DP8419V-70

Overview

The DP8419V-70 is a dynamic RAM controller manufactured by National Semiconductor. It supports 64k and 256k DRAM configurations with a 256K x 1 organization. The device operates within a voltage range of 4.5V to 5.5V and functions at speeds up to 70ns. It is housed in a 68-LCC (J-Lead) package, also referred to as 68-PLCC with dimensions of 25.13x25.13 mm. The operational temperature range extends from 0°C to 70°C.

Feature Summary

• Provides dedicated control logic for managing dynamic RAM operations
• Supports multiple memory densities including 64k and 256k configurations
• Integrated driver capabilities for direct interface with DRAM components

Applications

• Data storage systems requiring DRAM management
• Firmware boot architecture implementations
• Memory controller circuits in embedded systems

Procurement Notes

Verify the manufacturer designation, noting that National Semiconductor assets are now part of Texas Instruments. Confirm the specific suffix 'V' indicates the correct speed grade and package variant. Ensure compatibility with the required 4.5V to 5.5V supply voltage and 68-pin LCC footprint before procurement.

Selection Notes

Select this component when a dedicated controller for 64k or 256k DRAM is required. The 70ns speed rating suits applications needing moderate access times. Consider the 68-LCC package for surface mount assembly. Verify that the 0°C to 70°C commercial temperature range meets the environmental requirements of the target system design.

Part Context

This part belongs to the DP8419 series of dynamic RAM controllers. Variants such as DP8419N-70 and DP8419N-80 exist, differing primarily in speed grades and package types. The series provides essential timing and control signals for synchronizing DRAM refresh cycles and data transfers in legacy computing architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.