LM1270 Datasheet | National Semiconductor

Description 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 processing for enhancing pictures or motion video. Image enhancement is acplished by special intermediate frequency boosting. 200 MHz bandwidth assures minimal impact on the video change when adding the LM1270. 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. 2. Calibration mode for determining the start of the image coordinates. 3. Data receiver for receiving data encoded on video. 4. Window highlight with respect to the horizontal and vertical sync, used with the image enhancing feature . 5. Video source selection, allowing the choice of two analog inputs. Features n Ideal panion IC to the LCCS to provide image enhancing for viewing pictures or motion video n Programmable clamp generator n Programmable blank generator n Video detection controlled by I2C patible 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 n Measures video position with respect to the horizontal flyback and vertical sync pulses, providing necessary information for auto-sizing n Emphasis done either inside or outside the window Applications n Any monitor designed with the LCCS chip set n Standard 0.7V video output assures patibility with any video pre-amp Block and Connection Diagram FIGURE 1. Order Number LM1270N See NS Package Number N24D © 2003 National Semiconductor Corporation DS200635 .national. Absolute Maximum Ratings 3) (Notes 1, Thermal Resistance to Ambient (θJA) Thermal Resistance to Case (θJC) Junction Temperature (TJ) ESD Susceptibility (Note 4) ESD Machine Model (Note 5) Storage Temperature Lead...