Low data rate, low power Sub 1GHz transceiver

The SPIRIT1 is a very low-power RF transceiver, intended for RF wireless applications in the sub-1 GHz band. It is designed to operate both in the license-free ISM and SRD frequency bands at 169, 315, 433, 868, and 915 MHz, but can also be programmed to operate at other additional frequencies in the 300-348 MHz, 387-470 MHz, and 779-956 MHz bands. The air data rate is programmable from 1 to 500 kbps, and the SPIRIT1 can be used in systems with channel spacing of 12.5/25 kHz, complying with the EN 300 220 standard. It uses a very small number of discrete external components and integrates a configurable baseband modem, which supports data management, modulation, and demodulation. The data management handles the data in the proprietary fully programmable packet format also allows the M-Bus standard compliance format (all performance classes).

However, the SPIRIT1 can perform cyclic redundancy checks on the data as well as FEC encoding/decoding on the packets. The SPIRIT1 provides an optional automatic acknowledgement, retransmission, and timeout protocol engine in order to reduce overall system costs by handling all the high-speed link layer operations.

Moreover, the SPIRIT1 supports an embedded CSMA/CA engine. An AES 128-bit encryption co-processor is available for secure data transfer. The SPIRIT1 fully supports antenna diversity with an integrated antenna switching control algorithm. The SPIRIT1 supports different modulation schemes: 2-FSK, GFSK, OOK, ASK, and MSK. Transmitted/received data bytes are buffered in two different three-level FIFOs (TX FIFO and RX FIFO), accessible via the SPI interface for host processing.

Key Features

  • Frequency bands: 150-174 MHz, 300-348 MHz, 387-470 MHz, 779-956 MHz
  • Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK
  • Air data rate from 1 to 500 kbps
  • Very low power consumption (9 mA RX and 21 mA TX at +11 dBm)
  • Programmable RX digital filter from 1 kHz to 800 kHz
  • Programmable channel spacing (12.5 kHz min.)
  • Excellent performance of receiver sensitivity (-118 dBm), selectivity, and blocking
  • Programmable output power up to +16 dBm
  • Fast startup and frequency synthesizer settling time (6 μs)
  • Frequency offset compensation
  • Integrated temperature sensor
  • Battery indicator and low battery detector
  • RX and TX FIFO buffer (96 bytes each)
  • Configurability via SPI interface
  • Automatic acknowledgment, retransmission, and timeout protocol engine
  • AES 128-bit encryption co-processor
  • Antenna diversity algorithm
  • Fully integrated ultra low power RC oscillator
  • Wake-up on internal timer and wake-up on external event
  • Flexible packet length with dynamic payload length
  • Sync word detection
  • Address check
  • Automatic CRC handling
  • FEC with interleaving
  • Digital RSSI output
  • Programmable carrier sense (CS) indicator
  • Automatic clear channel assessment (CCA) before transmitting (for listen-before-talk systems). Embedded CSMA/CA protocol
  • Programmable preamble quality indicator (PQI)
  • Whitening and de-whitening of data
  • Wireless M-BUS, EN 300 220, FCC CFR47 15 (15.205, 15.209, 15.231, 15.247, 15.249), and ARIB STD T-67, T93, T-108 compliant
  • QFN20 4x4 mm RoHS package
  • Operating temperature range from -40 °C to 105 °C


Technical Documentation

Product Specifications
Description Version Size
Low data rate, low power sub-1GHz transceiver 10.0 1 MB
Application Notes
Description Version Size
Antenna selection guidelines 1.1 1 MB
Autonomous wireless multi-sensor node powered by PV cells and based on SPV1050 (SPIDEr™) 1.0 2 MB
Low duty cycle operation with the SPIRIT1 transceiver 2.0 225 KB
PCB design guidelines for the SPIRIT1 transceiver 2.0 652 KB
SPIRIT1: increasing the output power 1.0 387 KB
Using the SPIRIT1 transceiver under ARIB STD-T108 in the 920 MHz band 1.1 1 MB
Using the SPIRIT1 transceiver under ARIB STD-T93 in the 315 MHz band 1.1 1 MB
Using the SPIRIT1 transceiver under EN 300 220 at 169 MHz 1.0 2 MB
Using the SPIRIT1 transceiver under EN 300 220 at 434 MHz 1.0 1 MB
Using the SPIRIT1 transceiver under EN 300 220 at 868 MHz 1.0 1 MB
Using the SPIRIT1 transceiver under FCC title 47 part 15 in the 315 MHz band 1.1 831 KB
Using the SPIRIT1 transceiver under FCC title 47 part 15 in the 902 – 928 MHz band 1.1 4 MB
Using the SPIRIT1 transceiver under the ARIB STD-T67 standard in the 426 MHz band 1.0 2 MB
Using the SPIRIT1 transceiver with range extender under EN 300 220 at 169 MHz 1.0 1 MB
Using the SPIRIT1 transceiver with range extender under EN 300 220 at 868 MHz 1.0 1 MB
wM-Bus (2013) firmware stack overview 1.0 786 KB
User Manuals
Description Version Size
BLE-Sub1GHz development kit 1.2 1 MB
SPIRIT1 development kit 3.0 1 MB
Sample wM-Bus 2013 application layer implementation for SPIRIT1 boards 1.0 1 MB
Errata Sheets
Description Version Size
SPIRIT1 device limitations 7.0 157 KB
Design Notes & Tips
Description Version Size
Running a simple 6LowPAN network consisting of one receiver node and one or more sensor nodes in a Sub-1GHz RF band 1.1 281 KB

Publications and Collaterals

Description Version Size
High-quality RF IPD baluns for ISM bands simplify RF complexity. 2.2 1 MB
Description Version Size
Wireless connectivity for IoT applications 2.0 2 MB

Tools and Software

Embedded Software
Evaluation Tool Software
Evaluation Tools
Solution Evaluation Tools
Support & Community

Sample & Buy

Part Number Package Packing Type Operating Temperature (°C) (min) Operating Temperature (°C) (max) Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
SPIRIT1QTR VFQFPN 20 4x4x1.0 Tape And Reel -40 85 Active 1.38 1000 5A002A1A 5A992C PHILIPPINES MORE INFO Get Sample Add to cart DISTRIBUTOR AVAILABILITY

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

Quality & Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
SPIRIT1QTR ActiveVFQFPN 20 4x4x1.0IndustrialEcopack3 0 0

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.