How to Evaluate Component Alternatives

Five Checks Before You Approve an Alternative

Work through these five checks for each alternative. If any check fails, ask for another option before you approve the change.

Electrical parameters

Compare the values that drive the circuit: voltage, current, and the ratings that set the operating limits. A part that looks the same on the outside can differ where it matters.

Package and footprint

Check the package type and the pad layout. A different footprint can mean a new board layout, even when the part is electrically close.

Pinout

Check the pin order and the function of each pin. A pin that moves can break the design, even when the package looks identical.

Temperature range

Check the temperature range against the conditions where the product will work. A commercial range part is not a fit for a design that needs a wider range.

Life cycle

Check whether the alternative is in active production or nearing the end of its life. An alternative that is itself close to obsolete only moves the problem to a later date.

An Alternative Is a Suggestion, Not a Substitution

Every alternative we offer is a suggestion for your engineering team to confirm. No part is replaced without customer approval, and the final decision stays with your team. If the checks above leave any doubt, keep the first choice and ask us to keep looking.