DP8422VX-33

Controllers Overview

The DP8422VX-33 is a Dynamic RAM (DRAM) memory controller manufactured by National Semiconductor. It is designed for use with 4M x 1 DRAM configurations and utilizes CMOS technology. The component is housed in an 84-pin Plastic Quad Flat Package (PLCC), measuring approximately 29.31x29.31 mm. It operates with a nominal voltage of 5V and features through-hole terminal forms.

Controllers Feature Summary

• Functions as a dedicated controller for dynamic random-access memory systems
• Utilizes microCMOS technology for efficient operation
• Supports rectangular package shape with specific pin configuration

Controllers Applications

• System designs requiring 4M x 1 DRAM management
• Computer memory subsystems
• Embedded systems utilizing dynamic RAM storage

Controllers Procurement Notes

Verify the manufacturer designation, specifically National Semiconductor or its successor Texas Instruments, to ensure authenticity. Confirm the package type matches the required 84-pin PLCC specification. Check for any suffix variations that may indicate different temperature ranges or packaging options. Ensure the component meets the 5V operational requirement for your specific circuit design.

Controllers Selection Notes

Select this component when a dedicated controller for 4M x 1 DRAM is required within a 5V system architecture. Consider the 84-pin PLCC package constraints for PCB layout and thermal management. Evaluate compatibility with existing bus structures and timing requirements for the target DRAM modules before integration into the final design.

Controllers Part Context

This part belongs to the National Semiconductor DP84xx series of programmable DRAM controllers. These components are engineered to manage the refresh cycles and access patterns necessary for stable DRAM operation. The series typically includes variants supporting different memory densities and interface speeds, catering to various computing and industrial applications from the era of high-density static and dynamic memory systems.

Controllers Replacement Considerations

Consult official datasheets for direct equivalents such as the DP8422J or DP8422N, which may share functional similarities but differ in package or speed grade. Verify pin-to-pin compatibility and electrical specifications before substituting. Cross-reference with Texas Instruments documentation if National Semiconductor legacy parts are being replaced.