16nm Octal 56-Gb/s PAM-4 Duplex Backplane PHY

Currently Viewing:

*Certain versions of this device are not available for sale in Germany or shipment to or from Germany, and these versions should not be used in any product destined for the German market.
The Broadcom® BCM81330 is a single-chip, low-power Pulse Amplitude Modulation (PAM-4) PHY. It integrates equalizer and retimer functions, supporting eight full-duplex, 56-Gb/s ports for backplane applications. In the octal 56-Gb/s mode, the BCM81330 supports duplex 8× 56-Gb/s PAM-4 to 8× 56-Gb/s PAM-4 to drive Long Reach (LR) (30 dB) backplane in fabric/line cards.
The BCM81330 also supports multiple standard/line rate, including both PAM-4 and Non Return-to-Zero (NRZ). The BCM81330 provides forward error corrections (FECs) support. On-chip clock synthesis is performed by a single, low-cost 156.25 MHz reference clock via high-frequency, low-jitter phase-locked loops (PLLs). Individual clock recovery is performed on the device by synchronizing directly to the respective incoming data streams.
The BCM81330 is designed in 16-nm CMOS technology to provide a low-power solution with integrated AC-coupling capacitors. The BCM81330 is available in a 19-mm × 19-mm, 1.0-mm pitch, 324-ball BGA, RoHS-compliant package.


• Line-side interface supports backplane
channels (30-dB insertion loss) with high-performance receiver equalization
• Host-side interface compliant to the CEI-28G/56G-LR specifications supporting LR 30-dB channels
• Supports FEC, bypassable
• Supports multiple standard/line rates in both PAM-4 and NRZ
• Continuous auto-adaptive equalization
• Designed with low-power, 16-nm CMOS technology
• Line-side and host-side loopbacks
• Advanced diagnostics, including eye
monitoring feature with pseudorandom bit
sequence (PRBS) generator and checker
• Single, low-cost 156.25-MHz reference clock
• Interoperability with Broadcom ASIC and Merchant Switch Silicon
• 19-mm × 19-mm, 1.0-mm pitch, 324-ball
BGA, RoHS-compliant package


  • High density switch
  • 10G, 25G, 40G, 50G, 100G, 200G, and 400G line-card backplane applications.

Lifecycle Status


Specification Value
Lifecycle Active
Distrib. Inventory No
PHY Type 100GE
I/O Controller
Bus Interface
Transfer Rates
External Memory Interfaces

Product Brief1 i

If you are looking for older or archived product downloads, please use the documents and downloads search tool.

Specification1 i
Product Brief1 i