DP8421ATVX-25

Controllers Overview

The DP8421ATVX-25 is a dynamic random access memory (DRAM) controller manufactured by National Semiconductor. It manages a 1M x 1 memory organization and operates with a maximum clock frequency of 25 MHz. The device utilizes a 20-bit address bus and features low power mode capabilities. It is housed in a 68-pin plastic leaded chip carrier (LCC-68) package, specifically designated as PQCC68 or QCCJ, with dimensions of 24.2316 mm length and a maximum seated height of 5.08 mm. The component supports an operating temperature range from -40 °C to 70 °C.

Controllers Feature Summary

• Supports 1M x 1 DRAM organization with a 20-bit address bus
• Operates at a maximum clock frequency of 25 MHz
• Includes low power mode functionality for energy efficiency
• Housed in a 68-pin plastic LCC package

Controllers Applications

• Embedded systems requiring dedicated DRAM management
• Industrial control units with specific memory constraints
• Automotive electronics operating within standard temperature ranges

Controllers Procurement Notes

Verify the exact suffix 'TVX' against manufacturer documentation to confirm pinout and electrical specifications match the required design. Ensure the 68-pin LCC package footprint aligns with PCB layout constraints. Confirm that the 25 MHz maximum clock speed meets system timing requirements. Check for RoHS compliance status if environmental regulations apply to the final assembly.

Controllers Selection Notes

Select this component when a fixed 1M x 1 DRAM interface is required with a 20-bit address width. The 25 MHz limit defines the maximum data throughput capability. Consider the LCC-68 package size for board space limitations. Verify thermal performance within the -40 °C to 70 °C range for the intended environment.

Controllers Part Context

This part belongs to the DP8421 series of DRAM controllers from National Semiconductor, now part of Texas Instruments. These controllers are designed to simplify the integration of static and dynamic RAM into microprocessor-based systems. The series typically offers various speed grades and package options to accommodate different performance and form factor needs in embedded applications.

Controllers Replacement Considerations

Consult official substitution guides for equivalent parts from National Semiconductor or Texas Instruments. Verify compatibility regarding voltage levels, pin assignments, and timing parameters before replacing.