DP8521AV-25

Controllers Overview

The DP8521AV-25 is a dynamic RAM controller manufactured by National Semiconductor. It supports 1M x 1 DRAM configurations and is housed in a 68-pin PLCC package with J-leads measuring 25.13x25.13 mm. The device utilizes microCMOS technology for low power consumption. Key functional capabilities include error correction (ECC) and command scheduling to manage memory operations efficiently.

Controllers Feature Summary

• Integrated error correction (ECC) logic for data integrity
• Command scheduling mechanism for optimized memory access
• MicroCMOS construction for reduced power dissipation

Controllers Applications

• Video RAM controller systems
• Dynamic RAM management circuits
• Memory subsystems requiring ECC support

Controllers Procurement Notes

Verify the manufacturer designation as National Semiconductor, now part of Texas Instruments, when sourcing this component. Confirm the specific suffix 'AV-25' corresponds to the required speed grade and temperature range. Ensure the 68-LCC package type matches the target PCB footprint. Cross-reference the datasheet specifications against the intended application requirements before procurement.

Controllers Selection Notes

Select this controller for applications requiring dedicated DRAM management with built-in error correction. The 1M x 1 configuration suits specific memory array architectures. Consider the 68-pin PLCC package constraints for board layout. Evaluate the microCMOS power characteristics against system thermal budgets. Verify compatibility with the host processor interface signals.

Controllers Part Context

This component belongs to the DP8520/DP8521/DP8522 family of programmable video RAM controllers. These devices are designed for high-performance memory control in graphics and display applications. The DP8521 variant specifically targets 1M x 1 DRAM densities within this series.

Controllers Replacement Considerations

The DP8520AV-25 and DP8522AV-25 are related parts within the same product family. Verify pinout and density compatibility before substitution. Check if the specific DRAM size requirements align with the alternative part's supported configurations.