LMH1980 - 自动检测 SD/HD/PC 视频同步分离器

LMH1980是TI德州仪器公司的一款视频定时产品，LMH1980是自动检测 SD/HD/PC 视频同步分离器，本站介绍了LMH1980的封装应用图解、特点和优点、功能等，并给出了与LMH1980相关的TI元器件型号供参考。

LMH1980 - 自动检测 SD/HD/PC 视频同步分离器 - 视频定时 - 视频：广播和专业 - 德州仪器

产品描述

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.

产品特性

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

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