Key Features

• 75Ω cable input interface with on-chip termination

• SMPTE ST 2082-1, ST 2081-1, ST 424, ST 292-1 and ST 259

compliant input/output

• Multi-standard operation from 1Mb/s to 11.88Gb/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:

 80m at 11.88Gb/s

 100m at 5.94Gb/s

 190m at 2.97Gb/s

 260m at 1.485Gb/s

 450m at 270Mb/s and 125Mb/s

• Cable equalizer mode 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

 Extends output DC-coupling support with 1.2V to 2.5V

output supply range

 Trace driver data output pre-emphasis to compensate for

up to 20” FR4 at 11.88Gb/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, 2.97Gb/s, 5.94Gb/s, and 11.88Gb/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: -40ºC to +85ºC

• Small 6mm x 4mm 40-pin QFN

• Pin compatible with the GS12141, GS12142, and GS3241

• Pb-free/Halogen-free/RoHS and WEEE compliant package

Applications

Next Generation 12G UHD-SDI infrastructures designed to

support UHDTV1, UHDTV2, 4K D-Cinema and 3D HFR and HDR

production image formats. Typical applications: Monitors,

Switchers, Distribution Amplifiers and Routers.

Description

The GS12241 is a low-power, multi-rate re-timing Cable Equalizer

supporting rates up to 12G UHD-SDI. It is designed to equalize and

restore signals received over 80m coaxial cable at 12G,

compensate for DC content of SMPTE pathological signals, and

re-time the incoming data.

The integrated eye monitor provides non-disruptive mission

mode analysis of the post equalized input signal. The 256x128

resolution scan matrix allows accurate signal analysis to speed up

prototyping and enable field analysis.

Built in macros enable customizable cross section analysis and

quick horizontal and vertical eye opening measurements.

With high phase consistency between scans and configurable

space and time thresholds, algorithms can be deployed in the

field to analyse long term signal quality variation (Bathtub Plot) to

reduce costly system installation debug time for intermittent

errors.

The two independently controlled trace drivers feature highly

configurable pre-emphasis and swing controls to compensate for

long trace and connector losses. The pre-emphasis pulse width

can be optimized to compensate for perturbations to frequency

response of transmission lines due to vias connectors and stubs.

The GS12241 is pin compatible with the GS12141 single input and

the GS12142 dual input 12G UHD-SDI Multi-rate Re-timing Cable

Equalizers, as well as the GS3241 3G SDI Multi-rate Re-timing

Cable Equalizer.

Note: For the GS12241 to be pin compatible with the GS12142,

careful design considerations are required. Contact for your local

Semtech FAE for details.