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LMH1980

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自动检测 SD/HD/PC 视频同步分离器

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LMH1980

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产品详情

Number of outputs 5 Output type CMOS Core supply voltage (V) 3.3, 5 Output supply voltage (V) 3.3, 5 Input type CMOS Operating temperature range (°C) -40 to 85 Features Video sync separator Rating Catalog
Number of outputs 5 Output type CMOS Core supply voltage (V) 3.3, 5 Output supply voltage (V) 3.3, 5 Input type CMOS Operating temperature range (°C) -40 to 85 Features Video sync separator Rating Catalog
VSSOP (DGS) 10 14.7 mm² 3 x 4.9
  • 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

All trademarks are the property of their respective owners.

  • 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

All trademarks are the property of their respective owners.

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.

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.
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类型 标题 下载最新的英语版本 日期
* 数据表 LMH1980 Auto-Detecting SD/HD/PC Video Sync Separator 数据表 (Rev. A) 2013年 3月 15日
应用手册 LMH1980 Sync Separator Design Considerations in Cable Hot-Plug Applicatio 2016年 3月 27日
应用手册 Migrating From the LM1881 to the LMH1980 (Rev. A) 2013年 5月 3日
应用手册 Application Note 1841 LMH1982 Evaluation Board User Guide (cn) 最新英语版本 (Rev.A) 2008年 5月 21日

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评估板

LMH1980MMEVAL — 用于 LMH1980 的评估板

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.

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