1. Identify the output-driver descriptor
Identify the oscillator product and complete ordering reference before grouping stock by frequency. Preserve available original labels and configuration or purchase records where they explain the variant. An internal board-clock name may locate relevant history, but it should not replace the manufacturer code. Keep a board assembly's identifier separate when the proposed sale item is a populated board rather than a loose oscillator.
Give the documented output-driver type its own field alongside the frequency description. SiTime's differential-oscillator application-note introduction names LVPECL, LVDS and HCSL output drivers in its supported product context. These are examples of descriptions a reviewer needs to retain. The introduction does not determine which option belongs to an unidentified oscillator taken from a seller's storage container.
Match the actual code or option record to its applicable output wording. If only nominal frequency is known, keep output identity unresolved rather than assigning the type used elsewhere on the same programme. Where the full code and an old stock description disagree, preserve both and identify the affected quantities. A shared frequency total should not conceal missing output-option evidence.
2. Keep driver and receiver names distinct
Separate the oscillator's output driver from the receiver input named in an application record. SiTime's introduction distinguishes its output-driver types and discusses interfaces involving particular receiver inputs. This distinction matters when a board document names the destination of a clock signal: that destination alone should not be copied into the oscillator's output-type field.
Label the source of each term. A manufacturer's variant description can support an output-driver field, while a released board record can describe the receiving component or input. Keep the relationship as documented rather than converting the two names into a general compatibility statement. A reference to an interface discussion is not itself evidence that the offered hardware uses that arrangement.
When the seller has only a board nickname or a receiving-device description, ask for the original oscillator identification. Keep the existing reference in a context field so it remains useful without answering a different question. This makes the enquiry more precise: the recipient can request the missing driver evidence rather than assuming the receiver name fully defines the timing product.
3. Separate catalogue interface from circuit status
An output-family label does not document the actual termination network, interconnect or present signal result. The SiTime introduction leads into an application discussion, but this classification guide does not read its diagrams into an offered board or prescribe a termination. Keep any circuit reference with its actual revision and leave an unreviewed connection question with the responsible technical owner.
Preserve an existing clock or board assessment as a separate record with the identified hardware, conditions, date and stated scope. Do not expand a frequency measurement into confirmation of every interface property. Likewise, a source document naming an output type does not establish current jitter, waveform quality or receiver operation for surplus units. Report only the results that an actual available record provides.
Describe unused packing, opened stock or known prior installation independently from the output field. If components were removed or repacked, state the relevant history and observed package issues where known. A readable manufacturer label supports identity; it does not show that each device has been evaluated after handling. Keep missing configuration or condition records explicit when they affect the groups submitted.
4. Offer output-identified timing groups
Arrange identified quantities by complete oscillator code and supported output type, retaining frequency information and pack references alongside them. Keep driver-unknown items separate from confirmed descriptions. Where records identify a family with several options but do not resolve the offered variant, preserve that limitation rather than advertising the family as one uniform output group. If frequency-only labels cover several packs, keep their pack references so later output-option evidence can be attached to the correct quantities rather than the family total.
Use the general stock-list guide for location, released quantity, ownership and condition fields. The related timing guide distinguishes crystal units, oscillator products and larger assemblies; this decision begins with an oscillator and resolves the driver's terminology independently from a receiver. Retaining that narrower question avoids making a broad timing classification appear to answer a circuit-interface requirement.
For an ICULTRA timing enquiry, provide the full identifiers, supported driver descriptions and any separate board-context records. Explain missing option evidence and ask what further identification is needed. This is a description of the released stock, not an interface design approval. Accepted quantities, any evaluation requirements and purchase terms remain subject to the actual groups and separate written confirmation.
Sources and further reading
Manufacturer documents support the technical guidance above. They do not confirm our stock, authorisation or the condition of any offered lot.