Intersil ISL39000M

Overview
Intersil ISL39000M reference design

The Intersil logo, "ISL39000M", and "REV D" is silkscreened on the board in the FCC photos.
 * A label affixed to the MAC/BBP reads as follows.. "ISL39000M-EVAL", "REV. D8", "0030b401244A"

This device is using the PRISM Duette chipset.

Likely 00:30:B4 (Intersil) OUI (per the label affixed to the board)