SMJ4416-20JDS

Overview

The SMJ4416-20JDS is a 16Kx4 Page Mode DRAM manufactured by Texas Instruments. It features a memory density of 65,536 bits organized as 16,384 words of 4 bits each. The device operates asynchronously with a maximum access time of 200 ns. It utilizes RAS-only refresh and has common I/O types. The component is housed in a CDIP18 ceramic dual in-line package with side brazed leads, measuring 0.300 inches in length.

Feature Summary

• Supports page mode operation for efficient sequential data access
• Utilizes RAS-only refresh mechanism to maintain data integrity
• Constructed in a hermetic ceramic DIP package for environmental stability
• Features asynchronous interface with common I/O configuration

Applications

• Military and aerospace electronic systems requiring radiation tolerance
• Spacecraft onboard data storage and management
• High-reliability industrial control systems
• Defense communication equipment memory modules

Procurement Notes

Verify the specific suffix JDS against official Texas Instruments documentation to confirm package type and lead finish specifications. Ensure compliance with relevant export control classifications (EAR99) and material restrictions before procurement. Confirm that the ceramic DIP18 package matches the target board layout requirements. Validate that the 200 ns access time meets system timing constraints. Check for RoHS non-compliance status if restricted materials are prohibited in the final assembly.

Selection Notes

Select this component when a ruggedized, hermetically sealed DRAM solution is required for harsh environments. The page mode architecture suits applications needing fast sequential read access. Consider the 16Kx4 capacity and 200 ns speed for legacy or specialized memory interfaces. Evaluate the CDIP18 package size against available PCB real estate. Ensure the asynchronous operation aligns with the system clock domain without additional synchronization logic.

Part Context

This part belongs to the SMJ series of space-grade and military-standard memory components produced by Texas Instruments. These devices are designed to withstand extreme temperatures and radiation effects found in aerospace and defense applications. The series typically offers enhanced reliability compared to commercial grade equivalents, ensuring long-term operational stability in critical missions where failure is not an option.

Replacement Considerations

Direct substitutes include other Texas Instruments SMJ-series DRAMs with compatible pinouts and electrical characteristics. Verify equivalent access times and refresh requirements when cross-referencing with similar page mode DRAMs from other manufacturers qualified for space use.