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STMicroelectronics STM32F103C6T6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F103C6T6 ARM Cortex-M3 MCU, 72 MHz, 32 KB Flash

MPNSTM32F103C6T6
Obsolete

STMicroelectronics STM32F103C6T6, ARM Cortex-M3 32-Bit MCU, 72 MHz, 32 KB Flash, 10 KB SRAM, 48-LQFP, -40°C to 85°C, 2V to 3.6V supply.

$2.9902Ref. price · indicative, final on quote
STMicroelectronics STM32F103C6T6 datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F103C6T6 specifications
ParameterValue
SeriesSTM32F1
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed72MHz
PackageTray
RAM size10K x 8
Core size32-Bit Single-Core
PeripheralsDMA, Motor Control PWM, PDR, POR, PVD, PWM, Temp Sensor, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, SPI, UART/USART, USB
Number of i (O)37
Core processorARM® Cortex®-M3
Case48-LQFP
Data convertersA/D 10x12b
Program memory size32KB (32K x 8)

Product details

It is the entry-level density option in the STM32F1 series, housed in a hand-solderable 48-LQFP package.

Memory sizing — 32 KB Flash / 10 KB SRAM

The 32 KB Flash (32K x 8) and 10 KB SRAM (10K x 8) define the firmware budget. This is the smallest Flash option in the STM32F103 family; designs needing more code space typically step up to the 64 KB or 128 KB variants. The 10 KB SRAM supports moderate data buffers and stack depth for control loops and communication stacks.

For new designs, ST recommends moving to a current STM32F1 or STM32G0 series device.

48-LQFP — hand-solderable footprint

No BGA underfill or X-ray inspection needed — a practical choice for prototype runs and rework in a lab or repair bench setting.

Frequently asked questions

What is the replacement for STM32F103C6T6?

For new designs, ST recommends migrating to a current STM32F1 or STM32G0 series device with compatible pinout and peripheral set. The STM32F103C8T6 (64 KB Flash) is a pin-compatible higher-density option within the same family, but it too is now obsolete.

What is the difference between STM32F103C6T6 and STM32F103C8T6?

The STM32F103C8T6 doubles the Flash to 64 KB (64K x 8) and increases SRAM to 20 KB (20K x 8). Both share the same 48-LQFP package, 72 MHz Cortex-M3 core, and peripheral set. The C8T6 is a drop-in replacement if the firmware fits the larger memory — but it is also obsolete.