STMicroelectronics STM32F102RBT6TR

Overview

STM32F102RBT6TR from STMicroelectronics is a medium-density Arm® Cortex®-M3 microcontroller with 128 KB Flash, 16 KB SRAM, USB 2.0 Full-Speed interface, 12-bit ADC (1.2 µs conversion), and 48 MHz CPU clock-designed for embedded USB-connected control applications such as industrial sensor gateways and USB HID peripherals.

For engineers reviewing the STM32F102RBT6TR datasheet, STM32F102RBT6TR pinout, STM32F102RBT6TR application, or STM32F102RBT6TR equivalent, key selection factors include USB FS PHY integration, 51 I/Os (37 5V-tolerant), low-power Stop/Standby modes with RTC backup, and full compatibility within the STM32F102xB family.

Technical Context

The device implements an Arm Cortex-M3 core with single-cycle multiplication and hardware division, supporting deterministic real-time execution at up to 48 MHz. Its clock system integrates dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), programmable PLL, and factory-trimmed 8 MHz HSI RC source.

Peripheral architecture includes seven-channel DMA servicing timers, ADC, USARTs, SPIs, I²Cs, and USB; nested vectored interrupt controller (NVIC) supports 64 interrupts with configurable priority; memory-mapped I/O enables direct peripheral register access without address decoding overhead.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in compact industrial PCB layouts 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 STM32F072RBT6, this part offers superior real-time determinism and analog sensing; compared with STM32F103RBT6, it trades Flash/RAM headroom for integrated USB FS and lower active power - ideal for compact, USB-native edge nodes.

Availability

STM32F102RBT6TR is available at Aetrix Electronics and suitable for industrial sensor gateways, USB HID peripherals, PLC I/O modules, and portable medical diagnostic tools requiring stable component supply across multi-year production cycles.

Supply support for STM32F102RBT6TR 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, specializing in microcontrollers, power management, and automotive ICs with strong industrial and embedded market focus.

This device belongs to the STM32F102 USB Access Line - designed specifically for cost-sensitive, USB-connected embedded control applications requiring integrated connectivity and low-power operation.

FAQ

Does STM32F102RBT6TR support USB device enumeration without external components?

Yes. It integrates a full-speed USB 2.0 transceiver with internal pull-up resistors on PA11/PA12, enabling HID, CDC, and MSC class enumeration directly from firmware without external PHY or resistor networks. The USB clock is derived from the PLL, and descriptors are stored in on-chip Flash.

What is the maximum operating temperature range for industrial use?

The STM32F102RBT6TR is qualified for –40 °C to +85 °C ambient operation per ST's industrial grade specification. Electrical characteristics-including ADC accuracy, USB timing, and I/O drive strength-are guaranteed across this full range, with validated thermal derating up to 105 °C junction temperature under defined PCB layout conditions.

Can the internal 8 MHz RC oscillator be used as the system clock source?

Yes. The factory-trimmed 8 MHz HSI RC oscillator serves as a valid system clock source and can feed the PLL to achieve 48 MHz CPU frequency. It requires no external components and supports fast startup (<4 µs), making it ideal for applications where crystal cost or board space is constrained - though with ±1% typical accuracy versus ±50 ppm for external crystals.

How many of the GPIOs support external interrupt capability?

All 51 GPIOs are mappable to 16 external interrupt vectors via the EXTI controller. Each port group (PA–PC) shares one vector, allowing flexible assignment of rising/falling edge or level-triggered interrupts across multiple pins - essential for responsive button, sensor, or communication event handling in real-time systems.