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CXA1785AR Dataheets PDF



Part Number CXA1785AR
Manufacturers Sony Corporation
Logo Sony Corporation
Description US Audio Multiplexing Decoder
Datasheet CXA1785AR DatasheetCXA1785AR Datasheet (PDF)

CXA1785AR RGB Decoder/Driver For the availability of this product, please contact the sales office. Description The CXA1785AR is an RGB decoder/driver designed to drive LCD panels. This IC converts composite video signals, Y/C signals and Y/color difference signals into RGB signals used for driving LCDs. Features • Both NTSC/PAL compatible • Supports composite inputs, Y/C inputs and Y/color difference input • Band pass filter, trap and delay line • Sharpness function • γ compensation circuit • R.

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CXA1785AR RGB Decoder/Driver For the availability of this product, please contact the sales office. Description The CXA1785AR is an RGB decoder/driver designed to drive LCD panels. This IC converts composite video signals, Y/C signals and Y/color difference signals into RGB signals used for driving LCDs. Features • Both NTSC/PAL compatible • Supports composite inputs, Y/C inputs and Y/color difference input • Band pass filter, trap and delay line • Sharpness function • γ compensation circuit • R, B output delay time adjustment circuit • Polarity reverse circuit Applications • Color liquid crystal viewfinders • Liquid crystal projectors • Industrial monitors Structure Bipolar silicon monolithic IC 48 pin LQFP (Plastic) Absolute Maximum Ratings (Ta=25°C) • Supply voltage VCC1-GND 6 V • Supply voltage VCC2-VEE 15 V • Supply voltage GND-VEE 10 V • Input pin voltage VIN VCC1 V • Operating temperature Topr –30 to +85 °C • Storage temperature Tstg –55 to +150 °C • Allowable power dissipation PD 560 mW Operating Conditions • Supply voltage VCC1-GND 4.25 to 5.25 V • Supply voltage VCC2-GND 4.25 to 14.0 V • Supply voltage VCC2-VEE 11.25 to 14.0 V • Supply voltage VEE-GND –8.75 to 0 V Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits. —1— E93Z28-TE CXA1785AR Block Diagram SUB CONTRAST B SUB CONTRAST R SUB BRIGHT B BRIGHT DL ADJ GAMMA 2 SUB BRIGHT R 27 GAMMA 1 SYNC IN 36 SYNC OUT 37 SYNC SEP 35 34 33 32 31 30 29 28 26 CLIP FRP 25 VCC2 VREF 24 B OUT SYNC SEP 38 BGP GEN B-Y 23 DL γ BRIGHT B DC DET INV INT / EXT SW EXT B IN 39 BGP G-Y 22 G OUT γ BRIGHT MATRI X INV EXT G IN 40 R-Y 21 G DC DET DL γ BRIGHT EXT R IN 41 Y INV 20 R OUT CONTRAST 42 CLAMP G GEN DEMOD N PN P 19 R DC DET 43 Vcc1 AGC AMP PAL SW P N PHASE SHIFT VEE 18 F ADJ 44 AGC DET P N PICTURE P GND 17 IDENT N REG3 REG2 EXT SYNC F/F CLAMP 45 16 VXO VXO OUT AGC FILTER 46 REG1 COMP Y/C HPF COLOR KILLER APC HUE 15 APC FILTER AGC OUT 47 TRAP ACC ACC DET Y/C PAL ON 14 NT/PAL/ COLOR DEFFER VXO IN PICTURE 48 H. FILTER COMP 13 HUE 1 TRAP 2 H FILTER OUT 3 VIDEO IN 4 IDENT FILTER 5 C IN 6 BURST OUT 7 COLOR 8 KILLER FILTER 9 R-Y 10 11 12 B-Y —2— ACC FILTER CHROMA OUT CXA1785AR Pin Description Pin No. 1 Symbol TRAP Pin voltage 2.0V VCC1 (The pin voltage is VCC1 = 4.5 V) Equivalent circuit Description Trap connection. Leave this pin open other than when composite video input is selected. 1 VEE GND 2 H FILTER OUT VCC1 Outputs the video signal to be input to the sync separation circuit. 2 VEE GND 3 VIDEO IN 2.25V VCC1 3 Composite video signal input (Y signal when using Y/C input and Y/color difference input). The standard input level is 0.5 VP-P (from sync tip to 100 % white). GND VEE 4 IDENT FILTER VCC1 IDENT detection filter connection. Leave this pin open other than when PAL mode is selected. 4 VEE GND 5 C IN 2.5V VCC1 5 VEE GND Chroma signal input when using Y/C input. Composite video signal input is supported when this pin is connected to GND. Leave this pin open when Y/color difference input. The standard input level is 0.15 VP-P (burst). —3— CXA1785AR Pin No. 6 Symbol COLOR Pin voltage VCC1 Equivalent circuit Description Color adjustment. The amplitude of color difference signal is adjusted when Y/color difference input. 6 VEE GND 7 BURST OUT 3.2V VCC1 7 Burst cleaning coil is connected for PAL. Leave this pin open other than when PAL mode is selected. VEE GND 8 KILLER FILTER VCC1 8 Killer detection filter is connected. Leave this pin open other than when Y/color difference input is selected. GND VEE 9 R–Y 1.9V VCC1 9 10 B–Y 1.9V 10 VEE GND Color difference demodulation circuit inputs. Leave this pin open for NTSC. Color difference signal is input when Y/color difference input. In this case, input is pedestal clamped by using external coupling capacitor. ACC detection filter is connected. Leave this pin open for Y/color difference input. 11 ACC FILTER VCC1 11 VEE —4— CXA1785AR Pin No. 12 Symbol CHROMA OUT Pin voltage 2.3V VCC1 Equivalent circuit Description Color adjusted and burst taken out chroma signal is output. 12 VEE GND 13 HUE VCC1 13 VEE GND 14 VXO IN 3.9V VCC1 Color phase adjustment pin. Also doubles as the NTSC, PAL or Y/color difference switch. PAL is selected when this pin is connected to GND; Y/color difference is selected when this pin is connected to Vcc1. VXO input. Leave this pin open for Y/color difference input. 14 GND VEE 15 APC FILTER VCC1 APC detection filter connection. Leave this pin open for Y/color difference input. 15 VEE.


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