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<strong>Analog</strong> Video <strong>Product</strong>s<br />
LMH1980 – Auto-Detecting SD/HD/PC Video Sync Separator<br />
Features<br />
• Sync separation for NTSC, PAL, SECAM, 480I/P, 576I/P, 720P, 1080I/P, and VESA-compatible timing<br />
• Composite Video (CVBS), S-Video (Y/C), Component Video (YPBPR/GBR) and<br />
PC Graphics (RGsB) compatibility<br />
• Bi-level and tri-level sync compatible<br />
• HD detect output flag<br />
• Automatic video format detection<br />
• Fixed-level sync slicing of 0.5 V P-P to 2 V P-P video inputs<br />
• 3.3V to 5V supply operation<br />
• Available in tiny MSOP-10 packaging<br />
Applications<br />
Ideal for use in consumer, professional, automotive and industrial video, video capture, editing and processing, genlock circuits,<br />
surveillance and security video systems, Set-Top Boxes (STB) and Digital Video Recorders (DVR), LCD/plasma displays and video<br />
projectors, machine vision and inspection systems, and video trigger oscilloscopes and waveform monitors<br />
LMH1981 Lowest Jitter Sync Separator for<br />
High-Definition Video Formats Featuring<br />
50% Sync Slicing<br />
Features<br />
• 50% sync slicing<br />
• Low-jitter horizontal sync outputs<br />
• Supports NTSC, PAL, SECAM, 480i/p, 576i/p, 720p, 1080i/p<br />
• Accepts video signals from 0.5 V P-P to 2.0 V P-P<br />
• No external programming with μC required<br />
• Horizontal sync output propagation delay < 50 ns<br />
• 3.3V or 5V single supply operation<br />
• 31 mW typical power dissipation<br />
LMH1982 – 3G/HD/SD Video Clock Generator<br />
with Genlock<br />
Features<br />
• Two reference ports for genlocking the outputs<br />
– H and V sync inputs for NTSC/525i, PAL/625i, 525p, 625p,<br />
720p, 1080i, 1080p video timing<br />
• Simultaneous SD and 3G/HD LVDS-compatible clock outputs<br />
• Achieves low jitter output clocks capable of directly driving<br />
FPGA serializers with no additional clock cleansing required<br />
• Genlock or free <strong>ru</strong>n mode operation<br />
• Programmable output top-of-frame pulse<br />
• Supports cross locking<br />
SD Clock<br />
3G/HD Clock<br />
Read <strong>Analog</strong> Edge Volume 4, Issue 7, Application Note 1489. Topic:<br />
“Improving Video Clock Generation in Modern Broadcast Video Systems”<br />
www.national.com/edge<br />
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