GS3281 3G-SDI Re-timing Cable Driver Small 6mm x 4mm 40-pin QFN Key Features Pb-free/Halogen-free/RoHS and WEEE compliant Dual non-inverted 75 cable interface with on-chip package termination Pin compatible with the GS12181, GS12182, GS12081, SMPTE ST 424, ST 292-1 and ST 259 compliant and GS12281 input/output Multi-standard operation from 1Mb/s to 2.97Gb/s Applications In addition to standard SMPTE rates, the device also SMPTE ST 424, SMPTE ST 292, SMPTE ST 259 interfaces supports re-timing of DVB-ASI at 270Mb/s, and MADI requiring cable driving functionality. Typical applications: at 125Mb/s. Cameras, Switchers, Distribution Amplifiers and Routers. Cable driver features: Wide swing control Description Pre-emphasis to compensate for significant The GS3281 is a low-power, multi-rate, re-timing cable insertion loss between device output and BNC driver supporting rates up to 3G-SDI. It is designed to Automatic/manual output slew rate control receive 100 differential input signals, automatically Manual or automatic re-timer bypass recover the embedded clock from the digital video signal and re-time the incoming data, and transmit the re-timed Manual or automatic Mute or disable on LOS signal over 75 coaxial cables. The 100 trace input Trace equalizer features: supports up to 17dB of insertion loss. Integrated 100, differential input termination The integrated eye monitor provides non-disruptive Automatic power down on loss of signal mission mode analysis of the post equalized input signal. The 256x128 resolution scan matrix allows accurate signal Adjustable carrier detect threshold analysis to speed up prototyping and enable field analysis. DC-coupling from 1.2V to 2.5V CML logic Built in macros enable customizable cross section analysis Trace equalization to compensate for up to 60 FR4 and quick horizontal and vertical eye opening at 2.97Gb/s measurements. Automatic input offset compensation With high phase consistency between scans and configurable space and time thresholds, algorithms can be CDR features: deployed in the field to analyze long term signal quality Manual or automatic rate modes variation (Bathtub Plot) to reduce costly system installation Wide Loop bandwidth control debug time for intermittent errors. The two cable drivers have highly configurable pre-emphasis and swing controls Re-timing at the following data rates: 125Mb/s, to compensate for long trace and connector losses. 270Mb/s, 1.485Gb/s, and 2.97Gb/s. This includes the Additionally, automatic and user selectable output slew f/1.001 rates. rate control is provided for each cable driver output. The GS3281 is pin compatible with the GS12181 and Additional Features GS12281 single input, and the GS12182 dual input 12G Single 1.8V power supply for analog and digital core UHD-SDI Multi-rate Re-timing Cable Drivers, as well as the GS12081 12G UHD-SDI Multi-rate Cable Driver. 2.5V or 3.3V for cable driver output supply Note: For the GS3281 to be pin compatible with the GSPI serial control and monitoring interface GS12182, careful design considerations are required. Four configurable GPIO pins for control or status Contact for your local Semtech FAE for details. monitoring Wide operating temperature range: -40C to +85C GS3281 1 of 97 www.semtech.com Final Data Sheet Rev.7 Semtech PDS-061453 January 2019 Proprietary & ConfidentialSDOUT GPIO1 GPIO2 GPIO3 GPIO4 CS SCLK SDIN Control & Status SDO0 Cable Driver Signal Selector PRBS Generator Data: (Retime/Bypass) SDO0 PRBS Generator Swing and Pre-emphasis Control Trace Equalizer DDI CDR SDO1 Cable Driver Signal Selector Data: (Retime/Bypass) PRBS SDO1 Checker PRBS Generator Swing and Pre-emphasis Control EYE Monitor GS3281 Functional Block Diagram GS3281 2 of 97 www.semtech.com Final Data Sheet Rev.7 Semtech Proprietary & Confidential PDS-061453 January 2019 Slicer