Alternatives to STMicroelectronics M27C4002-10F1
STMicroelectronics M27C4002-10F1 and its qualified second sources, compared on form/fit/function, stock, lifecycle and price — the same checks Parter runs inside a BOM.
 M27C4002-10F1STMicroelectronics | AT27C4096-90PUMicrochip Technology | AT27C4096-55PUMicrochip Technology | +1more | |
|---|---|---|---|---|
| FFF Compatibility | Pins map identically to the original layout, and the 40-pin DIP footprint matches the existing socket perfectly.Housed in a plastic DIP (PDIP) package instead of windowed ceramic (CDIP), lacking the quartz window and making it OTP rather than UV-erasable.Organized identically as 256K x 16 (4Mbit) parallel memory operating on a 5V supply with equivalent electrical characteristics. | Pin placement and 40-pin DIP socket spacing match the original design identically.Utilizes a plastic DIP package lacking the quartz window required for ultraviolet light erasure.Matches the exact 4Mbit (256K x 16) parallel structure and 5V supply specs, outperforming on speed. | ||
 AI Summary | M27C4002-10F1 by STMicroelectronics: EPROM - UV Memory IC 4Mbit Parallel 100 ns 40-CDIP Frit Seal with Window. | The AT27C4096-90PU is the most reliable, active, drop-in replacement for the obsolete M27C4002-10F1. It matches the original pinout, organization, and voltage but trades the UV-erasable windowed ceramic package for a standard plastic OTP package. This makes it ideal for production, though it cannot be erased and reprogrammed once written.
| This active sibling variant offers an upgraded 55 ns access speed for high-performance legacy designs. It is physically and functionally compatible with the original part, but uses an OTP plastic DIP package instead of the windowed ceramic style. This is an excellent choice if your system benefits from faster memory access.
| |
| Lifecycle Status | Obsolete | Unknown | Unknown | |
| Market Availability | Non-stock | Unknown | Unknown | |
| REACH | REACH | Unknown | Unknown | |
| RoHS | RoHS | Unknown | Unknown | |
| Description | EPROM - UV Memory IC 4Mbit Parallel 100 ns 40-CDIP Frit Seal with Window | The AT27C4096-90PU is the most reliable, active, drop-in replacement for the obsolete M27C4002-10F1. It matches the original pinout, organiz | This active sibling variant offers an upgraded 55 ns access speed for high-performance legacy designs. It is physically and functionally com | |
| Manufacturer | STMicroelectronics | Microchip Technology | Microchip Technology | |
| Type | Memory | Component | Component | |
| Datasheet | Open | N/A | N/A | |
| Lead Time | 17 weeks | Unknown | Unknown | |
| Country of Origin | MY | - | - | |
| Export Control Class Number | OBSOLETE | EAR99 | EAR99 | |
| HTSUS Code | 8542.32.0061 | - | - | |
| Moisture Sensitivity Level | 3 (168 Hours) | - | - | |
| Technology | EPROM - UV | - | - | |
| Access Time | 100 ns | - | - | |
| Memory Size | 4Mbit | - | - | |
| Memory Type | Non-Volatile | - | - | |
| Memory Format | EPROM | - | - | |
| Mounting Type | Through Hole | - | - | |
| Package / Case | 40-CDIP (0.600", 15.24mm) Window | - | - | |
| Memory Interface | Parallel | - | - |
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Related parts
| Part | Market availability | Lifecycle | Alternatives available |
|---|---|---|---|
 M27C256B-10F1STMicroelectronics | Non-stock | Obsolete | 3Alternatives availableSee Alternatives |
| M27C256B-15F1STMicroelectronics | Discontinued | Obsolete | 4Alternatives availableSee Alternatives |
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Frequently asked questions
Yes. The STMicroelectronics M27C4002-10F1 is marked obsolete, so the manufacturer has discontinued it and any remaining supply is limited to distributor stock. The qualified second sources on this page are active parts you can design in today.
The closest qualified second sources for the STMicroelectronics M27C4002-10F1 are the AT27C4096-90PU (Microchip Technology) and the AT27C4096-55PU (Microchip Technology), out of 3 matched alternatives in total. Each is compared against the original on fit, form and function in the table above.
Not always. The alternatives to the M27C4002-10F1 are matched on function but can differ in package, pinout or a key parameter, so review the fit/form/function notes in the table and the datasheet before designing one in.
The M27C4002-10F1 (STMicroelectronics) is a part in the Memory category. This page lists qualified, cross-referenced replacements for it with a side-by-side comparison.
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