1 Features

1• Supports ST 424 (3G), 292 (HD), and 259 (SD)

• Data Rates up to 2.97 Gbps

• Supports DVB-ASI at 270 Mbps

• Cable Detect on Output

• Loss of Signal Detect at Input

• Output Driver Power-Down Control

• Typical Power Consumption: 130 mW in SD Mode

and 155 mW in HD Mode

• Typical Power Consumption of the Power-Save

Mode: 4 mW

• Single 3.3-V Supply Operation

• 75-Ω Single-Ended Outputs

• 100-Ω Differential Input

• Selectable Slew Rate

• Industrial Temperature Range: −40°C to 85°C

• 16-Pin WQFN Package

• Footprint Compatible With the LMH0302

2 Applications

• ST 424, ST 292, ST 344, and ST 259 Serial

Digital Interfaces

• Digital Video Routers and Switches

• Distribution Amplifiers

3 Description

The LMH0303 device is designed for use in ST 424,

ST 292, ST 344, and ST 259 serial digital video

applications. The LMH0303 drives 75-Ω transmission

lines (Belden 1694A, Belden 8281, or equivalent) at

data rates up to 2.97 Gbps.

The LMH0303 includes intelligent sensing capabilities

to improve system diagnostics. The cable detect

feature senses near-end termination to determine if a

cable is correctly attached to the output BNC. Input

loss of signal (LOS) detects the presence of a valid

signal at the input of the cable driver. These sensing

features may be used to alert the user of a system

fault and activate a deep power-save mode, reducing

the power consumption of the cable driver to 4 mW.

These features are accessible through an SMBus

interface.

The LMH0303 provides two selectable slew rates for

ST 259 and ST 424 or 292. The output amplitude is

adjustable ±10% in 5-mV steps through the SMBus.

The LMH0303 is powered from a single 3.3-V supply.

Power consumption is typically 130 mW in SD mode

and 155 mW in HD mode. The LMH0303 is available

in a 16-pin WQFN package.