JS28F512P30TFA Equivalent & Substitute Parts

Part Overview

The JS28F512P30TFA is a 512Mbit 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 is designed for non-volatile storage applications requiring parallel interface connectivity. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Key Parameters

Parameter	Value
Memory Size	512Mbit
Memory Format	FLASH - NOR
Memory Organization	32M x 16
Memory Interface	Parallel
Package / Case	56-TFSOP (0.724", 18.40mm Width)
Mounting Type	Surface Mount
Access Time	110 ns
Clock Frequency	40 MHz
Voltage Supply Range	1.7V ~ 2V
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the JS28F512P30TFA is determined by the following critical parameters:

Memory Capacity: 512Mbit capacity requirement
Memory Technology: FLASH - NOR technology
Package Compatibility: 56-TSOP surface mount package with matching physical dimensions
Memory Interface: Parallel interface support
Compliance Standards: ROHS3 compliance and REACH unaffected status

The MT28EW512ABA1HJS-0SIT meets these core substitution criteria. Both parts share identical memory capacity, technology, package form factor, and compliance certifications. Differences in access time, clock frequency, and supply voltage represent performance variations that must be evaluated within the context of the specific application circuit design.

Parameter Comparison

Parameter	JS28F512P30TFA	MT28EW512ABA1HJS-0SIT
Manufacturer	Micron Technology Inc.	Micron Technology Inc.
Memory Size	512Mbit	512Mbit
Memory Format	FLASH - NOR	FLASH - NOR
Memory Organization	32M x 16	64M x 8, 32M x 16
Memory Interface	Parallel	Parallel
Package / Case	56-TFSOP (0.724", 18.40mm Width)	56-TFSOP (0.724", 18.40mm Width)
Mounting Type	Surface Mount	Surface Mount
Access Time	110 ns	95 ns
Clock Frequency	40 MHz	Not specified
Write Cycle Time	110 ns	60 ns
Voltage Supply Range	1.7V ~ 2V	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The MT28EW512ABA1HJS-0SIT is the qualified substitute for the obsolete JS28F512P30TFA based on matching core specifications: identical 512Mbit capacity, FLASH - NOR technology, 56-TSOP package geometry, and parallel interface architecture. Both components maintain ROHS3 compliance and identical moisture sensitivity ratings.

The substitute part offers improved performance characteristics with 95 ns access time and 60 ns write cycle time compared to the original 110 ns specifications. However, the supply voltage range differs significantly: the substitute operates at 2.7V ~ 3.6V versus the original 1.7V ~ 2V. This voltage differential requires circuit-level evaluation to confirm compatibility with existing power supply infrastructure and signal conditioning requirements.

Both parts are manufactured by Micron Technology Inc., ensuring consistent quality standards and documentation availability. The substitute part maintains active product status with established supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can MT28EW512ABA1HJS-0SIT directly replace JS28F512P30TFA in existing PCB assemblies?

A: Physical package compatibility is confirmed—both use 56-TSOP surface mount packaging with identical footprints. However, the supply voltage range difference (1.7V ~ 2V versus 2.7V ~ 3.6V) requires verification that the circuit power distribution and signal levels are compatible with the substitute part's operating specifications.

Q: What are the key differences between these two parts?

A: The primary differences are supply voltage range, access time (95 ns versus 110 ns), and write cycle time (60 ns versus 110 ns). The substitute part offers faster performance but requires higher supply voltage. Memory organization flexibility in the substitute (64M x 8 or 32M x 16) provides additional configuration options.

Q: Are both parts RoHS compliant?

A: Yes, both JS28F512P30TFA and MT28EW512ABA1HJS-0SIT are ROHS3 compliant with identical MSL ratings of 3 (168 Hours).

Q: Why is the original part listed as obsolete?

A: The JS28F512P30TFA is classified as obsolete by the manufacturer, indicating discontinued production. The MT28EW512ABA1HJS-0SIT maintains active product status with ongoing manufacturing support.

Q: What packaging format is supplied for the substitute part?

A: The MT28EW512ABA1HJS-0SIT is supplied in Tray packaging, whereas the original part packaging format is not specified in available documentation.

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