SMJ4464-15JDS

Overview

The SMJ4464-15JDS is a 262,144-bit (64K x 4) page mode dynamic random-access memory (DRAM) manufactured by Texas Instruments. It features a maximum access time of 150 ns and utilizes a common I/O type with one port. The device is housed in an 18-pin ceramic dual in-line package (CDIP-18), measuring 22.606 mm in length. It is hermetically sealed with side brazed construction for reliability.

Feature Summary

• Supports page mode operation for sequential data access
• Hermetically sealed ceramic construction with side brazing
• Includes RAS only, CAS before RAS, and hidden refresh modes

Applications

• Military aerospace systems requiring radiation tolerance
• Spacecraft onboard data storage
• High-reliability defense electronics

Procurement Notes

Verify the component's authenticity through authorized channels due to its specialized military grade status. Confirm that the CDIP-18 package dimensions and hermetic seal specifications match system requirements. Ensure compliance with relevant export control classifications such as EAR99 for the intended destination.

Selection Notes

Select this part when high reliability and radiation hardness are critical. The 150 ns speed suits moderate-speed memory applications. The 64K x 4 density defines the capacity constraints. Consider the 18-pin DIP form factor for legacy socket compatibility or specific board layout needs.

Part Context

This component belongs to the SMJ series of space-grade memory devices from Texas Instruments. These parts are designed for harsh environments where standard commercial components would fail. The SMJ4464 variant specifically provides static RAM-like performance characteristics within a DRAM architecture optimized for long-term stability.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical compatibility if considering alternative manufacturers' radiation-hardened DRAMs.