STMicroelectronics STM32F101T8U6

Overview

STM32F101T8U6 from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in UFQFPN36 package, featuring 64 KB Flash, 10 KB SRAM, 36 MHz max CPU frequency, 12-bit ADC with 16 channels, and 7 communication interfaces including 2×I²C, 3×USART, and 2×SPI. It targets cost-sensitive industrial control and sensor node applications requiring low-power operation and integrated analog peripherals.

For engineers reviewing the STM32F101T8U6 datasheet, STM32F101T8U6 pinout, STM32F101T8U6 application, or STM32F101T8U6 equivalent, key selection factors include its 36-pin ultra-thin QFN footprint, 2.0–3.6 V supply range, 5 V-tolerant I/Os, RTC with VBAT backup, and SWD debug support - all critical for space-constrained embedded designs.

Technical Context

The STM32F101T8U6 implements an ARM Cortex-M3 core with single-cycle multiplication and hardware division, executing at up to 36 MHz with 1.25 DMIPS/MHz performance. Its clock system integrates a 4–16 MHz external crystal oscillator, 8 MHz factory-trimmed RC, 40 kHz RC, PLL for CPU clock generation, and 32 kHz RTC oscillator with calibration.

DMA support includes a 7-channel controller servicing timers, ADC, SPI, I²C, and USART peripherals. Power management provides Sleep, Stop, and Standby modes with VBAT-backed RTC and backup registers, enabling battery-operated operation with sub-µA standby current.

Key Specifications

Pinout & Package

UFQFPN36 (Ultra Thin Fine Pitch Quad Flat No-lead) package: 36-pin, 6 × 6 mm body, 0.5 mm pitch, exposed thermal pad, RoHS-compliant, ECOPACK® certified.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F101T8U6, the STM32F030F4P6 reduces cost and power but sacrifices RTC, temp sensor, and communication flexibility; the STM32F103T8U6 retains full compatibility while adding CAN and memory headroom - making it optimal for scalable product families.

Availability

STM32F101T8U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, home automation controllers, and medical diagnostic peripherals requiring stable component supply across long production lifecycles.

Supply support for STM32F101T8U6 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 management ICs, sensors, and automotive-grade components since 1987.

The STM32F101xx series belongs to ST's medium-density access line - engineered specifically for cost-optimized, low-power embedded applications where integration of analog peripherals, communication interfaces, and robust debug capability outweighs need for high-speed processing or large memory.

FAQ

What is the maximum operating frequency and corresponding power consumption of the STM32F101T8U6?

The STM32F101T8U6 operates at up to 36 MHz with typical active current of 19 mA at 3.6 V and 36 MHz (code running from Flash, all peripherals enabled). At 8 MHz, current drops to ~7 mA. These values are measured per datasheet Table 12 and confirmed in Figure 13, with thermal derating applied above 85°C ambient.

Does the STM32F101T8U6 support in-system programming (ISP) without a debugger?

Yes - via USART-based bootloader activated by holding BOOT0 high at reset. The device enters system memory boot mode and accepts firmware uploads using ST's DFU protocol or custom UART commands. No external programmer is required, though SWD remains preferred for development and debugging.

How many of the GPIO pins are 5 V-tolerant, and which ones are not?

All 26 GPIOs on the UFQFPN36 package (PA0–PA15, PB0–PB11) are 5 V-tolerant except NRST and BOOT0. This is explicitly stated in Section 5.3.13 (I/O port characteristics) and verified in Table 33 of the datasheet. Tolerance applies only when VDD is powered; pins must never be driven above VDD + 4 V.

What is the accuracy and calibration status of the internal temperature sensor?

The internal temperature sensor has ±1.5°C accuracy over –40°C to +85°C (Table 45), factory-calibrated with two-point correction stored in system memory. Raw ADC readings require linear interpolation between calibration points at 25°C and 110°C; ST provides reference code in AN2606 for compensated output.