6.5G 4x4 Crosspoint

Mindspeed's M21451 four channel 6.5 Gbps backplane signal conditioner features a small form factor, low power device that enables data transmission over long backplanes at speeds up to 6.5 Gbps. Mindspeed's Amplif-Eye™ signal conditioning technology enables transmission of 6.5 Gbps data to distances up to one meter while also traversing two backplane connectors. The M21451 is specifically designed to operate in environments that suffer from both loss and reflection. The device channel features an independent equalizer and driver with programmable output swing and de-emphasis to maximize power efficiency. Virtually any digital protocol can be transmitted through the device at speeds from 50 Mbps to 6.5 Gbps. The list of supported protocols includes: PCI Express, SATA, SAS, Infiniband, 2 x XAUI and Fibre Channel. Mindspeed's M21451 backplane signal conditioner is designed to recognize and transparently relay out-of-band (OOB) signals for SATA/SAS and PCI Express. The device includes fully non-blocking switch matrices that allow for simple switching as well as multi-cast functionality. Matrices can also be configured as failover switches. The devices operate from -40° to +85°C and can either be configured via a 2 wire interface, EPROM or via hardware.

Product Specifications

Part Number
6.5G 4x4 Crosspoint
Max Data Rate(Gbps)
Number of Channels
Embedded CDR
Package Size


  • Fully non-blocking switch matrices
  • Data rate independent
  • Extended temperature range (-40° to 85° C)
  • 1.2 Volt core / optional 1.2, 1.8 or 2.5 Volt IO
  • Protocol agnostic
  • Out of band signaling support
  • Small QFN packages
  • Low 120 mW per channel power usage
  • 24 dB equalization and 6 dB of de-emphasis available

Technical Resources

Data Sheet

Product Briefs

Order from MACOM

6.5 Gbps, 4x4 Crosspoint EVM
.6.5 Gbps, 4x4 Crosspoint -RoHS IC