STM32F103C8T6 Alternatives and Equivalents
STM32F103 (ARM Cortex-M3) · STMicroelectronics · verified against manufacturer datasheet parameters
STM32F103C8T6 — a STM32F103 (ARM Cortex-M3) part from STMicroelectronics — is one of the most-searched part numbers in its category. This page compares its verified pin-compatible variants and closest family alternates, using manufacturer datasheet parameters, and shows what is actually available from stock.
The table below distinguishes true drop-in replacements (same package and pinout) from family alternates that need design review. Specs marked "—" vary by suffix or were not published in the source data — confirm on the datasheet before committing.
This cross-reference is part of our guide to counterfeit electronic components — These parts are among the most counterfeited lines on the open market — inspection methods are in our pillar guide.
View STM32F103C8T6 stock & pricing
Is the STM32F103C8T6 discontinued?
The STM32F103 series remains one of the highest-volume MCU families in production, but individual ordering codes cycle through allocation repeatedly. STM32F103C8T6 itself is actively produced; availability and lead time fluctuate with ST's capacity allocation, which is why holding a verified alternate list matters even for "active" parts.
Pin-to-pin compatible alternatives
"Drop-in" means same package and pinout; other rows are family alternates that need design review.
| Part Number | Compatibility | Package | Core Processor | Core Size | Speed | Program Memory Size | RAM Size | Number of I/O | Connectivity | Data Converters | Voltage - Supply (Vcc/Vdd) | Operating Temperature | Package / Case |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STM32F103C8T6 (target) | — | LQFP | ARM® Cortex®-M3 | 32-Bit | 72MHz | 64KB (64K x 8) | 20K x 8 | 37 | CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB | A/D 10x12b | 2V ~ 3.6V | -40°C ~ 85°C (TA) | 48-LQFP |
| STM32F103CBU6 | Drop-in (same package & pinout) | 48-VFQFN Exposed Pad | ARM® Cortex®-M3 | 32-Bit | 72MHz | 128KB (128K x 8) | 20K x 8 | 37 | CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB | A/D 10x12b | 2V ~ 3.6V | -40°C ~ 85°C (TA) | 48-VFQFN Exposed Pad |
| STM32F103C6T6 | Drop-in (same package & pinout) | 48-LQFP | ARM® Cortex®-M3 | 32-Bit | 72MHz | 32KB (32K x 8) | 10K x 8 | 37 | CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB | A/D 10x12b | 2V ~ 3.6V | -40°C ~ 85°C (TA) | 48-LQFP |
| STM32F103CBT6 | Drop-in (same package & pinout) | 48-LQFP | ARM® Cortex®-M3 | 32-Bit | 72MHz | 128KB (128K x 8) | 20K x 8 | 37 | CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB | A/D 10x12b | 2V ~ 3.6V | -40°C ~ 85°C (TA) | 48-LQFP |
| STM32F103R8H6 | Family alternate — review design | 64-TFBGA | ARM® Cortex®-M3 | 32-Bit | 72MHz | 64KB (64K x 8) | 20K x 8 | 51 | CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB | A/D 16x12b | 2V ~ 3.6V | -40°C ~ 85°C (TA) | 64-TFBGA |
| STM32F103R6T6 | Family alternate — review design | 64-LQFP | ARM® Cortex®-M3 | 32-Bit | 72MHz | 32KB (32K x 8) | 10K x 8 | 51 | CANbus, I2C, IrDA, LINbus, SPI, UART/USART, USB | A/D 16x12b | 2V ~ 3.6V | -40°C ~ 85°C (TA) | 64-LQFP |
STM32F103C8T6 vs STM32F103CBU6: what actually differs
The two most-compared codes differ on: Program Memory Size: STM32F103C8T6 = 64KB (64K x 8), STM32F103CBU6 = 128KB (128K x 8); Package / Case: STM32F103C8T6 = 48-LQFP, STM32F103CBU6 = 48-VFQFN Exposed Pad.
Everything else in the compared parameter set matches. If your design has margin on the differing parameters, STM32F103CBU6 is a practical substitute; if not, hold out for the exact code — we stock both.
Migration checklist: re-validate before you swap
- Flash and RAM size of the alternate must meet your firmware image — C6 (32 KB) / C8 (64 KB) / CB (128 KB) variants differ only in memory
- Confirm the package and pinout match (LQFP48 vs LQFP64 are not interchangeable)
- Re-validate the clock tree: HSE crystal loading and startup margins differ per lot and grade
- Check bootloader and USB/CAN peripheral presence on the exact alternate code
- Re-run your full firmware test suite — register-level compatibility within the family is high but not absolute
Where to source STM32F103C8T6 and its alternates
We stock STM32F103C8T6 and its family variants in Hong Kong with date codes stated on every quote. Each lot passes marking verification; X-ray and electrical testing through accredited partner labs are available on request, with the report delivered before final payment.
Pricing follows the live spot market, so quotes carry a stated validity window — typically 24 to 48 hours on volatile lines. Send your quantity and required date code and the desk replies within 2 working hours.
STM32F103C8T6 can also ship consolidated with the rest of your BOM — one shipment, one invoice, one inspection standard. For recurring demand we reserve stock and schedule multi-lot releases, which smooths both price exposure and availability risk across your build calendar.
Guides: obsolete component sourcing · counterfeit detection methods
FAQ
Is STM32F103C8T6 discontinued?
No — the STM32F103 family is in active production. Individual codes do enter allocation, which is when the alternates on this page become relevant.
Are STM32F103 variants pin-to-pin compatible?
Within the same package (e.g. all LQFP48 "C" variants), yes — C6/C8/CB differ only in flash/RAM size. Cross-package moves (C to R/V/Z) are NOT pin-compatible.
Can I drop in a GD32 or CH32 clone?
Pin-compatible clones exist and are widely used, but peripheral timing, USB behavior and flash programming differ. Validate thoroughly before production use.
Do I need to change firmware for a flash-size upgrade?
Usually no — a C8T6 application runs unmodified on a CBT6 (more flash/RAM). Downgrades require checking your image size first.
How are these parts sourced?
From RISEIC Hong Kong stock with date codes stated on the quote; every lot passes marking verification, and X-ray is available on request.
What is the lead time?
Stocked variants ship in 1–3 working days. Allocated variants are quoted with an honest market lead time and a stated validity window.
Can I see photos or test reports before ordering?
Yes — label and top-marking photos of the actual lot are standard, and X-ray or lab reports can be arranged before payment on first orders. Tell the desk what your incoming inspection requires.
Do you support scheduled production deliveries?
Yes. For recurring demand we reserve stock of STM32F103C8T6 or its alternates and release shipments against your build schedule — one agreement instead of repeated spot buys.
Start an RFQ — our Hong Kong desk replies within 2 working hours.