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  • The S2-LPTX is a high performance ultra-low power RF transmitter, intended for RF wireless applications in the sub-1 GHz band. It is designed to operate in both the license-free ISM and SRD frequency bands at 433, 868 and 920 MHz, but can also be programmed to operate at other additional frequencies in the 413-479 MHz, 826-958 MH.

    The S2-LPTX supports different modulation schemes: 2(G)FSK, 4(G)FSK, OOK and ASK. The air data rate is programmable from 0.1 to 500 kbps.
    The S2-LPTX meets the regulatory requirements applicable in territories worldwide, including Europe, Japan, China and the USA.

    Key Features

    • Frequency bands:
      • 413-479 MHz
      • 826-958 MHz
    • Modulation schemes:
      • 2(G)FSK, 4(G)FSK
      • OOK, ASK
    • Air data rate from 0.1 to 500 kbps
    • Ultra-low power consumption:
      • 10 mA TX @ +10 dBm
    • Programmable RF output power up to +16 dBm
    • Programmable channel spacing
    • Fast start-up and frequency synthesizer settling time
    • Battery indicator and low battery detector
    • TX 128 bytes FIFO buffers
    • 4-wire SPI interface
    • ST companion integrated filter chips are available
    • Fully integrated ultra-low power RC oscillator
    • Wake-up driven by internal timer or external event
    • Flexible packet length with dynamic payload length
    • IEEE 802.15.4g hardware packet support with whitening, FEC, CRC
    • Wireless M-BUS supported
    • Enables operations in the SIGFOX™ network
    • Suitable to build systems targeting:
      • Europe: ETSI EN 300 220, ETSI EN 303 131
      • US: FCC part 15 and part 90
      • Japan: ARIB STD T67, T108
      • China: SRRC
    • Operating temperature range: -40 °C to +105 °C

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Evaluation Tools

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Support and Applications

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS13100
      Sub-1 GHz proprietary radio transmitter
      1.0
      2.44 MB
      PDF
      DS13100

      Sub-1 GHz proprietary radio transmitter

    • Description Version Size Action
      UM2211
      BLE-Sub1 GHz development kit
      2.0
      13.61 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

    • Description Version Size Action
      AN5302
      Power profiling of the 6LoWPAN applications of X-CUBE-SUBG1 v3.1.0 expansion software for STM32Cube
      1.0
      2.98 MB
      PDF
      AN5302

      Power profiling of the 6LoWPAN applications of X-CUBE-SUBG1 v3.1.0 expansion software for STM32Cube

Publications and Collaterals

    • Description Version Size Action
      S2-LP:Ultra-low-power, high-performance, sub-1GHz RF transceiver 4.0
      403.48 KB
      PDF

      S2-LP:Ultra-low-power, high-performance, sub-1GHz RF transceiver

    • 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**
S2-LPTXQTR
Active
QFN-24L Industrial Ecopack3

S2-LPTXQTR

Package:

QFN-24L

Material Declaration**:

Marketing Status

Active

Package

QFN-24L

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
S2-LPTXQTR Available at 3 distributors

Distributor availability ofS2-LPTXQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1779 1 Order Now
MOUSER WORLDWIDE 4960 1 Order Now
Farnell Element14 EUROPE 200 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

1779

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4960

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

200

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

Sample & Buy Buy now
Active
EAR99 NEC Tape And Reel QFN-24L -40 105 PHILIPPINES 1.15 / 1k

S2-LPTXQTR

Marketing Status

Active

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

1.15 / 1k

Distributor availability ofS2-LPTXQTR

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1779 1 Order Now
MOUSER WORLDWIDE 4960 1 Order Now
Farnell Element14 EUROPE 200 1 Order Now

Distributor reported inventory date: 2020-08-10

Distributor Name

DIGIKEY

Stock

1779

Min.Order

1

Region

WORLDWIDE Order Now

MOUSER

Stock

4960

Min.Order

1

Region

WORLDWIDE Order Now

Farnell Element14

Stock

200

Min.Order

1

Region

EUROPE Order Now

Distributor reported inventory date: 2020-08-10

ECCN (EU)

NEC

Packing Type

Tape And Reel

Package

QFN-24L

Operating Temperature (°C)

(min)

-40

(max)

105

Budgetary Price (US$)* / Qty

1.15 / 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