JS28F00AP33TFA Equivalent & Substitute Parts

Part Overview

The JS28F00AP33TFA 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 a 105 ns access time and supports a supply voltage range of 2.3V to 3.6V. 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	1Gbit
Memory Format	FLASH - NOR
Memory Organization	64M x 16
Memory Interface	Parallel
Package / Case	56-TFSOP (0.724", 18.40mm Width)
Mounting Type	Surface Mount
Access Time	105 ns
Clock Frequency	40 MHz
Voltage - Supply	2.3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
MSL Rating	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the JS28F00AP33TFA is determined by the following critical parameters:

Primary Compatibility Criteria:

Memory capacity: 1Gbit
Memory technology: FLASH - NOR
Package type: 56-TFSOP
Memory interface: Parallel
Mounting type: Surface Mount

Secondary Compatibility Criteria:

Supply voltage range overlap (minimum 2.3V support required)
Operating temperature range: -40°C ~ 85°C
RoHS3 compliance
MSL rating: 3 or better

The MT28EW01GABA1HJS-0SIT meets all primary and secondary criteria, with the following distinctions: it supports memory organization of 128M x 8 or 64M x 16 (versus the main part's fixed 64M x 16), operates at 95 ns access time (faster than the main part's 105 ns), and has a supply voltage range of 2.7V ~ 3.6V (narrower than the main part's 2.3V ~ 3.6V).

Parameter Comparison

Parameter	JS28F00AP33TFA	MT28EW01GABA1HJS-0SIT
Manufacturer	Micron Technology Inc.	Micron Technology Inc.
Memory Size	1Gbit	1Gbit
Memory Format	FLASH - NOR	FLASH - NOR
Memory Organization	64M x 16	128M x 8, 64M x 16
Memory Interface	Parallel	Parallel
Package / Case	56-TFSOP	56-TFSOP
Mounting Type	Surface Mount	Surface Mount
Access Time	105 ns	95 ns
Clock Frequency	40 MHz	Not specified
Write Cycle Time	105 ns	60 ns
Voltage - Supply	2.3V ~ 3.6V	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

The MT28EW01GABA1HJS-0SIT is a direct substitute for the obsolete JS28F00AP33TFA. Both components are manufactured by Micron Technology Inc., share identical package specifications, and maintain full compliance with ROHS3 and REACH requirements.

The substitute part offers performance improvements: faster access time (95 ns versus 105 ns) and reduced write cycle time (60 ns versus 105 ns). The substitute's supply voltage range begins at 2.7V rather than 2.3V; applications requiring operation below 2.7V require design review.

The substitute part is currently in active production status, ensuring long-term availability and supply chain stability compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can MT28EW01GABA1HJS-0SIT replace JS28F00AP33TFA in existing designs?

A: Yes. Both parts share identical package geometry (56-TFSOP), pinout compatibility, and parallel interface architecture. The substitute operates at faster speeds and maintains the same operating temperature range and compliance certifications.

Q: What is the voltage compatibility consideration?

A: The main part supports 2.3V to 3.6V; the substitute supports 2.7V to 3.6V. If your application requires operation below 2.7V, the substitute is not compatible without circuit modification.

Q: Are there differences in memory organization?

A: The main part is fixed at 64M x 16 organization. The substitute supports both 128M x 8 and 64M x 16 configurations. For 64M x 16 operation, the parts are functionally equivalent.

Q: What is the product status difference?

A: The main part is obsolete; the substitute is in active production. This makes the substitute the recommended choice for new designs and ongoing component procurement.

Q: Are both parts RoHS compliant?

A: Yes. Both the JS28F00AP33TFA and MT28EW01GABA1HJS-0SIT are ROHS3 compliant and REACH unaffected.

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