STM32F103C8T6alternatives & cross reference

4 Chinese-brand replacement candidates for STM32F103C8T6 (STMicroelectronics) in MCU — each labeled with its verification level and parameter differences. Shenzhen sourcing, quote in 24 hours.

APM32F103C8T6

Geehy · MCU

VerifiedFAE reviewed

Pin-to-pinPin-compatibleUpdated 2026-10-30Vendor document

Parameter	STM32F103C8T6	APM32F103C8T6	Engineering note
Package and exact order code	STM32F103C8T6: LQFP48, 7 x 7 mm, industrial -40 C to +85 C	APM32F103C8T6: LQFP48, tray SPQ 2500, industrial -40 C to +85 C	Both exact order codes use a 48-pin LQFP and expose the same main-function sequence on pins 1 through 48. PCB land-pattern, assembly, reel/tray handling and thermal design still require release checks.
Maximum core frequency	72 MHz	96 MHz	The target has more clock headroom. Recalculate clocks, bus dividers, peripheral timing and Flash access timing before enabling any frequency above the source design limit.
Operating supply and temperature grade	2.0 V to 3.6 V; suffix 6 rated -40 C to +85 C	2.0 V to 3.6 V; APM32F103C8T6 order table rated -40 C to +85 C	The precise C8T6 order-table limits match the source. Do not substitute the wider series-page temperature claims into this exact order code.
Peripheral identifiers and software ecosystem	STM32 peripheral names, registers and firmware ecosystem	Geehy peripheral naming, registers and firmware ecosystem	The LQFP48 main functions correspond, but register maps, clock setup, interrupt behavior, drivers and tool support differ. Firmware porting is required and must be validated.
Electrical and analog implementation	STM32F103 electrical limits and ADC timing	Geehy APM32F103 electrical limits and ADC timing	Matching supply range and pin functions do not guarantee identical ADC accuracy, oscillator behavior, ESD, thermal or transient performance.

FAE documentary review accepted for the exact STM32F103C8T6 and APM32F103C8T6 order codes. Both are 64 KB Flash, 20 KB SRAM, 37-GPIO, 2.0 V to 3.6 V LQFP48 Cortex-M3 MCUs, and the complete LQFP48 main-function pin sequence matches. The target order table confirms the C8T6 temperature grade as -40 C to +85 C and the maximum core frequency as 96 MHz. Pin correspondence does not establish register, clock, ADC, driver or software compatibility. Document review only; not bench, temperature-cycle, EMC, reliability or production qualified.

View on ONEICShenzhen sourcing · price & lead time by RFQ

CH32F103C8T6

WCH (Qinheng) · MCU

VerifiedFAE reviewed

Pin-to-pinPin-compatibleUpdated 2026-10-30Vendor document

Parameter	STM32F103C8T6	CH32F103C8T6	Engineering note
Package and exact order code	STM32F103C8T6: LQFP48, 7 x 7 mm, industrial -40 C to +85 C	CH32F103C8T6: LQFP48, 7 x 7 mm, 0.5 mm pitch, industrial -40 C to +85 C	Both exact order codes use a standard 48-pin LQFP and expose the same main-function sequence on pins 1 through 48. PCB land-pattern, assembly and thermal design still require release checks.
Operating supply voltage	2.0 V to 3.6 V	2.7 V to 5.5 V	The target raises the minimum supply to 2.7 V and supports a higher maximum. Review all 3.3 V and 5 V rails, I/O levels and external interfaces.
ADC analog supply	ADC available with VDDA from 2.4 V to 3.6 V	ADC VDDA from 3.0 V to 5.5 V	Applications using the ADC require at least 3.0 V on VDDA and must revalidate input range, reference and accuracy.
Peripheral set	Two ADCs, one USB 2.0 FS device controller, no DAC or TouchKey	ADC, dual-channel DAC, TouchKey and two USB 2.0 FS controllers	The target provides additional resources, but their registers, pin multiplexing and driver behavior are not interchangeable with STM32 peripherals.
USB voltage selection	USB operation follows the STM32 supply design	USB requires 3.0 V to 3.6 V without USB5VSEL, or 4.0 V to 5.5 V with USB5VSEL	A 5 V USB design must configure and validate USB5VSEL; do not apply that setting to a 3.3 V rail.
Registers, clocking and software	STM32 registers, clock tree and firmware ecosystem	WCH register map, clocking and firmware ecosystem	Pin names and main functions correspond, but firmware, USB stack, toolchain support and peripheral timing require porting and validation.

FAE documentary review accepted for the exact STM32F103C8T6 and CH32F103C8T6 order codes. Both are 64 KB Flash, 20 KB SRAM, 37-GPIO, 72 MHz LQFP48 Cortex-M3 MCUs, and the complete LQFP48 main-function pin sequence matches. The target supply range is 2.7 V to 5.5 V, its ADC requires VDDA of at least 3.0 V, and USB 5 V operation requires USB5VSEL. It also adds DAC, TouchKey and a second USB controller. Pin correspondence does not establish register or software compatibility. Document review only; not bench, temperature-cycle, EMC, reliability or production qualified.

View on ONEICShenzhen sourcing · price & lead time by RFQ

GD32F103C8T6

GigaDevice · MCU

VerifiedFAE reviewed

Pin-to-pinPin-compatibleUpdated 2026-10-30Vendor document

Parameter	STM32F103C8T6	GD32F103C8T6	Engineering note
Package and exact order code	STM32F103C8T6: LQFP48, 7 x 7 mm, industrial -40 C to +85 C	GD32F103C8T6: LQFP48, green industrial -40 C to +85 C	Both exact order codes use a 48-pin LQFP and expose the same main-function sequence on pins 1 through 48. PCB land-pattern, assembly and thermal design still require independent release checks.
Operating supply voltage	2.0 V to 3.6 V	2.6 V to 3.6 V	The target minimum supply is 0.6 V higher. Applications that operate below 2.6 V are not eligible without a separate validated target operating point.
Maximum core frequency	72 MHz	108 MHz	The target has more clock headroom, but system clocks, bus dividers, peripheral timing and analog conversion timing must be revalidated.
Flash access and clock configuration	Flash wait states and PLL settings documented for STM32F103	Zero-wait-state Flash operation and GigaDevice clock configuration	Reconfigure Flash latency and PLL settings from the GD32 datasheet; copying the STM32 register initialization is not sufficient.
Peripheral identifiers and software ecosystem	TIM2/TIM3/TIM4, SPI1/SPI2, I2C1/I2C2 and USART1/USART2/USART3	TIMERx, SPI0/SPI1, I2C0/I2C1 and USART0/USART1/USART2 identifiers	Pin functions correspond, but peripheral numbering, registers, drivers, startup code and tool support differ. Source-level firmware compatibility and USB behavior must be reviewed.

FAE documentary review accepted for the exact STM32F103C8T6 and GD32F103C8T6 order codes. Both are 64 KB Flash, 20 KB SRAM, 37-GPIO LQFP48 Cortex-M3 MCUs, and the complete LQFP48 main-function pin sequence matches. This is a pin-to-pin package/function assessment, not proof of identical registers, clocks, USB behavior or software. The target minimum supply rises from 2.0 V to 2.6 V and the maximum core clock rises from 72 MHz to 108 MHz. Document review only; not bench, temperature-cycle, EMC, reliability or production qualified.

View on ONEICShenzhen sourcing · price & lead time by RFQ

HK32F103C8T6

HK (Hangshun) · MCU

VerifiedFAE reviewed

Pin-to-pinPin-compatibleUpdated 2026-10-30Vendor document

Parameter	STM32F103C8T6	HK32F103C8T6	Engineering note
Package and exact order code	STM32F103C8T6: LQFP48, 7 x 7 mm, industrial -40 C to +85 C	HK32F103C8T6: LQFP48, 7 x 7 mm, 0.5 mm pitch, -40 C to +105 C, reel or tray	Both exact order codes use a 48-pin LQFP and expose the same main-function sequence on pins 1 through 48. PCB land-pattern, assembly, package handling and thermal design still require release checks.
Operating supply voltage	2.0 V to 3.6 V	2.0 V to 5.5 V	The target supports a higher maximum supply. Verify all I/O levels, analog limits and external-interface protection for the selected rail.
Maximum core frequency	72 MHz	96 MHz	The target has more clock headroom. Recalculate clocks, bus dividers, peripheral timing and Flash access timing before operating above the source design limit.
Temperature range	-40 C to +85 C for suffix 6	-40 C to +105 C	The target extends the documented ambient range, but another temperature grade does not validate the complete board or system.
Flash endurance	10,000 program/erase cycles minimum over the rated temperature range	1,000 program/erase cycles documented	The target document specifies only 1,000 cycles. Applications that update parameters or logs frequently need a wear-leveling and lifetime review.
Peripheral set	STM32F103C8T6 peripheral set, with no DIVSQRT accelerator	Adds DIVSQRT accelerator; no DAC	Extra acceleration is not a drop-in STM32 peripheral, and firmware must use the target's documented register interface.
Registers, clocking and software	STM32 registers, clock tree and firmware ecosystem	Hangshun register map, clocking and firmware ecosystem	Pin names and main functions correspond, but register maps, clock setup, drivers, debug integration and tool support differ. Firmware porting is mandatory.

FAE documentary review accepted for the exact STM32F103C8T6 and HK32F103C8T6 order codes. Both are 64 KB Flash, 20 KB SRAM, 37-GPIO LQFP48 Cortex-M3 MCUs, and the complete LQFP48 main-function pin sequence in the manufacturer-authored datasheet matches. The target extends the documented supply to 5.5 V, maximum clock to 96 MHz and temperature to +105 C, but documents only 1,000 Flash program/erase cycles. It adds DIVSQRT and has no DAC. The reviewed PDF is manufacturer-authored but is hosted by Oneyac, not on the manufacturer's current domain; the official Hangshun product page independently confirms HK32F103C8T6, 64 KB, 2.0 V to 5.5 V, -40 C to +105 C and LQFP48. Pin correspondence does not establish register or software compatibility. Document review only; not bench, temperature-cycle, EMC, reliability or production qualified.

View on ONEICShenzhen sourcing · price & lead time by RFQ

Related cross-references

STM32F030C8T6 STM32F103CBT6 STM32F103RCT6 STM32F103RET6 STM32F103V8T6 STM32F103VBT6 STM32F103VCT6 STM32F103VET6

Disclaimer

Cross-reference suggestions for STM32F103C8T6 are provided for engineering convenience and are based on published specifications, vendor documents, or parametric analysis as labeled on each entry. They do not constitute an endorsement by, or an affiliation with, STMicroelectronics, and they are not a guarantee of suitability for any specific application. Always validate alternatives against both manufacturers' current datasheets and your own qualification process before production use.