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STMicroelectronics STM32F103VBI6TR — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F103VBI6TR ARM Cortex-M3 MCU, 72 MHz, 128 KB Flash

MPNSTM32F103VBI6TR
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STMicroelectronics STM32F103VBI6TR, STM32F1 series, 32-bit ARM Cortex-M3 MCU, 72 MHz, 128 KB Flash, 20 KB SRAM, 80 I/O, CAN/USB/SPI/I²C, -40°C to 85°C, 100-UFBGA (7x7), Tape & Reel.

$4.8423Ref. price · indicative, final on quote
STMicroelectronics STM32F103VBI6TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F103VBI6TR 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)
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)80
Core processorARM® Cortex®-M3
Case100-UFBGA
Data convertersA/D 16x12b; D/A 2x12b
Program memory size128KB (128K x 8)

Product details

The STM32F103VBI6TR: The 72 MHz ARM Cortex-M3 core is the throughput ceiling for this MCU. At this speed, the part can handle a real-time control loop with a few hundred microseconds of headroom, run a lightweight protocol stack (CANopen, Modbus, USB device), and still leave MIPS for background tasks. The 128 KB Flash and 20 KB SRAM are sized for mid-range firmware — a motor-control algorithm with field-oriented control, a sensor hub aggregating SPI and I²C data, or a simple HMI with a small frame buffer. If the application needs more than 20 KB of RAM for data logging or a larger protocol buffer, this part will run out of headroom; that is the first fit check for the BOM line.

100-UFBGA (7x7) — compact footprint, different rework rules

The 100-UFBGA (7x7) package is the key differentiator from the more common LQFP variants. It saves board area — the 7x7 mm body is smaller than a 100-pin LQFP — but it is a BGA, so the PCB needs a via-in-pad or microvia stackup, and rework requires a hot-air station with a BGA nozzle and a preheat plate.

Peripheral set — CAN, USB, SPI, I²C, UART

The connectivity block includes CANbus, USB, SPI, I²C, UART/USART, IrDA, and LINbus — enough to talk to most industrial sensors, motor drives, and human-machine interfaces without an external bridge chip.

Frequently asked questions

What is the closest pin-compatible alternative to STM32F103VBI6TR in the STM32F1 family?

The STM32F103VBT6 is a common pin-compatible alternative in the same STM32F1 series. It shares the same 100-pin LQFP footprint (not the UFBGA of this part), the same 128 KB Flash and 20 KB SRAM, and the same 72 MHz core. The VBI6TR uses a 100-UFBGA (7x7) package, while the VBT6 uses a 100-LQFP — the die is the same, so the electrical and firmware behavior is identical, but the PCB footprint and rework process differ. If your board is laid out for a 100-LQFP, the VBT6 is the drop-in; if you need the smaller BGA footprint, stick with the VBI6TR.

Which distributors stock STM32F103VBI6TR in tape and reel?

This part ships in Tape & Reel (TR) format, which is the standard for automated assembly. Availability through independent distribution is confirmed at quote time — submit an RFQ to check current stock and lead time for reel quantities.