LMH1981 - Multi-Format Video Sync Separator
Datasheet Packaging Samples & Pricing Eval. Boards Reliability Application Notes Knowledge Base

Features
Standard analog video sync separation for NTSC, PAL, 480I/P, 576I/P, 720P, and 1080I/P/PsF from Composite Video (CVBS), S-Video (Y/C), and Component Video (YPBPR/GBR) interfaces
Bi-level & tri-level sync compatible
Composite, Horizontal, and Vertical Sync Outputs
Burst/Back Porch Timing, Odd/Even Field, and Video Format Outputs
Superior jitter performance on leading edge of HSync
Automatic video format detection
50% sync slicing for video inputs from 0.5 VPP to 2 VPP
3.3V to 5V supply operation

General Description


The LMH1981 is a high performance multi-format sync separator ideal for use in a wide range of video applications, such as broadcast and professional video equipment and HDTV/DTV systems.

The input accepts standard analog SD/ED/HD video signals with either bi-level or tri-level sync, and the outputs provide all of the critical timing signals in CMOS logic, which swing from rail-to-rail (VCC and GND) including Composite, Horizontal, and Vertical Syncs, Burst/Back Porch Timing, Odd/Even Field, and Video Format Outputs. HSync features very low jitter on its leading (falling) edge, minimizing external circuitry needed to clean and reduce jitter in subsequent clock generation stages.

The LMH1981 automatically detects the input video format, eliminating the need for programming using a microcontroller, and applies precise 50% sync slicing to ensure accurate sync extraction at OH, even for inputs with irregular amplitude from improper termination or transmission loss. More...


Applications


Broadcast and Professional Video Equipment
HDTV/DTV Systems
Genlock Circuits
Video Capture Devices
Set-Top Boxes (STB) & Digital Video Recorders (DVR)
Video Displays
  Typical Application
*click for larger image


ParametersValues
Function Sync Separator
Supported Video Formats SD bi-level and HD tri-level sync, NTSC , 720p , 1080i/p , 576i/p , 480i/p , PAL
Supply Voltage 3.3 Volt
OtherSupply Voltage 3.3V to 5V
Temperature Min -40 deg C
Temperature Max 85 deg C

  Also Recommended
LMH1980Smaller Form Factor, Consumer Applications
Additional Resources
Application Notes


Connection Diagram


click for larger image



Datasheet
RoHS Compliance Information Size in KbytesDate Click link below to Download
LMH1981 Multi-Format Video Sync Separator 1613
Kbytes
11-Jul-07 Download
LMH1981 Multi-Format Video Sync Separator (Japanese)
712 Kbytes   Download

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Package Availability, Models, Samples & Pricing
Part NumberPackageFactory Lead TimeModelsSamples &
Electronic
Orders
Budgetary PricingStd
Pack
Size
Package
Marking
Format
TypePinsSpec.MSL
Rating
Peak
Reflow
RoHS
Report
CAD
Symbols
WeeksQtyQty$US each
ML571-1982CLKHigh-Performance SMPTE Video Clock Module for Xilinx ML571 Serial Digital Video BoardFull productionN/A
 
Buy Now
1+$299.001-
N/AN/A
LMH1981MTTSSOP14NOPB1260RoHS N/A Full productionN/A
Samples
Buy Now
1K+$5.15rail
of
94
NSUZXYTT
LMH19
81MT
6 weeks500
LMH1981MTXTSSOP14NOPB1260RoHS N/A Full productionN/A
 
Buy Now
1K+$5.15reel
of
2500
NSUZXYTT
LMH19
81MT
8 weeks3000
LMH1981MTEVALEvaluation Board for the LMH1981 Multi-Format Video Sync SeparatorFull productionN/A
 
Buy Now
1+$99.001-
N/AN/A

General Description


The LMH1981 is a high performance multi-format sync separator ideal for use in a wide range of video applications, such as broadcast and professional video equipment and HDTV/DTV systems.

The input accepts standard analog SD/ED/HD video signals with either bi-level or tri-level sync, and the outputs provide all of the critical timing signals in CMOS logic, which swing from rail-to-rail (VCC and GND) including Composite, Horizontal, and Vertical Syncs, Burst/Back Porch Timing, Odd/Even Field, and Video Format Outputs. HSync features very low jitter on its leading (falling) edge, minimizing external circuitry needed to clean and reduce jitter in subsequent clock generation stages.

The LMH1981 automatically detects the input video format, eliminating the need for programming using a microcontroller, and applies precise 50% sync slicing to ensure accurate sync extraction at OH, even for inputs with irregular amplitude from improper termination or transmission loss. Its unique Video Format Output conveys the total horizontal line count per field as an 11-bit binary serial data stream, which can be decoded by the video system to determine the input video format and enable dynamic adjustment of system parameters, i.e.: color space or scaler conversions. The LMH1981 is available in a 14-pin TSSOP package and operates over a temperature range of −40°C to +85°C.

Reliability Metrics


Part Number Process EFR Reject EFR Sample Size PPM LTA Rejects LTA Device Hours FITS MTTF (Hours)
LMH1981MTCMOS70184060010890004309006723
LMH1981MTXCMOS70184060010890004309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

For more information on Reliability Metrics, please click here.


Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1599: Application Note 1599 LMH1981 Evaluation Board Instruction Manual 503
Kbytes
11-Feb-09 Download
AN-1841: Application Note 1841 LMH1982 Evaluation Board User Guide 913
Kbytes
21-May-08 Download
AN-1841 (Chinese): Application Note 1841 LMH1982 Evaluation Board User Guide
599 Kbytes  
AN-1893: Application Note 1893 Demonstrating SMPTE-Compliant SDI Output Jitter Using the LMH1982 and Virtex-5 GTP Transmitter 2197
Kbytes
3-Oct-08 Download
AN-1971: Application Note 1971 Triple Rate SDI IP FPGA Resource Utilization on the SDXILEVK/AES-EXP-SDI-G Reference Design 195
Kbytes
6-May-09 Download

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More Application Notes


TitleSize in Kbytes Date Click link below to Download
AN-1681: Application Note 1681 Design Migration from the LM1881 to the LMH1980 143
Kbytes
2-Aug-07 Download
AN-1681 (Japanese): Application Note 1681 Design Migration from the LM1881 to the LMH1980
119 Kbytes   Download
AN-1618: Application Note 1618 LMH1980 Evaluation Board Instruction Manual 674
Kbytes
19-Jul-07 Download
AN-1618 (Japanese): Application Note 1618 LMH1980 Evaluation Board Instruction Manual
412 Kbytes   Download

If you have trouble printing or viewing PDF file(s), see Printing Problems.

[Information as of 7-Nov-2009]