Product details

Function Equalizer, Transceiver Protocols CML Number of transmitters 4 Number of receivers 4 Supply voltage (V) 3.3 Signaling rate (Mbps) 4250 Input signal CML Output signal CML Rating Catalog Operating temperature range (C) -40 to 85
Function Equalizer, Transceiver Protocols CML Number of transmitters 4 Number of receivers 4 Supply voltage (V) 3.3 Signaling rate (Mbps) 4250 Input signal CML Output signal CML Rating Catalog Operating temperature range (C) -40 to 85
WQFN (NKA) 60 81 mm² 9 x 9
  • 250 Mbps – 4.25 Gbps Fully Differential Data Paths
  • Optional Fixed Input Equalization
  • Selectable Output De-emphasis
  • Individual Loopback Controls
  • On-Chip Termination
  • Lead-less WQFN-60 Pin Package (9 mm x 9 mm x 0.8 mm, 0.5 mm Pitch)
  • −40°C to +85°C Industrial Temperature Range
  • 6 kV ESD Rating, HBM

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  • 250 Mbps – 4.25 Gbps Fully Differential Data Paths
  • Optional Fixed Input Equalization
  • Selectable Output De-emphasis
  • Individual Loopback Controls
  • On-Chip Termination
  • Lead-less WQFN-60 Pin Package (9 mm x 9 mm x 0.8 mm, 0.5 mm Pitch)
  • −40°C to +85°C Industrial Temperature Range
  • 6 kV ESD Rating, HBM

All trademarks are the property of their respective owners.

The DS42BR400 is a quad 250 Mbps – 4.25 Gbps CML transceiver, or 8-channel buffer, for use in backplane and cable applications. With operation down to 250 Mbps, the DS42BR400 can be used in applications requiring both low and high frequency data rates. Each input stage has a fixed equalizer to reduce ISI distortion from board traces. The equalizers are grouped in fours and are enabled through two control pins. These control pins provide customers flexibility where ISI distortion may vary from one direction to another.

All output drivers have four selectable steps of de-emphasis to compensate against transmission loss across long FR4 backplanes. The de-emphasis blocks are also grouped in fours. In addition, the DS42BR400 also has loopback control capability on four channels. All CML drivers have 50Ω termination to VCC. All receivers are internally terminated with differential 100Ω.

The DS42BR400 is a quad 250 Mbps – 4.25 Gbps CML transceiver, or 8-channel buffer, for use in backplane and cable applications. With operation down to 250 Mbps, the DS42BR400 can be used in applications requiring both low and high frequency data rates. Each input stage has a fixed equalizer to reduce ISI distortion from board traces. The equalizers are grouped in fours and are enabled through two control pins. These control pins provide customers flexibility where ISI distortion may vary from one direction to another.

All output drivers have four selectable steps of de-emphasis to compensate against transmission loss across long FR4 backplanes. The de-emphasis blocks are also grouped in fours. In addition, the DS42BR400 also has loopback control capability on four channels. All CML drivers have 50Ω termination to VCC. All receivers are internally terminated with differential 100Ω.

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Type Title Date
* Data sheet DS42BR400 Quad 4.25Gbps CML Transcvr w/Transmit De-Emphasis & Recve Equal datasheet (Rev. J) 15 Apr 2013
Application note Driving Signals Over XAUI Backplanes Using DS42MB100, DS40MB200, or DS42BR400 (Rev. B) 26 Apr 2013

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