LMH1251MTX ,YPBPR to RGB Decoder and 2:1 Video Switchapplications ranging fromLCDmonitors,toset-topboxes,toprojectors.TheLMH1251is available in a TSSOP- ..
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LMH1251MT-LMH1251MTX
YPBPR to RGB Decoder and 2:1 Video Switch
LMH1251BPR to RGB Decoder and 2:1 Video Switch
General DescriptionThe LMH™1251isa wideband2:1 analog video switch with integrated YPBPRto RGB decoder. The device accepts
one setof YPBPR inputs and one setof RGB/HSYNC/
VSYNC inputs. Basedon the input selected, the output will eithera decodedTVor buffered PC video signal.
The LMH1251 hasa SYNC separator and processor thatis
capableof extracting sync timing information from both Stan-
dard Definition Television (SDTV) and High Definition Tele-
vision (HDTV) inputs.It provides bi-level sync, and tri-level
sync separation.
The color space conversion from YPBPRto RGBin the
LMH1251is realized witha very high precision fully analog
dematrixer that provides chrominance accuracy thatis less
than 2.5%of amplitude& 1.5˚of phase errorona vector-
scope.Itis equipped witha smart video detection circuit
which automatically senses SDTV and HDTV video formats
and applies the appropriate color space conversion.
The LMH1251is capableof handling SDTV, HDTV, XGA,
SXGA, and UXGA video formats, which makesitan ideal
solutionfor enhancing valuein applications ranging from
LCD monitors,to set-top boxes,to projectors. The LMH1251 availableina TSSOP-24 package.
Features YPBPRto RGB decoding YPBPR path:70 MHz,−3 dB, 700 mVPP bandwidth RGB path: 400 MHz,−3 dB, 700 mVPP bandwidth SupportsPC video display resolutionsupto UXGA
(1600x 1200@75 Hz) Supports 480i, 480p, 576i, 576p, 720p, 1080i, and
1080p Smart video format detectionfor SD and HD Power save mode
Applications TFT LCD monitor CRT monitor Set-top box Display projector
Connection Diagram
24-Pin TSSOPTop View
August 2005
LMH1251
RGB
Decoder
and
2:1
ideo
Switch
