CC2431 is not recommended for new designs.
This product continues to be in production to support existing customers. Please consider one of these alternatives:
Similar but not functionally equivalent to the compared device:
Zigbee and IEEE 802.15.4 wireless MCU with up to 256kB Flash and 8kB RAM
This product offers a 256KB RAM option, lower power, improved sensitivity, and up-to-date software support but does not provide an on board location feature.