DP8422AVX-25

Controllers Overview

The DP8422AVX-25 is a high-performance CMOS DRAM controller manufactured by National Semiconductor. It functions as a programmable dynamic RAM controller and driver, supporting 256k, 1M, and 4M density arrays. The component utilizes an 84-lead Plastic Leaded Chip Carrier (PLCC) package with J-leads. Designed for microCMOS technology, it provides robust control and timing signals for DRAM operations.

Controllers Feature Summary

• Programmable architecture supporting multiple DRAM densities including 256k, 1M, and 4M configurations
• Integrated command scheduling capabilities to optimize data access throughput
• Surface mount design utilizing an 84-lead PLCC package for reliable connection

Controllers Applications

• Dynamic RAM array control in computer systems
• Memory subsystem timing management
• Embedded memory controller designs requiring programmable DRAM support

Controllers Procurement Notes

Verify the manufacturer origin carefully, as National Semiconductor assets are now managed by Texas Instruments. Confirm the specific suffix 'AVX-25' matches the required speed grade and package variant. Check current availability status, as this part may be classified as obsolete or limited stock depending on the distributor channel.

Controllers Selection Notes

Select this component when a dedicated programmable DRAM controller is required for legacy or specific industrial applications. Ensure the system design accommodates the 84-lead PLCC footprint. Verify that the supported DRAM densities align with the target memory specifications before integration.

Controllers Part Context

This device belongs to the DP8422 series of DRAM controllers. It serves as a specialized interface between the system bus and dynamic random-access memory. The series is characterized by its programmability and ability to drive various DRAM configurations efficiently.

Controllers Replacement Considerations

Consult Microchip USA or Texas Instruments documentation for direct equivalents. Potential substitutes include other parts within the DP8422 family, such as the DP8422AV-25, subject to pin compatibility and electrical specification verification.