RF Transmitters
  • SX1223
  • Single-Chip Multi-Channel Low-Power UHF RF Transmitter
  • SX1230
  • +17dBm RF Transmitter, 315/433/868/915MHz
  • SX1243
  • Low cost, low current +10dBm RF Transmitter, 310-928MHz
Semtech SX1242

Semtech SX1242

Low Cost Integrated Transmitter IC

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The SX1242 is an ultra-low-cost, fully integrated standalone OOK transmitter suitable for operation at 344.940 MHz. The SX1242 is designed for use without the requirement for configuration via an MCU. The SX1242 offers integrated radio performance with cost efficiency and is suited for operation in North America (FCC part 15.231).


  • +12 dBm Output Power
  • 344.940 MHz Operation
  • OOK Bit Rates up to 10 kbps
  • Pre-Configured Modes for Operation without MCU
  • 1.8 to 3.7 V Supply Range
  • Low BOM Fully Integrated TX


  • Low-Cost Consumer Electronic Applications
  • Remote Keyless Entry (RKE)
  • Remote Control / Security Systems
  • Audio Accessories
  • Process and building / home control


  • SOIC8-EP

Order Codes

  • SX1242ISETRT - Pb-Free, Halogen Free, RoHS/WEEE compliant product
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