DS25BR204_14 Datasheet, PDF (1/18 Pages) Texas Instruments – 3.125 Gbps 1:4 LVDS Repeater with Transmit Pre-Emphasis and Receive Equalization

DS25BR204
www.ti.com
SNLS259C – NOVEMBER 2007 – REVISED MAY 2011
DS25BR204 3.125 Gbps 1:4 LVDS Repeater with Transmit Pre-Emphasis and Receive
Equalization
Check for Samples: DS25BR204
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 Range allows DC-
coupled interface to LVDS, CML and LVPECL
drivers
• Redundant inputs
• Integrated 100Ω input and output terminations
• 8 kV ESD on LVDS I/O pins protects adjoining
components
• Small 6 mm x 6 mm LLP-40 space saving
package
APPLICATIONS
• Clock and data distribution
• Clock and data buffering and muxing
• OC-48 / STM-16
• SD/HD/3GHD SDI Routers
DESCRIPTION
The DS25BR204 is a 3.125 Gbps 1:4 LVDS repeater optimized for high-speed signal routing and switching over
lossy FR-4 printed circuit board backplanes and balanced cables. Fully differential signal paths ensure
exceptional signal integrity and noise immunity.
The device has two different LVDS input channels and a select line determines which input is active. Both inputs
have programmable equalization providing maximum signal strength. A loss-of-signal (LOS) circuit monitors both
input channels and a unique LOS pin reports 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
CARD A
CARD C
ASIC/FPGA
Discrete
Serializer
DS25BR204
1:4 LVDS
Repeater
ASIC/FPGA 1
ASIC/FPGA 2
Discrete
Deserializer 1
Discrete
Deserializer 2
CARD B
BACKPLANE
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
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.
Copyright © 2007–2011, Texas Instruments Incorporated