ADV476KN35 Analog Devices, ADV476KN35 Datasheet

ADV476KN35

Manufacturer Part Number

ADV476KN35

Description

CMOS Monolithic 256x18 Color Palette RAM-DAC

Manufacturer

Analog Devices

Datasheets

1.ADV476KN35.pdf (12 pages)

2.ADV476KN35.pdf (12 pages)

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GENERAL DESCRIPTION

The ADV476 (ADV

ible 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 256 18 color

lookup table, a pixel mask register as well as a triple 6-bit video

D/A converter. The ADV476 is capable of simultaneously dis-

playing 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.

* Personal System/2 and VGA are trademarks of International Business

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.

Machines Corp.

ADV is a registered trademark of Analog Devices, Inc.

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

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

5 V CMOS Monolithic Construction

) is a pin compatible and software compat-

The ADV476 is fabricated in a +5 V CMOS process. Its mono-

lithic 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

2. Fully compatible with VGA and Personal System/2 color

3. Guaranteed monotonic. Integral and differential linearity

4. Low glitch energy, 75 pV secs.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 617/329-4700

66 MHz.

graphics.

guaranteed to be a maximum of 1 LSB.

CMOS Monolithic 256 18

FUNCTIONAL BLOCK DIAGRAM

Color Palette RAM-DAC

ADV476

Fax: 617/326-8703

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