JS28F064M29EWHA Equivalent & Substitute Parts

Part Overview

The JS28F064M29EWHA is a 64Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., housed in a 56-TSOP package. This component operates at 2.7V to 3.6V with a 70ns access time and supports 8M x 8 or 4M x 16 memory organization. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

JS28F064M29EWHA

Micron Technology Inc.In Stock: 7335JS28F064M29EWHA Datasheet

Current PartRFQ

MT28EW128ABA1HJS-0SIT

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

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS28F064M29EWHA is determined by the following critical parameters:

• Package Compatibility: Both parts must use the 56-TFSOP package with identical physical dimensions (0.724", 18.40mm Width) to ensure PCB footprint compatibility
• Memory Interface: Parallel interface requirement must be maintained
• Voltage Supply Range: Operating voltage must be compatible with 2.7V ~ 3.6V specification
• Operating Temperature Range: Must support -40°C ~ 85°C operating conditions
• Technology: FLASH - NOR technology requirement
• Compliance Standards: RoHS3 compliance and MSL rating must be maintained

The MT28EW128ABA1HJS-0SIT meets all substitution criteria while offering increased memory capacity (128Mbit versus 64Mbit) within the same physical package and electrical operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW128ABA1HJS-0SIT is a direct substitute for the obsolete JS28F064M29EWHA based on matching package geometry, electrical operating parameters, and compliance certifications. Both components share identical voltage supply ranges, operating temperature specifications, and RoHS3 compliance status.

The substitute part offers increased memory capacity (128Mbit) while maintaining the same 56-TFSOP physical footprint and surface mount compatibility. The access time specification increases from 70ns to 95ns, and write cycle time decreases from 70ns to 60ns. These timing differences must be evaluated against system timing requirements during integration.

The MT28EW128ABA1HJS-0SIT maintains active product status with Micron Technology Inc., ensuring ongoing availability and supply chain continuity compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW128ABA1HJS-0SIT be used as a direct replacement on existing PCBs designed for the JS28F064M29EWHA?

A: Yes. Both components use the 56-TFSOP package with identical physical dimensions (0.724", 18.40mm Width), ensuring PCB footprint compatibility without layout modifications.

Q: What are the timing differences between these parts?

A: The JS28F064M29EWHA has a 70ns access time and 70ns write cycle time. The MT28EW128ABA1HJS-0SIT has a 95ns access time and 60ns write cycle time. System timing requirements must be evaluated to confirm compatibility.

Q: Are the voltage supply requirements identical?

A: Yes. Both parts operate within the 2.7V to 3.6V supply voltage range and support the same -40°C to 85°C operating temperature range.

Q: What is the memory capacity difference?

A: The JS28F064M29EWHA provides 64Mbit capacity with 8M x 8 or 4M x 16 organization. The MT28EW128ABA1HJS-0SIT provides 128Mbit capacity with 16M x 8 or 8M x 16 organization, offering double the storage capacity.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant with MSL rating 3 (168 Hours), ensuring equivalent environmental and regulatory compliance.

Q: What is the product status difference?

A: The JS28F064M29EWHA is classified as obsolete, while the MT28EW128ABA1HJS-0SIT maintains active product status with Micron Technology Inc., providing better long-term availability and supply chain support.