One quotation describes a chip as industrial; another describes a candidate as automotive. Should the buyer accept a substitution based on temperature range or an assumption that one grade is simply better? Start with the actual ordering codes and project requirements.
A Grade Label Is Not a Complete Specification
TI’s part-ratings information describes automotive-classified products in relation to applicable AEC-Q100, AEC-Q101 or other automotive specifications. The applicable qualification depends on the product. Check the specific device rather than applying one qualification statement to every component.
Temperature Alone Does Not Establish Qualification
Matching temperature ranges do not establish identical qualification, documentation or project approval. Read the manufacturer’s temperature definitions and have engineering confirm the conditions required by the design. Do not generalize one device’s ratings across a whole family.
Compare Ordering Codes and Records
Retain every suffix. Review the datasheet, relevant manufacturer qualification information and required project documents. “Automotive grade” written on a quotation is not a substitute for checking what the documentation covers.
Grade Changes Need Approval
List any proposed grade change separately. Engineering and quality should review package, pinout, electrical conditions and project approval status. Procurement should not authorize a replacement solely because of its grade description.
Provide the full code, quantity, application conditions and required records with the enquiry. Confirm the specific supply and documentation before comparing price and delivery.
Source: TI Part ratings: https://www.ti.com/quality-reliability/certifications-standards/part-ratings.html
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