Semtech GS3241

3G-SDI Reclocking Adaptive Cable Equalizer

The GS3241 is a low-power, multi-rate re-timing Cable Equalizer supporting rates up to 3G HD-SDI. It is designed to equalize and restore signals received over 200m coaxial cable at 3G, compensate for DC content of SMPTE pathological signals, and re-time the incoming data. The device supports ST 424 (3G SDI), ST 292-1 (HD-SDI), and ST 259 (SD-SDI) signals and is optimized for performance at 2.97Gb/s. In addition to standard SMPTE rates, the device also supports re-timing of DVB-ASI at 270Mb/s and MADI at 125Mb/s.

The two trace drivers have highly configurable pre-emphasis and swing controls to compensate for long trace and connector losses.

Features

• 75Ω cable input interface with on-chip termination
• SMPTE ST 424, ST 292-1 and ST 259 compliant input/output
• Multi-standard operation from 1Mb/s to 2.97Gb/s
• In addition to standard SMPTE rates, the device also supports re-timing of DVB-ASI at 270Mb/s, and MADI at 125Mb/s
• 3D Input Signal Eye Monitor
• PRBS generator and checker
• Automatic cable equalization—typical equalized cable lengths of Belden 1694A cable:
  • 190m at 2.97Gb/s
  • 260m at 1.485Gb/s
  • 450m at 270Mb/s and 125Mb/s
• Cable equalizer features:
  • Automatic power down on loss of signal
  • Programmable carrier detect with squelch threshold adjustment
  • Programmable launch swing compensation for non-compliant source
  • Manual and automatic cable equalizer bypass
• Trace driver features:
  • Integrated 100Ω, differential output termination
  • E×tends output DC-coupling support with 1.2V to 2.5V output supply range
  • Trace driver data output pre-emphasis to compensate for up to 60” FR4 at 2.97Gb/s
  • Manual or automatic re-timer bypass
  • Manual or automatic mute or disable on LOS
• CDR features:
  • Manual or automatic rate modes
  • Wide Loop bandwidth control
  • Re-timing at the following data rates: 125Mb/s, 270Mb/s, 1.485Gb/s, and 2.97Gb/s—this includes the f/1.001 rates
• Additional Features:
  • Single 1.8V power supply for analog and digital core
  • GSPI serial control and monitoring interface
  • Four configurable GPIO pins for control or status monitoring
  • Wide operating temperature range: -40°C to +85°C
  • Small 6mm × 4mm 40-pin QFN
  • Pb-free/Halogen-free/RoHS and WEEE compliant package
  • Pin compatible with the GS12141, GS12142, and GS12241

Applications

SMPTE ST 424, SMPTE ST 292, SMPTE ST 259 and AES10 coaxial cable serial digital interfaces.