TDA4681 Datasheet | NXP Semiconductors

INTEGRATED CIRCUITS DATA SHEET TDA4681 Video processor with automatic cut-off and white level control Product specification Supersedes data of April 1993 File under Integrated Circuits, IC02 1997 Mar 04 Philips Semiconductors Product specification Video processor with automatic cut-off and white level 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 fully-controlled, analog RGB inputs, selected either by fast switch signals or via I2C-bus - Saturation, contrast and brightness 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, horizontal and vertical synchronization, cut-off and white level timing pulses - Automatic cut-off control with picture tube leakage current pensation - Software-based automatic white level control or fixed white levels via I2C-bus - Cut-off and white level measurement pulses in the last 4 lines of the vertical blanking interval (I2C-bus selection for PAL, SECAM, or NTSC, PAL-M) - Increased RGB signal bandwidths for progressive scan and 100 Hz operation (selected via I2C-bus) - 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 - Three adjustable reference voltage levels (via I2C-bus) for automatic cut-off and white level control - Emitter-follower RGB output stages to drive the video output stages - Hue control output for the TDA4555, TDA4650/T, TDA4655/T or TDA4657. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME TDA4681 TDA4681WP DIP28 PLCC28 DESCRIPTION plastic dual in-line package; 28 leads (600 mil) plastic leaded chip carrier; 28 leads GENERAL DESCRIPTION The TDA4681 is a monolithic integrated circuit with a colour difference interface for video processing in...