DS25CP104A Datasheet | (DS25CP104A / DS25CP114) 3.125 Gbps 4x4 LVDS Crosspoint Switch





(Datasheet) DS25CP104A Datasheet PDF Download

Part Number DS25CP104A
Description (DS25CP104A / DS25CP114) 3.125 Gbps 4x4 LVDS Crosspoint Switch
Manufacture National Semiconductor
Total Page 28 Pages
PDF Download Download DS25CP104A Datasheet PDF

Features: DS25CP104A / DS25CP114 3.125 Gbps 4x4 LV DS Crosspoint Switch with PE and EQ ww w.DataSheet4U.com May 13, 2009 DS25CP 104A / DS25CP114 3.125 Gbps 4x4 LVDS C rosspoint Switch with Transmit Pre-Emph asis and Receive Equalization General D escription The DS25CP104A and DS25CP114 are 3.125 Gbps 4x4 LVDS crosspoint swi tches optimized for high-speed signal r outing and switching over lossy FR-4 pr inted circuit board backplanes and bala nced cables. Fully differential signal paths ensure exceptional signal integri ty and noise immunity. The non-blocking architecture allows connections of any input to any output or outputs. The sw itch configuration can be accomplished via external pins or the System Managem ent Bus (SMBus) interface. The DS25CP10 4A and DS25CP114 feature four levels (O ff, Low, Medium, High) of transmit pre- emphasis (PE) and four levels (Off, Low , Medium, High) of receive equalization (EQ) settable via the SMBus interface. Off and Medium PE levels and Off and Low EQ levels are settabl.

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DS25CP104A / DS25CP114
May 13, 2009
3.125 Gbps 4x4 LVDS Crosspoint Switch with Transmit
Pre-Emphasis and Receive Equalization
General Description
The DS25CP104A and DS25CP114 are 3.125 Gbps 4x4
LVDS crosspoint switches 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 non-blocking architecture allows connections of any input
to any output or outputs. The switch configuration can be ac-
complished via external pins or the System Management Bus
(SMBus) interface.
The DS25CP104A and DS25CP114 feature four levels (Off,
Low, Medium, High) of transmit pre-emphasis (PE) and four
levels (Off, Low, Medium, High) of receive equalization (EQ)
settable via the SMBus interface. Off and Medium PE levels
and Off and Low EQ levels are settable with the external pins.
In addition, the SMBus circuitry enables the loss of signal
(LOS) monitors that can inform a system of the presence of
an open inputs condition (e.g. disconnected cable).
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. On the DS25CP104A each differential input and
output is internally terminated with a 100resistor to lower
return losses, reduce component count and further minimize
board space. For added design flexibility the 100input ter-
minations on the DS25CP114 have been eliminated. This
enables a designer to build custom crosspoint configurations
and distribution circuits that require a limited multidrop sig-
naling topology.
Features
DC - 3.125 Gbps low jitter, low skew, low power operation
Pin and SMBus configurable, fully differential, non-
blocking architecture
Pin (two levels) and SMBus (four levels) selectable pre-
emphasis and equalization eliminate ISI jitter
Wide Input Common Mode Range enables easy interface
to CML and LVPECL drivers
LOS circuitry detects open inputs fault condition
On-chip 100input and output termination minimizes
insertion and return losses, reduces component count and
minimizes board space. The DS25CP114 eliminates the
on-chip input termination for added design flexibility.
8 kV ESD on LVDS I/O pins protects adjoining
components
Small 6 mm x 6 mm LLP-40 space saving package
Applications
SD/HD/3G HD SDI Routers
OC-48 / STM-16
InfiniBand and FireWire
Typical Application
© 2009 National Semiconductor Corporation 300736
30073603
www.national.com

                    
                    






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