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) Link quality indication (LQI) Programmable RX digital filter from 1 kHz to Whitening and de-whitening of data 800 kHz Wireless M-BUS, EN 300 220, FCC CFR47 15 Programmable channel spacing (12.5 kHz (15.205, 15.209, 15.231, 15.247, 15.249), and min.) ARIB STD T-67, T93, T-108 compliant Excellent performance of receiver sensitivity (- QFN20 4x4 mm RoHS package 118 dBm), selectivity, and blocking Operating temperature range from -40 C to 85 Programmable output power up to +16 dBm C Fast startup and frequency synthesizer settling time (6 s) Applications Frequency offset compensation AMR (automatic meter reading) Integrated temperature sensor Home and building automation Battery indicator and low battery detector WSN (wireless sensors network) RX and TX FIFO buffer (96 bytes each) Industrial monitoring and control Configurability via SPI interface Wireless fire and security alarm systems Automatic acknowledgment, retransmission, Point-to-point wireless link and timeout protocol engine AES 128-bit encryption co-processor Table 1. Device summary Antenna diversity algorithm Order code Package Packing Fully integrated ultra low power RC oscillator SPIRIT1QTR QFN20 Tape and reel May 2013 DocID022758 Rev 5 1/101 This is information on a product in full production. www.st.com 101Contents SPIRIT1 Contents 1 Description . 7 2 Introduction 8 3 Typical application diagram and pin description . 10 3.1 Typical application diagram . 10 4 Pinout 14 5 Absolute maximum ratings and thermal data . 15 6 Characteristics 16 6.1 General characteristics . 16 6.2 Electrical specifications 16 6.2.1 Electrical characteristics 16 6.2.2 Digital SPI . 17 6.2.3 RF receiver 18 6.2.4 RF transmitter 23 6.2.5 Crystal oscillator 27 6.2.6 Sensors . 29 7 Operating modes . 30 7.1 Reset sequence 33 7.2 Timer usage . 34 7.3 Low duty cycle reception mode 34 7.3.1 LDC mode with automatically acknowledgement 35 7.4 CSMA/CA engine . 36 8 Block description 39 8.1 Power management . 39 8.1.1 Switching frequency 39 8.2 Power-on-reset (POR) . 39 8.3 Low battery indicator 39 8.4 Voltage reference . 40 2/101 DocID022758 Rev 5