VERIFIED CROSS-REFERENCE
STM32F103C8T6 alternatives & equivalent parts
ARM Cortex-M3 MCU，72MHz，64KB Flash / 20KB SRAM，USB FS + CAN。 — common packages: LQFP-48. Each candidate below cites its manufacturer datasheet; check the relationship badge before substituting.
3 verified alternatives for STM32F103C8T6
| Alternative | Manufacturer | Relationship | Key differences | Source |
|---|---|---|---|---|
| STM32F103CBT6 | STMicroelectronics | Pin-to-pinDrop-in: same footprint and pinout. | 同 LQFP-48、72MHz、20KB SRAM、USB/CAN、时钟树；Flash 64KB→128KB，固件可按 128KB 重链接，原 64KB 固件一般可直接运行；原厂同系列，采购时注意丝印 C8/CB 区别。 | ST 官方数据手册的第三方镜像（imimg） |
| GD32F103C8T6 | GigaDevice | FunctionalSame function: board or design change needed. | 第三方兼容 MCU（非 ST 原厂）：同 LQFP-48、64KB Flash、20KB SRAM；主频 108MHz（高于原 72MHz，需按官方手册设置 Flash 等待状态）；电源 2.6–3.6V；启动延迟、复位电路、USB/CAN/ADC 特性与 ST 有别，须逐项验证并做整板回归测试；调试器需支持 GD32。 | GigaDevice 官方页面 |
| APM32F103C8T6 | Geehy（极海半导体） | FunctionalSame function: board or design change needed. | 第三方兼容 MCU（非 ST 原厂）：LQFP-48、64KB Flash、20KB SRAM、工业温度；须按官方数据手册核对时钟树、Flash 等待状态、USB/CAN、ADC/DAC 与 SWD 调试接口差异；注意供货渠道与长期供货承诺。 | 极海官方数据手册 |
Pre-replacement checklist
- 确认 PCB 封装为 LQFP-48 且丝印与引脚表和候选一致
- 第三方兼容 MCU 必须做整板回归测试（时钟、USB、CAN、ADC、Flash 等待状态）
- 固件链接脚本按目标 Flash 容量（64KB/128KB）重设
- 采购前与供应商确认批次与原厂渠道，防范翻新件
Need the exact lot, date code or a second source quoted?
Send the original MPN and the approved alternative. Sourceics reconfirms source, stock, date code and commercial terms before any order — no substitution without your engineering approval.
Request a quote for STM32F103C8T6Source part reference: ST 官方页面. Equivalence notes are reference guidance, not a guarantee of fit — always verify against your schematic and layout.