54S189J/C

Overview

The 54S189J/C is a military-grade 4-bit, 16-word random access memory (RAM) manufactured by Rochester Electronics. It utilizes the standard 54S series TTL logic family, designed for high-speed operation in demanding environments. The component features a hermetic metal can package to ensure reliability under extreme conditions. Key electrical parameters include a supply voltage of 5V and data retention capabilities typical of bipolar RAM technology. This device serves as non-volatile-free storage within digital systems requiring robust performance.

Feature Summary

• Military-grade construction with hermetic sealing
• 4-bit x 16 word memory capacity
• Standard 54S TTL logic compatibility
• High-speed bipolar RAM architecture

Applications

• Aerospace computing systems
• Military avionics data storage
• Spacecraft onboard memory modules
• Ruggedized industrial control units

Procurement Notes

Verify the specific lot traceability and environmental test reports required for military procurement contracts. Confirm that the hermetic seal integrity meets MIL-STD requirements before integration into flight-critical hardware. Ensure proper handling procedures for ceramic or metal can packages are followed during assembly.

Selection Notes

Select this component when radiation hardness and thermal stability are critical. Compare against commercial equivalents if cost is a primary constraint, noting the significant difference in qualification standards. Ensure the system power supply strictly adheres to the 5V tolerance specified for the 54S series to prevent logic errors.

Part Context

This part belongs to the 54-series family, distinguished from the 74-series by wider temperature ranges and stricter manufacturing controls. Rochester Electronics sources these components to support legacy defense and aerospace platforms where original manufacturer production has ceased.

Replacement Considerations

Direct pin-compatible replacements may be limited due to the specialized military grade. Verify functional equivalence with other 54S189 variants or upgraded 54LS189 versions, ensuring timing parameters match the existing system clock speeds.