STMicroelectronics STM32F101VBT6

Overview

STM32F101VBT6 from STMicroelectronics is a medium-density ARM® Cortex®-M3 32-bit microcontroller with 128 KB Flash, 16 KB SRAM, 36 MHz max CPU frequency, 7 communication interfaces (including 3x USART, 2x I²C, 2x SPI), and integrated 12-bit ADC with temperature sensor - deployed in industrial sensor nodes requiring real-time control, low-power operation, and multi-protocol connectivity.

For engineers reviewing the STM32F101VBT6 datasheet, STM32F101VBT6 pinout, STM32F101VBT6 application, or STM32F101VBT6 equivalent, key selection considerations include Flash/SRAM capacity, LQFP100 package compatibility, 36 MHz timing budget, 5 V-tolerant GPIO count (up to 80), and support for SWD/JTAG debug in resource-constrained embedded designs.

Technical Context

The STM32F101VBT6 implements an ARM Cortex-M3 core with Harvard architecture, single-cycle multiplication, hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 68 interrupts. Its clock system integrates dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), PLL for CPU clock scaling, and three internal RC sources (8 MHz HSI, 40 kHz LSI, and calibrated RTC oscillator).

DMA operates across seven channels servicing timers, ADC, SPI, I²C, and USART peripherals concurrently; the 12-bit ADC achieves 1 µs conversion time over 0–3.6 V range with 16-channel multiplexing and built-in temperature sensor - enabling closed-loop analog monitoring without external components.

Key Specifications

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for industrial PCB layouts requiring mechanical robustness, thermal dissipation, and high I/O density.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103VBT6, the STM32F101VBT6 trades USB support for lower system cost and identical analog/timing resources; versus STM32F072VBT6, it delivers higher interrupt throughput, richer timer features, and integrated temperature sensing - making it preferable for sensor-dense, real-time deterministic applications.

Availability

STM32F101VBT6 is available at Aetrix Electronics and suitable for industrial automation, smart metering, and building control systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant manufacturing.

Supply support for STM32F101VBT6 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 - serving industrial, automotive, and consumer markets since 1987.

The STM32F101 series belongs to ST's foundational Cortex-M3 access-line portfolio, designed specifically for cost-sensitive, high-reliability embedded applications demanding rich analog integration, multi-protocol connectivity, and industrial-grade operating margins.

FAQ

What is the maximum operating frequency and associated power consumption of the STM32F101VBT6?

The STM32F101VBT6 operates at up to 36 MHz with typical active-mode current of 29 mA at 3.6 V and 36 MHz (code running from Flash, peripherals enabled). At 8 MHz, current drops to ~12 mA under identical conditions - enabling dynamic frequency scaling to balance performance and battery life in portable applications.

Does the STM32F101VBT6 support 5 V-tolerant I/Os, and which pins are compatible?

Yes - up to 80 I/Os are 5 V-tolerant, including all GPIOs on ports A through E except PA13/PA14 (SWDIO/SWCLK) and PB3/PB4 (JTDI/JTDO). This tolerance applies across the full 2.0–3.6 V VDD range and eliminates need for external level shifters when interfacing with 5 V sensors or logic.

How is the internal temperature sensor calibrated, and what accuracy can be expected?

The internal temperature sensor is factory-calibrated at two points (25 °C and 110 °C) and referenced to the 1.20 V internal bandgap voltage. Accuracy is ±1.5 °C over 0–100 °C after applying linear correction using calibration values stored in system memory - sufficient for thermal monitoring and compensation in industrial enclosures.

Can the STM32F101VBT6 be programmed and debugged using standard tools, and what interfaces are supported?

Yes - it supports Serial Wire Debug (SWD) and JTAG via dedicated SWDIO, SWCLK, and NRST pins. Standard ST-LINK/V2 and compatible debuggers enable full flash programming, real-time variable inspection, breakpoint setting, and trace analysis without requiring additional hardware or custom toolchains.