Compare Full Orderable Part Numbers Before Accepting a Suffix Change

Two part numbers that differ only at the end may identify equivalent devices in different packing, or they may describe a meaningful package or performance difference. Do not remove suffixes to make a supplier offer match the BOM. Compare the complete orderable numbers and document what each difference means.

TI’s TPS62A01 package-option addendum illustrates separate fields for orderable identity, package, carrier, material type, and other attributes. It is an example of the detail to inspect, not a universal suffix decoder for other component families or manufacturers.

Build a side-by-side comparison

Start with the approved manufacturer part number and the exact offered number. Retrieve the current ordering information for both. Preserve punctuation, temperature or qualification designations, and package codes until their meaning is resolved. Have a second reviewer check the comparison when similar characters could conceal a different option.

Compare device function and specified limits, pin assignment, package dimensions, terminal finish, packing format, and any relevant manufacturing or qualification option. Identify which differences affect the electrical design, assembly setup, purchasing record, or receiving inspection.

These assignments are starting points, not automatic approvals. A packing-only change can still matter to feeder setup, leader requirements, or a low-volume assembly arrangement. Verify the supplied carrier information rather than assuming that every tape option loads identically.

Record the approved relationship

1. List the attributes compared and their primary references.
2. Resolve any ambiguous ordering code with the manufacturer.
3. Identify affected assembly and inspection documents.
4. Approve the alternate for a defined internal part or build scope.
5. Retain the full purchased number in traceability records.

Do not silently replace the BOM number with a shorter family label after approval. Keeping both exact identities allows later PCNs, discontinuance notices, and receiving discrepancies to be matched correctly.

If the documentation does not establish equivalence, hold the substitution for further review. A distributor cross-reference or a similar photograph is insufficient evidence of identical electrical and mechanical behavior. Likewise, a different top marking may be expected for an approved option, but it must be supported by manufacturer information.

Close the decision with a concise explanation of what changed and why the offered part is acceptable for the stated use. The incoming marking guide explains how receiving inspection can check that the delivered material matches this approved decision.