DP8422ATV-25

Controllers Overview

The DP8422ATV-25 is a microCMOS programmable dynamic RAM controller and driver manufactured by National Semiconductor. It supports 256k, 1M, and 4M DRAM configurations within an 84-pin PLCC package measuring 29.31x29.31 mm. The device operates on a supply voltage of 4.5V to 5.5V with a temperature range of 0°C to 70°C.

Controllers Feature Summary

• Programmable architecture supporting multiple DRAM densities
• Integrated control and driver functions for memory systems

Controllers Applications

• Dynamic RAM memory system design
• Computer peripheral interfaces
• Embedded storage controllers

Controllers Procurement Notes

Verify the manufacturer part number DP8422ATV-25 against official National Semiconductor documentation. Confirm the 84-pin PLCC package type and electrical specifications match project requirements. Ensure compatibility with 4.5V to 5.5V power supplies and industrial temperature ranges before integration.

Controllers Selection Notes

Select this component when a dedicated DRAM controller is required for 256k, 1M, or 4M memory arrays. The 84-pin PLCC package suits surface-mount applications needing integrated driving capabilities. Verify pinout compatibility with existing board layouts and ensure voltage levels align with system logic standards.

Controllers Part Context

This IC belongs to the National Semiconductor DP8422 series of memory controllers. It serves as a specialized interface between processors and dynamic random-access memory, handling address multiplexing and refresh cycles essential for stable data retention in legacy computing architectures.

Controllers Replacement Considerations

Check datasheets for DP8422AV-25 and DP8422ATVX-25 as potential variants. Verify pin compatibility and electrical characteristics before substitution.