1 Features
1• Compliant With ST 424, ST 292, ST 344, and ST
259(1)
• Supports DVB-ASI at 270 Mbps
• Wide Range of Data Rates: 125 Mbps to 2.97
Gbps
• Equalizes up to 120 Meters of Belden 1694A at
2.97 Gbps, up to 140 Meters of Belden 1694A at
1.485 Gbps, or up to 400 Meters of Belden 1694A
at 270 Mbps
• Equalizes up to 120m of Belden 1694A at 2.97
Gbps With 0.3 UI Maximum Output Jitter
• Manual Bypass and Output Mute With a
Programmable Threshold
• Single-Ended or Differential Input
• 50-Ω Differential Outputs (Internal 50-Ω Pullups)
• Single 3.3-V Supply Operation
• 280-mW Typical Power Consumption
• 16-Pin WQFN or 25-Ball CS-BGA Package
• Industrial Temperature Range: −40°C to +85°C
• HBM ESD Rating: 8 kV
• WQFN Version Footprint Compatible With the
LMH0044, LMH0384, and LMH0074
• Replaces the Semtech GS2974A or GS2974B

2 Applications
• ST 424, ST 292, ST 344, and ST 259 Serial
Digital Interfaces(1)
• Serial Digital Data Equalization and Reception
• Data Recovery Equalization

3 Description
The LMH0344 3-Gbps HD – SD SDI Adaptive Cable
Equalizer is designed to equalize 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 2.97 Gbps and
supports ST 424, ST 292, ST 344, and ST 259.
The LMH0344 device implements DC restoration to
correctly handle pathological data conditions. The
equalizer may be driven in either a single-ended or
differential configuration.
Additional features include separate carrier detect
and output mute pins which may be tied together to
mute the output when no signal is present. A programmable mute reference is provided to mute the
output at a selectable level of signal degradation.
For applications using the 4:4:4:4 10 bits video
format, the LMH0394 cable equalizer will provide
better performance.
The device is available in two space–saving
packages: a 4-mm × 4-mm 16-pin WQFN and even
more space-efficient 3-mm × 3-mm 25-ball CS-BGA
package.