STMicroelectronics STM32F101RBT6TR

Overview

STM32F101RBT6TR from STMicroelectronics is a medium-density ARM® Cortex®-M3 microcontroller with 128 KB Flash, 16 KB SRAM, 36 MHz max CPU frequency, 12-bit ADC (1 µs conversion), and 7 communication interfaces (2×I²C, 3×USART, 2×SPI). It serves as the main system controller in industrial sensor nodes requiring real-time analog acquisition, serial telemetry, and low-power operation.

For engineers reviewing the STM32F101RBT6TR datasheet, STM32F101RBT6TR pinout, STM32F101RBT6TR application, or STM32F101RBT6TR equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 51 pins), RTC+VBAT support, SWD debug interface, and LQFP64 package compatibility for space-constrained PCB layouts.

Technical Context

The device implements an ARM Cortex-M3 core with Harvard architecture, single-cycle multiplication, and hardware divide - enabling deterministic real-time control at 36 MHz. Its clock system integrates dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), PLL-based CPU clock generation, and independent 40 kHz LSI for watchdog timing.

DMA supports 7 channels with peripheral arbitration for concurrent ADC sampling, SPI transfers, and USART buffering without CPU intervention. The NVIC provides 64 interrupt lines with programmable priority, supporting nested execution for time-critical event handling in motor control and sensor fusion applications.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in enclosed industrial enclosures and compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, STM32F101RBT6TR delivers higher compute throughput and integrated analog features; versus STM32F103C8T6, it offers 2× Flash, +16 KB SRAM, and +13 GPIOs - justifying use in scalable sensor platforms requiring future firmware expansion and multi-peripheral concurrency.

Availability

STM32F101RBT6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, energy metering endpoints, and PLC I/O expansion modules requiring stable component supply across extended production lifecycles.

Supply support for STM32F101RBT6TR 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, designing and manufacturing microcontrollers, power ICs, MEMS, and automotive electronics since 1987.

The STM32F101 series belongs to ST's foundational Cortex-M3 portfolio targeting cost-sensitive industrial and consumer applications - emphasizing robustness, low-power operation, and broad peripheral integration for rapid prototyping and volume deployment.

FAQ

What is the maximum operating frequency and associated power consumption?

The STM32F101RBT6TR operates up to 36 MHz with typical active current of 24 mA at 3.6 V (Table 12). At 8 MHz, current drops to ~9 mA. All values assume code execution from Flash with peripherals enabled - actual consumption depends on I/O toggle rate, peripheral clock gating, and regulator mode (Run vs. Low-power).

Does this MCU support USB or CAN interfaces?

No. The STM32F101RBT6TR does not integrate USB or CAN peripherals. It provides 2×I²C, 3×USART, and 2×SPI for wired communication. For CAN applications, ST recommends the STM32F103 or STM32F105 families, which include bxCAN controllers.

What debug interfaces are supported and what hardware is needed?

It supports Serial Wire Debug (SWD) using SWDIO and SWCLK pins - requiring only a 2-wire connection to ST-LINK/V2 or compatible debug probe. JTAG is also available but unused in minimal configurations. No external pull-ups or level shifters are needed for standard 3.3 V debug adapters.

How is the 12-bit ADC calibrated and what accuracy can be expected?

The ADC includes factory-calibrated offset/gain coefficients stored in system memory. With internal reference and room-temperature conditions, typical INL is ±1 LSB (Table 44). Using external VREF+ (e.g., 3.0 V) and temperature compensation via the on-die sensor improves end-to-end accuracy to ±0.5% FS across –40°C to +85°C.