1FEATURES
2• 0.6–2.5 Gbps Low Jitter Operation
• Fixed Input Equalization
• Programmable Output Pre-Emphasis
• Independent Switch and Line Side Pre-
Emphasis Controls
• Programmable Switch-Side Loopback Modes
• On-Chip Terminations
• HBM ESD Rating 6 kV on All Pins
• +3.3V Supply
• Lead-Less WQFN-48 Package (7mm x 7mm x
0.8mm, 0.5mm Pitch)
-40°C to +85°C Operating Temperature Range

APPLICATIONS
• Backplane or Cable Driver
• Redundancy and Signal Conditioning

DESCRIPTION
The DS25MB200 is a dual signal conditioning 2:1
multiplexer and 1:2 fan-out buffer designed for use in
backplane redundancy applications. Signal
conditioning features include input equalization and
programmable output pre-emphasis that enable data
communication in FR4 backplanes up to 2.5 Gbps.
Each input stage has a fixed equalizer to reduce ISI
distortion from board traces. All output drivers have 4
selectable steps of pre-emphasis to compensate for
transmission losses from long FR4 backplanes and
reduce 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 100Ω differential terminating
resistors. All drivers are internally terminated with
50Ω to VCC.