TDA4687 Datasheet | NXP Semiconductors

INTEGRATED CIRCUITS DATA SHEET TDA4687 Video processor with automatic cut-off control Product specification Supersedes data of May 1993 File under Integrated Circuits, IC02 1997 Jun 23 Philips Semiconductors Product specification Video processor with automatic cut-off control Features - Operates from an 8 V DC supply - Black level clamping of the colour difference, luminance and RGB input signals with coupling-capacitor DC level storage - Two analog RGB inputs, selected either by fast switch signals or via I2C-bus; brightness and contrast control of both RGB inputs - Saturation, contrast, brightness and white adjustment via I2C-bus - Same RGB output black levels for Y/CD and RGB input signals - Timing pulse generation from either a 2 or 3-level sandcastle pulse for clamping, vertical synchronization and cut-off timing pulses - Automatic cut-off control or clamped output selectable via I2C-bus - Automatic cut-off control with picture tube leakage current pensation - Cut-off measurement pulses after end of the vertical blanking pulse or end of an extra vertical flyback pulse - Ultra-black or nominal black blanking selectable via I2C-bus in clamped output mode - Two switch-on delays to prevent discolouration before steady-state operation - Average beam current and peak drive limiting - PAL/SECAM or NTSC matrix selection via I2C-bus - Emitter-follower RGB output stages to drive the video output stages - I2C-bus controlled DC output e.g. for hue-adjust of NTSC (multistandard) decoders TDA4687 line TDA4661 and the Picture Signal Improvement (PSI) IC, TDA467X, or from a feature module. The required input signals are: - Luminance and negative colour difference signals - 2 or 3-level sandcastle pulse for internal timing pulse generation - I2C-bus data and clock signals for microcontroller control. Two sets of analog RGB colour signals can also be inserted, e.g. one from a peritelevision connector and the other from an on-screen display generator. The TDA4687...