Ordering STM32 for production comes down to three things: the exact part number, the lot, and the alternatives. The part number must include the full suffix — STM32F103C8T6 and STM32F103CBT6 differ in flash size, and the tail encodes package and temperature grade. The lot matters because mixing date codes of the same part number introduces erratum and firmware-stability variance; for series builds, keep to one lot and record its provenance. Alternatives matter when originals are unavailable: Chinese clones such as GD32 and APM32 keep a line running, and they come with a written comparison of what matches and what differs — the decision to swap stays with the design owner. We take the list line by line, source from vetted channels, consolidate into one shipment and deliver DDP, including small quantities for pilot builds and repair.
Table of Contents (8 points)
What to put in the request
- Full part number with suffix: the tail encodes package, flash size and temperature grade.
- Package and packing: tape/tray for a production line, loose parts for pilot builds.
- Quantity with a tolerance: scarce positions may turn up fewer than asked — know the minimum that still works.
- A note on where a clone is acceptable and where only the original will do.
- For development boards: revision and documentation set are the two things worth specifying.
Lots, date codes and why they matter
Mixing lots of one part number is a hidden source of production problems: different date codes can carry different errata revisions, and test reproducibility suffers before anything visibly breaks. The rule for series builds is one batch, one lot; for larger programs the lot is recorded in the documents so the same build can be repeated months later. Pilot runs and repair genuinely do not care — small quantities per line, from a single unit upward, are our standard order shape.
Original or Chinese clone
When an original STM32 is unavailable, the working strategy is not to idle: GD32, APM32 and similar cores cover most applications where the specific peripheral quirks and errata of a given series are not critical. Each proposed clone arrives with a comparison — matching parameters, differences, and known caveats such as programmer requirements and block-level behaviour. The engineering decision remains with the design owner; our job is to provide the data.
Shipping and payment
Everything consolidates into one shipment: parts from different makers and sellers arrive at our Shenzhen warehouse, are checked, packed together and shipped door-to-door (standard DAP express via DHL/FedEx, or dedicated DDP for sensitive regions) to your address. No Chinese account is needed on your side — payment arrives to us by bank wire transfer (T/T in USD) against our proforma invoice; we settle with Chinese suppliers ourselves. One shipment, one document pack — not fifteen parcels from fifteen sellers.
Parts named in this guide
CatalogEach of these is a part or part family this guide covers, linked to the catalog row we hold for it — specifications, package, lifecycle stage and the datasheet where we have localized one. Where the guide names a family, the row shown is the orderable part number we stock. A part the guide covers but that is missing from this list is one we do not currently carry; send the number and it goes out for sourcing with the rest.
| Part number | Manufacturer | Description |
|---|---|---|
| STM32F103C8T6Datasheet | STMicroelectronics | STMicroelectronics STM32F1 series, ARM Cortex-M3 32-bit MCU, 72MHz, 64KB Flash, 20KB SRAM, 48-LQFP, -40 to 85°C, ROHS3. |
| STM32F103CBT6Datasheet | STMicroelectronics | STMicroelectronics STM32F103CBT6, STM32F1 series, 32-bit ARM Cortex-M3 MCU, 72MHz, 128KB Flash, 20K x 8 RAM, 37 I/O, CAN/USB/SPI/I2C, 2V-3.6V, -40°C to 85°C, 48-LQFP. |
Put this to work on your component list
Send the part numbers or the whole BOM sheet. Each line comes back with current spot availability, original manufacturer condition, and verified cross-references — packed and shipped together in one single parcel.
How this guide is written
Written by the ICBOMS sourcing desk in Shenzhen and reviewed against the manufacturer documents and industry standards the guide cites. Statements are limited to what this desk does and how a part is judged — no indicative prices, lead times or stock counts, because those are quoted per line against a live check. Each guide carries the date it was last reviewed at the top of the page.