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MRAM and ReRAM have credible automotive opportunities, but the evidence is specific to particular foundry processes and products—not proof that either technology, or a supplier’s entire portfolio, is automatically automotive-qualified. TSMC reports automotive qualification for 22 nm and 16 nm embedded MRAM and for a second-generation 22 nm embedded ReRAM process. Everspin identifies automotive applications for specific MRAM products. Those statements show opportunity and maturity at defined levels; they do not establish broad vehicle adoption or a general performance advantage for one memory type.
What “automotive-grade” means for memory
AEC-Q100 is a qualification reference for packaged integrated circuits, not a blanket certification of a memory technology or every chip made with a process. Renesas describes it as “a failure mechanism based stress test qualification for packaged integrated circuits” and says qualified products are identified in their datasheets; it also cautions that not all products are intended for automotive use. Renesas: What is AEC-Q100?
For an actual vehicle design, check the exact component’s current datasheet and qualification documentation. A foundry’s process-level qualification statement does not by itself qualify each customer-designed chip, establish its functional-safety case, or guarantee lifecycle support or availability.
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What suppliers report about MRAM and ReRAM
| Technology and process | Reported status | What the claim establishes |
|---|---|---|
| TSMC eMRAM, 22 nm and 16 nm | AEC-Q100 automotive-qualified and in production, according to TSMC’s current technology page, accessed in 2026. | Foundry-reported process status; not automatic qualification of every customer implementation. TSMC embedded NVM technology |
| TSMC eMRAM, 12 nm | Automotive-grade development underway, according to the same page. | Development status, not a claim of qualification or production. |
| TSMC eRRAM, second-generation 22 nm | Automotive-qualified, according to TSMC’s current technology page, accessed in 2026. | Qualification claim for this process generation; it does not establish customer-chip qualification. TSMC embedded NVM technology |
| TSMC eRRAM, third-generation N12e | Commercial volume production, according to the same page. | Production maturity is distinct from the page’s separate automotive-qualification statement for second-generation 22 nm eRRAM. |
| TSMC eRRAM, 6 nm | Development underway, according to the same page. | Development status; no automotive qualification is established by that statement. |
These status descriptions should not be collapsed into a single claim that “ReRAM is automotive-qualified.” The qualification, production, and development statements apply to different process generations and nodes. Likewise, TSMC’s reported eMRAM status does not establish that all MRAM processes or commercial parts share it.
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Where MRAM may fit in vehicle electronics
Everspin describes MRAM as suitable for several automotive roles, including ECU data, advanced transmission control, real-time sensor-data recording, parameter storage, in-car data logging, multimedia, over-the-air updates, and powertrain modules. These are supplier-described applications, not independently verified vehicle deployments or named OEM design wins. Everspin automotive MRAM
Such use cases point to memory functions where retaining data through power loss, recording changing data, or storing parameters may matter. They are possible application areas, not evidence that MRAM is used in every system listed or that it outperforms ReRAM for those tasks.
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- Reliably clamp the battery clips onto the positive and negative terminals of the spare battery (red clip connects to the positive terminal, black clip connects to the negative terminal). Connect the tool's OBD connector to the vehicle's OBD connector. If the connection is successful, the green LED will light up.
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What the Everspin automotive specifications do—and do not—show
Everspin’s automotive page describes an operating range of -40°C to 125°C and says an AEC-Q100 Grade 1 MRAM retains data for 20 years over that range. It identifies the MR2A08A as a 4 Mb device with an 8-bit parallel interface and AEC-Q100 Grade 1 qualification. These are supplier statements about a specific product and stated conditions; verify the current datasheet for the exact part before using the figures in a design decision. They should not be generalized to every MRAM device. Everspin automotive MRAM
What is not established about MRAM versus ReRAM
The available supplier and foundry statements do not provide a fair quantitative head-to-head comparison of automotive MRAM and ReRAM for cost, endurance, write speed, reliability, or deployment in production vehicles. They also do not quantify automotive market size or forecast demand. A claim that one technology is categorically faster, cheaper, more durable, or more widely adopted would go beyond this evidence.
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For a technology or component selection, compare the exact candidate parts or process options against the system requirements: qualification documentation, memory role, operating conditions, retention needs, interface, production status, and lifecycle commitments. Where the claim concerns a custom chip, obtain documentation for that implementation rather than relying on a process-level description alone.
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