Features:

• low costing, high performane 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 30kHz to 210kHz, step 30kHz)
• programmable output power
• high data rate (up to 115.2kbps 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 0.3uA