JS28F00AM29EWHB TR Equivalent & Substitute Parts

Part Overview

The JS28F00AM29EWHB TR is a 1Gbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., housed in a 56-TSOP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. The part operates across a wide temperature range (-40°C to 85°C) and is compliant with RoHS3 and REACH regulations, suitable for industrial and commercial embedded systems requiring non-volatile parallel memory storage.

Key Parameters

Parameter	Value
Memory Size	1Gbit
Memory Format	FLASH - NOR
Memory Organization	128M x 8, 64M x 16
Memory Interface	Parallel
Access Time	110 ns
Write Cycle Time	110 ns
Voltage Supply	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 JS28F00AM29EWHB TR is determined by strict equivalence across the following critical parameters:

Memory capacity and organization must remain identical at 1Gbit with 128M x 8 or 64M x 16 configurations. The parallel interface architecture is non-negotiable for direct board-level replacement without firmware or hardware redesign. Package geometry and pin count (56-TFSOP) must match exactly to ensure mechanical and electrical compatibility with existing PCB layouts. Supply voltage range (2.7V ~ 3.6V) and operating temperature range (-40°C ~ 85°C) establish the functional envelope for system operation. Access time and write cycle time parameters define performance characteristics; substitutes with equal or faster timing are functionally compatible.

The MT28EW01GABA1HJS-0SIT TR qualifies as a direct substitute based on identical memory capacity, organization, interface type, package configuration, voltage specifications, and temperature range. This part is manufactured by the same vendor (Micron Technology Inc.) and maintains full electrical and mechanical compatibility.

Parameter Comparison

Parameter	JS28F00AM29EWHB TR	MT28EW01GABA1HJS-0SIT TR	Compatibility
Memory Size	1Gbit	1Gbit	Identical
Memory Format	FLASH - NOR	FLASH - NOR	Identical
Memory Organization	128M x 8, 64M x 16	128M x 8, 64M x 16	Identical
Memory Interface	Parallel	Parallel	Identical
Access Time	110 ns	95 ns	Compatible (faster)
Write Cycle Time	110 ns	60 ns	Compatible (faster)
Voltage Supply	2.7V ~ 3.6V	2.7V ~ 3.6V	Identical
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Identical
Package Type	56-TFSOP (0.724", 18.40mm Width)	56-TFSOP (0.724", 18.40mm Width)	Identical
Mounting Type	Surface Mount	Surface Mount	Identical
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Identical
MSL Rating	3 (168 Hours)	3 (168 Hours)	Identical
Product Status	Obsolete	Active	Substitute is active

Engineering Selection Recommendations

The MT28EW01GABA1HJS-0SIT TR is the qualified substitute for the obsolete JS28F00AM29EWHB TR. Both parts 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 performance headroom without compromising compatibility.

The substitute part carries Active product status, ensuring long-term availability and supply chain continuity. Both parts maintain equivalent RoHS3 compliance and REACH status, satisfying regulatory requirements for industrial and commercial applications. Identical MSL ratings (3, 168 Hours) ensure equivalent moisture handling and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW01GABA1HJS-0SIT TR be used as a direct replacement for the JS28F00AM29EWHB TR without PCB modifications?

A: Yes. Both parts share identical package geometry (56-TFSOP), pin count, and electrical specifications. No PCB layout changes are required for substitution.

Q: What is the significance of the faster access and write cycle times in the substitute part?

A: The MT28EW01GABA1HJS-0SIT TR provides faster memory access (95 ns) and write operations (60 ns) compared to the original part (110 ns). This represents improved performance and is fully compatible with systems designed for the original timing specifications.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are RoHS3 compliant, REACH unaffected, and carry identical MSL ratings. Regulatory and environmental compliance requirements are equivalent.

Q: Why is the original part classified as obsolete?

A: The JS28F00AM29EWHB TR is marked obsolete by the manufacturer. The MT28EW01GABA1HJS-0SIT TR represents the active equivalent from Micron Technology Inc., ensuring continued availability and supply chain support.

Q: Are the memory organization options identical between both parts?

A: Yes. Both parts support 128M x 8 and 64M x 16 memory organization configurations, providing identical functional flexibility for system design.

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