National Semiconductor DS10CP154EVK NOPB Manuale utente
September 2007
Rev. 0.1
1.5 Gbps 4x4 LVDS Crosspoint
Switch
DS10CP154 Evaluation Kit
USER MANUAL
Part Number: DS10CP154EVK NOPB
For the latest documents concerning these products and evaluation kit, visit lvds.national.com.
Schematics and gerber files are also available at lvds.national.com.
DS10CP154EVK User Manual
Table of Contents
Table of Contents..................................................................................................................... 2
Overview................................................................................................................................... 3
Description................................................................................................................................ 4
Evaluation................................................................................................................................. 5
Switch Configuration Truth Tables........................................................................................... 6
Typical Performance ................................................................................................................ 7
Page 2 of 7
DS10CP154EVK User Manual
Overview
The DS10CP154EVK is an evaluation kit designed for demonstrating performance of
DS10CP154, a 1.5 Gbps 4x4 LVDS Crosspoint Switch. The evaluation kit is comprised of the
DS10CP154 with its associated input and output SMA connectors and jumpers to manually
configure the switch.
The purpose of this document is to familiarize the user with the DS10CP154EVK, to suggest test
setup procedures and instrumentation to test the device optimally, and to guide the user through
some typical measurements that demonstrate the performance of the DS10CP154 in typical
applications.
Figure 1. Photo of the DS10CP154EVK
Page 3 of 7
DS10CP154EVK User Manual
Description
Figure 2 shows the top layer drawing of the PCB with the silkscreen annotations. The 5.25 by
5.25 inch, four-layer PCB is designed to evaluate the functions of the DS10CP154.
ADR0
ADR1
ADR2
ADR3
S00
S01
S10
S11
S20
S21
S31
S30
SDA
SCL
Figure 2. Top Layer DS10CP154EVK
Page 4 of 7
DS10CP154EVK User Manual
Evaluation
This section provides recommended test setup procedure for the device evaluation. Figure 3
depicts a typical setup and instrumentation you may use for the device evaluation.
1. Configure the test setup as shown in Figure 3.
2. Set the desired INn to OUTn drivers by selecting S00, S01, S10, S11, S20, S21, S30 and
S31 according to Tables 1 – 4.
3. Apply + supply (3.3V typical) to the VDD and – supply (ground) to the VSS connectors.
4. Set the PWDN* pin (J17) to a high state.
5. Connect a signal source (signal generator, data source, or an LVDS driver) to the desired
INn inputs on the board and adjust the signal parameters (VOH, VOL, VCM) so that they
comply with the device input recommendations.
6. Connect an oscilloscope to the selected OUTn outputs and view the output signals with
an oscilloscope with the analog bandwidth of at least 5 GHz.
Figure 3. DS10CP154 Test Setup Example
Page 5 of 7
DS10CP154EVK User Manual
Switch Configuration Truth Tables
S01 S00 Input Selected
0 0 IN0
0 1 IN1
1 0 IN2
1 1 IN3
Table 1. Input Select Pins Configuration for the Output OUT0
S11 S10 Input Selected
0 0 IN0
0 1 IN1
1 0 IN2
1 1 IN3
Table 2. Input Select Pins Configuration for the Output OUT1
S21 S20 Input Selected
0 0 IN0
0 1 IN1
1 0 IN2
1 1 IN3
Table 3. Input Select Pins Configuration for the Output OUT2
S31 S30 Input Selected
0 0 IN0
0 1 IN1
1 0 IN2
1 1 IN3
Table 4. Input Select Pins Configuration for the Output OUT3
Page 6 of 7
DS10CP154EVK User Manual
Typical Performance
This section of the User Manual shows a typical eye diagram you can expect to see when
evaluating the DS10BR150EVK.
Figure 4. DS10CP154 1.5 Gbps NRZ PRBS-7 Output Eye Diagram
Page 7 of 7
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