ADV476KN50E

Digital To Analog Converters Overview

The ADV476KN50E is an obsolete CMOS monolithic RAM-DAC designed for VGA and Personal System/2 color graphics. It integrates a 256x18-bit color palette RAM, pixel mask register, and three 6-bit video D/A converters. Operating at a maximum clock rate of 50 MHz, it supports simultaneous display of up to 256 colors from a 262,144-color palette. The device features RS-343A/RS-170 compatible analog outputs, asynchronous MPU access, and low glitch energy of 75 pV-sec. Packaged in a 28-pin DIP (N-28), it operates on a single +5 V supply with a maximum supply current of 220 mA.

Digital To Analog Converters Feature Summary

• Integrated 256x18 Color Palette RAM with Pixel Read Mask Register
• Three 6-bit DACs with ±0.5 LSB max Integral Nonlinearity
• 50 MHz Pipelined Operation with 4-clock Pipeline Delay
• Asynchronous MPU Interface for independent palette updates

Digital To Analog Converters Applications

• High Resolution Color Graphics Systems
• CAE/CAD/CAM Applications
• Image Processing Equipment
• Desktop Publishing Hardware

Digital To Analog Converters Procurement Notes

This component is officially classified as Obsolete by Analog Devices Inc. Verification of availability requires checking distributor stock or secondary market sources, as direct manufacturing support has ceased. Ensure compatibility with existing system designs before procurement.

Digital To Analog Converters Selection Notes

Select the ADV476KN50E specifically for 50 MHz operation requirements within the 28-pin DIP package. Verify that the system design accommodates the required IREF of 8.88 mA for RS-343A compliance. Consider pin-compatible alternatives like the ADV476KN66 if higher clock speeds are needed, or the ADV478 for enhanced features.

Digital To Analog Converters Part Context

The ADV476 series serves as a plug-in replacement for INMOS 171/176 devices. It is part of the ADV family of video RAM-DACs, offering software compatibility with earlier generations while providing integrated memory and masking capabilities for efficient color graphics generation.

Digital To Analog Converters Replacement Considerations

Direct functional substitutes include the ADV476KN66 (66 MHz) and ADV476KP50 (PLCC package). For modern replacements, consider the ADV478 or ADV471 series, which offer similar functionality with updated packaging and performance characteristics.