Component comparison · Last verified 2026-08-08
MT25QL128ABA1EW7-0SIT and MT25QL128ABA8E12-0SIT are 128Mb, 3V, x4 SPI Serial NOR devices in the same Micron family, but they are not footprint-equivalent. Choose the W7 option for its 8-contact W-PDFN and HOLD# pin configuration; choose the 12 option only when the board supports its 24-ball T-PBGA and RESET# plus HOLD# configuration.
MT25QL128ABA1EW7-0SIT vs MT25QL128ABA8E12-0SIT specifications
| Specification | MT25QL128ABA1EW7-0SIT | MT25QL128ABA8E12-0SIT |
|---|---|---|
| Product class | Serial NOR Flash Memory | Serial NOR Flash Memory |
| Density | 128Mb (16MB) | 128Mb (16MB) |
| Voltage range | 2.7V to 3.6V | 2.7V to 3.6V |
| Catalog width | x4 | x4 |
| Interface | SPI multiple-I/O Serial NOR | SPI multiple-I/O Serial NOR |
| Device generation | First generation | First generation |
| Die revision | Revision A | Revision A |
| Pin configuration option | Option 1: HOLD# pin | Option 8: RESET# and HOLD# pins |
| Sector size code | E: 64KB | E: 64KB |
| Package code | W7 | 12 |
| Package form | 8-contact W-PDFN | 24-ball T-PBGA (5 x 5 array) |
| Package dimensions | 6.00 mm x 5.00 mm x 0.80 mm | 6.00 mm x 8.00 mm x 1.20 mm |
| Operating temperature | -40°C to +85°C | -40°C to +85°C |
| Micron catalog status | Production | Production |
| Component configuration | 32Mb x4 | 32Mb x4 |
Key differences
The pin-option field changes the available control signals
Micron's Serial NOR numbering guide maps option 1 to a HOLD# pin and option 8 to RESET# plus HOLD# pins. The schematic, boot-state assumptions, controller wiring and recovery sequence must therefore be reviewed against the exact package pinout before either order code is approved.
W7 and 12 require different PCB footprints and assembly flows
Package code W7 is an 8-contact W-PDFN at 6 mm x 5 mm, while code 12 is a 24-ball T-PBGA at 6 mm x 8 mm. They differ in contact count, footprint, inspection method and rework process, so they are alternate package selections rather than drop-in replacements.
Can these parts be interchanged?
MT25QL128ABA1EW7-0SIT and MT25QL128ABA8E12-0SIT share the same 128Mb, 3V, x4 SPI Serial NOR family identity, operating grade and 32Mb x4 component configuration. They are not footprint-compatible and must not be substituted without a board redesign. Verify the revision-controlled datasheet, exact W7 or 12 package drawing, signal assignment, RESET#/HOLD# behavior, land pattern, assembly process, boot-ROM support, timing mode and current Micron orderability for the complete MPN before qualification.
- Electrical ratings and operating conditions
- Package dimensions, footprint and pinout
- Interface, timing and firmware behavior
- Temperature and qualification grade
- Lifecycle status and current documentation revision
MT25QL128ABA1EW7-0SIT vs MT25QL128ABA8E12-0SIT FAQ
What is the main difference between MT25QL128ABA1EW7-0SIT and MT25QL128ABA8E12-0SIT?
The exact order codes select different control-pin and package options. The W7 part uses option 1 with HOLD# in an 8-contact W-PDFN. The 12 part uses option 8 with RESET# plus HOLD# in a 24-ball T-PBGA.
Are MT25QL128ABA1EW7-0SIT and MT25QL128ABA8E12-0SIT drop-in replacements?
No. Their 8-contact W-PDFN and 24-ball T-PBGA packages require different footprints and assembly processes. Their pin-option fields also differ, so any change requires schematic, PCB, firmware and qualification review.
Which part provides a RESET# pin option?
MT25QL128ABA8E12-0SIT uses Micron pin option 8, which the official numbering guide defines as RESET# plus HOLD#. MT25QL128ABA1EW7-0SIT uses option 1, defined as a HOLD# pin option.
Do the two parts have the same memory density and voltage?
Yes. Both complete codes identify 128Mb MT25QL devices in the 2.7V to 3.6V range, and Micron's catalog records identify the same x4 SPI family context. This functional overlap does not make the packages interchangeable.
What must be checked before changing between W7 and 12?
Review the exact package drawing, land pattern, ball or contact map, RESET#/HOLD# behavior, boot firmware, controller support, assembly and inspection process, thermal limits, data-sheet revision and current factory orderability for the full manufacturer part number.
Sources and verification
- Micron MT25QL128ABA1EW7-0SIT exact part detail
- Micron MT25QL128ABA8E12-0SIT exact part detail
- Micron Serial NOR Flash Part Numbering System
- Micron Serial NOR part catalog
This comparison supports preliminary selection and sourcing review. Similar specifications do not establish drop-in compatibility. Confirm the complete orderable code and current manufacturer documentation before design release or purchase.
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