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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-lead Mini-SO Package (VSSOP) and operates over a temperature range of −40°C to +85°C.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | LMH1980 Auto-Detecting SD/HD/PC Video Sync Separator datasheet (Rev. A) | 15 Mar 2013 | |
| Application note | LMH1980 Sync Separator Design Considerations in Cable Hot-Plug Applicatio | 27 Mar 2016 | ||
| Application note | Migrating From the LM1881 to the LMH1980 (Rev. A) | 03 May 2013 | ||
| EVM User's guide | AN-1618 LMH1980 Evaluation Board Instruction Manual (Rev. B) | 26 Apr 2013 | ||
| EVM User's guide | AN-1841 LMH1982 Evaluation Board User Guide (Rev. A) | 26 Apr 2013 |
For additional terms or required resources, click any title below to view the detail page where available.
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.
| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
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