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1FEATURES

2? DC - 3.125 Gbps Low Jitter, High Noise

Immunity, Low Power Operation

? Receive Equalization Reduces ISI Jitter Due to

Media Loss

? Transmit Pre-Emphasis Drives Lossy

Backplanes and Cables

? On-Chip 100Ω Input and Output Termination:

– Minimizes Insertion and Return Losses

– Reduces Component Count

– Minimizes Board Space

? DS25BR101 Eliminates On-Chip Input

Termination for Added Design Flexibility

? 7 kV ESD on LVDS I/O Pins Protects Adjoining

Components

? Small 3 mm x 3 mm WSON-8 Space Saving

Package

APPLICATIONS

? Clock and Data Buffering

? Metallic Cable Driving and Equalization

? FR-4 Equalization

DESCRIPTION

The DS25BR100 and DS25BR101 are single channel

3.125 Gbps LVDS buffers optimized for high-speed

signal transmission over lossy FR-4 printed circuit

board backplanes and balanced metallic cables. Fully

differential signal paths ensure exceptional signal

integrity and noise immunity.

The DS25BR100 and DS25BR101 feature transmit

pre-emphasis (PE) and receive equalization (EQ),

making them ideal for use as a repeater device.

Other LVDS devices with similar IO characteristics include the following products. The DS25BR120

features four levels of pre-emphasis for use as an

optimized driver device, while the DS25BR110

features four levels of equalization for use as an

optimized receiver device. The DS25BR150 is a

buffer/repeater with the lowest power consumption

and does not feature transmit pre-emphasis nor

receive equalization.

Wide input common mode range allows the receiver

to accept signals with LVDS, CML and LVPECL

levels; the output levels are LVDS. A very small

package footprint requires minimal space on the

board while the flow-through pinout allows easy board

layout. On the DS25BR100 the differential input and

output is internally terminated with a 100Ω resistor to

lower return losses, reduce component count and

further minimize board space. For added design

flexibility the 100Ω input terminations on the

DS25BR101 have been eliminated. This elimination

enables a designer to adjust the termination for

custom interconnect topologies and layout.