JS28F00AM29EWHE Equivalent & Substitute Parts

Part Overview

The JS28F00AM29EWHE is a 1Gbit NOR Flash memory IC manufactured by Micron Technology Inc., designed for parallel interface applications in 56-TSOP surface mount packaging. This component is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and production continuity. The part operates across industrial temperature ranges (-40°C to 85°C) with supply voltage specifications of 2.7V to 3.6V, serving applications requiring non-volatile parallel flash 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 JS28F00AM29EWHE is determined by strict equivalence across the following critical parameters:

Memory capacity and organization must remain constant at 1Gbit with 128M x 8 or 64M x 16 configurations. The parallel interface architecture is non-negotiable for system compatibility. Package specifications must match exactly: 56-TFSOP surface mount with identical physical dimensions (0.724", 18.40mm width). Supply voltage range (2.7V ~ 3.6V) and operating temperature range (-40°C ~ 85°C) must be maintained. RoHS3 compliance and MSL rating of 3 must be preserved.

The MT28EW01GABA1HJS-0SIT qualifies as a direct substitute based on matching all mandatory parameters. Performance improvements in access time (95 ns versus 110 ns) and write cycle time (60 ns versus 110 ns) represent enhanced specifications that do not compromise backward compatibility.

Parameter Comparison

Parameter	JS28F00AM29EWHE	MT28EW01GABA1HJS-0SIT
Manufacturer	Micron Technology Inc.	Micron Technology Inc.
Memory Size	1Gbit	1Gbit
Memory Format	FLASH - NOR	FLASH - NOR
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
Voltage Supply	2.7V ~ 3.6V	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	56-TFSOP	56-TFSOP
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 MT28EW01GABA1HJS-0SIT is the qualified substitute for the obsolete JS28F00AM29EWHE. Both components are manufactured by Micron Technology Inc. and maintain identical electrical and mechanical specifications across all critical parameters. The substitute part carries Active product status, ensuring continued availability and supply chain support.

Both parts maintain ROHS3 compliance and identical MSL ratings, satisfying regulatory and manufacturing process requirements. The substitute demonstrates improved performance characteristics in access time and write cycle time while maintaining full backward compatibility with existing system designs.

Frequently Asked Questions (FAQ)

Q: Can MT28EW01GABA1HJS-0SIT be used as a direct replacement for JS28F00AM29EWHE?

A: Yes. Both parts share identical memory capacity (1Gbit), organization (128M x 8, 64M x 16), parallel interface architecture, package specifications (56-TFSOP), voltage supply range (2.7V ~ 3.6V), and operating temperature range (-40°C ~ 85°C). The substitute part is pin-compatible and functionally equivalent.

Q: What are the performance differences between these parts?

A: The MT28EW01GABA1HJS-0SIT offers improved access time (95 ns versus 110 ns) and write cycle time (60 ns versus 110 ns). These enhancements do not affect compatibility and represent performance upgrades suitable for existing applications.

Q: Are there packaging differences between these parts?

A: No. Both parts use identical 56-TFSOP surface mount packaging with matching physical dimensions (0.724", 18.40mm width). PCB layout and assembly processes require no modification.

Q: Do both parts meet the same compliance standards?

A: Yes. Both parts are ROHS3 compliant with MSL rating 3 (168 Hours). Regulatory and manufacturing requirements are identical.

Q: Why is the original part listed as obsolete?

A: The JS28F00AM29EWHE has reached end-of-life status. The MT28EW01GABA1HJS-0SIT maintains active production status and serves as the current equivalent offering from Micron Technology Inc.

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