Semtech GS3281

3G-SDI Reclocking Cable Driver

The GS3281 is a low-power, multi-rate, re-timing cable driver supporting rates up to 3G-SDI. It is designed to receive 100Ω differential input signals, automatically recover the embedded clock from the digital video signal and re-time the incoming data, and transmit the re-timed signal over 75Ω coaxial cables. The 100Ω trace input supports up to 17dB of insertion loss.The device supports SMPTE ST 424 (3G SDI), ST 292-1 (HD-SDI) and ST 259 (SD-SDI). 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 cable drivers have highly configurable pre-emphasis and swing controls to compensate for long trace and connector losses. Additionally, automatic and user selectable output slew rate control is provided for each cable driver output.

Features

• Dual non-inverted 75Ω cable 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.
• Cable driver features:
  • Wide swing control
  • Pre-emphasis to compensate for significant insertion loss between device output and BNC
  • Automatic/manual output slew rate control
  • Manual or automatic re-timer bypass
  • Manual or automatic Mute or disable on LOS
• Trace equalizer features:
  • Integrated 100Ω, differential input termination
  • Automatic power down on loss of signal
  • Adjustable carrier detect threshold
  • DC-coupling from 1.2V to 2.5V CML logic
  • Trace equalization to compensate for up to 60” FR4 at 2.97Gb/s
  • Automatic input offset compensation
• 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
  • 2.5V or 3.3V for cable driver output supply
  • 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 GS12181, GS12182, GS12081, and GS12281

Applications

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