STMicroelectronics STM32F100RBH6B

Overview

STM32F100RBH6B from STMicroelectronics is a 32-bit ARM® Cortex®-M3 microcontroller in LQFP64 package, featuring 128 KB Flash, 8 KB SRAM, 24 MHz max CPU frequency, 12-bit ADC with 16 channels, and dual 12-bit DACs. It integrates 3 USARTs, 2 SPIs, 2 I²Cs, CEC, and advanced timers for motor control and industrial sensing applications.

For engineers reviewing the STM32F100RBH6B datasheet, STM32F100RBH6B pinout, STM32F100RBH6B application, or STM32F100RBH6B equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 51 pins), RTC with VBAT support, SWD/JTAG debug interface, and low-power Stop/Standby modes for battery-powered edge nodes.

Technical Context

The STM32F100RBH6B implements an ARM Cortex-M3 core with single-cycle multiplication and hardware division, delivering 1.25 DMIPS/MHz at 24 MHz. Its clock system includes 4–24 MHz HSE, 8 MHz factory-trimmed HSI, 40 kHz LSI, and PLL for CPU clock generation.

It supports nested vectored interrupt handling (NVIC) with up to 60 interrupts, DMA-driven peripherals (ADC, DAC, USART, SPI, I²C), and real-time clock with calibration. The device features 51 GPIOs-nearly all 5 V-tolerant-with remap capability and external interrupt vector mapping across 16 lines.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 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 STM32F072RBT6 and STM32G071RBT6, the STM32F100RBH6B uniquely delivers dual 12-bit DACs, VBAT-calibrated RTC, and advanced timer dead-time control in a mature, production-proven LQFP64 package-making it optimal for analog-intensive industrial control where functional safety margins and long-term supply stability matter.

Availability

STM32F100RBH6B is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, programmable logic relays, and medical infusion pump controllers requiring stable component supply and long lifecycle support.

Supply support for STM32F100RBH6B 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 MEMS sensors for industrial, automotive, and consumer markets.

The STM32F100 value line targets cost-sensitive, low-power embedded applications requiring rich analog integration (ADC/DAC), real-time control, and robust industrial I/O - balancing performance, peripheral density, and longevity.

FAQ

What is the maximum operating temperature range for STM32F100RBH6B?

The STM32F100RBH6B is rated for industrial temperature range: –40 °C to +85 °C. This is validated per ST's specification table (Section 5.3.1, DocID16455 Rev 9), with thermal characteristics confirmed in Table 53 for LQFP64 package (θ_JA = 46 °C/W). Operation beyond this range may cause timing violations or SRAM retention failure.

Does STM32F100RBH6B support USB device functionality?

No, the STM32F100RBH6B does not include a USB peripheral. Its communication interfaces are limited to up to 3 USARTs, 2 SPIs, 2 I²Cs, and CEC. USB connectivity requires migration to STM32F103 or STM32G0 series devices, which integrate dedicated USB 2.0 FS controllers with PHY.

Can the internal 8 MHz RC oscillator be used as the system clock source without external crystal?

Yes - the 8 MHz HSI oscillator is factory-trimmed to ±1% accuracy and can serve as the main system clock. It supports full 24 MHz operation when used with the PLL (2× multiplier). However, for RTC or communication baud rate accuracy requiring <1% tolerance, an external 32.768 kHz LSE or 4–24 MHz HSE is required.

How many I/O pins support external interrupt capability?

All 51 GPIOs on the STM32F100RBH6B are mappable to 16 external interrupt/event lines (EXTI0–EXTI15) via SYSCFG_EXTICR registers. Each EXTI line can be triggered by rising/falling edges on any of up to four pins sharing that line, enabling flexible wake-up and event detection across the entire I/O bank.