STMicroelectronics STM32F101T6U6

Overview

STM32F101T6U6 from STMicroelectronics is a low-density ARM® Cortex®-M3 microcontroller in VFQFPN36 package, featuring 32 KB Flash, 6 KB SRAM, 36 MHz max CPU frequency, 12-bit ADC with temperature sensor, and four communication interfaces (I²C, two USARTs, SPI). It serves as a main system controller in compact industrial sensors and battery-powered metering devices requiring integrated analog sensing and serial connectivity.

For engineers reviewing the STM32F101T6U6 datasheet, STM32F101T6U6 pinout, STM32F101T6U6 application, or STM32F101T6U6 equivalent, key selection considerations include its 36-pin VFQFPN footprint, 32 KB Flash/6 KB SRAM memory configuration, 12-bit ADC accuracy (±2 LSB INL), RTC with VBAT backup, and SWD/JTAG debug support for resource-constrained embedded designs.

Technical Context

The STM32F101T6U6 implements an ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide, executing at up to 36 MHz with 1.25 DMIPS/MHz performance. Its clock system integrates dual oscillators (8 MHz HSI, 32 kHz LSE), PLL for CPU clock scaling, and programmable voltage detector (PVD) for supply monitoring.

DMA supports 7 channels servicing timers, ADC, SPI, I²C, and USART peripherals concurrently; nested vectored interrupt controller (NVIC) manages up to 48 interrupts with configurable priority, while EXTI routes external events to 16 GPIO lines for wake-up from Stop/Standby modes.

Key Specifications

Pinout & Package

VFQFPN36 (6 × 6 mm, 0.5 mm pitch) is a leadless, surface-mount package with exposed thermal pad for enhanced thermal dissipation in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F030F4P6, the STM32F101T6U6 provides superior analog integration and battery-backed timekeeping; versus STM32F103T6U6, it trades Flash/SRAM capacity for lower BOM cost and identical footprint-ideal for fixed-function, volume-sensitive sensor endpoints.

Availability

STM32F101T6U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy meters, medical wearable patches, and PLC I/O modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for STM32F101T6U6 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, designing and manufacturing microcontrollers, power management ICs, MEMS, and automotive electronics since 1987.

The STM32F1 Series targets cost-sensitive, general-purpose embedded applications with balanced performance, analog integration, and industrial-grade reliability-optimized for sensor fusion, motor control, and human-machine interface subsystems.

FAQ

What is the maximum operating frequency and associated power consumption of the STM32F101T6U6?

The STM32F101T6U6 operates at up to 36 MHz with typical active current of 19 mA at 3.3 V and 36 MHz (code from Flash, peripherals enabled). At 8 MHz, current drops to ~7 mA. These values are measured per datasheet conditions (DocID15058 Rev 6, Table 12) and assume proper decoupling and minimal peripheral activation.

Does the STM32F101T6U6 support hardware debugging, and which interfaces are available?

Yes, it supports Serial Wire Debug (SWD) and JTAG via dedicated SWDIO/SWCLK/NRST pins. SWD is the recommended 2-pin interface for programming and real-time debugging; JTAG is fully supported but requires five pins. Both interfaces operate at full CPU speed and enable breakpoints, watchpoints, and memory inspection without halting execution.

Can the STM32F101T6U6 drive 5 V logic levels directly, and which pins are tolerant?

All GPIOs except PC13, PC14, and PC15 are 5 V-tolerant when configured as inputs or open-drain outputs. This allows direct interfacing with 5 V peripherals like legacy UART transceivers or I²C pull-ups without level shifters. However, output voltage swing remains limited to VDD (max 3.6 V), so external drivers are needed for true 5 V output signaling.

What are the key differences between the STM32F101T6U6 and STM32F103T6U6 beyond Flash size?

Beyond 32 KB vs. 64 KB Flash and 6 KB vs. 20 KB SRAM, the STM32F103T6U6 adds CAN 2.0B controller, additional general-purpose timers, and enhanced ADC features (dual-sampling, injected channels). The STM32F101T6U6 omits CAN and reduces timer count-making it lighter-weight for non-networked, cost-driven applications where those peripherals are unused.