JS28F256P33BFE
256 Mbit parallel NOR flash memory with x8/x16 interface
Key details
| Part Number | JS28F256P33BFE |
|---|---|
| Manufacturer | Micron Technology (Intel/Numonyx legacy) |
| Category | Parallel NOR Flash |
| Lifecycle Status | Obsolete |
| Series | P33 |
| Package / Case | 56-pin TSOP-I |
| Pin Count | 56 |
| Operating Temperature | -40°C to +85°C; confirm suffix grade |
| Last Verified | 2026-07-22 |
Part information
JS28F256P33BFE Overview
JS28F256P33BFE 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 | Bottom-boot block architecture |
| Access Time | confirm exact E speed suffix |
| Supply Class | 1.8 V core / 3 V I/O class |
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
JS28F256P33BFE is obsolete or discontinued.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.
JS28F256P33BFE FAQ
What is JS28F256P33BFE?
JS28F256P33BFE is a Micron Technology (Intel/Numonyx legacy) 256 Mbit parallel NOR flash memory with x8/x16 interface. It belongs to the P33 series.
What are the key specifications of JS28F256P33BFE?
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 JS28F256P33BFE use?
JS28F256P33BFE 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 JS28F256P33BFE still in production?
JS28F256P33BFE 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 JS28F256P33BFE?
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.
How JS28F256P33BFE differs from related orderable parts
JS28F256P33BFE belongs to the P33 family. Compared with JS28F128P33BF70A, the recorded differences include functional description: 256 Mbit parallel NOR flash memory with x8/x16 interface versus 128 Mbit parallel NOR flash memory with x8/x16 interface; Density: 256 Mbit, a higher recorded value than 128 Mbit; and Access Time: confirm exact E speed suffix rather than 70 ns. A shared family name does not establish pin, firmware or qualification compatibility.
| Part number | Recorded function | Package | Pins / contacts | Temperature | Lifecycle |
|---|---|---|---|---|---|
| JS28F256P33BFE | 256 Mbit parallel NOR flash memory with x8/x16 interface | 56-pin TSOP-I | 56 pins, leads or contacts | -40°C to +85°C; confirm suffix grade | Obsolete |
| JS28F128P33BF70A | 128 Mbit parallel NOR flash memory with x8/x16 interface | 56-pin TSOP-I | 56 pins, leads or contacts | -40°C to +85°C; confirm suffix grade | Obsolete |
| JS28F256P33TFE | 256 Mbit parallel NOR flash memory with x8/x16 interface | 56-pin TSOP-I | 56 pins, leads or contacts | -40°C to +85°C; confirm suffix grade | Obsolete |
| JS28F128P33TF70A | 128 Mbit parallel NOR flash memory with x8/x16 interface | 56-pin TSOP-I | 56 pins, leads or contacts | -40°C to +85°C; confirm suffix grade | Obsolete |
For an RFQ or AVL review, quote the complete JS28F256P33BFE code and verify the manufacturer ordering table, package drawing, packing method and revision. The related numbers above are comparison references, not declared drop-in replacements.
Exact order-code identity for JS28F256P33BFE
For BOM, label, AVL and RFQ matching, preserve these visible code segments: opening alphabetic sequence JS; middle numeric sequence two eight; middle alphabetic sequence F; middle numeric sequence two five six; middle alphabetic sequence P; middle numeric sequence three three; and terminal alphabetic sequence BFE. The nearest published comparison codes are JS28F128P33BF70A; JS28F256P33TFE; and JS28F128P33TF70A. Compare every segment because a changed character can identify a different density, voltage, package, temperature, qualification or packing option.
Do not shorten the requested code to P33 or remove its terminal characters. Ask the supplier to reproduce the complete code on the quotation and provide label or traceability evidence when exact suffix matching is mandatory.
Lifecycle and sourcing review
This part has a legacy lifecycle status. Submit the exact MPN, quantity, delivery destination and date-code requirements for a sourcing review.
JS28F256P33BFE is obsolete or discontinued. Require traceability, date-code, package-marking and storage-condition checks for remaining stock.
Potential alternative part numbers
Verify package, pinout, voltage, firmware behavior and qualification before substitution.