Features:

•  Low costing, high performance and price ratio
• Tuning free during production
• FSK transmission
• PLL employed
• Fast PLL lock time
• High resolution PLL with 2.5 KHz step
• Programmable frequency deviation (from 30 kHz to 210 kHz, step 30 kHz)
• Programmable output power
• High data rate (up to 115.2 kbps with FSK modulation)
• Differential antenna output
• Automatic antenna tuning
• SPI interface
• Clock and reset signal output for external MCU use
• 10MHz crystal for PLL reference
• Programmable crystal load capacitor bank
• Wakeup timer
• low battery detection
• 2.2V - 5.4V power supply
• Low power consumption
• Stand by current less than 0.3μA