DP8429D-80

Controllers Overview

The DP8429D-80 is a high-speed Dynamic RAM (DRAM) controller and driver designed for 1M x 1 memory applications. It operates with a maximum clock frequency of 80 MHz and utilizes a 20-bit address bus. The device features a 5V power supply requirement and supports a memory organization of 1M x 1 across four blocks. It is housed in a 52-pin Ceramic Dual In-line Package (CDIP) with side brazed construction, suitable for industrial temperature ranges up to 70°C.

Controllers Feature Summary

• Manages dynamic RAM read and write operations for embedded systems
• Provides high-speed control and driving capabilities for 1M x 1 DRAM arrays
• Integrates address and data buffering within a single bipolar IC

Controllers Applications

• Embedded system memory management
• Firmware boot storage interfaces
• Data storage controller circuits

Controllers Procurement Notes

Verify the specific suffix 'D' indicates the ceramic DIP package variant. Confirm the operating temperature range matches the required environment, as commercial variants may differ. Check RoHS compliance status, as older National Semiconductor parts often lack modern environmental certifications. Ensure the 5V logic level compatibility aligns with the host system design before procurement.

Controllers Selection Notes

Select this component when a dedicated bipolar DRAM controller is required for 1M x 1 architectures. Consider the 80 MHz speed limit against system timing requirements. Evaluate the CDIP52 package constraints for PCB layout and thermal management. Compare against newer CMOS alternatives if power consumption or pin count reduction is critical for the target application design.

Controllers Part Context

This part belongs to the National Semiconductor DP8429 series of DRAM controllers. It is manufactured by National Semiconductor, which is now part of Texas Instruments. The series includes variants like the DP8429V-70 and DP8429V-80, differing primarily in speed grades and package types. These components were widely used in legacy computing and industrial control systems requiring reliable DRAM interfacing.

Controllers Replacement Considerations

Public confirmed substitutes include the DP8429V-80 and DP8429V-70. Verify package compatibility, as the 'V' suffix typically denotes plastic DIP while 'D' indicates ceramic. Speed grade differences between 70 and 80 variants must be validated against system timing constraints.