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STMicroelectronics STM32F103TBU6 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F103TBU6 STM32F1 MCU, 72 MHz, 128 KB Flash, 36-VFQFPN

MPNSTM32F103TBU6
Active

STMicroelectronics STM32F1 series, ARM Cortex-M3 32-bit MCU, STM32F103TBU6, 72 MHz, 128 KB Flash, 20 KB RAM, 36-VFQFPN (6x6 mm), -40 to 85°C, ROHS3.

$7.0400Ref. price · indicative, final on quote
Packaging36-VFQFN Exposed Pad
RoHSROHS3 Compliant
SeriesSTM32F1
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32F103TBU6 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 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)26
Core processorARM® Cortex®-M3
Case36-VFQFN Exposed Pad
Data convertersA/D 10x12b
Program memory size128KB (128K x 8)

Product details

Active production — no EOL risk for this BOM line

The STM32F103TBU6: ROHS3 compliant per, so no restriction for EU or global shipping — the part ships without a RoHS exemption expiry concern.

72 MHz Cortex-M3 — the speed ceiling for the STM32F1 value line

The ARM Cortex-M3 core runs at 72 MHz, the maximum clock for the STM32F1 series. This sets the throughput ceiling for control-loop firmware and protocol stacks — the 1.25 DMIPS/MHz rating means roughly 90 DMIPS available before flash wait-states limit instruction fetch. 128 KB of on-chip flash and 20 KB of SRAM provide the memory budget for a real-time control application with a CANopen or USB stack, plus a modest data buffer for sensor logging.

36-VFQFPN 6x6 mm — footprint for space-constrained boards

The on-chip POR and PVD peripherals monitor the supply for brown-out and undervoltage events without an external supervisor.

CAN, USB, motor-control PWM — connectivity for industrial and drive applications

The peripheral set includes CANbus, USB, SPI, I²C, and multiple UART/USART interfaces, plus a motor-control PWM timer and DMA controller. This makes the part suitable for sensor-fusion nodes, small motor drives, and fieldbus gateway modules where the 26 available I/O lines are sufficient. The 10-channel 12-bit ADC captures analog sensor inputs without an external converter — adequate for current-sense feedback, temperature monitoring, or potentiometer position readback in a control loop.

Frequently asked questions

What is STM32F103TBU6's listed speed and memory?

This provides the throughput and memory budget for a real-time control application with a CANopen or USB stack.

Will STM32F103TBU6 drop into a board designed for STM32L151CBU6A?

No — the STM32L151CBU6A is a different package (UFQFPN-48 vs 36-VFQFPN) with 37 I/O lines versus 26, runs at 32 MHz instead of 72 MHz, and has a different peripheral mix (includes DAC, capacitive sensing). A board spin and firmware port are required.