DS25MB100TSQ/NOPB ,2.5 Gbps 2:1/1:2 CML Mux/Buffer with Transmit Pre-Emphasis and Receive Equalization 36-WQFN -40 to 85(1)Pin Functions (continued)PIN(2)TYPE DESCRIPTIONNAME NO.DES_0 and DES_1 select the output pre-emp ..
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DS25MB100TSQ/NOPB
2.5 Gbps 2:1/1:2 CML Mux/Buffer with Transmit Pre-Emphasis and Receive Equalization
DE_S
MUX
LB1
DE_S
Control
EQS
Line Side Switch Side
IN0 +-
IN1 +-
LB0
OUT0 +-
OUT1 +-
DE_L
emphasisPre-IN +
OUT +-
DE_L
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DS25MB100SNLS243H –SEPTEMBER 2006–REVISED MARCH 2016
DS25MB100 2.5 Gbps 2:1/1:2 CML Mux/Buffer With Transmit Pre-Emphasis and Receive
Equalization Features 2:1 Multiplexer and 1:2 Buffer 0.25-Gbpsto 2.5-Gbps Fully Differential Data
Paths Fixed Input Equalization Programmable Output Pre-Emphasis Independent Pre-Emphasis Controls Programmable Loopback Modes On-Chip Terminations ESD Ratingof 6-kV HBM 3.3-V Supply Low power, 0.45W Typical Lead-Less WQFN-36 Package −40°Cto +85°C Operating Temperature Range
Applications Backplane Driversor Cable Driver Redundancy and Signal Conditioning Applications CPRI/OBSAI
DescriptionThe DS25MB100 deviceisa signal conditioning 2:1
multiplexer and 1:2 fan-out buffer designed for usein
backplane-redundancyor cable driving applications.
Signal conditioning features include continuous time
linear equalization (CTLE) and programmable output
pre-emphasis that enable data communicationin FR4
backplane upto 2.5 Gbps. Each input stage hasa
fixed equalizerto reduce ISI distortion from board
traces.
All output drivers have four selectable levelsof pre-
emphasisto compensate for transmission losses from
long FR4 backplane or cable attenuation reducing
deterministic jitter. The pre-emphasis levels can be
independently controlled for the line-side and switch-
side drivers. The internal loopback paths from switch-
side input to switch-side output enable at-speed
system testing. All receiver inputs are internally
terminated with 100-Ω differential terminating
resistors. All driver outputs are internally terminated
with 50-Ω terminating resistorsto VCC.
Device Information(1)(1) Forall available packages, see the orderable addendumat
the endofthe data sheet.
Simplified Block Diagram
