JS28F00AM29EWLA Equivalent & Substitute Parts

Part Overview

The JS28F00AM29EWLA is a 1Gbit NOR Flash memory IC manufactured by Micron Technology Inc., configured as 128M x 8 or 64M x 16 with parallel interface and 110 ns access time. This component is classified as Obsolete, making equivalent substitute parts necessary for ongoing system support and new design implementations. The part is housed in a 56-TFSOP surface mount package and operates across the industrial temperature range of -40°C to 85°C.

Key Parameters

Parameter	Value
Memory Size	1Gbit
Memory Organization	128M x 8, 64M x 16
Memory Interface	Parallel
Access Time	110 ns
Write Cycle Time	110 ns
Supply Voltage	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 eligibility for the JS28F00AM29EWLA is determined by the following critical parameters:

Memory capacity: 1Gbit
Memory organization: 128M x 8 or 64M x 16
Interface type: Parallel
Package: 56-TFSOP surface mount
Supply voltage range: 2.7V ~ 3.6V
Operating temperature range: -40°C ~ 85°C
RoHS3 compliance
MSL rating: 3

The MT28EW01GABA1LJS-0SIT qualifies as a direct substitute based on matching all critical electrical and mechanical parameters. While access time differs (95 ns versus 110 ns), this represents an improvement in performance characteristics and does not restrict substitution in applications designed for the original part.

Parameter Comparison

Parameter	JS28F00AM29EWLA	MT28EW01GABA1LJS-0SIT
Manufacturer	Micron Technology Inc.	Micron Technology Inc.
Memory Size	1Gbit	1Gbit
Memory Organization	128M x 8, 64M x 16	128M x 8, 64M x 16
Memory Interface	Parallel	Parallel
Access Time	110 ns	95 ns
Write Cycle Time	110 ns	60 ns
Supply Voltage	2.7V ~ 3.6V	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	56-TFSOP (0.724", 18.40mm Width)	56-TFSOP (0.724", 18.40mm Width)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)
Product Status	Obsolete	Active

Engineering Selection Recommendations

The MT28EW01GABA1LJS-0SIT is suitable for direct substitution of the JS28F00AM29EWLA. Both components are manufactured by Micron Technology Inc. and maintain identical electrical specifications for supply voltage, operating temperature range, memory capacity, and organization. The substitute part carries Active product status, ensuring continued availability and supply chain support.

The MT28EW01GABA1LJS-0SIT demonstrates improved performance characteristics with reduced access time (95 ns) and write cycle time (60 ns) compared to the original part (110 ns). These improvements are compatible with designs specified for the JS28F00AM29EWLA and do not introduce compatibility constraints.

Both parts maintain ROHS3 compliance and identical MSL ratings, supporting equivalent handling and storage requirements. Package dimensions and mounting specifications are identical, allowing direct PCB-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can MT28EW01GABA1LJS-0SIT replace JS28F00AM29EWLA in existing designs?

A: Yes. Both parts share identical memory capacity (1Gbit), organization (128M x 8, 64M x 16), parallel interface, supply voltage range (2.7V ~ 3.6V), operating temperature range (-40°C ~ 85°C), and 56-TFSOP package specifications. The substitute part offers improved access and write cycle times, which are compatible with the original design specifications.

Q: Are there differences in packaging or handling requirements?

A: Both parts use identical 56-TFSOP surface mount packages with matching MSL ratings of 3 (168 Hours). Handling, storage, and moisture sensitivity requirements are equivalent.

Q: What is the primary reason for substitution?

A: The JS28F00AM29EWLA is classified as Obsolete. The MT28EW01GABA1LJS-0SIT maintains Active product status, ensuring long-term availability and supply chain continuity.

Q: Are there compliance differences between the two parts?

A: Both parts are ROHS3 compliant and carry identical REACH and ECCN classifications, supporting equivalent regulatory requirements.

Q: How do the timing specifications compare?

A: The MT28EW01GABA1LJS-0SIT provides faster access time (95 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns). These improvements do not restrict substitution in applications designed for the original part specifications.

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