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 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. Applications • Broadcast and Professional Video Equipment • HDTV/DTV Systems • Genlock Circuits • Video Capture Devices • Set-Top Boxes (STB) & Digital Video Recorders (DVR) • Video Displays

Also Recommended LMH1980▲ Smaller Form Factor, Consumer Applications MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application *click for larger image	Connection Diagram click for larger image

Datasheet

Title		Size	Date	Other Language
	LMH1981 Multi-Format Video Sync Separator	1613 Kbytes	11-Jul-07	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1599: Application Note 1599 LMH1981 Evaluation Board Instruction Manual	503 Kbytes	11-Feb-09	日本語
	AN-1841: Application Note 1841 LMH1982 Evaluation Board User Guide	913 Kbytes	21-May-08	中文
	AN-1893: Application Note 1893 Demonstrating SMPTE-Compliant SDI Output Jitter Using the LMH1982 and Virtex-5 GTP Transmitter	2197 Kbytes	3-Oct-08
	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

More Application Notes

Title		Size	Date	Other Language
	AN-1681: Application Note 1681 Design Migration from the LM1881 to the LMH1980	143 Kbytes	2-Aug-07	日本語
	AN-1618: Application Note 1618 LMH1980 Evaluation Board Instruction Manual	674 Kbytes	19-Jul-07	日本語

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMH1981MT	CMOS7	0	18406	0	0	1089000	4	309006723
LMH1981MTX	CMOS7	0	18406	0	0	1089000	4	309006723

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.

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