SGN6210 Radio IC is a fully integrated 2.4GHz CMOS radio frequency transceiver and GFSK data modem, combined with baseband framing circuitry.
The low external component count and the small package allow you to implement the wireless functionality with a minimized footprint. By incorporating matching circuitry, and all the synthesizer components including a VCO, PLL, resonator and channel filter on chip, external component count is very minimal.
The on-chip framer function offloads the baseband processor from the bit-by-bit interrupt requirement, allowing the designer to focus more on the transport of fully framed data packets. This reduces overall product cost by allowing the use of slower 1 to 10 MHz MCU's, rather than 25 MHz or higher MCU's, while also simplifying the overall product design.

SR0001 Radio IC is successor of SGN6210, which supply more higher transmit power(+4~5 dBm) , more lower power consuming, and better sensitivity(-92dBm@1Mhz bit rate). Both SR0001 and SGN6210 are 24 pins, but not pin compatible.