Features
• Frequency bands:
– 433-434 MHz (S2-LPSQTR)
– 868-870 MHz (S2-LPSQTR)
• Modulation schemes:
– 2(G)FSK
– OOK, ASK
• Air data rate from 0.1 to 500 kbps
• Ultra-low power consumption:
– 7 mA RX
– 10 mA TX @ +10 dBm
• Excellent performance of receiver sensitivity: down to -130 dBm
• Excellent receiver selectivity and blocking
• Programmable RF output power up to +16 dBm
• Programmable RX digital filter
• Programmable channel spacing
• Fast start-up and frequency synthesizer settling time
• Automatic frequency offset compensation, AGC and symbol timing recovery
• More than 145 dB RF link budget
• Battery indicator and low battery detector
• RX and TX 128 bytes FIFO buffers
• 4-wire SPI interface
• Embedded timeout protocol engine
• Excellent receiver selectivity (> 80 dB @ 2 MHz)
• ST companion integrated balun/filter chips are available
• Antenna diversity algorithm
• Fully integrated ultra-low power RC oscillator
• Wake-up driven by internal timer or external event
• Digital real time RSSI
• Flexible packet length with dynamic payload length
• Programmable preamble and SYNC word quality filtering and detection
• KNX-RF supported
• Suitable to build systems targeting:
– Europe: ETSI EN 300 220, category 1.5 natively compliant, ETSI EN 303
131
– US: FCC part 15 and part 90
– Japan: ARIB STD T67, T108
– China: SRRC
• Operating temperature range: -40 °C to +85 °C

Applications
• Sensors to Cloud
• Smart metering
• Home energy management systems
• Wireless alarm systems
• Smart home
• Building automation
• Industrial monitoring and control
• Smart lighting systems

Description
The S2-LPS is a high performance ultra-low power RF transceiver, 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 MHz, but can also be
programmed to operate at other additional frequencies in the 413-479 MHz, 826-958
MHz bands.
The S2-LPS supports different modulation schemes: 2(G)FSK, OOK and ASK. The
air data rate is programmable from 0.1 to 500 kbps.
The S2-LPS can be used in systems with channel spacing down to 1 kHz enabling
the narrow band operations.
The S2-LPS shows an RF link budget higher than 140 dB for long communication
ranges and meets the regulatory requirements applicable in territories worldwide,
including Europe, Japan, China and the USA.