrated temperature sensor WSN (wireless sensors network) Battery indicator and low battery detector Industrial monitoring and control RX and TX FIFO buffer (96 bytes each) Wireless fire and security alarm systems Configurability via SPI interface Point-to-point wireless link Automatic acknowledgment, retransmission, and timeout protocol engine Table 1. Device summary AES 128-bit encryption co-processor Order code Package Packing Antenna diversity algorithm SPIRIT1QTR QFN20 Tape and reel Fully integrated ultra low power RC oscillator August 2021 DocID022758 Rev 11 1/104 This is information on a product in full production. www.st.comContents SPIRIT1 Contents 1 Description . 8 2 Introduction 9 3 Typical application diagram and pin description . 11 3.1 Typical application diagram 11 4 Pinout 15 5 Absolute maximum ratings and thermal data . 16 6 Characteristics 17 6.1 General characteristics . 17 6.2 Electrical specifications 17 6.2.1 Electrical characteristics 17 6.2.2 Digital SPI . 18 6.2.3 RF receiver 19 6.2.4 RF transmitter 24 6.2.5 Crystal oscillator 29 6.2.6 Sensors . 30 7 Operating modes . 32 7.1 Reset sequence 35 7.2 Timer usage . 36 7.3 Low duty cycle reload mode . 36 7.3.1 LDC mode with automatically acknowledgement 38 7.4 CSMA/CA engine . 38 8 Block description 42 8.1 Power management . 42 8.1.1 Switching frequency 42 8.2 Power-on-reset (POR) . 42 8.3 Low battery indicator 42 8.4 Voltage reference . 43 2/104 DocID022758 Rev 11