The AX5043 and AX5243 are narrow-band multi-channel single-chip RF transceivers for 27 to 1050MHz Licensed and Unlicensed radio systems.

RF Operating Frequencies: 27 to 1050MHz
RF Output Power: up to +16dBm
Receiver Sensitivity: -137dBm @ 100bps, FSK 868MHz with FEC
Modulation: FSK, MSK, 4−FSK, GFSK, GMSK, ASK or PSK
OTA Date Rate: 125kbps
Channel hopping @ 2000 hops/s
Optional Forward Error Correction (FEC)
Fully automatic packet reception and transmission
Separate matching units for Preamble Byte, Sync-word and Address
Supports HDLC, Raw, Wireless M−Bus frames and arbitrary defined frames
Automatic channel noise-level tracking
Additional single-ended Tx output for use with an external PA (AX5043 only)
256 byte Tx & Rx data FIFO
Wake-on-Radio
Brown-out detection
Host communication: serial SPI
Simple 'cable-replacement' mode available via separate serial data I/O and clock pins (AX5043 only)
10-bit 1MS/s ADC
Power supply: +1.8V to +3.6Vdc
Operating temperature range: -40 to +85°C
Compatible with: Wireless M-Bus, POCSAG, FLEX, KNX, Sigfox, Z−Wave and enocean protocols
Applications: Telemetry, AMR, Wireless networks, Wireless M-Bus, Access control, Building automation, Communication for the Internet of Things (IoT)

RS Product Codes
915-8732 AX5043-1-TA05 QFN28
915-8739 AX5243-1-TA05 QFN20

FCC, ETSI, Wireless-M-Bus