Design Win Education

Low data rate, low power Sub 1GHz transceiver

Download datasheet Order Direct

Product overview


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.

  • All 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

You might also like...

EDA Symbols, Footprints and 3D Models

STMicroelectronics - SPIRIT1

Speed up your design by downloading all the EDA symbols, footprints and 3D models for your application. You have access to a large number of CAD formats to fit with your design toolchain.

Please select one model supplier :





3D model

3D models

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
VFQFPN 20 4x4x1.0 Industrial Ecopack3



VFQFPN 20 4x4x1.0

Material Declaration**:

Marketing Status



VFQFPN 20 4x4x1.0



RoHS Compliance Grade


(**) 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.

Sample & Buy

Swipe or click the button to explore more details Don't show this again
Part Number
Marketing Status
Budgetary Price (US$)*/Qty
Order from ST
Order from distributors
Packing Type
Country of Origin
Temperature (°C)
Operating Temperature (°C) (min)
Available at distributors

Distributor availability of SPIRIT1QTR

Distributor Name
Region Stock Min. Order Third party link

Distributor reported inventory date:

No availability of distributors reported, please contact our sales office
VFQFPN 20 4x4x1.0 Tape and Reel PHILIPPINES 5A992.c 5A002.a.2 -40 85



Budgetary Price (US$)*/Qty:
VFQFPN 20 4x4x1.0
Packing Type:
Tape and Reel
Country of Origin:

Part Number:


Operating Temperature (°C)





Distributor Name

Distributor reported inventory date:

Swipe or click the button to explore more details Don't show this again

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