New Product Introduction

STMicroelectronics S2-LP low power sub-1GHz transceiver

The S2-LP is a ultra-low power, high performance, sub-1GHz transceiver for RF wireless applications.


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, 868 and 920 MHz, but can also be programmed to operate at other additional frequencies in the 430-470 MHz, 860-940 MHz bands. It supports different modulation schemes: 2(G)FSK, 4(G)FSK, OOK and ASK. The air data rate is programmable from 0.3 to 500 kbps and can be used in systems with channel spacing of 12.5/25 kHz enabling the narrow band operations.


Key features

  • Receiver sensitivity: down to -130 dBm
  • Programmable RF output power up to +16 dBm
  • Ultra-low power consumptio
  • Programmable RX digital filter

Additional features

  • Frequency bands:
    • 430-470 MHz
    • 860-940 MHz
  • Modulation schemes:
    • 2(G)FSK, 4(G)FSK
    • OOK, ASK
  • Air data rate from 0.3 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
  • Bit rate from 0.3 to 500 kbps
  • Programmable RX digital filter
  • Programmable channel spacing
  • Fast startup and frequency synthesizer settling time
  • Automatic frequency offset compensation, AGC and symbol timing recovery
  • More than 140 dB RF link budget
  • Battery indicator and low battery detector
  • RX and TX FIFO buffers
  • 4 wires SPI interface
  • Automatic packet acknowledgment and retransmission
  • Embedded timeout protocol engine
  • 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, ETSI EN 303 131
    • US: FCC part 15 and part 90
    • Japan: ARIB STD T67, T108
    • China: SRRC
  • Operating temperature range -40 °C to +85 °C

Key applications

  • Sensors to Cloud
  • Smart metering
  • Home energy management systems
  • Wireless alarm systems
  • Smart home
  • Building automation
  • Industrial monitoring and control
  • Smart lighting system


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