JS28F256M29EWLA Equivalent & Substitute Parts

Part Overview

The JS28F256M29EWLA is a 256Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., housed in a 56-TFSOP package. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production support. The part operates across a wide temperature range (-40°C to 85°C) and is fully RoHS3 compliant, serving applications requiring non-volatile parallel memory storage with 110 ns access time performance.

Substiute Parts

JS28F256M29EWLA

Micron Technology Inc.In Stock: 8432JS28F256M29EWLA Datasheet

Current PartRFQ

MT28EW256ABA1LJS-0SIT

Micron Technology Inc.In Stock: 2143MT28EW256ABA1LJS-0SIT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS28F256M29EWLA is determined by strict alignment across the following critical parameters:

• Memory capacity: 256Mbit (non-negotiable)
• Memory organization: 32M x 8 or 16M x 16 configuration
• Interface type: Parallel only
• Package form factor: 56-TFSOP (0.724", 18.40mm Width)
• Supply voltage range: 2.7V ~ 3.6V compatibility
• Operating temperature range: -40°C ~ 85°C minimum coverage
• Technology: FLASH - NOR architecture

The MT28EW256ABA1LJS-0SIT meets all substitution criteria. This part maintains identical memory capacity, organization, interface, package dimensions, voltage specifications, and temperature range. The substitute demonstrates improved performance characteristics (75 ns access time versus 110 ns) and faster write cycle time (60 ns versus 110 ns), making it functionally compatible and performance-superior for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW256ABA1LJS-0SIT is the qualified substitute for the obsolete JS28F256M29EWLA. Both parts carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The substitute part maintains active product status, ensuring long-term availability and supply chain continuity.

The MT28EW256ABA1LJS-0SIT delivers performance improvements across access time and write cycle specifications while preserving full electrical and mechanical compatibility. Pin-for-pin compatibility and identical package dimensions enable direct board-level replacement without design modification.

Frequently Asked Questions (FAQ)

Q: Can MT28EW256ABA1LJS-0SIT replace JS28F256M29EWLA in existing designs?

A: Yes. Both parts share identical memory capacity (256Mbit), organization (32M x 8, 16M x 16), parallel interface, 56-TFSOP package form factor, voltage range (2.7V ~ 3.6V), and operating temperature range (-40°C ~ 85°C). The substitute is pin-compatible and requires no circuit modifications.

Q: What are the performance differences between these parts?

A: The MT28EW256ABA1LJS-0SIT provides faster access time (75 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns). These improvements enhance system performance without affecting functional compatibility.

Q: Are both parts RoHS compliant?

A: Yes. Both JS28F256M29EWLA and MT28EW256ABA1LJS-0SIT are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Why is the original part obsolete?

A: The JS28F256M29EWLA is classified as obsolete by the manufacturer. The MT28EW256ABA1LJS-0SIT maintains active product status, providing continued availability and manufacturing support.

Q: Are there packaging differences?

A: Both parts use 56-TFSOP packaging with identical dimensions (0.724", 18.40mm Width). The substitute is supplied in Tray packaging, while the original was supplied in standard packaging. This does not affect component functionality or board-level integration.