Ultra-low power, high performance, sub-1GHz transceiver

The S2-LP is a high performance ultra-low power RF transceiver, intended for RF wireless applications in the sub-1 GHz band. It is designed to operate in both the license-free ISM and SRD frequency bands at 433, 512, 868 and 920 MHz, but can also be programmed to operate at other additional frequencies in the 430-470 MHz, 470-512 MHz, 860-940 MHz bands.

The S2-LP supports different modulation schemes: 2(G)FSK, 4(G)FSK, OOK and ASK. The air data rate is programmable from 0.1 to 500 kbps.

The S2-LP can be used in systems with channel spacing down to 1 kHz enabling the narrow band operations.

The S2-LP shows an RF link budget higher than 140 dB for long communication ranges and meets the regulatory requirements applicable in territories worldwide, including Europe, Japan, China and the USA.

Key Features

  • Frequency bands:
    • 430-470 MHz (S2-LPQTR)
    • 470-512 MHz (S2-LPCBQTR)
    • 860-940 MHz (S2-LPQTR)
  • Modulation schemes:
    • 2(G)FSK, 4(G)FSK
    • OOK, ASK
  • Air data rate from 0.1 to 500 kbps
  • Ultra-low power consumption:
    • 7 mA RX
    • 10 mA TX @ +10 dBm
  • Excellent performance of receiver sensitivity: down to -130 dBm
  • Excellent receiver selectivity and blocking
  • Programmable RF output power up to +16 dBm
  • Programmable RX digital filter
  • Programmable channel spacing
  • Fast start-up and frequency synthesizer settling time
  • Automatic frequency offset compensation, AGC and symbol timing recovery
  • More than 145 dB RF link budget
  • Battery indicator and low battery detector
  • RX and TX 128 bytes FIFO buffers
  • 4-wire SPI interface
  • Automatic packet acknowledgment and retransmission
  • Embedded timeout protocol engine
  • Excellent receiver selectivity (> 80 dB @ 2 MHz)
  • ST companion integrated balun/filter chips are available
  • Antenna diversity algorithm
  • Fully integrated ultra-low power RC oscillator
  • Wake-up driven by internal timer or external event
  • Digital real time RSSI
  • Flexible packet length with dynamic payload length
  • Programmable preamble and SYNC word quality filtering and detection
  • Embedded CSMA/CA engine based on listen-before-talk systems
  • IEEE 802.15.4g hardware packet support with whitening, FEC, CRC and dual SYNC word detection
  • Wireless M-BUS supported
  • Enables operations in the SIGFOX™ networks
  • Suitable to build systems targeting:
    • Europe: ETSI EN 300 220, category 1.5 natively compliant, ETSI EN 303 131
    • US: FCC part 15 and part 90
    • Japan: ARIB STD T67, T108
    • China: SRRC
    • Operating temperature range: -40 °C to +105 °C


Technical Documentation

Product Specifications
Description Version Size
DS11896 DS11896: Ultra-low power, high performance, sub-1GHz transceiver 2.0 2 MB
Application Notes
Description Version Size
AN4190 AN4190: Antenna selection guidelines 1.1 1 MB
AN4947 AN4947: PCB design guidelines for the S2-LP transceiver 2.0 1 MB
AN4962 AN4962: S2-LP ETSI compliance test at 868 MHz SRD band 1.0 1 MB
AN4953 AN4953: Using the S2-LP transceiver under ARIB STD-T108 in the 920 MHz band 1.0 4 MB
AN4997 AN4997: Using the S2-LP transceiver under FCC Title 47 Part 15 in the 430 - 470 MHz band 1.0 847 KB
AN4949 AN4949: Using the S2-LP transceiver under FCC title 47 part 15 in the 902 – 928 MHz band 1.0 1 MB
AN5009 AN5009: Using the S2-LP transceiver under FCC title 47 part 90 in the 450 - 470 MHz band 1.0 938 KB
AN5008 AN5008: Using the S2-LP transceiver under the ARIB STD-T67 standard 1.0 871 KB
AN5029 AN5029: Using the S2-LP transceiver with FEM at 500 mW under FCC title 47 part 15 in the 902 – 928 MHz band 1.0 2 MB
User Manuals
Description Version Size
UM2211 UM2211: BLE-Sub1GHz development kit 1.2 1 MB
Errata Sheets
Description Version Size
ES0386 ES0386: Silicon limitations 1.0 153 KB
Design Notes & Tips
Description Version Size
DT0094 DT0094: KeeLoq RX application over S2-LP 1.0 530 KB

Publications and Collaterals

Description Version Size
High-quality RF IPD baluns for ISM bands simplify RF complexity. 2.2 1 MB
S2-LP:Ultra-low-power, high-performance, sub-1GHz RF transceiver 3.0 1 MB
Description Version Size
Wireless connectivity for IoT applications 2.0 2 MB

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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
S2-LPCBQTR QFN-24L Tape And Reel -40 105 Evaluation 1.44 1 NEC EAR99 - MORE INFO No availability reported, please contact our Sales office
S2-LPQTR QFN-24L Tape And Reel -40 105 Active 1.44 1000 NEC EAR99 - 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**
S2-LPCBQTR EvaluationQFN-24LIndustrialEcopack3
S2-LPQTR ActiveQFN-24LIndustrialEcopack3 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.