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SparkFun Electronics
315MHz and 434MHz RF Link Transmitter Boards
Texas Instruments
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Low Data-Rate, Low Power Sub-1GHz Transmitter


The STS1TX is a very low-power RF transmitter intended for RF wireless applications in the sub-1 GHz band. It is designed to operate both in the license-free ISM and SRD frequency bands at 169, 315, 433, 868, and 915 MHz, but can also be programmed to operate at other frequencies in the 300-348, 387-470, and 779-956 MHz bands. The air data rate is programmable from 1 to 500 kbps, and the STS1TX can be used in systems with channel spacing of 12.5/25 kHz, complying with the EN 300 220 standard. It uses very few discrete external components and integrates a configurable baseband modem, which supports data management and modulation. The data management handles the data in the proprietary fully-programmable packet format, and also allows the M-Bus standard compliance format (all performance classes).

  • Frequency bands: 150-174 MHz, 300-348 MHz, 387-470 MHz, 779-956 MHz
  • Modulation schemes: 2-FSK, GFSK, MSK, GMSK, OOK, and ASK
  • Air data rate from 1 to 500 kbps
  • Very low power consumption (21 mA TX at +11 dBm)
  • Programmable channel spacing (12.5 kHz minimum)
  • Programmable output power up to +16 dBm
  • Fast startup and frequency synthesizer settling time (6µs)
  • Integrated temperature sensor
  • Battery indicator and low battery detector
  • TX FIFO buffer (96 bytes each)
  • Configurability via SPI interface
  • AES 128-bit encryption co-processor
  • Fully integrated ultra low power RC oscillator
  • Wakeup on internal timer and on external event
  • Flexible packet length with dynamic payload length
  • Automatic CRC handling
  • FEC with interleaving
  • Whitening of data
  • Wireless M-BUS, EN 300 220, FCC CFR47 15 (15.205, 15.209, 15.231, 15.247, 15.249), and ARIB STD T-67, T93, T-108 compliant QFN20 4x4 mm RoHS package
  • Operating temperature range from -40°C to 85°C
  • AMR (automatic meter reading)
  • Home and building automation
  • WSN (wireless sensors network)
  • Industrial monitoring and control
  • Wireless fire and security alarm systems
  • Point-to-point wireless link
  • Antenna Connector:PCB, Surface Mount
  • Applications:Home/Building Automation, Industrial Control and Monitoring
  • Current - Transmitting:21mA
  • Data Interface:PCB, Surface Mount
  • Data Rate (Max):500kbps
  • Frequency:169MHz, 315MHz, 433MHz, 868MHz, 915MHz
  • Modulation or Protocol:ASK, FSK, GFSK, MSK, OOK
  • Mounting Type:Surface Mount
  • Operating Temperature:-40°C ~ 85°C
  • Package / Case:20-VFQFN Exposed Pad
  • Power - Output:16dBm
  • Supplier Device Package:20-QFN (4x4)
  • Voltage - Supply:1.8V ~ 3.6V

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STS1TXQTRSTS1TXQTRRF TX IC ASK 169/315MHZ 20VQFN 169MHz, 315MHz, 433MHz, 868MHz, 915MHzHome/Building Automation, Industrial Control and MonitoringASK, FSK, GFSK, MSK, OOK500kbps20-VFQFN Exposed PadRoHS

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