Philips TDA4688 free download

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INTEGRATED CIRCUITS DATA SHEET TDA4688 Video processor with automatic cut-off control Preliminary specification File under Integrated Circuits, IC02 July 1993 Philips Semiconductors Preliminary 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 the I2C-bus; brightness and contrast control of these 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 compensation · 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 (Japan) 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 · Positive amplification factor of cut-off control voltage. Note 1. SOT117-1; 1996 December 10. GENERAL DESCRIPTION The TDA4688 is a monolithic, integrated circuit with a luminance and a colour difference interface for video processing in TV receivers. (continued) QUICK REFERENCE DATA SYMBOL VP IP V8(p-p) V6(p-p) V7(p-p) V14 PARAMETER supply voltage (pin 5) supply current (pin 5) luminance input (peak-to-peak value) -(B-Y) input (peak-to-peak value) -(R-Y) input (peak-to-peak value) three-level sandcastle pulse H+V H BK two-level sandcastle pulse H+V BK Vi Vo(p-p) Tamb - - 2.5 4.5 0.7 2.0 - - - - 2.5 4.5 8.0 TDA4688 MIN. TYP. 7.2 - - - - 8.0 60 0.45 1.33 1.05 MAX. 8.8 - - - - - - - - - - - +70 UNIT V mA V V V V V V V V V V °C RGB input signals at pins 2, 3, 4, - 10, 11 and 12 (black-to-white value) RGB outputs at pins 24, 22 and 20 (peak-to-peak value) operating ambient temperature - 0 ORDERING INFORMATION PACKAGE EXTENDED TYPE NUMBER TDA4688 PINS 28 PIN POSITION DIL MATERIAL plastic CODE SOT117(1) July 1993 2 Preliminary specification TDA4688 Fig.1 Block diagram handbook, full pagewidth July 1993 hue control voltage 26 A45 to A40, A55 to A50, A65 to A60 AA5 to AA0 A05 to A00, A15 to A10, A25 to A20, A35 to A30 SDA 27 6-BIT D/A CONVERTER 19 cut-off control RC I2C-bus Philips Semiconductors SCL 28 I2C-BUS TRANSCEIVER leakage and cut-off current input BREN TDA4688 1ST AND 2ND SWITCH-ON DELAYS CUT-OFF COMPARATORS VFB 17 leakage storage 18 sandcastle