The On Semiconductor single chip low power CMOS transmitter primarily for use in SRD bands, the on−chip transmitter consists of a fully integrated RF front−end with modulator, and demodulator, base band data processing is implemented in an advanced and flexible communication controller that enables user friendly communication via the SPI interface, it can be operated from a 2.2 V to 3.6 V power supply over a temperature range of −40°C to 85°C, it consumes 11 − 45 mA for transmitting, depending on the output power.

Advanced multi−channel single chip UHF transmitter
Configurable for usage in 400−470 MHz and 800−940 MHz ISM bands
Wide variety of shaped modulations supported (ASK, PSK,OQPSK, MSK, FSK, GFSK, 4−FSK)
Data rates from 1 to 350 kbps (FSK, MSK, GFSK,4−FSK), 1 to 2000 kbps (ASK), 10 to 2000 kbps (PSK)
Ultra fast settling RF frequency synthesizer for low−power consumption
802.15.4 compatible
RF Carrier frequency and FSK deviation
Fully integrated RF frequency synthesizer with VCO
Auto ranging and Bandwidth Boost Modes for Fast Locking
On chip communication controller and flexible digital modulator
Crystal oscillator with programmable
Trans conductance and programmable internal tuning
SPI Micro−controller Interface