JS28F128J3F75G Equivalent & Substitute Parts

Part Overview

The JS28F128J3F75G is a 128Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., housed in a 56-TSOP 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 suitable for applications requiring non-volatile parallel memory storage with 75 ns access time performance.

Substiute Parts

JS28F128J3F75G

Micron Technology Inc.In Stock: 1081JS28F128J3F75G Datasheet

Current PartRFQ

MT28EW128ABA1HJS-0SIT

Micron Technology Inc.In Stock: 18088MT28EW128ABA1HJS-0SIT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS28F128J3F75G is determined by strict alignment across the following critical parameters:

• Memory capacity: 128Mbit
• Memory organization: 16M x 8 or 8M x 16 configuration
• Interface type: Parallel
• Package footprint: 56-TFSOP (0.724", 18.40mm Width)
• Supply voltage range: 2.7V ~ 3.6V
• Operating temperature range: -40°C ~ 85°C
• Technology: FLASH - NOR

The MT28EW128ABA1HJS-0SIT meets all substitution criteria. While access time differs (95 ns versus 75 ns), this represents a relaxed timing specification suitable for applications where the original 75 ns performance is not a hard requirement. Both parts share identical memory capacity, organization, voltage specifications, temperature range, and physical packaging.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW128ABA1HJS-0SIT is the qualified substitute for the JS28F128J3F75G. Selection is based on the following factors:

• Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements
• The substitute maintains active product status, ensuring long-term availability and supply chain stability
• Identical memory capacity, organization, voltage specifications, and temperature range guarantee functional compatibility
• Physical packaging is identical, allowing direct PCB layout compatibility
• Access time specification of 95 ns accommodates most parallel memory applications; designs with strict 75 ns timing requirements must be evaluated individually

Frequently Asked Questions (FAQ)

Q: Can MT28EW128ABA1HJS-0SIT directly replace JS28F128J3F75G on existing PCBs?

A: Yes. Both parts use the 56-TFSOP package with identical pinout and footprint dimensions (0.724", 18.40mm Width). No PCB modifications are required.

Q: What is the difference in access time between these parts?

A: The JS28F128J3F75G specifies 75 ns access time, while the MT28EW128ABA1HJS-0SIT specifies 95 ns. This 20 ns difference represents a relaxed timing specification. Applications operating at standard parallel memory speeds will function without issue. Systems with timing-critical read operations must verify compatibility with the slower specification.

Q: Are both parts compliant with current environmental standards?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Why is the original part obsolete?

A: The JS28F128J3F75G is classified as obsolete by the manufacturer. The MT28EW128ABA1HJS-0SIT maintains active product status and represents the current generation equivalent from Micron Technology Inc.

Q: What is the memory organization of these parts?

A: Both parts support dual memory organization: 16M x 8 (16 million bytes) or 8M x 16 (8 million words). Configuration is determined by hardware strapping and firmware implementation.

Q: Are there any differences in write cycle time?

A: Yes. The JS28F128J3F75G specifies 75 ns write cycle time, while the MT28EW128ABA1HJS-0SIT specifies 60 ns. The substitute offers faster write performance, which is compatible with the original specification.