Industrial-temperature DDR3 (-40 to +95 C): what we hold and how it maps

Industrial-temperature DRAM is the part of a memory line that customers ask about least often and suffer from most. Commercial −0 °C to +95 °C parts cover the overwhelming majority of board designs, so the industrial subset of most cross-reference tables is thin — and thin tables are exactly where a long-lifecycle programme gets stuck, because the part number that the design was qualified against may no longer be buyable in the grade the field requires.

This page records precisely what we hold in the industrial grade today, how the parts map to their originals, and what to verify before you qualify one. Nothing on this page is extrapolated: the figures come from the same cross-reference table that powers our public cross-reference search.

Industrial-temperature DDR3 we hold today

Both entries are x16 devices, which is the organisation most commonly requested for industrial control, gateway, metering and telecom line-card designs — boards where the DRAM sits on the same rail as the field interface and therefore inherits the wide-temperature requirement.

The same density in commercial grade, for contrast

The two parts below are the commercial equivalents of the industrial entries above. They share density, organisation, speed grade, voltage and package, and differ only in the recorded temperature grade:

That contrast is the whole point of keeping both rows in the table. A buyer comparing an industrial quote against a commercial quote is often looking at the same physical density and a different rated range — and the difference has to be visible in the documentation, not inferred from a price.

Our full industrial-grade portfolio

Industrial-grade supply in our table is not limited to DDR3. Across both rails we currently record 5 entries:

For designs that need both the memory and the power rail covered, our ADI µModule compatible line is engineered to the same second-source principle: PIN2PIN replacement, lot-level test documentation, and a quoted answer within 24 business hours.

How to read the part numbers — and the limit of that reading

Inside our table the industrial equivalents of the Nanya originals carry an added trailing I: the commercial NT5CC128M16JR-EK corresponds to NT5CC128M16JR-EKI, and NT5CC256M16ER-EK corresponds to NT5CC256M16ER-EKI. Our own-brand part numbers follow the same convention, which is why the industrial rows end in I.

That is a convention in our table, not a manufacturer-wide rule. Suffix schemes differ between vendors and between generations, and a suffix that looks like a temperature marker can indicate a package or die revision instead. Treat the naming pattern as a search hint and confirm the grade against your own approved-vendor list and the supplier's documentation.

What to verify before you qualify

• Rated range vs field range. A −40 °C to +95 °C rating is a component-level rating; the field temperature at the DRAM package depends on airflow, board layout and neighbouring heat sources.
• Refresh and timing behaviour at temperature. Compare the timing parameters you rely on against the industrial part's specification, not against the commercial part you are replacing.
• Lot traceability. Ask for the inspection and burn-in records that accompany the actual shipment, not a generic certificate.
• Honest sourcing statement. Ask whether the part is original, graded, or own-brand. We publish the distinction rather than blur it, and we will say which of the three a given quote refers to.
• Documentation closure. RoHS and REACH documentation is supplied on request; we do not claim third-party certification we cannot evidence.

What we are not claiming

We do not claim that an industrial-grade entry is a differently designed die from its commercial counterpart, and we do not publish temperature-performance curves for parts we have not characterised. What we can stand behind is what our table records: the density, organisation, speed grade, voltage, package and rated range of each entry, plus lot-level test records for the shipment in question. If a design needs a claim beyond that, say so in your enquiry and we will tell you whether we can support it.