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.