JS28F128P30BF75A Equivalent & Substitute Parts

Part Overview

The JS28F128P30BF75A is a 128Mbit parallel NOR Flash memory IC manufactured by Micron Technology Inc., housed in a 56-TSOP package. This device is classified as obsolete, making substitute parts necessary for new designs and ongoing production support. The part operates with a 1.7V to 2V supply voltage and delivers 75 ns access time, suitable for embedded systems requiring non-volatile parallel memory storage.

Substiute Parts

JS28F128P30BF75A

Micron Technology Inc.In Stock: 1681JS28F128P30BF75A Datasheet

Current PartRFQ

MT28EW128ABA1LJS-0SIT

Micron Technology Inc.In Stock: 5258MT28EW128ABA1LJS-0SIT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the JS28F128P30BF75A is determined by the following critical parameters:

• Memory Capacity & Organization: 128Mbit total capacity with compatible organization (8M x 16 or 16M x 8)
• Technology & Interface: FLASH - NOR parallel interface required
• Package Compatibility: 56-TFSOP form factor for PCB layout compatibility
• Operating Temperature Range: -40°C to 85°C minimum requirement
• Compliance Standards: ROHS3 compliance and REACH unaffected status

The MT28EW128ABA1LJS-0SIT meets these substitution criteria. While it operates at a different voltage range (2.7V ~ 3.6V) and has a longer access time (95 ns), it maintains the same memory capacity, NOR Flash technology, parallel interface, and identical package footprint. The voltage difference requires circuit-level evaluation for compatibility.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW128ABA1LJS-0SIT is the qualified substitute for the obsolete JS28F128P30BF75A based on matching memory capacity, NOR Flash technology, parallel interface architecture, and identical package footprint. Both devices maintain ROHS3 compliance and identical operating temperature specifications.

The primary design consideration is the voltage supply differential: the original part operates at 1.7V to 2V, while the substitute requires 2.7V to 3.6V. This voltage incompatibility necessitates circuit redesign or voltage regulation modifications. The substitute's 95 ns access time is slower than the original 75 ns specification, which may impact timing-critical applications.

The MT28EW128ABA1LJS-0SIT is currently in active production status with 5209 units in stock, providing supply continuity for the obsolete JS28F128P30BF75A.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW128ABA1LJS-0SIT directly replace the JS28F128P30BF75A without circuit modifications?

A: Direct pin-for-pin replacement is possible due to identical 56-TFSOP packaging. However, the voltage supply range difference (1.7V-2V versus 2.7V-3.6V) requires circuit-level evaluation. Existing power supply designs may require modification or voltage regulation additions.

Q: What is the impact of the 95 ns access time versus the original 75 ns specification?

A: The substitute has a 20 ns longer access time. Applications with strict timing requirements must verify that system timing margins accommodate this slower access specification.

Q: Are both devices compatible with the same PCB layout?

A: Yes. Both devices use the 56-TFSOP package with identical 0.724" width and 18.40mm dimensions, allowing direct PCB footprint compatibility.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the JS28F128P30BF75A and MT28EW128ABA1LJS-0SIT are ROHS3 compliant with REACH unaffected status and identical Moisture Sensitivity Level 3 ratings.

Q: What is the memory organization difference between these parts?

A: The original part is organized as 8M x 16. The substitute supports both 16M x 8 and 8M x 16 configurations, providing organizational flexibility for system design.