DS25BR440_15 Datasheet, PDF (1/21 Pages) Texas Instruments – 3.125 Gbps Quad LVDS Buffer with Transmit Pre-Emphasis and Receive Equalization

DS25BR440
www.ti.com
SNLS258B – FEBRUARY 2008 – REVISED MARCH 2013
DS25BR440 3.125 Gbps Quad LVDS Buffer with Transmit Pre-Emphasis and Receive
Equalization
Check for Samples: DS25BR440
FEATURES
1
•2 DC - 3.125 Gbps Low Jitter, Low Skew, Low
Power Operation
• Pin Selectable Transmit Pre-Emphasis and
Receive Equalization Eliminate Data
Dependant Jitter
• Wide Input Common Mode Voltage Range
Allows DC-Coupled Interface to LVDS, CML
and LVPECL Drivers
• LOS Circuitry Detects Open Inputs Fault
• Integrated 100Ω Input and Output
Terminations
• 8 kV ESD on LVDS I/O Pins Protects Adjoining
Components
• Small 6 mm x 6 mm WQFN-40 Space Saving
Package
APPLICATIONS
• Clock and Data Buffering and Repeating
• Copper Cable Driving and Equalization
• FR-4 Equalization
• OC-48 / STM-16
DESCRIPTION
The DS25BR440 is a 3.125 Gbps Quad LVDS buffer
optimized for high-speed signal routing and repeating
over lossy FR-4 printed circuit board backplanes and
balanced cables. Fully differential signal paths ensure
exceptional signal integrity and noise immunity.
The DS25BR440 features two levels of transmit pre-
emphasis (PE) and two levels of receive equalization
(EQ). Both of these features compensate for
interconnect losses and ultimately maximize noise
margin. A loss-of-signal (LOS) circuit monitors each
input channel and a unique LOS pin is asserted when
no signal is detected at that input.
Wide input common mode range allows the switch to
accept signals with LVDS, CML and LVPECL levels;
the output levels are LVDS. A very small package
footprint requires a minimal space on the board while
the flow-through pinout allows easy board layout.
Each differential input and output is internally
terminated with a 100Ω resistor to lower device return
losses, reduce component count and further minimize
board space.
Typical Application
DS25BR440
Cable or Backplane
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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