When a STM32WBA55CEU6 supplier quote names a different ordering code, keep the requested and offered parts separate. Identify whether the change concerns packing, temperature range or the device itself. Then send the relevant difference to the person responsible for assembly or product approval. A similar name or a lower price does not decide whether your purchase requirement can change.
Start With the Complete Ordering Code
Use the complete code from the released purchasing requirement. Keep STM32WBA55CEU6 in that field when reviewing a different offer. Put the supplier's proposed code in a separate field, including any trailing letters.
ST's ordering scheme separates pin count, Flash memory size, package, temperature range and packing. In this part, C identifies 48 pins, E identifies 512 Kbytes of Flash memory, and U identifies the UFQFPN package. These positions describe different attributes. Do not shorten the requirement to STM32WBA55 when preparing an order.
A family heading can describe several configurations. Read the exact ordering-code record rather than assigning every family feature to the quoted device. Keep the manufacturer's document version with the comparison.
Classify the Difference Before Comparing Prices
The following comparison uses ST's listed ordering information and exact product records, checked on November 11, 2026. It identifies review questions, not approved substitutes.
Ordering Code | Manufacturer-Listed Difference | Purchasing Question |
|---|---|---|
STM32WBA55CEU6 | UFQFPN48; tray packing; industrial range -40 to 85°C | Does the offer match the complete released requirement and actual pack condition? |
STM32WBA55CEU6TR | Same listed package and temperature range; tape-and-reel packing | Can the assembly process accept the offered carrier and supplied quantity? |
STM32WBA55CEU7 | UFQFPN48; tray packing; industrial range -40 to 105°C | Who must review and approve the changed temperature code? |
ST's STM32WBA5xxx datasheet, DS14127 Rev. 10, section 7, defines the code positions and TR packing suffix. Its temperature-code description also states junction limits separately. Do not treat an operating-temperature range as an unrestricted junction-temperature allowance.
The comparison does not verify offered stock, establish authenticity or approve a board change. It also does not establish that every possible combination in the coding scheme is an available orderable part.
Send a Packing Change to the Assembly Reviewer
The TR suffix is a packing distinction in this ordering scheme. That is a different question from changing the package mounted on the board. A tape-and-reel offer still needs an assembly review when the released purchasing requirement specifies trays.
Ask the assembly team which carrier it can receive and load. Confirm the actual supplied format with the seller. A manufacturer's tape-and-reel ordering code does not establish that an independently held offer is an unopened full reel.
Record the offered piece count, remaining pack quantity and any disclosed repacking. Ask whether the price requires a complete reel or allows a smaller release. Keep the package condition separate from the ordering code. The full-reel, cut-tape and partial-reel guide covers that broader packaging decision.
Do Not Treat a Temperature Change as Automatic Approval
ST lists different temperature ranges for the 6 and 7 ordering codes. A wider listed range does not, by itself, authorize a change to your company's exact approved part number.
Send the original requirement and proposed full code to the responsible product reviewer. State the application temperature requirement and ask what review is needed. Keep any relevant customer or assembly restrictions visible. Record the resulting decision rather than replacing the original code in the supplier comparison.
If another part of the code changes, reopen the technical comparison. Do not infer board or firmware compatibility from the shared family name. Ask the engineering owner to compare the actual requirements with the applicable device documentation. This article makes no tested-interchangeability claim.
Keep the Decision Attached to the Actual Offer
A useful review record has five entries: required code, offered code, identified difference, reviewer decision and affected quotation reference. Add the relevant product or BOM revision so that a later buyer can understand the scope.
Use ST's STM32WBA55CE product records to check the listed variants. Keep manufacturer specifications separate from the seller's quantity, packaging evidence and commercial response.
The approved-alternatives guide explains how to retain approval scope. Approval for a named variant does not automatically extend to every other code on a manufacturer's family page.
Work Through a Hypothetical Offer
A fictional buyer needs 600 pieces of STM32WBA55CEU6 for a released build. A seller offers 600 pieces of STM32WBA55CEU6TR. A second offer names STM32WBA55CEU7 in trays. These are illustrative offers, not available stock or real quotations.
The buyer records two different questions. The TR proposal goes to assembly for carrier acceptance and confirmation of the actual pack supplied. The U7 proposal goes to the product reviewer for the changed temperature code. Neither proposal silently replaces the required U6 code.
If one proposal is accepted, the buyer records its full ordering code and the approval scope. The seller then confirms the matching offered material and conditions. An unresolved proposal remains separate from the quantity selected for purchase.
Make the Ordering Decision Clear
Compare the full codes before comparing the offers as equivalent choices. Resolve packing changes with the assembly owner and device-requirement changes with the responsible product reviewer. Carry the accepted ordering code into the quotation, purchase instruction and receiving record. Leave every unresolved difference visible.
Frequently Asked Questions
Does TR Mean a Different Package on the Board?
ST defines TR as tape-and-reel packing in this ordering scheme. The listed STM32WBA55CEU6 and STM32WBA55CEU6TR variants share the UFQFPN48 package. Your assembly team still needs to accept the supplied carrier and actual pack condition. Preserve the full code in purchasing records.
Can I Order STM32WBA55CEU7 Instead of STM32WBA55CEU6?
Do not make that change solely because the listed temperature range is wider. Record both full codes and ask the responsible reviewer to confirm the change against the released requirement. Retain the decision and its applicable product or BOM revision before using the proposed code.
Does the Manufacturer's Packing Type Prove an Offer Is Factory Sealed?
No. It describes the manufacturer's packing option for that ordering code. It does not establish how a particular surplus pack was stored, opened or repacked. Ask for the offered piece count, current packaging description and relevant evidence. Keep unknown handling information explicit.
Can a Shared Family Name Confirm Firmware Compatibility?
No. A family name is not a review of your compiled firmware, board or product requirements. When the proposed device differs, give the full codes and applicable documentation to the engineering owner. Keep its assessment separate from the supplier's willingness to quote the part.
What If the Quote Shows Only STM32WBA55CE?
Ask for the complete offered ordering code. The shorter reference omits fields needed to distinguish the package, temperature code and packing option. Keep the offer unresolved until the supplier identifies what it intends to deliver. Do not fill in missing characters from your own requirement.