JS28F256M29EWHB TR - Equivalent & Substitute Parts

Part Overview

The JS28F256M29EWHB TR is a 256Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., packaged in 56-TSOP surface mount configuration. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and production continuity. The part operates across industrial temperature ranges (-40°C to 85°C) and is RoHS3 compliant with MSL-3 moisture sensitivity rating.

Substiute Parts

JS28F256M29EWHB TR

Micron Technology Inc.In Stock: 1040JS28F256M29EWHB TR Datasheet

Current PartRFQ

MT28EW256ABA1HJS-0SIT TR

Micron Technology Inc.In Stock: 772MT28EW256ABA1HJS-0SIT TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS28F256M29EWHB TR is determined by the following critical parameters:

Memory capacity and organization must remain constant at 256Mbit with 32M x 8 or 16M x 16 configuration to ensure address and data bus compatibility. The parallel interface requirement is non-negotiable for direct pin-level compatibility. Package type must be 56-TFSOP surface mount to maintain PCB footprint and soldering process compatibility. Voltage supply range of 2.7V to 3.6V ensures power distribution system compatibility. Operating temperature range of -40°C to 85°C must be met or exceeded to support the same environmental conditions.

The MT28EW256ABA1HJS-0SIT TR qualifies as a direct substitute based on matching all critical parameters while offering improved performance characteristics in access time and write cycle specifications.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW256ABA1HJS-0SIT TR is the qualified substitute for the obsolete JS28F256M29EWHB TR. Both components are manufactured by Micron Technology Inc. and maintain identical electrical and mechanical specifications across all critical parameters. The substitute part carries Active product status, ensuring continued availability and supply chain support compared to the Obsolete status of the original part.

Both parts maintain ROHS3 compliance and identical MSL-3 ratings, supporting equivalent handling and storage requirements. The substitute part demonstrates improved performance with reduced access time (75 ns versus 110 ns) and write cycle time (60 ns versus 110 ns), providing performance headroom without introducing compatibility concerns.

Frequently Asked Questions (FAQ)

Q: Can MT28EW256ABA1HJS-0SIT TR be used as a direct replacement for JS28F256M29EWHB TR?

A: Yes. Both parts share identical memory capacity (256Mbit), organization (32M x 8, 16M x 16), parallel interface, voltage supply range (2.7V to 3.6V), operating temperature range (-40°C to 85°C), and 56-TFSOP package configuration. Pin-level compatibility is maintained.

Q: What are the key differences between these parts?

A: The substitute part offers faster access time (75 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns). The original part is obsolete while the substitute maintains Active product status.

Q: Are there any package or mounting differences?

A: No. Both parts use identical 56-TFSOP surface mount packaging with 0.724" width (18.40mm), ensuring PCB footprint and soldering process compatibility.

Q: Do compliance ratings differ between the parts?

A: No. Both parts are ROHS3 compliant with MSL-3 moisture sensitivity rating (168 hours), maintaining identical environmental and regulatory compliance profiles.

Q: Is the improved performance of the substitute part a concern for system compatibility?

A: No. Faster access and write cycle times do not introduce compatibility issues. Systems designed for the original 110 ns timing specifications operate correctly with the faster 75 ns and 60 ns substitute part.