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LMH1251MTX Datasheet

  • LMH1251MTX

  • YPBPR to RGB Decoder and 2:1 Video Switch

  • 612.96KB

  • 10頁

  • NSC

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LMH1251 YP
B
P
R
to RGB Decoder and 2:1 Video Switch
August 2005
LMH1251
YP
B
P
R
to RGB Decoder and 2:1 Video Switch
General Description
The LMH
鈩?/div>
1251 is a wideband 2:1 analog video switch with
an integrated YP
B
P
R
to RGB decoder. The device accepts
one set of YP
B
P
R
inputs and one set of RGB/HSYNC/
VSYNC inputs. Based on the input selected, the output will
be either a decoded TV or buffered PC video signal.
The LMH1251 has a SYNC separator and processor that is
capable of 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 YP
B
P
R
to RGB in the
LMH1251 is realized with a very high precision fully analog
dematrixer that provides chrominance accuracy that is less
than 2.5% of amplitude & 1.5藲 of phase error on a vector-
scope. It is equipped with a smart video detection circuit
which automatically senses SDTV and HDTV video formats
and applies the appropriate color space conversion.
The LMH1251 is capable of handling SDTV, HDTV, XGA,
SXGA, and UXGA video formats, which makes it an ideal
solution for enhancing value in applications ranging from
LCD monitors, to set-top boxes, to projectors. The LMH1251
is available in a TSSOP-24 package.
Features
YP
B
P
R
to RGB decoding
YP
B
P
R
path: 70 MHz, 鈭? dB, 700 mV
PP
bandwidth
RGB path: 400 MHz, 鈭? dB, 700 mV
PP
bandwidth
Supports PC video display resolutions up to UXGA
(1600 x 1200
@
75 Hz)
n
Supports 480i, 480p, 576i, 576p, 720p, 1080i, and
1080p
n
Smart video format detection for SD and HD
n
Power save mode
n
n
n
n
Applications
n
n
n
n
TFT LCD monitor
CRT monitor
Set-top box
Display projector
Connection Diagram
24-Pin TSSOP
20151927
Top View
LMH
鈩?/div>
is a trademark of National Semiconductor Corporation.
漏 2005 National Semiconductor Corporation
DS201519
www.national.com

LMH1251MTX 產(chǎn)品屬性

  • National Semiconductor (TI)

  • Reel

  • 2500

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