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Analog Devices - CMOS 66MHz Monolithic 256 x 324 Color Palette RAM-DAC

Numéro de référence ADV453
Description CMOS 66MHz Monolithic 256 x 324 Color Palette RAM-DAC
Fabricant Analog Devices 
Logo Analog Devices 





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ADV453 fiche technique
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CMOS 66 MHz Monolithic 256؋24
Color Palette RAM-DAC
ADV453
FEATURES
66 MHz Pipelined Operation
Triple 8-Bit D/A Converters
256؋24 Color Palette RAM
3؋24 Overlay Registers
RS-343A/RS-170 Compatible Outputs
؉5 V CMOS Monolithic Construction
40-Pin DIP or Small 44-Pin PLCC Package
Power Dissipation: 1000 mW
APPLICATIONS
High Resolution Color Graphics
CAE/CAD/CAM Applications
Image Processing
Instrumentation
Desktop Publishing
AVAILABLE CLOCK RATES
66 MHz
40 MHz
GENERAL DESCRIPTION
The ADV453 is a complete analog video output RAM-DAC on
a single monolithic chip. It is specifically designed for high reso-
lution color graphics systems. The part contains a 256 ϫ 24
color lookup table, a 3 ϫ 24 overlay palette as well as triple 8-bit
video D/A converters. The ADV453 is capable of simulta-
neously displaying up to 259 colors, 256 from the lookup table
and three from the overlay registers, out of a total color palette
of 16.8 million addressable colors.
The three overlay registers allow for implementation of overlay-
ing cursors, pull down menus and grids. There is an indepen-
dent, asynchronous MPU bus which allows access to the color
lookup table without affecting the input of video data via the
pixel port. The ADV453 is capable of generating RGB video
output signals which are compatible with RS-343A and RS-170
video standards, without requiring external buffering.
The ADV453 is fabricated in a +5 V CMOS process. Its mono-
lithic CMOS construction ensures greater functionality with low
power dissipation. The part is packaged in both a 0.6", 40-pin
DIP and a 44-pin plastic leaded (J-lead) chip carrier, PLCC.
FUNCTIONAL BLOCK DIAGRAM
PRODUCT HIGHLIGHTS
1. Fast video refresh rate, 66 MHz.
2. Compatible with a wide variety of high resolution color
graphics systems including VGA* and Macintosh II.**
3. Three overlay registers allow for implementation of overlay-
ing cursors, pull down menus and grids.
4. Guaranteed monotonic. Integral and differential nonlineari-
ties guaranteed to be a maximum of ± 1 LSB.
5. Low glitch energy, 50 pV secs.
**VGA is a trademark of International Business Machines Corp.
**Macintosh II is a registered trademark of Apple Computer Inc.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703

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