3.125 Gbps 2x2 LVDS Crosspoint Switch with Transmit Pre-emphasis and Receive Equalization DS25CP102 Evaluation Kit USER MANUAL Part Number: DS25CP102EVK 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. October 2007 Rev. 0.
DS25CP102EVK User Manual Table of Contents Table of Contents ..................................................................................................................... 2 Overview................................................................................................................................... 3 Description................................................................................................................................ 4 Evaluation....................................
DS25CP102EVK User Manual Overview The DS25CP102EVK is an evaluation kit designed for demonstrating performance of the DS25CP102, a 3.125 Gbps 2x2 LVDS Crosspoint Switch with transmit pre-emphasis and receive equalization. The evaluation kit is comprised of the DS25CP102 with its associated input and output SMA connectors and jumpers to manually configure the switch.
DS25CP102EVK User Manual Description Figure 2 shows the top layer drawing of the PCB with the silkscreen annotations. The 4.5 by 4.0 inch, four-layer PCB is designed to evaluate the functions of the DS25CP102. Figure 2.
DS25CP102EVK 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 and enable the desired INn to OUTn drivers by selecting SEL0, SEL1, EN0 and EN1 according to Tables 1 – 2. 3. Apply + supply (3.3V typical) to the VDD and – supply (ground) to the VSS connectors. 4.
DS25CP102EVK User Manual Switch Configuration Truth Tables SEL1 0 0 1 1 SEL0 0 1 0 1 OUT1 IN0 IN0 IN1 IN1 OUT0 IN0 IN1 IN0 IN1 Table 1. Switch Configuration Truth Table EN1 0 0 1 1 EN0 0 1 0 1 OUT1 Disabled Disabled Enabled Enabled OUT0 Disabled Enabled Disabled Enabled Table 2. Output Enable Truth Table OUTPUTS OUT0 and OUT1 CONTROL Pin PE State Pre-emphasis Level 0 OFF 1 ON Table 3.
DS25CP102EVK User Manual Typical Performance This section of the User Manual shows a typical eye diagram you can expect to see when evaluating the DS25CP102EVK. Figure 4. DS25CP102 3.
IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.
