DP8422V-33

Controllers Overview

The DP8422V-33 is a dynamic RAM (DRAM) memory controller manufactured by National Semiconductor. It supports 4M x 1 DRAM configurations and utilizes microCMOS technology. The device operates within a supply voltage range of 4.5V to 5.5V and functions at temperatures between 0°C and 70°C. It is housed in an 84-pin PLCC package measuring 29.31x29.31 mm. Key functional capabilities include error correction (ECC) and command scheduling designed to optimize system throughput.

Controllers Feature Summary

• Integrates error correction (ECC) mechanisms for data integrity
• Implements command scheduling algorithms to enhance throughput efficiency
• Utilizes microCMOS technology for low power consumption

Controllers Applications

• Dynamic RAM memory subsystems requiring ECC support
• Computer systems utilizing 4M x 1 DRAM architectures
• Industrial control units operating within commercial temperature ranges

Controllers Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets were acquired by Texas Instruments. Confirm the specific package type is PQCC84 and ensure the operating temperature grade matches the 0°C to 70°C requirement. Check for any suffix variations that may indicate different speed grades or packaging options before finalizing procurement orders.

Controllers Selection Notes

Select this component when designing systems with 4M x 1 DRAM arrays that require hardware-level error correction. Ensure the design environment supports the 4.5V to 5.5V supply voltage range. Consider the 84-pin PLCC footprint constraints during PCB layout. Verify compatibility with the host processor's timing requirements for DRAM access cycles.

Controllers Part Context

This part belongs to the DP8420/21/22 series of programmable DRAM controllers. These devices are designed to manage complex DRAM refresh and access cycles. The DP8422 variant specifically targets higher density configurations compared to its 256k and 1M counterparts in the same family.

Controllers Replacement Considerations

Consult official datasheets for direct pin-compatible substitutes within the DP8422 series. Verify electrical specifications against alternative sources if sourcing from distributors other than authorized channels.