STM32F100RBH6B

STMicroelectronics STM32F100RBH6B – 32‑bit ARM Cortex‑M3 MCU, 128KB Flash, 64‑pin TFBGA

The STMicroelectronics STM32F100RBH6B is a cost‑optimized 32‑bit microcontroller from the STM32F100 Value Line, built on the ARM Cortex‑M3 core. With 128 KB of embedded Flash memory and operation from a single 2.0–3.6 V supply, it targets general‑purpose embedded control where dependable performance, low power, and compact packaging matter. Delivered in a 64‑pin TFBGA and supplied in trays for production use, the STM32F100RBH6B enables efficient, scalable designs across industrial and consumer applications.

Engineers choose the STM32F100 Value Line for its balance of capability and cost. The STM32F100RBH6B carries that value into space‑constrained designs thanks to its fine‑pitch TFBGA package, while maintaining the familiar STM32 development ecosystem and 32‑bit ARM instruction set compatibility typical of the series.

Highlights at a glance

• Brand and MPN: STMicroelectronics STM32F100RBH6B
• Series: STM32F100 Value Line (general‑purpose, cost‑sensitive designs)
• CPU core: ARM Cortex‑M3, 32‑bit
• Embedded Flash: 128 KB
• Supply voltage: 2.0 V to 3.6 V
• Package: 64‑pin TFBGA (tray, surface‑mount)
• Operating temperature: −40°C to +85°C (per device code; see datasheet)
• Category: Microcontrollers – MCU

Note: Peripheral mix, maximum clock frequency, SRAM size, and detailed I/O capabilities are not specified here. Always consult the official datasheet for configuration details before finalizing a design.

Where the STM32F100RBH6B fits

The STM32F100 Value Line is crafted for cost‑sensitive, general‑purpose use. The STM32F100RBH6B variant packages that value into a 64‑pin TFBGA, making it a strong fit for:

• Products needing a small footprint without sacrificing a mainstream 32‑bit MCU architecture
• Designs powered from 2.0–3.6 V rails (e.g., regulated Li‑ion systems, 3.3 V digital logic)
• Applications that benefit from the ARM Cortex‑M3 programming model and STM32 ecosystem

By combining 128 KB of Flash with a proven 32‑bit core, this device supports a broad range of embedded tasks—from housekeeping control loops and protocol handling to user interface logic and supervisory functions.

Key specifications

• Core: ARM Cortex‑M3
• Architecture: 32‑bit
• Embedded Flash memory: 128 KB
• Supply voltage (VDD): 2.0 V to 3.6 V
• Package: TFBGA‑64
• Pin count: 64
• Mounting type: Surface mount
• Operating temperature: −40°C to +85°C (per device code; confirm in datasheet)

Not specified in datasheet excerpt provided here:

• Maximum core clock frequency
• SRAM size
• Peripheral set (timers, ADC/DAC, communication interfaces)
• Low‑power modes and current consumption
• Internal oscillators and clock tree details

For these items, refer to the official STMicroelectronics datasheet and product page linked below.

Package and mechanical considerations

The STM32F100RBH6B comes in a 64‑pin TFBGA package. TFBGA packages enable high I/O density with a small PCB footprint and short interconnects, which can help with signal integrity and EMI when properly designed.

Design and manufacturing pointers:

• Assembly and reflow: Adhere to ST’s recommended reflow profiles and handling procedures for BGAs. Tray packaging supports automated pick‑and‑place in volume production.
• PCB layout: Plan for appropriate escape routing, fan‑out vias, and decoupling on the inner and outer rows according to the package drawing. Keep power and ground return paths short and robust.
• Thermal: In typical MCU workloads, TFBGA packages dissipate heat effectively through board copper. Validate thermal performance across the −40°C to +85°C range per your application profile.
• Inspection: X‑ray inspection and solder‑joint reliability practices are recommended for BGA assemblies in high‑reliability use cases.

For exact ball pitch, package thickness, and land pattern recommendations, consult the latest ST package drawings for the RBH6B ordering code.

Power and operating conditions

• Voltage range: 2.0–3.6 V simplifies operation in 3.3 V digital systems and regulated battery‑powered designs.
• Brownout and reset: Brownout, POR/PDR, and related details are application‑critical; verify exact thresholds and behaviors in the datasheet.
• Clocking: The maximum operating frequency and internal oscillator options are not specified here. Confirm supported clock sources and constraints in the official documentation before defining timing budgets.

Proper decoupling at each supply pin, a solid ground plane, and attention to clock source placement will help the STM32F100RBH6B achieve stable operation across environmental extremes.

Memory and code strategy

• Flash: 128 KB embedded program memory provides room for application logic, RTOS kernels, and communication stacks sized for general‑purpose control.
• RAM: The specific SRAM capacity is not specified in the provided data. Allocate stack/heap carefully after confirming RAM size in the datasheet and linker script.
• Boot and updates: Review the device’s boot options and in‑system programming paths in the datasheet. Plan for robust firmware update and integrity checks appropriate to your application.

Applications

The STM32F100RBH6B targets general‑purpose embedded control. Typical categories include:

• Industrial control and monitoring (e.g., supervisory logic, HMI control, protocol handling)
• Consumer and appliance control (e.g., user interface control loops, motor or actuator coordination)
• Building automation and HVAC control
• Instrumentation, metering front‑ends, or data logging (as permitted by available peripherals)
• General MCU education and platform development where a cost‑optimized 32‑bit core is preferred

Always map application requirements to the specific peripherals, timers, ADC/DAC resources, and communication interfaces documented in the STM32F100 series datasheet to verify fit.

Lifecycle, crosses, and replacements

• Lifecycle status: Not specified. For the latest status, check the STMicroelectronics product page.
• Family alternatives: Within the STM32F100 Value Line, other density or package options may offer pin‑compatible or board‑compatible alternatives. Verify pinout and peripheral availability carefully before substitution.
• Adjacent families: Depending on performance or peripheral needs, other STM32F1 derivatives or newer STM32 families may be considered. Validate supply voltage, clocking, and I/O compatibility during any migration.

If you need second‑source planning, keep your schematic flexible around optional features and confirm any differences in boot configuration, clocking, and debug pins between candidate replacements.

Environmental and regulatory compliance

• RoHS/REACH: Not specified in the provided data. Consult the STMicroelectronics product page and compliance documents for up‑to‑date declarations.
• Halogen‑free and material content: Not specified. Review material content reports and package declaration sheets as required by your quality process.

For formal qualification (e.g., AEC‑Q, functional safety, medical), consult ST’s documentation and your certification body; these aspects are device and application specific and are not covered by the information provided here.

Sourcing and procurement notes

• Packaging format: Tray, suitable for automated assembly in production lines.
• Forecasting: Align lead times and tray counts with your build plan; confirm minimum order quantities with your distributor.
• Handling and storage: Verify moisture sensitivity level (MSL) and bake/re‑bag procedures for TFBGA devices in your quality plan. MSL is not specified here; check the datasheet and packing documentation.
• Change management: Subscribe to PCN/PDN notices from STMicroelectronics or your distributor to stay ahead of lifecycle or manufacturing changes.

Because parameters like lifecycle status and environmental compliance are not fully specified here, always validate against the official ST resources before committing to mass production.

Integration and design‑in tips

• Power integrity: Place multiple high‑frequency ceramic decouplers near each VDD ball and bulk capacitance per power rail. Keep return paths short.
• Grounding: Use a continuous ground plane when possible, and stitch ground vias near high‑speed return loops.
• Reset and boot: Review reset topology, boot mode configuration, and any strapping resistors in the datasheet. Build test points for early bring‑up.
• Clock sources: If using external resonators or oscillators, follow ST’s load capacitor and layout guidance. Validate across temperature extremes.
• Firmware: Start from ST reference code and CMSIS for Cortex‑M3. Confirm memory map and linker settings for the 128 KB Flash configuration.

These recommendations are general best practices; always defer to the STM32F100 series datasheet for device‑specific requirements.

Frequently asked questions (FAQs)

• What CPU core does the STM32F100RBH6B use?
• ARM Cortex‑M3, 32‑bit.
• How much Flash memory is available?
• 128 KB of embedded Flash.
• What is the supply voltage range?
• 2.0 V to 3.6 V.
• What is the package for STM32F100RBH6B?
• 64‑pin TFBGA, supplied in trays and intended for surface‑mount assembly.
• What is the operating temperature range?
• −40°C to +85°C per the device code information provided; verify the exact grading in the datasheet for RBH6B.
• What’s the maximum clock frequency and how much SRAM does it have?
• Not specified in the provided data. Refer to the official datasheet for definitive values and configuration options.
• Does it support specific peripherals (e.g., USB, CAN, multiple ADCs)?
• Not specified here. Consult the STM32F100 series datasheet for the peripheral set applicable to this device.
• Is the STM32F100RBH6B RoHS compliant?
• RoHS/REACH status is not specified in the provided information. Check the ST product page and compliance documentation.

Documentation and resources

• Product page: https://www.st.com/en/microcontrollers-microprocessors/stm32f100-value-line.html
• Datasheet: https://www.st.com/resource/en/datasheet/stm32f100xb.pdf

These sources contain the authoritative specifications, package drawings, and application guidance you should use for design decisions.

Conclusion

The STMicroelectronics STM32F100RBH6B brings the practicality of the STM32F100 Value Line into a compact 64‑pin TFBGA package, pairing a 32‑bit ARM Cortex‑M3 core with 128 KB of Flash and a broad 2.0–3.6 V operating range. It is well suited for cost‑sensitive, general‑purpose embedded control where board space is at a premium. While details like maximum clock frequency, SRAM capacity, and the exact peripheral set are not specified in the information provided here, the official ST datasheet and product page offer everything needed to complete a confident design‑in.

If you’re seeking a mainstream, dependable MCU platform with a compact footprint, the STMicroelectronics STM32F100RBH6B is a strong candidate—especially when paired with disciplined power, clock, and layout practices and validated against the latest ST documentation.