STS1TX Series

Low data rate, low power sub-1GHz transmitter

Catalog

Low data rate, low power sub-1GHz transmitter

Part	Antenna Connector	Voltage - Supply [Max]	Voltage - Supply [Min]	Mounting Type	Frequency	Current - Transmitting	Package / Case	Supplier Device Package	Modulation or Protocol	Data Interface	Data Rate (Max) [Max]	Applications	Operating Temperature [Max]	Operating Temperature [Min]
STMicroelectronics STS1TXQTR	PCB Surface Mount	3.6 V	1.8 V	Surface Mount	169 MHz 315 MHz 433 MHz 868 MHz 915 MHz	21 mA	20-VFQFN Exposed Pad	20-QFN (4x4)	ASK FSK GFSK MSK OOK	PCB Surface Mount	500 kbps	Home/Building Automation Industrial Control and Monitoring	85 °C	-40 C

Catalog

Low data rate, low power sub-1GHz transmitter

Description

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.