Semtech GS3241
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.
Overview
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.