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STMicroelectronics STM32F103RBT7 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F103RBT7 STM32F1 MCU, ARM Cortex-M3 72MHz, 128KB Flash

MPNSTM32F103RBT7
Active

STMicroelectronics STM32F1 series STM32F103RBT7, ARM Cortex-M3 32-Bit MCU, 72MHz, 128KB Flash, 20K x 8 RAM, 51 I/O, CAN, USB, SPI, I2C, 64-LQFP, -40°C to 105°C.

$8.0300Ref. price · indicative, final on quote
STMicroelectronics STM32F103RBT7 datasheet (PDF)
Packaging64-LQFP
RoHSROHS3 Compliant
SeriesSTM32F1
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32F103RBT7 specifications
ParameterValue
SeriesSTM32F1
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2V ~ 3.6V
Operating temperature-40°C ~ 105°C (TA)
Speed72MHz
PackageTray
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 size128KB (128K x 8)

Product details

72 MHz Cortex-M3 with peripheral set for motor control and industrial comms

The STM32F103RBT7: It integrates a rich peripheral set including DMA, motor control PWM, multiple watchdog timers, a temperature sensor, and connectivity for CAN, I2C, IrDA, LIN, SPI, UART/USART, and USB.

The internal oscillator and POR/PVD blocks reduce external BOM count in space-constrained designs.

64-LQFP footprint and I/O count — board-level fit

The STM32F1 series remains a mainstream offering from ST, with ongoing manufacturing and distributor support. No last-time-buy window to track.

Frequently asked questions

How does STM32F103RBT7 compare to the STM32L151CBU6A?

The STM32F103RBT7 offers higher performance and wider temperature coverage, while the series targets battery-operated applications with lower active current. They are not pin-compatible and serve different design priorities.

Can STM32F103RBT7 be used as a replacement for a failed MCU in an existing design?

If the original design used an STM32F103RBT6 or another 64-pin STM32F103 variant with the same Flash and RAM size, the STM32F103RBT7 is a direct drop-in replacement. The 'T7' temperature grade extends the operating range to 105°C, which is a superset of the 85°C grade. Reflash the firmware and verify the supply rail and oscillator configuration match the original.