1FEATURES
2• SMPTE 292M, SMPTE 344M and SMPTE 259M
Compliant
• Supports DVB-ASI at 270 Mbps
• Data Rates: 125 Mbps to 1.485 Gbps
• Equalizes up to 200 Meters of Belden 1694A at
1.485 Gbps or up to 400 Meters of Belden
1694A at 270 Mbps
• Manual Bypass, Cable Length Indicator, and
Output Mute with a Programmable Threshold
• Single-Ended or Differential Input
• 50Ω Differential Outputs
• Single 3.3V Supply Operation
• 208 mW Typical Power Consumption with 3.3V
Supply
• Replaces the GS1524 and GS1524A

APPLICATIONS
• SMPTE 292M, SMPTE 344M, and SMPTE 259M
Serial Digital Interfaces
• Serial Digital Data Equalization and Reception
• Data Recovery Equalization

DESCRIPTION
The LMH0034 SMPTE 292M / 259M adaptive cable
equalizer is a monolithic integrated circuit for
equalizing data transmitted over cable (or any media
with similar dispersive loss characteristics). The
equalizer operates over a wide range of data rates
from 125 Mbps to 1.485 Gbps and supports SMPTE
292M, SMPTE 344M and SMPTE 259M.
The LMH0034 implements DC restoration to correctly
handle pathological data conditions. DC restoration
can be bypassed for low data rate applications. The
equalizer is flexible in allowing either single-ended or
differential input drive.
Additional features include a combined carrier detect
and output mute pin which mutes the output when no
signal is present. A programmable mute reference is
used to mute the output at a selectable level of signal
degradation. A cable length indicator is provided to
determine the amount of cable being equalized.