JS28F512M29EWLA Equivalent & Substitute Parts

Part Overview

The JS28F512M29EWLA is a 512Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., packaged in a 56-TFSOP surface mount configuration. This component operates across a supply voltage range of 2.7V to 3.6V with an access time of 110 ns and a write cycle time of 110 ns. The device is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Memory Size	512Mbit
Memory Organization	64M x 8, 32M x 16
Memory Interface	Parallel
Access Time	110 ns
Write Cycle Time	110 ns
Voltage Supply Range	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Package Type	56-TFSOP (0.724", 18.40mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the obsolete JS28F512M29EWLA is based on strict equivalence across the following critical parameters:

Memory capacity: 512Mbit
Memory organization: 64M x 8 and 32M x 16 configurations
Interface type: Parallel
Package form factor: 56-TFSOP
Supply voltage range: 2.7V ~ 3.6V
Operating temperature range: -40°C ~ 85°C
Environmental compliance: ROHS3 and REACH status

The MT28EW512ABA1LJS-0SIT meets all substitution criteria. This part maintains identical memory capacity, organization, interface architecture, and package specifications. Both components share the same voltage supply requirements and operating temperature specifications, ensuring direct functional compatibility in existing circuit designs.

Parameter Comparison

Parameter	JS28F512M29EWLA	MT28EW512ABA1LJS-0SIT	Compatibility
Memory Size	512Mbit	512Mbit	Equivalent
Memory Organization	64M x 8, 32M x 16	64M x 8, 32M x 16	Equivalent
Memory Interface	Parallel	Parallel	Equivalent
Access Time	110 ns	95 ns	Compatible (faster)
Write Cycle Time	110 ns	60 ns	Compatible (faster)
Voltage Supply Range	2.7V ~ 3.6V	2.7V ~ 3.6V	Equivalent
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Equivalent
Package Type	56-TFSOP	56-TFSOP	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	3 (168 Hours)	3 (168 Hours)	Equivalent
Product Status	Obsolete	Active	Substitute is actively manufactured

Engineering Selection Recommendations

The MT28EW512ABA1LJS-0SIT is a direct functional substitute for the obsolete JS28F512M29EWLA. Both components are manufactured by Micron Technology Inc. and maintain identical electrical specifications, memory architecture, and physical packaging. The substitute part offers improved performance characteristics with faster access time (95 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns), providing enhanced operational capability without compromising compatibility.

The MT28EW512ABA1LJS-0SIT carries active product status with current manufacturing availability, addressing the obsolescence constraint of the original part. Both components maintain equivalent environmental compliance certifications (ROHS3 and REACH status) and identical moisture sensitivity levels, ensuring consistent handling and storage requirements throughout the supply chain.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW512ABA1LJS-0SIT be used as a direct replacement for the JS28F512M29EWLA?

A: Yes. Both parts share identical memory capacity (512Mbit), organization (64M x 8, 32M x 16), parallel interface architecture, supply voltage range (2.7V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and 56-TFSOP package form factor. The substitute part is pin-compatible and functionally equivalent.

Q: What are the performance differences between these parts?

A: The MT28EW512ABA1LJS-0SIT provides faster access time (95 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns). These improvements represent enhanced performance without introducing any compatibility issues in existing circuit designs.

Q: Are there any differences in environmental compliance?

A: Both parts maintain identical ROHS3 compliance and REACH status. Moisture sensitivity levels are equivalent at MSL 3 (168 Hours), ensuring identical handling and storage protocols.

Q: Why is the original part classified as obsolete?

A: The JS28F512M29EWLA is no longer in active production. The MT28EW512ABA1LJS-0SIT represents the current active equivalent from the same manufacturer, ensuring continued availability and supply chain continuity.

Q: Are there any package or mounting differences?

A: No. Both components use identical 56-TFSOP surface mount packaging with 0.724" width (18.40mm). PCB footprints and assembly processes remain unchanged.

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