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.