Overview
Sample & Buy
Solutions
Resources
Tools & Software
Quality & Reliability
eDesignSuite
Get Started
Partner products
Sales Briefcase
  • 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).

    An AES 128-bit encryption co-processor is available for secure data transfer. The STS1TX supports different modulation schemes: 2-FSK, GFSK, OOK, ASK, and MSK. Transmitted data bytes are buffered in FIFO (TX FIFO), accessible via the SPI interface for host processing.

    Key Features

    • 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 min.)
    • Programmable output power up to +16 dBm
    • Fast startup and frequency synthesizer settling time (6 μs)
    • 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

Recommended for you

Related Applications

Home, Building and City Automation

Ecosystems

    • Part Number

      Connecting low-power SUB 1GHZ RF transceiver to the Cloud with fully customisable sensors, ARM® 32-bit Cortex®-M4 CPU and coin battery.

Embedded Software

Support and Applications

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS9878
      Low data-rate, low power sub 1 GHz transmitter
      1.0
      2.04 MB
      PDF
      DS9878

      Low data-rate, low power sub 1 GHz transmitter

    • Description Version Size Action
      UM2211
      BLE-Sub1 GHz development kit
      3.0
      12.89 MB
      PDF
      UM2211

      BLE-Sub1 GHz development kit

    • Description Version Size Action
      DT0130
      SubGHz Module integration design guidelines
      1.0
      413.73 KB
      PDF
      DT0130

      SubGHz Module integration design guidelines

Publications and Collaterals

    • Description Version Size Action
      Reference Guide for Sub-1GHz 1.2
      966.67 KB
      PDF

      Reference Guide for Sub-1GHz

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
STS1TXQTR
Active
VFQFPN 20 4x4x1.0 Industrial Ecopack3

STS1TXQTR

Package:

VFQFPN 20 4x4x1.0

Material Declaration**:

Marketing Status

Active

Package

VFQFPN 20 4x4x1.0

Grade

Industrial

RoHS Compliance Grade

Ecopack3

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Marketing Status
ECCN (US)
ECCN (EU)
Packing Type
Package
Temperature (°C) Country of Origin
Budgetary Price (US$)*/Qty
min
max
STS1TXQTR Available at 2 distributors

Distributor availability ofSTS1TXQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10894 1 Order Now
Farnell Element14 EUROPE 3887 1 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

10894

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3887

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

Active
5A992C 5A002A2 Tape And Reel VFQFPN 20 4x4x1.0 -40 85 PHILIPPINES 1.125 / 1k

STS1TXQTR

Marketing Status

Active

ECCN (US)

5A992C

Budgetary Price (US$)*/Qty

1.125 / 1k

Distributor availability ofSTS1TXQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 10894 1 Order Now
Farnell Element14 EUROPE 3887 1 Order Now

Distributor reported inventory date: 2020-09-23

Distributor Name

DIGIKEY

Stock

10894

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

3887

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-09-23

ECCN (EU)

5A002A2

Packing Type

Tape And Reel

Package

VFQFPN 20 4x4x1.0

Operating Temperature (°C)

(min)

-40

(max)

85

Budgetary Price (US$)* / Qty

1.125 / 1k

Country of Origin

PHILIPPINES

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors