JS28F256M29EWHA Equivalent & Substitute Parts

Part Overview

The JS28F256M29EWHA is a 256Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., packaged in a 56-TFSOP 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 a wide temperature range (-40°C to 85°C) and is suitable for applications requiring non-volatile parallel memory storage with 110 ns access time performance.

Substiute Parts

JS28F256M29EWHA

Micron Technology Inc.In Stock: 20924JS28F256M29EWHA Datasheet

Current PartRFQ

MT28EW256ABA1HJS-0SIT

Micron Technology Inc.In Stock: 19144MT28EW256ABA1HJS-0SIT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS28F256M29EWHA is determined by strict alignment of the following critical parameters:

• Memory capacity: 256Mbit
• Memory organization: 32M x 8 or 16M x 16 configuration
• Interface type: Parallel
• Package type: 56-TFSOP surface mount
• Supply voltage range: 2.7V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Physical dimensions: 0.724" × 18.40mm width

The MT28EW256ABA1HJS-0SIT meets all these criteria. While it features improved access time (75 ns versus 110 ns) and write cycle time (60 ns versus 110 ns), these represent performance enhancements rather than incompatibilities. Both parts share identical memory capacity, organization, interface architecture, packaging, voltage specifications, and thermal operating range.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW256ABA1HJS-0SIT is a direct functional substitute for the JS28F256M29EWHA. 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 components satisfy ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for industrial and commercial applications. The identical MSL rating of 3 (168 Hours) ensures equivalent moisture handling and storage protocols during manufacturing and assembly operations.

The MT28EW256ABA1HJS-0SIT provides performance improvements in access time and write cycle time while maintaining full backward compatibility with existing circuit designs and PCB layouts. No design modifications are required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW256ABA1HJS-0SIT replace the JS28F256M29EWHA in existing designs?

A: Yes. Both parts share identical memory capacity (256Mbit), organization (32M x 8, 16M x 16), parallel interface architecture, 56-TFSOP package dimensions, supply voltage range (2.7V ~ 3.6V), and operating temperature range (-40°C ~ 85°C). No circuit modifications are required.

Q: What are the differences between these two parts?

A: The MT28EW256ABA1HJS-0SIT features faster access time (75 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns). The substitute part also carries Active product status, whereas the original is Obsolete. All other electrical and mechanical parameters are identical.

Q: Are the package dimensions identical?

A: Yes. Both parts use the 56-TFSOP package with identical physical dimensions of 0.724" × 18.40mm width. PCB footprints and assembly processes remain unchanged.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the JS28F256M29EWHA and MT28EW256ABA1HJS-0SIT are ROHS3 compliant and REACH unaffected. Both carry MSL rating 3 (168 Hours) for moisture sensitivity.

Q: Why is the original part listed as Obsolete?

A: The JS28F256M29EWHA has reached end-of-life status. The MT28EW256ABA1HJS-0SIT remains in active production, providing long-term availability for new designs and system support.