Dual 40-GbE/Octal 10-GbE QSFP+ XLPPI-to-XLAUI PHY

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Low-power, low-latency PHY integrating retimer and equalizer functions supporting 40 Gigabit Ethernet (GbE) and 10 GbE applications.
In 40G mode, the BCM84328 supports two full-duplex 40 GbE ports (XLPPI-to-XLAUI/KR4) for SR4, LR4 and copper CR4 QSFP+ line-card applications. In 10G mode, the BCM84328 supports eight full-duplex 10 GbE ports (SFI-to-XFI/KR) for SR, LR and copper CR SFP+ line-card applications. 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.


  • Dual 40G channels with two XLPPI-to-XLAUI/KR4 ports supporting SR4/LR4/CR4 QSFP+ retimer/equalization applications
  •  10G Mode with eight independent 10G/1G SFI-to-XFI/KR channels supporting SR/LR/CR SFP+ retimer/equalization applications. Supports intermix of 1G and 10G operations on a per-lane basis
  • Low-latency design
  • Low-power retimer/equalizer PHY (~300 mW per 10G bidirectional port)

Lifecycle Status


Specification Value
Lifecycle Active
Distrib. Inventory No
PHY Type 40GE
Product Brief27 i


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