Features Analog video sync separation for NTSC, PAL, 480I/P, 576I/P, 720P, 1080I/P/PsF, and many VESA-compatible timing formats Composite Video (CVBS), S-Video (Y/C), and Component Video (YPBPR/GBR) and PC Graphics (RGsB) interfaces SD/PC Bi-level sync & HD tri-level sync compatible Composite, Horizontal, and Vertical Sync outputs Burst/Back Porch Timing, Odd/Even Field, and HD Detect Flag outputs Automatic video format detection Fixed-level sync slicing for video inputs from 0.5 to 2 VPP 3.3V to 5V supply operation Description The LMH1980 is an auto-detecting SD/HD/PC video sync separator ideal for use in a wide range of video applications, such as automotive LCD monitors, video capture & editing devices, surveillance & security equipment, and machine vision and inspection systems. The LMH1980 accepts an analog video input signal with either bi-level or tri-level sync and automatically detects the video format, eliminating the need for external RSET resistor adjustment required by other sync separators (e.g.: LM1881). The outputs provide timing signals in CMOS logic, including Composite, Horizontal, and Vertical Syncs, Burst/Back Porch Timing, and Odd/Even Field outputs. The ^HD flag output (pin 5) provides a logic low signal only when a valid HD video input with tri-level sync is detected. The ^HD flag can be used to disable an external switch-controlled SD chroma filter when HD video is detected, or enable it when SD video is detected. For non-standard video with bi-level sync and without vertical serration pulses, a default vertical sync pulse will be output and no horizontal sync pulses will be output during the vertical sync interval. The LMH1980 is available in a space-saving 10-ld. Mini-SO Package (MSOP) and operates over a temperature range of −40°C to +85°C. Applications Consumer, Professional, Automotive & Industrial Video Video Capture, Editing, and Processing Genlock Circuits Surveillance & Security Video Systems Set-Top Boxes (STB) & Digital Video Recorders (DVR) LCD / Plasma Displays and Video Projectors Machine Vision and Inspection Systems Video Trigger Oscilloscopes and Waveform Monitors

Also Recommended LMH1981▲ For Lower Jitter, Higher Performance

	Connection Diagram click for larger image Pinout

Parameters / Values	LMH1980	LMH1981
Function	Sync Separator	Sync Separator
Supported Video Formats	NTSC , SECAM , SD/PC bi-level and HD tri-level sync, 720p , 1080i/p , PC Sync on Green (VESA), 576i/p , 480i/p , PAL	SD bi-level and HD tri-level sync, NTSC , 720p , 1080i/p , 576i/p , 480i/p , PAL
Supply Voltage	3.3 Volt	3.3 Volt
OtherSupply Voltage	3.3V to 5V	3.3V to 5V
Temperature Min	-40 deg C	-40 deg C
Temperature Max	85 deg C	85 deg C

Datasheets

Title		Size	Date	Other Language
	LMH1980 Auto-Detecting SD/HD/PC Video Sync Separator	746 Kbytes	6-Jul-07	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1618: Application Note 1618 LMH1980 Evaluation Board Instruction Manual	674 Kbytes	19-Jul-07	日本語
	AN-1681: Application Note 1681 Design Migration from the LM1881 to the LMH1980	143 Kbytes	2-Aug-07	日本語
	AN-1841: Application Note 1841 LMH1982 Evaluation Board User Guide	913 Kbytes	21-May-08	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH1980MM/NOPB RoHS Status	MINI SOIC	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 1738 FARNELL Europe and Asia 397 MOUSER Worldwide 897 NEWARK Americas 613	$1.95 each at 1K+ pcs	reel of 1000
LMH1980MMX/NOPB RoHS Status	MINI SOIC	Full production Lead Time: 8 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$1.95 each at 1K+ pcs	reel of 3500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH1980.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH1980 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
LMH1980MMEVAL/NOPB	Evaluation Board for LMH1980	Full production Lead Free (RoHS)	Distributor Region Qty AVNET-EM Worldwide 1 DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$70.20 each	1
Description: The LMH1980 Evaluation Board can be used to test the LMH1980 Auto-Detecting SD/HD/PC Video Sync Separator and as a reference for PCB layout design. Contents: LMH1980 Evaluation board Application Note 1618 for the LMH1980MMEVAL Evaluation Board LMH1980 Datasheet

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
LMH1980MM/NOPB	29.841	MINI SOIC	10	1	260	Detail	Download	N/A	ZXTT AL4A
LMH1980MMX/NOPB	29.841	MINI SOIC	10	1	260	Detail	Download	N/A	ZXTT AL4A

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH1980.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH1980 is located at RoHS Status.

CAD Symbols and Models Download LMH1980 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LMH1980MM	CMOS7	0	21301	0	0	1584000	3	449464325
LMH1980MMX	CMOS7	0	21301	0	0	1584000	3	449464325

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.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for LMH1980.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for LMH1980 is located at RoHS Status.