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LMH1980MM NOPB
Auto-Detecting SD/HD/PC Video Sync Separator
LMH1980
www.ti.com SNLS263A–JULY 2007–REVISED MARCH 2013
LMH1980 Auto-Detecting SD/HD/PC Video Sync Separator
Checkfor Samples: LMH1980
1FEATURES DESCRIPTIONThe LMH1980is an auto-detecting SD/HD/PC video
Analog Video Sync Separation for NTSC, PAL, sync separator ideal for useina wide rangeof video
480I/P, 576I/P, 720P, 1080I/P/PsF, and Many applications, suchas automotive LCD monitors, video
VESA-Compatible Timing Formats capture& editing devices, surveillance& security
• Composite Video (CVBS), S-Video (Y/C), and equipment, and machine vision and inspection
Component Video (YPBPR/GBR) and PC systems.
Graphics (RGsB) Interfaces The LMH1980 accepts an analog video input signal
• SD/PC Bi-Level Sync& HD Tri-Level Sync with either bi-levelor tri-level sync and automatically
Compatible detects the video format, eliminating the need for
external RSET resistor adjustment required by other
• Composite, Horizontal, and Vertical Syncsync separators (e.g.: LM1881). The outputs provide
Outputs timing signalsin CMOS logic, including Composite,
• Burst/Back Porch Timing, Odd/Even Field, and Horizontal, and Vertical Syncs, Burst/Back Porch
HD Detect Flag outputs Timing, and Odd/Even Field outputs. The HD flag
Automatic Video Format Detection output (pin5) providesa logic low signal only whena
valid HD video input with tri-level syncis detected.
• Fixed-Level Sync Slicing for Video Inputs from The HD flag can be used to disable an external
0.5to2 VPP switch-controlled SD chroma filter when HD videois
• 3.3Vto 5V Supply Operation detected,or enableit when SD videois detected. For
non-standard video with bi-level sync and without
APPLICATIONS vertical serration pulses,a default vertical sync pulse
will be output and no horizontal sync pulses will be
• Consumer, Professional, Automotive& output during the vertical sync interval.
Industrial VideoThe LMH1980is availableina space-saving 10-lead
• Video Capture, Editing, and Processing Mini-SO Package (VSSOP) and operates overa
• Genlock Circuits temperature rangeof −40°Cto +85°C.
• Surveillance& Security Video Systems Set-Top Boxes (STB)& Digital Video
Recorders (DVR) LCD/ Plasma Displays and Video Projectors Inspection Systems and Waveform
