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ADV476

Analog Devices
Part Number ADV476
Manufacturer Analog Devices
Description CMOS Monolithic 256x18 Color Palette RAM-DAC
Published Mar 23, 2005
Detailed Description a FEATURES Personal System/2* and VGA* Compatible Plug-in Replacement for INMOS 171/176 66 MHz Pipelined Operation Three...
Datasheet PDF File ADV476 PDF File

ADV476
ADV476

Overview
a FEATURES Personal System/2* and VGA* Compatible Plug-in Replacement for INMOS 171/176 66 MHz Pipelined Operation Three 6-Bit D/A Converters 256؋18 Color Palette RAM RS-343A/RS-170 Compatible Outputs Blank on All Three Channels Standard MPU Interface Asynchronous Access to All Internal Registers ؉5 V CMOS Monolithic Construction Low Power Dissipation Standard 28-Pin, 0.
6" DIP and 44-Pin PLCC APPLICATIONS High Resolution Color Graphics CAE/CAD/CAM Applications Image Processing Instrumentation Desktop Publishing AVAILABLE CLOCK RATES 66 MHz 50 MHz 35 MHz GENERAL DESCRIPTION CMOS Monolithic 256؋18 Color Palette RAM-DAC ADV476 FUNCTIONAL BLOCK DIAGRAM The ADV476 (ADV®) is a pin compatible and software compatible RAM-DAC designed specifically for VGA and Personal System/2 color graphics.
The ADV476 is a complete analog output RAM-DAC on a single monolithic chip.
The part contains a 256ϫ18 color lookup table, a pixel mask register as well as a triple 6-bit video D/A converter.
The ADV476 is capable of simultaneously displaying up to 256 colors, from a total color palette of 262,144 addressable colors.
The on-chip asynchronous MPU bus allows access to the color lookup table without affecting the input video data via the pixel port.
The pixel read mask register provides a convenient way of altering the displayed colors without updating the color lookup table.
The ADV476 is capable of generating RGB video output signals which are compatible with RS-343A and RS-170 video standards, without requiring external buffering.
The ADV476 is fabricated in a +5 V CMOS process.
Its monolithic CMOS construction ensures greater functionality with low power dissipation and small board area.
The part is packaged in a 0.
6", 28-pin DIP and a 44-pin PLCC.
PRODUCT HIGHLIGHTS 1.
Standard video refresh rates, 35 MHz, 50 MHz and 66 MHz.
2.
Fully compatible with VGA and Personal System/2 color graphics.
3.
Guaranteed monotonic.
Integral and differential linearity guaranteed to be a maximum of ...


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