Motorola MG7550

Overview
16x4 DOCSIS 3.0 cable modem
 * 16 downstream channels for speeds up to 686 Mbps
 * 4 upstream channels for speeds up to 123 Mbps

"D9PTK" FBGA code on the RAM corresponds to the MT41K128M16JT-125:K

This datasheet lists the core chipset as a Broadcom BCM33843G.