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STMicroelectronics STM32F103R8T6TR — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM32F103R8T6TR ARM Cortex-M3 MCU, 72 MHz, 64 KB Flash

MPNSTM32F103R8T6TR
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STMicroelectronics STM32F103 series, ARM Cortex-M3 32-bit MCU, 72 MHz, 64 KB Flash, 20 KB RAM, 64-LQFP (10x10 mm), -40 to 85°C, 2 V to 3.6 V supply, 51 I/O, CAN, I²C, SPI, USB, UART.

$7.1700Ref. price · indicative, final on quote
STMicroelectronics STM32F103R8T6TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F103R8T6TR 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
PackageTape & Reel (TR); Cut Tape (CT)
RAM size20K 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)51
Core processorARM® Cortex®-M3
Case64-LQFP
Data convertersA/D 16x12b
Program memory size64KB (64K x 8)

Product details

What this ARM Cortex-M3 brings to the board

The STMicroelectronics STM32F103R8T6TR is a 32-bit ARM Cortex-M3 MCU running at 72 MHz, with 64 KB of Flash program memory and 20 KB of RAM.

The 72 MHz clock rate on this Cortex-M3 paired with the 12-bit ADC (16 channels) and motor-control PWM timers gives deterministic timing for a motor-drive or PLC I/O slice.

Memory sizing — 64 KB Flash, 20 KB RAM

The Flash is enough for a bootloader, a Modbus RTU slave, and a few hundred lines of application code.

Package and assembly

The 64-LQFP (10x10 mm) is a standard surface-mount footprint. It reflows on a standard lead-free profile and is compatible with automated optical inspection.

Frequently asked questions

What is the closest pin-compatible alternative to STM32F103R8T6TR?

The STM32F103RBT6 (128 KB Flash) and STM32F103VBT6 (128 KB Flash, 100-pin) are pin-compatible within the same 64-LQFP footprint, offering double the Flash and RAM for firmware growth without a board respin.

What is STM32F103R8T6TR's listed speed?

The core runs at 72 MHz, which is the maximum clock for the STM32F103 series.