Products > Integrated Circuits (ICs) > Communication & Networking ICs > BCM81381A0KFSBG
  • BCM81381A0KFSBG

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Dual 100GbE CAUI4-to-CAUI4 PHY/Octal 25G Retimer

  • Package/Case :
  • BGA
  • Product Categories :
  • Optical PHYs
  • RoHs Status:
  • Lead free / RoHS Compliant
  • In-stock:
  • 50


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BCM81381A0KFSBG Product Details

The BCM81381A0KFSBG is a low-power, low-latency PHY integrating retimer and equalizer functions that support 100-Gigabit Ethernet (GbE), 40GbE, 25GbEand 10GbE applications.In 100G mode, the BCM81381A0KFSBG supports two full-duplex 100G ports (CAUI4-to-CAUI4) for SR4, LR4, and copper CR4 CFP2/CFP4/QSFP2 line-card applications.In 40G mode, the BCM81381A0KFSBG supports two full-duplex 40GbE ports (XLPPI-to-XLAUI) for SR4, LR4, and copper CR4 QSFP+ line-card applications.In 25G/10G mode, the BCM81381A0KFSBG supports 8x25GbE/10GbE ports for SR, LR, and copper CR/KRapplications.On-chip clock synthesis is performed by a low-cost 156.25 MHz reference clock (for all IEEE Standard 10G/40G/100G rates) 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 BCM82381 was designed in 28nm CMOS technology to provide a low-power, low-latency solution with integrated AC coupling capacitors for direct interfacing to Broadcom’s switch products. The BCM82381 is available in a 19mm x 19mm, 324-pin BGA, RoHS-compliant package.


  • Dual 100GE PHY supports CR4/SR4/LR4
  • Clause 92 100G-CR4 transmit training
  • Clause 91 100G FEC, bypassable
  • Clause 85 40G-CR4 transmit training
  • 25GbE mode with eight independent 25GBase-CR/SR/KR (per IEEE 802.3by) or 25GBase-CR1/KR1 (per 25G consortium specification)
  • 50GbE mode with 50GBase-KR2 to 50GBase-CR2/KR2 (per 25G consortium specification)
  • Support an intermix of 10GbE and 25GbE operations per lane across all eight lanes
  • Low-speed CFP2/CFP4/QSFP2/QSFP+ Data I/O
  • Low Power 16nm CMOS design
  • High performance receive equalization >35dB channel loss
  • 19x19mm BGA package, 1mm ball pitch


  • Blade servers
  • Enterprise LAN switching
  • Line cards
  • Routers
  • Servers
  • Switches
  • Top-of-Rack switches

Technical Parameters

  • PHY Type
  • 100GE
  • Lifecycle
  • Active
  • Distrib. Inventory
  • No

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Estimated Delivery Time: Aug 08 - Aug 13 days (choose Expedited at checkout).

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    We have rich products, can meet your various needs.

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    Minimum order quantity starts from 1pcs.

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    Lowest international shipping fee starts from US$2.00.

  • 90 days quality guarantee for all products.

    90 days quality guarantee for all products.


  • Step1:Product

    Step1: Products

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All the products will packing in anti-staticbag. Ship with ESD antistatic protection.

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We will inspect all the goods before shipment,ensure all the products at good condition and ensure the parts are new originalmatch datasheet.

After all the goods are ensure no problems afterpacking, we will packing safely and send by global express. It exhibitsexcellent puncture and tear resistance along with good seal integrity.

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1.We provide 90 days warranty.

2.If some of the items you received aren't of perfect quality, we would resiponsibly arrange your refund or replacement. But the items must remain their orginal condition.


Q: How does Jotrin guarantee that BCM81381A0KFSBG is the original manufacturer or agent of BROADCOM?
We have a professional business development department to strictly test and verify the qualifications of BROADCOM original manufacturers and agents. All BROADCOM suppliers must pass the qualification review before they can publish their BCM81381A0KFSBG devices; we pay more attention to the channels and quality of BCM81381A0KFSBG products than any other customer. We strictly implement supplier audits, so you can purchase with confidence.
Q: How to find the detailed information of BCM81381A0KFSBG chips? Including BROADCOM original factory information, Optical PHYs application, BCM81381A0KFSBG pictures?
You can use Jotrin's intelligent search engine, or filter by Optical PHYs category, or find it through Broadcom Corporation Information page.
Q: Are the BROADCOM's BCM81381A0KFSBG price and stock displayed on the platform accurate?
The BROADCOM's inventory fluctuates greatly and cannot be updated in time, it will be updated periodically within 24 hours. After submitting an order for BCM81381A0KFSBG, it is recommended to confirm the order with Jotrin salesperson or online customer service before payment.
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Q: What is the process for returns or replacement of BCM81381A0KFSBG?
All goods will implement Pre-Shipment Inspection (PSI), selected at random from all batches of your order to do a systematic inspection before arranging the shipment. If there is something wrong with the BCM81381A0KFSBG we delivered, we will accept the replacement or return of the BCM81381A0KFSBG only when all of the below conditions are fulfilled:
(1)Such as a deficiency in quantity, delivery of wrong items, and apparent external defects (breakage and rust, etc.), and we acknowledge such problems.
(2)We are informed of the defect described above within 90 days after the delivery of BCM81381A0KFSBG.
(3)The BCM81381A0KFSBG is unused and only in the original unpacked packaging.
Two processes to return the products:
(1)Inform us within 90 days
(2)Obtain Requesting Return Authorizations
More details about return electronic components please see our Return & Change Policy.
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Broadcom Corporation

Broadcom Corporation is a leading provider of highly integrated semiconductor solutions for broadband communications and networking of voice, video and data services. The company designs, develops and supplies complete system-on-chip (SoC) solutions using digital, analog and radio frequency (RF) tec...

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