Ambit Microsystems U98H024
For a list of all currently documented Broadcom chipsets with specifications, see Broadcom.
The regulatory model for this device is RSVLD-0303 / RSVLD0303. It is HP P/N 1253-5707.
It would appear to be the wireless module of some HP printers.. and is likely based or fully using the BCM94712P reference design.