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Semtech LR2021 LoRa® Plus™ RF Transceiver

Semtech LR2021 LoRa® Plus™ RF Transceiver is a fourth-generation LoRa IP for the LoRa Plus family. The transceiver supports terrestrial and SATCOM networks in the Sub-GHz and 2.4GHz ISM bands and the licensed S-Band. The LR2021 is designed to be backward-compatible with previous LoRa devices, ensuring seamless LoRaWAN® compatibility. The device also features expanded physical-layer modulations for fast, long-range communication (FLRC). It is compatible with various low-power wireless protocols, including Amazon Sidewalk, Meshtastic, W-MBUS, Wi-SUN FSK, and Z-Wave, when integrated with third-party stack offerings. The LR2021 features an advanced RF and analog architecture that supports a multi-region, single-SKU design, decreasing external BOM costs, PCB footprint, and power consumption while delivering superior performance to previous LoRa transceivers.

Features

  • 150MHz to 960MHz bands
  • 1.6GHz to 2.5GHz bands
  • FLRC up to 2.6Mbps
  • LoRa up to 200kbps
  • LR-FHSS for SATCOM
  • SPI Interface
  • 5mm x 5mm QFN package

Applications

  • Security and building automation
  • Smart cities and logistics
  • Smart utilities
  • Smart homes
  • Industrial automation
  • Smart agriculture

Specifications

  • LoRa/LoRaWAN at Sub-GHz and 2.4GHz
  • Sidewalk FSK/CSS PHY
  • Sigfox PHY
  • Wi-SUN FSK PHY
  • W-MBUS PHY (device and collector)
  • 4-FSK PHY
  • Z-Wave PHY, Z-Wave LR PHY
  • 802.15.4 Thread and Zigbee® PHY
  • BLUETOOTH® LE 5.4 PHY compatibility
  • Transmitter (Tx) performance
    • +22dBm to -10dBm in 0.5dB steps
    • +12dBm output at 2.4GHz
  • -40°C to +85°C, 1.8V to 3 .7V supply
  • Receiver (Rx) performance
    • -142dBm at LoRa 125kHz sub-GHz
    • -111dBm at 100kbps DSSS O-QPSK
    • -111dBm at FLRC 260kbps sub-GHz
    • -105dBm at FLRC 1Mbps, -101Mbps at 2.6Mbps
    • -103dBm at 802.15.4 DSSS O-QPSK 250kbps
    • -100dBm at GMSK 1Mbps, -97Mbps at 2Mbps
  • Low current consumption
    • Rx current 5mA to 6mA at sub-GHz
    • Tx current 110mA at +22dBm, 27mA at 14dBm, 14mA at 10dBm sub-GHz
    • 500nA sleep current

Videos

Functional Block Diagram

Block Diagram - Semtech LR2021 LoRa® Plus™ RF Transceiver

System Block Diagram

Block Diagram - Semtech LR2021 LoRa® Plus™ RF Transceiver

Development Tools

Semtech LR2021EVK2XxS1 Evaluation Kits

Incorporates 2 x LoRa Plus™ RF boards and Xiao nRF54L15 modules for global 2.4GHz bands.

Learn Moreabout Semtech LR2021EVK2XxS1 Evaluation Kits View Productsrelated to Semtech LR2021EVK2XxS1 Evaluation Kits
Published: 2025-03-13 | Updated: 2026-08-26