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JS28F256M29EWHA
256 Mbit parallel NOR flash memory with x8/x16 interface
Specifications
Key details
| Part Number | JS28F256M29EWHA |
|---|---|
| Manufacturer | Micron Technology (Intel/Numonyx legacy) |
| Category | Parallel NOR Flash |
| Lifecycle Status | Obsolete |
| Series | M29EW |
| Package / Case | 56-pin TSOP-I |
| Pin Count | 56 |
| Operating Temperature | -40°C to +85°C; confirm suffix grade |
| Last Verified | 2026-07-22 |
Overview
Part information
JS28F256M29EWHA Overview
JS28F256M29EWHA is a Micron Technology (Intel/Numonyx legacy) 256 Mbit parallel NOR flash memory with x8/x16 interface supplied in 56-pin TSOP-I. This page uses the exact orderable code because package, grade, temperature and option suffixes can change compatibility.
Key Technical Specifications
| Density | 256 Mbit |
|---|---|
| Interface | Asynchronous parallel x8/x16 |
| Architecture | Uniform-block parallel NOR |
| Access Time | as specified by suffix and datasheet |
| Supply Class | 3 V core, 1.8 V to 3.6 V I/O |
Package and Ordering Notes
The listed package is 56-pin TSOP-I with 56 pins, leads, lands or contacts. The featured image is a generic package illustration for form-factor identification and is not an actual date-code or lot photograph. Lifecycle is recorded as Obsolete; confirm current factory support and last-time-buy constraints before design-in.
Sourcing Guidance
JS28F256M29EWHA is obsolete or discontinued. Require traceability, date-code, package-marking and storage-condition checks for remaining stock.
For an accurate quotation, include the full MPN, target quantity, acceptable date-code range, packaging format and destination. Icearth can help review traceability documents, label photos and electrical/package alignment before order placement.
Manufacturer Documentation
Technical values were checked against Micron Technology (Intel/Numonyx legacy) documentation. Use the linked datasheet as the controlling source and re-check revisions before PCB release or firmware qualification.
JS28F256M29EWHA FAQ
What is JS28F256M29EWHA?
JS28F256M29EWHA is a Micron Technology (Intel/Numonyx legacy) 256 Mbit parallel NOR flash memory with x8/x16 interface. It belongs to the M29EW series.
What are the key specifications of JS28F256M29EWHA?
Density is 256 Mbit, and Interface is Asynchronous parallel x8/x16. Use the linked manufacturer datasheet for limits, test conditions and revision-controlled values.
What package does JS28F256M29EWHA use?
JS28F256M29EWHA is supplied in 56-pin TSOP-I with 56 pins, leads, lands or contacts. Verify the exact footprint and ordering suffix before PCB release.
Is JS28F256M29EWHA still in production?
JS28F256M29EWHA is obsolete or discontinued. Any remaining stock should be checked for traceability, date code, package marking and storage history.
What should be checked before sourcing JS28F256M29EWHA?
Confirm the complete MPN, electrical ratings, package, temperature grade and required quantity. Possible alternatives include Select a current parallel NOR flash after verifying command set, boot-block layout, voltage, timing and TSOP pinout, but compatibility must be verified independently.
Sourcing notes
Lifecycle and sourcing review
Obsolete
This part has a legacy lifecycle status. Submit the exact MPN, quantity, delivery destination and date-code requirements for a sourcing review.
JS28F256M29EWHA is obsolete or discontinued. Require traceability, date-code, package-marking and storage-condition checks for remaining stock.
Alternatives
Potential alternative part numbers
Verify package, pinout, voltage, firmware behavior and qualification before substitution.