Philips TDA4680 free download

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INTEGRATED CIRCUITS DATA SHEET TDA4680 Video processor with automatic cut-off and white level control Product specification Supersedes data of April 1993 File under Integrated Circuits, IC02 1996 Oct 25 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 compensation · 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 TDA4680 TDA4680WP DIP28 PLCC28 DESCRIPTION plastic dual in-line package; 28 leads (600 mil) plastic leaded chip carrier; 28 leads GENERAL DESCRIPTION TDA4680 The TDA4680 is a monolithic integrated circuit with a colour difference interface for video processing in TV receivers. Its primary function is to process the luminance and colour difference signals from multistandard colour decoders, TDA4555, TDA4650/T, TDA4655/T or TDA4657, Colour Transient Improvement (CTI) IC, TDA4565, Picture Signal Improvement (PSI) IC, TDA4670, 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; both inputs are fully-controlled internally. The TDA4680 includes full I2C-bus control of all parameters and functions with automatic cut-off and white level control of the picture tube cathode currents. It provides RGB output signals for the video output stages. There is a very similar IC TDA4681 available. The only differences are in the N