SMJ44400-80HMM

Overview

The SMJ44400-80HMM is a 1M x 4-bit dynamic random-access memory (DRAM) manufactured by Texas Instruments. It features an 80 ns access time and operates on a single +5V ±10% power supply. The device supports enhanced page-mode operation for higher data bandwidth and includes CAS-before-RAS refresh capabilities with a 16 ms period for 1024 cycles. It utilizes a ceramic surface-mount package designed for high reliability in demanding environments.

Feature Summary

• Enhanced page-mode operation providing higher data bandwidth than conventional parts
• Supports random single-bit access within a row using column addressing
• TTL-compatible inputs, outputs, and clocks for interface flexibility
• Low power dissipation characteristics suitable for efficient system design

Applications

• Military aerospace systems requiring MIL-STD-883 Class B compliance
• High-reliability industrial control applications
• Data acquisition systems needing fast page-mode access
• Embedded storage in ruggedized electronic equipment

Procurement Notes

Verify the specific suffix HMM to confirm the ceramic surface-mount package configuration and lead time requirements. Ensure that the +5V supply tolerance aligns with your system design. Confirm whether MIL-STD-883 Class B processing is included or requires a separate specification check during procurement.

Selection Notes

Select this component when a 1M x 4 DRAM with 80 ns speed is required in a ceramic package. Consider the enhanced page-mode feature if high bandwidth is critical. Verify compatibility with TTL logic levels. Evaluate thermal management needs given the low power dissipation profile of the device.

Part Context

This part belongs to the SMJ44400 series of 1M x 4 DRAMs from Texas Instruments. It is designed for high-performance and low-power operation using state-of-the-art technology. The series is known for reliability and is often used in applications where radiation hardness or extreme environmental stability is not the primary driver, but robustness is essential.

Replacement Considerations

Check for direct substitutes like the SMJ44100 series if timing specifications allow. Verify pinout compatibility before replacing. Ensure that the replacement part meets the same MIL-STD-883 Class B requirements if applicable.