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Contents
Read This First ................................................................................................................iii
About This Manual..................................................................................................... iii
How to Use This Manual ........................................................................................... iii
Related Documentation from Texas Instruments....................................................... iii
If You Need Assistance ............................................................................................. iii
FCC Warning............................................................................................................. iv
Contents ...........................................................................................................................v
Figures..............................................................................................................................v
Tables ..............................................................................................................................vi
1 Overview....................................................................................................................1-1
1.1
Sample Functional Configurations ...................................................................1-2
1.2
Signal Paths ....................................................................................................1-4
2 Setup and Required Equipment ...............................................................................2-1
2.1
Applying an Input.............................................................................................2-1
2.2
Observing an Output........................................................................................2-4
2.3
Typical Test Results ........................................................................................2-4
3 EVM Construction .....................................................................................................3-1
3.1
Schematic........................................................................................................3-2
3.2
Board Layout Patterns .....................................................................................3-3
3.3
PCB Fabrication Requirements and Stack Up .................................................3-8
3.4
Bill of Materials ................................................................................................3-9
Figures
Figure 1-1. Sample Functional Configurations of the 4x4 Crosspoint Switch..........1-2
Figure 1-2. 4x4 Crosspoint Switch EVM ......................................................................1-3
Figure 1-3. 4x4 Crosspoint Switch Signal Paths.........................................................1-4
Figure 2-1. EVM Power Connections for Either SN65LVDS125A or SN65LVDS250
Evaluation. .............................................................................................................2-2
Figure 2-2. Termination for Interfacing LVDS, CML, or LVPECL Drivers ..................2-3
Figure 2-3. Typical Test Results...................................................................................2-5
Figure 3-1. 4x4 Crosspoint Switch EVM Schematic....................................................3-2
Figure 3-2. 4x4 Crosspoint Switch EVM Board Layout...............................................3-3
Figure 3-3. Layer 1–Signal Plane .................................................................................3-4
Figure 3-4. GND Plane...................................................................................................3-5
Figure 3-5. Layer 3–Vcc ................................................................................................3-5