JS28F512P30EFA Equivalent & Substitute Parts

Part Overview

The JS28F512P30EFA 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 requires a 1.7V to 2V supply voltage. The part is classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

JS28F512P30EFA

Micron Technology Inc.In Stock: 7284JS28F512P30EFA Datasheet

Current PartRFQ

MT28EW512ABA1HJS-0SIT

Micron Technology Inc.In Stock: 18519MT28EW512ABA1HJS-0SIT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the JS28F512P30EFA is determined by the following critical parameters:

• Memory capacity: 512Mbit minimum
• Memory technology: FLASH - NOR format
• Package compatibility: 56-TSOP form factor with matching pinout
• Memory interface: Parallel interface requirement
• Operating temperature range: -40°C to 85°C minimum
• Surface mount capability: Required for PCB integration

The MT28EW512ABA1HJS-0SIT qualifies as a substitute based on matching memory capacity, technology, package form factor, and operating temperature range. However, voltage supply requirements differ between the main part and substitute, requiring circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

The MT28EW512ABA1HJS-0SIT is electrically and mechanically compatible with the JS28F512P30EFA for applications where voltage supply adjustment is feasible. Both components maintain ROHS3 compliance and identical operating temperature specifications. The substitute part offers improved access and write cycle times, providing performance headroom in timing-critical applications.

Direct substitution without circuit modification is not recommended due to the voltage supply range difference (1.7V–2V versus 2.7V–3.6V). System designs must incorporate appropriate voltage regulation or level-shifting circuitry to accommodate the substitute part's higher supply voltage requirement.

The substitute part maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete main part.

Frequently Asked Questions (FAQ)

Q: Can the MT28EW512ABA1HJS-0SIT be used as a direct pin-for-pin replacement?

A: The 56-TSOP package pinout is compatible, but the voltage supply requirement difference necessitates circuit-level modifications. Direct socket substitution without power supply adjustment will result in component failure.

Q: What is the primary reason for substitution?

A: The JS28F512P30EFA is classified as obsolete. The MT28EW512ABA1HJS-0SIT provides equivalent memory capacity, technology, and package form factor while maintaining active product status for continued procurement.

Q: Are there timing compatibility concerns?

A: The substitute part provides faster access time (95 ns versus 110 ns) and faster write cycle time (60 ns versus 110 ns). These improvements are backward-compatible with designs specified for the original part.

Q: Do both parts meet the same compliance standards?

A: Yes. Both components are ROHS3 compliant with identical moisture sensitivity levels (MSL 3, 168 hours) and REACH unaffected status.

Q: What circuit modifications are required for substitution?

A: Power supply voltage regulation must be adjusted from the 1.7V–2V range to the 2.7V–3.6V range required by the substitute part. Consult the respective datasheets for detailed voltage sequencing and decoupling requirements.