STMicroelectronics STM32F103VBI6

Overview

STM32F103VBI6 from STMicroelectronics is a medium-density performance-line Arm® Cortex®-M3 microcontroller featuring 128 KB Flash, 20 KB SRAM, 72 MHz CPU frequency, USB 2.0 full-speed interface, and CAN 2.0B Active support. It integrates dual 12-bit ADCs (1 µs conversion), seven timers including motor-control PWM with dead-time generation, and operates across 2.0–3.6 V supply for industrial motor control, smart sensor nodes, and USB-connected embedded gateways.

For engineers reviewing the STM32F103VBI6 datasheet, STM32F103VBI6 pinout, STM32F103VBI6 application, or STM32F103VBI6 equivalent, key selection criteria include its LFBGA100 package with 80 I/Os, 32 kHz RTC oscillator with calibration, SWD/JTAG debug support, and compatibility with ST's STM32 Standard Peripheral Library and HAL drivers.

Technical Context

The STM32F103VBI6 implements an Arm Cortex-M3 core with Harvard architecture, single-cycle multiplication, and hardware divide, enabling deterministic real-time execution at 72 MHz. Its clock system includes a 4–16 MHz external crystal oscillator, factory-trimmed 8 MHz internal RC, and PLL supporting precise USB and CAN timing synchronization.

Peripheral integration follows a tightly coupled memory-mapped architecture: NVIC supports 68 interrupt channels, DMA controller handles 7 streams with peripheral arbitration, and GPIOs provide 5 V-tolerant operation on most pins with remappable alternate functions across 16 external interrupt vectors.

Key Specifications

Pinout & Package

LFBGA100 package with exposed thermal pad, 10 × 10 mm body, 0.8 mm ball pitch, and RoHS-compliant ECOPACK® construction. Designed for reflow soldering and thermal reliability in convection-cooled industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with STM32F103C8T6, the STM32F103VBI6 adds CAN, 64 KB more Flash, and 43 additional I/Os in LFBGA100-critical for multi-peripheral industrial control. Versus STM32F401CEU6, it trades floating-point and higher clock speed for guaranteed CAN 2.0B compliance and lower power in Stop mode (2.3 µA vs 12 µA).

Availability

STM32F103VBI6 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, and USB-connected edge sensor nodes requiring stable component supply over extended production lifecycles.

Supply support for STM32F103VBI6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STM32F103 product line delivers cost-optimized Cortex-M3 solutions targeting industrial automation, consumer appliances, and automotive subsystems where USB, CAN, and real-time determinism are essential.

FAQ

What is the maximum operating temperature range for STM32F103VBI6?

The STM32F103VBI6 is rated for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 5.3.1 of the DS5319 datasheet, with thermal characteristics validated for LFBGA100 package under natural convection conditions. No derating is required within this range when PCB layout follows ST's recommended copper pour and thermal via guidelines.

Does STM32F103VBI6 support USB device mode only, or can it act as a USB host?

The STM32F103VBI6 implements a USB 2.0 full-speed device-only controller with integrated transceivers and endpoint buffers-no USB host capability. It supports CDC, HID, and MSC classes via software stack. Host functionality requires external PHY and USB OTG IP, which is absent in this part; see Section 2.3.20 and Table 46 in DS5319 for electrical and protocol limits.

How many independent PWM outputs can be generated simultaneously on STM32F103VBI6?

Up to 16 independent PWM outputs are possible: 12 from three 16-bit general-purpose timers (4 channels each), plus 4 from the dedicated 16-bit motor-control timer. All channels support programmable polarity, dead-time insertion (motor timer only), and synchronization triggers. This is detailed in Section 2.3.15 and Table 4 of the datasheet.

Is the internal 8 MHz RC oscillator sufficiently accurate for USB timing without an external crystal?

No-the internal 8 MHz RC oscillator has ±1% typical accuracy, exceeding USB full-speed timing tolerance (±0.25%). An external 4–16 MHz crystal is mandatory for USB operation, as stated in Section 5.3.7 and Figure 2 (clock tree). The RC oscillator may be used for non-USB applications like UART or SPI where timing margin is relaxed.