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1FEATURES

2? Supports SMPTE 424M, SMPTE 292M, and

SMPTE 259M (C) Serial Digital Video

Standards

? Supports 270 Mbps, 1.483 Gbps, 1.485 Gbps,

2.967 Gbps, and 2.97 Gbps Serial Data Rate DVBOperation

? Supports DVB-ASI at 270 Mbps

? Single 3.3V Supply Operation

? 370 mW Typical Power Consumption

? Two Differential, Reclocked Outputs

? Choice of Second Reclocked Output or Low-

Jitter, Differential, Data-Rate Clock Output

? Single 27 MHz External Crystal or Reference

Clock Input

? Manual or Automatic Rate Select Input

? SD/HD Operating Rate Indicator Output

? Lock Detect Indicator Output

? Output Mute Function for Data and Clock

? Auto/Manual Reclocker Bypass

? Differential LVPECL Compatible Serial Data

Inputs and Outputs

? LVCMOS Control Inputs and Indicator Outputs

? 20-Pin HTSSOP or 24-Pin WQFN Package

? Industrial Temperature Range: -40°C to +85°C

? Footprint Compatible With the LMH0046 and

LMH0026 (HTSSOP Package)

APPLICATIONS

? SDTV/HDTV and 3 Gbps Serial Digital Video

Interfaces for:

– Digital Video Routers and Switchers

– Digital Video Processing and Editing

Equipment

– DVB-ASI Equipment

– Video Standards and Format Converters

DESCRIPTION

The LMH0346 3 Gbps HD/SD SDI Reclocker retimes

serial digital video data conforming to the SMPTE

424M, SMPTE 292M, and SMPTE 259M (C)

standards. The LMH0346 operates at serial data

rates of 270 Mbps, 1.483 Gbps, 1.485 Gbps, 2.967

Gbps, and 2.97 Gbps. The LMH0346 supports DVBOperation

ASI operation at 270 Mbps.

The LMH0346 automatically detects the incoming

data rate and adjusts itself to retime the incoming

data to suppress accumulated jitter. The LMH0346

recovers the serial data-rate clock and optionally

provides it as an output. The LMH0346 has two

differential serial data outputs; the second output may

be selected as a low-jitter, data-rate clock output.

Controls and indicators are: serial clock or second

serial data output select, manual rate select input,

SD/HD rate indicator output, lock detect output,

auto/manual data bypass and output mute. The serial

data inputs, outputs, and serial clock outputs are

differential LVPECL compatible. The CML serial data

and serial clock outputs are suitable for driving 100Ω

differentially terminated networks. The control logic

inputs and outputs are LVCMOS compatible.

The LMH0346 is powered from a single 3.3V supply.

Power dissipation is typically 370 mW.

The device is available in two space-saving

packages: a 6.5 X 4.4 mm 20-pin HTSSOP and an

even more space–efficient 5 X 4 mm 24-pin WQFN

package.