STMicroelectronics STM32F101CBT6TR

Overview

STM32F101CBT6TR from STMicroelectronics is a medium-density ARM® Cortex®-M3 32-bit microcontroller with 128 KB Flash, 16 KB SRAM, 36 MHz CPU frequency, 12-bit ADC (1 µs conversion), and 7 communication interfaces (including 3 USARTs, 2 I²C, 2 SPI). It operates from 2.0–3.6 V and supports industrial temperature range (–40 to +85 °C), deployed in motor control subsystems, sensor interface modules, and programmable logic controllers.

For engineers reviewing the STM32F101CBT6TR datasheet, STM32F101CBT6TR pinout, STM32F101CBT6TR application, or STM32F101CBT6TR equivalent, key selection criteria include Flash/SRAM size, 36 MHz real-time performance, 5 V-tolerant GPIO count (up to 37), integrated RTC with VBAT support, and SWD/JTAG debug compatibility for embedded firmware development.

Technical Context

The STM32F101CBT6TR implements an ARM Cortex-M3 core with single-cycle multiplication, hardware division, and nested vectored interrupt controller (NVIC) supporting up to 64 interrupts. Its clock system integrates a 4–16 MHz external crystal oscillator, 8 MHz internal RC, 40 kHz LSI, and PLL for scalable CPU clock generation up to 36 MHz.

Peripheral integration includes three 16-bit general-purpose timers (each with IC/OC/PWM), independent and window watchdogs, SysTick timer, 7-channel DMA supporting memory-to-peripheral transfers, and a 12-bit ADC with temperature sensor channel and 0–3.6 V input range - all mapped to a unified memory-mapped I/O architecture with full register-level accessibility.

Key Specifications

Pinout & Package

STM32F101CBT6TR uses a UFQFPN48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad, optimized for compact PCB layouts and thermal dissipation in space-constrained applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F103CBT6, the STM32F101CBT6TR provides 64 KB more Flash for robust field-upgradable firmware, while STM32F072CBT6 trades Cortex-M3 determinism for USB-native capability - making STM32F101CBT6TR optimal for industrial control where Flash headroom and interrupt latency are critical.

Availability

STM32F101CBT6TR is available at Aetrix Electronics and suitable for motor control subsystems, sensor interface modules, and programmable logic controllers requiring stable component supply across extended production lifecycles.

Supply support for STM32F101CBT6TR 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 with ISO 9001-certified manufacturing.

The STM32F101xx series belongs to ST's "medium-density access line" product family, designed specifically for cost-sensitive industrial and consumer applications demanding balanced performance, peripheral richness, and long-term supply assurance without premium feature sets.

FAQ

What is the maximum operating frequency and associated power consumption of STM32F101CBT6TR?

STM32F101CBT6TR achieves a maximum CPU frequency of 36 MHz with 1.25 DMIPS/MHz performance. At 36 MHz and 3.3 V supply, typical active-mode current consumption is 29 mA (code running from Flash, peripherals enabled), rising to 36 mA at 3.6 V. This is measured under conditions defined in ST's DocID13586 Rev 17 Section 5.3.5, with all clocks and GPIOs active.

Does STM32F101CBT6TR support hardware encryption or secure boot features?

No, STM32F101CBT6TR does not integrate hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It lacks TrustZone, ROP protection, or embedded secure key storage. Security relies on software-implemented algorithms and external secure elements. For certified secure boot, ST recommends STM32L4x or STM32H7 series with dedicated security peripherals.

Can STM32F101CBT6TR drive 5 V logic directly without level shifters?

Yes, up to 37 GPIO pins on STM32F101CBT6TR are 5 V-tolerant when configured as inputs or open-drain outputs, per Section 5.3.13 of the datasheet. However, output high level is limited to VDD (max 3.6 V), so driving 5 V CMOS inputs requires verifying VIH(min) ≥ 3.15 V - confirmed for standard 5 V TTL and most 5 V CMOS families.

What debug interfaces are supported, and what tools are required?

STM32F101CBT6TR supports Serial Wire Debug (SWD) and JTAG via dedicated pins (SWDIO, SWCLK, JTCK, JTDI, JTDO, JTMS). ST-LINK/V2 or compatible CMSIS-DAP debug probes are required. No external debugger hardware is needed for basic programming and debugging - SWD uses only two pins and is fully supported by STM32CubeIDE, Keil MDK, and GCC-based toolchains.