ADV453_15 Datasheet, PDF (1/12 Pages) Analog Devices – CMOS 66 MHz Monolithic 2563 24 Color Palette RAM-DAC

a
CMOS 66 MHz Monolithic 256؋24
Color Palette RAM-DAC
ADV453
FEATURES
66 MHz Pipelined Operation
FUNCTIONAL BLOCK DIAGRAM
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
E Image Processing
Instrumentation
Desktop Publishing
T AVAILABLE CLOCK RATES
66 MHz
40 MHz
E 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 Ï« 24
L _{color lookup table, a 3 Ï« 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
O ^{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
S _{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.
B _{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
O ^{DIP and a 44-pin plastic leaded (J-lead) chip carrier, PLCC.}
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
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