JS28F00AP30EFA Equivalent & Substitute Parts

Part Overview

The JS28F00AP30EFA is a 1Gbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., housed in a 56-TSOP package. This component operates at 40 MHz with 110 ns access time and requires a 1.7V to 2V supply voltage. The part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The Axcell™ series designation and ROHS3 compliance ensure environmental standards compliance for legacy applications.

Key Parameters

Parameter	Value
Memory Size	1Gbit
Memory Organization	64M x 16
Memory Interface	Parallel
Clock Frequency	40 MHz
Access Time	110 ns
Write Cycle Time	110 ns
Voltage Supply Range	1.7V ~ 2V
Operating Temperature	-40°C ~ 85°C
Package Type	56-TFSOP
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the JS28F00AP30EFA is determined by the following critical parameters:

Memory capacity (1Gbit) and parallel interface architecture
Physical package compatibility (56-TFSOP form factor)
Surface mount mounting type
Operating temperature range (-40°C ~ 85°C)
FLASH NOR technology classification
ROHS3 and REACH compliance status

The MT28EW01GABA1HJS-0SIT qualifies as a substitute based on matching memory capacity, parallel interface, identical package dimensions, and equivalent environmental compliance. However, voltage supply range and access time specifications differ and must be evaluated for circuit compatibility.

Parameter Comparison

Parameter	JS28F00AP30EFA	MT28EW01GABA1HJS-0SIT	Compatibility Notes
Memory Size	1Gbit	1Gbit	Matched
Memory Organization	64M x 16	128M x 8, 64M x 16	64M x 16 mode available
Memory Interface	Parallel	Parallel	Matched
Clock Frequency	40 MHz	Not specified	Verify timing requirements
Access Time	110 ns	95 ns	Substitute faster; compatible
Write Cycle Time	110 ns	60 ns	Substitute faster; compatible
Voltage Supply Range	1.7V ~ 2V	2.7V ~ 3.6V	Different voltage requirements
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Matched
Package Type	56-TFSOP	56-TFSOP	Matched
Mounting Type	Surface Mount	Surface Mount	Matched
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Matched
Product Status	Obsolete	Active	Substitute actively manufactured

Engineering Selection Recommendations

The MT28EW01GABA1HJS-0SIT serves as the primary substitute for the obsolete JS28F00AP30EFA based on the following factors:

Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements
Identical 56-TFSOP package footprint and surface mount configuration enable direct PCB layout compatibility
Active product status of the substitute ensures long-term availability and supply chain continuity
Faster access time (95 ns vs. 110 ns) and write cycle time (60 ns vs. 110 ns) provide performance improvement
Memory organization supports 64M x 16 configuration, matching the original part's addressing scheme

The critical design consideration is the voltage supply range difference: the original part operates at 1.7V ~ 2V, while the substitute requires 2.7V ~ 3.6V. Circuit redesign or voltage regulation modifications are necessary if the original supply voltage cannot be adjusted to the substitute's requirements.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW01GABA1HJS-0SIT directly replace the JS28F00AP30EFA without circuit modifications?

A: Physical and functional compatibility exists for package, memory capacity, and interface. However, the voltage supply range differs significantly (1.7V ~ 2V vs. 2.7V ~ 3.6V). Direct replacement requires verification that the circuit can supply the substitute part's voltage requirements.

Q: Are the access time differences between these parts significant?

A: The substitute part is faster (95 ns vs. 110 ns access time). This improvement is backward compatible with designs expecting the original 110 ns specification. No timing violations occur when substituting a faster component in a circuit designed for the original part.

Q: Do both parts use identical pinout configurations?

A: Both components use the 56-TFSOP package. Verify pinout compatibility in the respective datasheets before PCB layout finalization, as package designation alone does not guarantee identical pin assignments.

Q: What is the impact of the memory organization difference (64M x 16 vs. 128M x 8, 64M x 16)?

A: The substitute part supports both 128M x 8 and 64M x 16 configurations. The 64M x 16 mode matches the original part's organization. Firmware or hardware configuration may be required to select the appropriate mode.

Q: Is the substitute part suitable for new designs?

A: Yes. The MT28EW01GABA1HJS-0SIT holds active product status, ensuring availability and manufacturing support. It is appropriate for both legacy replacement and new design applications, provided voltage supply requirements are met.

Q: Are there any compliance or certification differences between the parts?

A: Both parts maintain ROHS3 compliance and REACH unaffected status. No compliance barriers exist for substitution from a regulatory perspective.

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