National Semiconductor LMH1251 YPBPR to RGB Decoder Data Sheet and 2x1 Video Switch Owner's Manual
Summary
This integrated semiconductor device functions as a high-precision 2:1 analog video switch and YP P to RGB decoder, designed for complex digital display systems. It supports robust video signal processing by detecting multiple formats (SDTV/HDTV) up to UXGA resolution. The manual details its technical capabilities, including multi-standard compatibility (e.g., 480p, 1080i), sync separation, and highly accurate analog color space conversion. It is the ideal solution for developers building set-top boxes, LCD monitors, and projectors that require enhanced, flexible video signal handling across various inputs.
Manual Details
| Brand | National |
|---|---|
| Pages | 10 |
| File Size | 597.04 KB |
| Published | June 17, 2026 |
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Frequently Asked Questions
What resolutions of video format can the LMH1251 handle?
It supports video formats up to UXGA (1600 x 1200 @ 75 Hz), including SDTV, HDTV, XGA, and SXGA.
Does this device perform color space conversion?
Yes, it includes an integrated decoder that performs the full analog YP P to RGB color space conversion.
What are the two operating modes for setup?
The unit can operate in Manual Mode (Pin 23 low) or Auto Mode (Pin 23 high), allowing automatic format detection.
What type of package is the LMH1251 available in?
The LMH1251 is available in a TSSOP-24 package.