BUY RN2901 https://www.utsource.net/itm/p/11278843.html
RN2901 PNP+PNP Complex Bipolar Digital Transistor -50V -100mA HEF=30 R1=R2=4.7KΩ 200mW/0.2W SOT-363/US6/SC70-6 marking YA switching inverting interface driver circuit
Description: The RN2901 is a LoRaTM module by Microchip Technology. It is a low-power, long-range, secure, and cost-effective wireless transceiver.
Features:
Integrated LoRaWAN protocol stack
Integrated RF transceiver
Integrated power amplifier
Integrated temperature sensor
Integrated low-noise amplifier
Integrated voltage regulator
Integrated antenna switch
Integrated SPI interface
Integrated UART interface
Integrated ADC
Integrated RTC
Integrated 32-bit ARM Cortex-M0 processor
Small form factor (SOT-363/US6/SC70-6)
Applications:
Smart metering
Asset tracking
Home and building automation
Industrial monitoring and control
Agriculture
Security systems
Wireless sensor networks
(For reference only)