DP8420AV-20

Overview

The DP8420AV-20 is a microCMOS programmable dynamic RAM controller and driver manufactured by National Semiconductor. It supports memory organizations of 256k, 1M, and 4M bits. The device is designed to interface with high-speed DRAMs, providing necessary control signals and drivers for system operation.

Feature Summary

• Programmable architecture supporting multiple DRAM densities
• Integrated control logic and signal drivers
• microCMOS technology implementation

Applications

• Computer systems requiring DRAM management
• Embedded controllers utilizing dynamic memory
• Industrial equipment with memory expansion needs

Procurement Notes

Verify the specific suffix 'AV-20' against current datasheets to confirm timing characteristics and package type. Ensure compatibility with the target DRAM density (256k/1M/4M) before integration. Check for obsolescence status as National Semiconductor assets are managed by Texas Instruments.

Selection Notes

Select this component when a dedicated programmable DRAM controller is required for legacy or specific industrial designs. Compare performance requirements against newer integrated memory controllers if system complexity allows. Confirm voltage levels and interface standards match the target memory modules.

Part Context

This part belongs to the DP8420 series of programmable DRAM controllers. It was produced by National Semiconductor, which was later acquired by Texas Instruments. The series includes variants like DP8420A and DP8420V, differing in speed grades and packaging options.