JS28F256M29EWLB TR Equivalent & Substitute Parts

Part Overview

The JS28F256M29EWLB TR is a 256Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., packaged in a 56-TSOP surface mount configuration. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production, maintenance, and design updates. The part operates across industrial temperature ranges (-40°C to 85°C) and complies with ROHS3 and REACH standards.

Substiute Parts

JS28F256M29EWLB TR

Micron Technology Inc.In Stock: 1258JS28F256M29EWLB TR Datasheet

Current PartRFQ

MT28EW256ABA1LJS-0SIT TR

Micron Technology Inc.In Stock: 1155MT28EW256ABA1LJS-0SIT TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS28F256M29EWLB TR is determined by strict equivalence across the following parameters:

• Memory capacity: 256Mbit
• Memory technology: FLASH - NOR
• Memory organization: 32M x 8, 16M x 16
• Interface type: Parallel
• Package type: 56-TFSOP
• Supply voltage range: 2.7V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Mounting type: Surface Mount
• Compliance standards: ROHS3, REACH

The MT28EW256ABA1LJS-0SIT TR meets all these criteria and qualifies as a direct substitute. Performance improvements in access time and write cycle time do not affect functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW256ABA1LJS-0SIT TR is a qualified substitute for the obsolete JS28F256M29EWLB 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 long-term availability and supply chain continuity. Both parts maintain equivalent compliance certifications (ROHS3, REACH) and identical moisture sensitivity levels. The improved access time (75 ns versus 110 ns) and write cycle time (60 ns versus 110 ns) in the substitute part provide performance enhancement without introducing compatibility concerns.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW256ABA1LJS-0SIT TR be used as a direct replacement for the JS28F256M29EWLB TR?

A: Yes. Both parts share identical memory capacity (256Mbit), technology (FLASH - NOR), organization (32M x 8, 16M x 16), interface type (Parallel), package configuration (56-TFSOP), supply voltage range (2.7V ~ 3.6V), and operating temperature range (-40°C ~ 85°C). Pin-to-pin compatibility is maintained.

Q: What is the difference in performance between these two parts?

A: The MT28EW256ABA1LJS-0SIT TR offers faster access time (75 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns). These improvements do not affect functional compatibility and represent performance enhancement.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance, REACH status, and moisture sensitivity levels (MSL 3, 168 Hours).

Q: Why is the original part listed as obsolete?

A: The JS28F256M29EWLB TR is classified as obsolete by the manufacturer. The MT28EW256ABA1LJS-0SIT TR maintains Active product status, ensuring continued availability and manufacturing support.

Q: Are the packaging and mounting specifications identical?

A: Yes. Both parts use 56-TFSOP surface mount packaging with identical physical dimensions (0.724", 18.40mm Width) and mounting type specifications.