Cisco not currently documented.
For a list of all currently documented Intersil chipsets with specifications, see Intersil.
This device is part of the Cisco Aironet 350 Series.
This card has an additional P/N of 47-11496-01 / 800-12245-06.
Additional specifcations, per the Cisco product page, follow...
Typical Receiver Sensitivity w/ 11b rates (more)
- -94 dBm @ 1M
- -91 dBm @ 2M
- -89 dBm @ 5.5M
- -85 dBm @ 11M