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. September 2007 Rev. 0.1 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 S10 S11 S20 S21 ADR0 ADR1 ADR2 ADR3 S30 S01 S31 S00 SCL SDA 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. 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 0 0 1 1 S00 0 1 0 1 Input Selected IN0 IN1 IN2 IN3 Table 1. Input Select Pins Configuration for the Output OUT0 S11 0 0 1 1 S10 0 1 0 1 Input Selected IN0 IN1 IN2 IN3 Table 2. Input Select Pins Configuration for the Output OUT1 S21 0 0 1 1 S20 0 1 0 1 Input Selected IN0 IN1 IN2 IN3 Table 3. Input Select Pins Configuration for the Output OUT2 S31 0 0 1 1 S30 0 1 0 1 Input Selected IN0 IN1 IN2 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