Datasheet > LM1270NA

LM1270NA

更新时间： 2024-11-12 04:19:19

品牌	Logo	应用领域
美国国家半导体 - NSC		/
页数	文件大小	规格书
27页	1315K
描述
Hi-Brite 200 MHz I2C Compatible RGB Image Enhancer with Video Auto Sizing

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LM1270NA 数据手册

May 2003

LM1270

Hi-Brite 200 MHz I²C Compatible RGB Image Enhancer

with Video Auto Sizing

General Description

Features

n Ideal companion IC to the LCCS to provide image

enhancing for viewing pictures or motion video

n Programmable clamp generator

The LM1270 is a supplementary IC to the low cost chipset

(LCCS). It modifies the video stream prior to the LCCS

preamplifier. The key function of the LM1270 is image pro-

cessing for enhancing pictures or motion video. Image en-

hancement is accomplished by special intermediate fre-

quency boosting. 200 MHz bandwidth assures minimal

impact on the video change when adding the LM1270.

n Programmable blank generator

n Video detection controlled by I²C compatible bus,

allowing easy and accurate Hi-Brite window calibration

n Programmable window Hi-Brite function

n Programmable image sharpness control (TV emphasis),

adjustable for different line rates

Other functions of the LM1270 are:

1. Measures the length of the active video and its front

porch time with respect to the horizontal flyback and

vertical sync for auto alignment information.

n Measures video position with respect to the horizontal

flyback and vertical sync pulses, providing necessary

information for auto-sizing

2. Calibration mode for determining the start of the image

coordinates.

n Emphasis done either inside or outside the window

3. Data receiver for receiving data encoded on video.

Applications

4. Window highlight with respect to the horizontal and ver-

tical sync, used with the image enhancing feature.

n Any monitor designed with the LCCS chip set

n Standard 0.7V video output assures compatibility with

any video pre-amp

5. Video source selection, allowing the choice of two ana-

log inputs.

Block and Connection Diagram

20063501

FIGURE 1. Order Number LM1270N

See NS Package Number N24D

DS200635

www.national.com

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与LM1270NA相关器件

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LM1270NA-AZ5	TI	获取价格	IC,TV/VIDEO CIRCUIT,VIDEO PICTURE ENHANCER CIRCUIT,CMOS,DIP,24PIN,PLASTIC
LM1276	NSC	获取价格	150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character
LM1276AAA	NSC	获取价格	150 MHz I2C Compatible RGB Preamplifier with Internal 512 Character OSD ROM, 512 Character
LM1279	NSC	获取价格	110 MHz RGB Video Amplifier System with OSD
LM1279A	TI	获取价格	LM1279A 110 MHz RGB Video Amplifier System with OSD
LM1279AN	ETC	获取价格	Triple Video Amplifier
LM1279AN/NOPB	TI	获取价格	3 CHANNEL, VIDEO AMPLIFIER, PDIP20
LM1279N	NSC	获取价格	110 MHz RGB Video Amplifier System with OSD
LM1279N/NOPB	TI	获取价格	1 CHANNEL, VIDEO AMPLIFIER, PDIP20, DIP-20
LM1281	NSC	获取价格	85 MHz RGB Video Amplifier System with On Screen Display (OSD)