RF Transceivers
  • SX1272
  • Long Range, Low Power RF Transceiver 860-1000MHz with LoRa(TM)
  • SX1276
  • 137-1050 MHz Ultra Low Power Long Range Transceiver
  • SX1236
  • 137 MHz to 1020 MHz Low Power Bi-Band Transceiver
  • SX1238
  • SX1238 - Fully Integrated Transceiver with +27dBm TX Power
  • SX1301
  • Base Band Processor for Data Concentrator for Long Range Communication Network
  • SX1208
  • Low Power Integrated UHF Transceiver
  • SX1232
  • Ultra Low Power (9.3mA RX) High Performance RF Transceiver
  • SX1211
  • Ultra Low Power (3mA RX) RF Transceiver 862-960MHz
Semtech SX1235

Semtech SX1235

ETSI Category 1 Compliant RF Transceiver

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The SX1235 is a highly integrated RF transceiver optimized for operation compliant with ETSI EN 300 220 receiver category 1.


  • High sensitivity: down to -123 dBm at 1.2 kbps
  • High selectivity: 60 dB typ. ACR
  • High linearity: 50 dB typ. of adjacent channel saturation
  • 80 dB Blocking immunity, 100 dB with SAW
  • Image rejection of over 45 dB
  • Low current: Rx = 9.3 mA, 100nA register retention
  • Programmable output power +20 dBm in 1 dB steps
  • Optional high efficiency or fully regulated PA connections for reliable M2M performance and optimal battery lifetime
  • Voltage operation from 1.8 to 3.7 V
  • Narrowband integrated synthesizer with a resolution of 61 Hz
  • FSK, GFSK, MSK, GMSK and OOK modulation
  • Automated, fast frequency correction & timing recovery
  • Over 115 dB Dynamic Range RSSI
  • Packet engine with CRC 64 byte FIFO
  • Preamble and RSSI based channel activity detection


  • Category 1 Social Alarm Systems
  • Category 1 Fire, Smoke and Toxic Gas Detection
  • Category 1 Lone Worker Systems
  • Home and Building Automation
  • Wireless Alarm and Security Systems
  • Industrial Monitoring and Control


  • QFN24

Order Codes

  • SX1235IMLTRT
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