BCM8706
®
XAUI™ TO SERIAL 10G BASE-LRM TRANSCEIVER
FEATURES
SUMMARY OF BENEFITS
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Meets and exceeds industry standard
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IEEE 802.3ae
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IEEE802.3aq
High-performance mode supports 300m of MMF fiber.
Low-power mode supports 220m of MMF, as specified in the 802.3aq
standard.
Integrated AGC with a dynamic range of 60 mV–700 mV
Multiple interface support
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4 Lane XAUI™ (3.125 Gbps)
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XFP/XFI
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Programmable amplitude control on 10G serial transmitter
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PMD
- Serial 10.3125-Gbps CML
Receive equalization on XAUI and 10G serial interfaces
Power dissipation: < 1.5W (Low-power mode)
Core Supply: 1.0V; I/O: 3.3V
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MDIO interface compliant to IEEE 802.3ae Clause 45 with extended
indirect address register access
Single reference clock input, enables use of low-cost 25-MHz crystal
or 156.25-MHz oscillator.
Integrated micro-controller, no external memory required
Support for XENPAK/X2 3.0 and XPAK MSA Optical Module
standards and the emerging SFP+ standard
Simplifies manufacturability with integrated built-in self test (BIST)
and loopback modes on the 10-G serial and XAUI interfaces.
Standard I
2
C serial interface support for external E2 and XFP.
XAUI link synchronization/deskew
XGXS 8B/10B error detection ENDEC
PCS 64B/66B scrambler/descrambler
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• Reference clock output for XFP module reference clock
• Loss-of-signal detection
• Link activity indicator outputs
• XAUI transmit pre-emphasis for transmission over backplanes
APPLICATIONS
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XENPAK, X2 Modules for LRM
Direct attach to SFP+ modules
Network interface cards (NICs)
BCM8706 Functional Block Diagram
XAUI
OTX
RS
Media
Access
Controller
Interface
XGXS
10.3125
Gbps
BCM8706
MAC
MMF EDC
REFCLK
25M or
156.25M
ORX
MDC
Management
Interface
MDIO
I 2C
Optical PMD
E2