BCM3215 - Octal Downstream DOCSIS®/EuroDOCSIS™ 3.0-Based CMTS MAC

Octal Downstream DOCSIS®/EuroDOCSIS™ 3.0-Based CMTS MAC

The BCM3215 is a highly integrated octal downstream core MAC chip for use in DOCSIS M-CMTS™ products. The chip serves as the heart of a next-generation core MAC implementation and significantly increases the density of downstream modules in digital cable modem head-end equipment. The chip features eight channels, each with integrated DOCSIS MAC and M-CMTS functions.

The BCM3215 accepts data packets from the integrated GMII and places them in priority queues. The packets then undergo payload header suppression, DOCSIS header creation, DES/AES encryption, CRC and HCS generation, MPEG encapsulation, and timestamp generation. The BCM3215 supports up to 560 Mbps of any packet size with the ability to queue packets from the GMII interface at the full 1000 Mbps rate.

  • Broadcom's BCM3215 is a DOCSIS Core MAC chip with support for eight channels in M-CMTS applications
  • Support for Downstream Edge PHY Interface (DEPI) protocols in M-CMTS applications
  • A high-performance, integrated solution for downstream transmission for data, video, and telephony applications over cable HFC networks
  • Eight independent channels per package enable high-density equipment designs, reducing equipment floor space requirements