TDA4685 Datasheet | NXP Semiconductors

INTEGRATED CIRCUITS DATA SHEET TDA4685 Video processor with automatic cut-off control Product specification Supersedes data of May 1993 File under Integrated Circuits, IC02 1997 Jun 20 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 - 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. GENERAL DESCRIPTION The TDA4685 is a monolithic integrated circuit with a luminance and a colour difference interface for video processing in TV receivers. Its primary function is to process the luminance and colour difference signals from a colour decoder which is equipped e.g. with the multistandard decoder TDA4655 or TDA9160 plus delay line TDA4661 and the Picture Signal Improvement (PSI) IC, TDA467X, or from a feature module. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA4685 DIP28 DESCRIPTION plastic dual in-line package; 28 leads (600 mil) The required...