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.