STMicroelectronics STM32F101R8T6TR

Overview

STM32F101R8T6TR from STMicroelectronics is a medium-density ARM® Cortex®-M3 microcontroller with 64 KB Flash, 10 KB SRAM, 36 MHz max CPU frequency, 12-bit ADC (1 µs conversion), and 7 communication interfaces including 3 USARTs, 2 I²C, and 2 SPI. It operates from 2.0–3.6 V and supports Sleep/Stop/Standby low-power modes - deployed in industrial sensor nodes requiring deterministic real-time control and serial telemetry.

For engineers reviewing the STM32F101R8T6TR datasheet, STM32F101R8T6TR pinout, STM32F101R8T6TR application, or STM32F101R8T6TR equivalent, key selection considerations include Flash/SRAM size matching, LQFP48 package compatibility, 36 MHz timing margin for RTOS scheduling, and 5 V-tolerant GPIO support for mixed-voltage peripheral interfacing.

Technical Context

This MCU implements the ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide - enabling deterministic interrupt latency under 12 cycles. Its clock system integrates dual oscillators (8 MHz HSI + 32.768 kHz LSE), programmable PLL, and PVD for supply monitoring.

The peripheral set is tightly coupled via AHB/APB buses: 7-channel DMA services ADC, timers, and all serial interfaces; NVIC supports 64 interrupts with 16 priority levels; and EXTI maps up to 16 GPIO pins to external event lines with debounce filtering.

Key Specifications

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for compact industrial PCBs requiring reflow-solderable, hand-solderable, and automated assembly compatibility.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F101R8T6TR, STM32F030F4P6 trades real-time determinism and feature depth for lower unit cost, while STM32F103C8T6 extends capability into USB-connected applications - making the R8T6 optimal for cost-constrained, non-USB industrial control where RTC and CRC are essential.

Availability

STM32F101R8T6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, PLC I/O expansion modules, and medical diagnostic handhelds requiring stable component supply across multi-year production cycles.

Supply support for STM32F101R8T6TR 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, MEMS, and automotive semiconductors since 1987.

The STM32F101xx series belongs to ST's "access line" product family - engineered for cost-sensitive, high-volume industrial and consumer applications demanding reliable real-time performance, low-power operation, and broad peripheral integration without premium feature overhead.

FAQ

What is the maximum operating temperature range for STM32F101R8T6TR?

The STM32F101R8T6TR is rated for industrial temperature range: –40°C to +85°C ambient. This is validated per ST's characterization data (Section 5.3.1, DocID13586 Rev 17), with junction temperature limited to 125°C under continuous operation at 3.6 V and 36 MHz. Thermal derating applies above 70°C ambient when all peripherals are active.

Does STM32F101R8T6TR support in-application programming (IAP)?

Yes - the device supports IAP via its embedded bootloader, which resides in system memory and can be activated via BOOT0 pin or option byte configuration. Firmware updates can be performed over USART, I²C, or SPI using ST's DFU protocol or custom host-side tools, with Flash write/erase operations managed by hardware ECC and write-protection bits.

Is the LQFP48 package of STM32F101R8T6TR RoHS and REACH compliant?

Yes - the STM32F101R8T6TR uses ST's ECOPACK®2-compliant LQFP48 package, certified to RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Full material declarations and substance thresholds are published in ST's official Product Change Notification (PCN) documents and accessible via ST's Quality Portal.

Can STM32F101R8T6TR drive a standard 16×2 character LCD directly?

No - it lacks integrated LCD controller hardware. However, its 51 GPIOs and flexible timer peripherals allow bit-banged 4-bit or 8-bit parallel LCD driving, or use of dedicated segments via GPIO toggling synchronized to SysTick. For production designs, ST recommends pairing with ST7036 or equivalent controller IC to reduce firmware overhead and improve display reliability.