JS28F00AM29EWHA Equivalent & Substitute Parts

Part Overview

The JS28F00AM29EWHA 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 features 128M x 8 or 64M x 16 memory organization with 110 ns access time and operates across a 2.7V to 3.6V supply voltage range at temperatures from -40°C to 85°C.

The JS28F00AM29EWHA is classified as obsolete. Locating equivalent or substitute components becomes necessary when original stock is depleted or when design flexibility permits adoption of functionally compatible alternatives that maintain electrical and mechanical compatibility.

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 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 eligibility for the JS28F00AM29EWHA 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 configuration. The parallel interface architecture is mandatory. Package type must be identical: 56-TFSOP surface mount with 0.724" width and 18.40mm dimensions. Supply voltage range must encompass or match 2.7V to 3.6V. Operating temperature range must cover -40°C to 85°C minimum. RoHS3 compliance and MSL 3 rating are required for environmental and handling compatibility.

Access time and write cycle time may be equal to or faster than the original specification without functional impact. Product status (active or obsolete) does not affect electrical substitution validity but influences availability and long-term support considerations.

Parameter Comparison

Parameter	JS28F00AM29EWHA	MT28EW01GABA1HJS-0SIT	Compatibility
Memory Size	1Gbit	1Gbit	Equivalent
Memory Format	FLASH - NOR	FLASH - NOR	Equivalent
Memory Organization	128M x 8, 64M x 16	128M x 8, 64M x 16	Equivalent
Memory Interface	Parallel	Parallel	Equivalent
Access Time	110 ns	95 ns	Substitute Faster
Write Cycle Time	110 ns	60 ns	Substitute 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 (0.724", 18.40mm Width)	56-TFSOP (0.724", 18.40mm Width)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	3 (168 Hours)	3 (168 Hours)	Equivalent

Engineering Selection Recommendations

The MT28EW01GABA1HJS-0SIT qualifies as a direct substitute for the JS28F00AM29EWHA based on electrical and mechanical parameter equivalence. Both components share identical memory capacity, organization, interface architecture, package dimensions, voltage specifications, and temperature operating range.

The MT28EW01GABA1HJS-0SIT exhibits improved performance characteristics with 95 ns access time and 60 ns write cycle time, both faster than the original 110 ns specification. This performance enhancement presents no compatibility risk in applications designed for the original component.

The MT28EW01GABA1HJS-0SIT maintains active product status with Micron Technology Inc., ensuring ongoing availability and manufacturing support. Both components carry ROHS3 compliance and identical MSL 3 ratings, confirming equivalent environmental and handling requirements.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW01GABA1HJS-0SIT replace the JS28F00AM29EWHA in existing designs?

A: Yes. Both components are electrically and mechanically equivalent across all critical parameters: 1Gbit capacity, 128M x 8 or 64M x 16 organization, parallel interface, 56-TFSOP package, 2.7V to 3.6V supply voltage, and -40°C to 85°C operating temperature. The substitute exhibits faster access and write cycle times, which do not create compatibility issues.

Q: Are there packaging differences between these components?

A: No. Both components use identical 56-TFSOP surface mount packaging with 0.724" width and 18.40mm dimensions. Mounting footprints and PCB layout requirements are identical.

Q: What is the significance of the faster access time in the substitute part?

A: The MT28EW01GABA1HJS-0SIT provides 95 ns access time versus 110 ns in the original. Faster access time does not degrade system performance; it only improves timing margins. Applications designed for 110 ns access time operate correctly with 95 ns components.

Q: Do both components have the same voltage and temperature specifications?

A: Yes. Both operate across 2.7V to 3.6V supply voltage and -40°C to 85°C temperature range. Environmental and electrical operating conditions are identical.

Q: What is the difference in product status between these parts?

A: The JS28F00AM29EWHA is classified as obsolete, while the MT28EW01GABA1HJS-0SIT is active. Active status indicates ongoing manufacturing and availability from Micron Technology Inc.

Q: Are compliance certifications equivalent?

A: Yes. Both components are ROHS3 compliant with MSL 3 rating (168 hours). Regulatory and handling requirements are identical.

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