RF Transmitters
  • SX1223
  • Single-Chip Multi-Channel Low-Power UHF RF Transmitter
  • SX1230
  • +17dBm RF Transmitter, 315/433/868/915MHz
Semtech SX1243

Semtech SX1243

Low cost, low current +10dBm RF Transmitter, 310-928MHz

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The SX1243 is an ultra-low-cost, fully integrated FSK or OOK transmitter suitable for operation between 310 and 450 MHz, 860 and 870 MHz, as well as 902 and 928 MHz.


  • +10 dBm or 0 dBm Configurable output power
  • Bit rates up to 100 kbps
  • OOK and FSK modulation.
  • 1.8 to 3.7 V supply range.
  • Low BOM Fully Integrated Tx
  • Fractional-N PLL with 1.5 kHz typical step
  • Frequency agility for FHSS modulation
  • AEC-Q100 Qualified Part
  • FCC CFR Part 15.247 Digital Modulation Techniques


  • Garage Door Openers
  • Low-Cost Consumer Electronic Applications
  • Remote Keyless Entry (RKE)
  • Remote Control / Security Systems


  • DFN-UT8

Order Codes

  • SX1243IULTRT - Pb-Free, Halogen Free, RoHS/WEEE compliant product
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