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STMicroelectronics STM32F091VBT6
- Part No.:
- STM32F091VBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32F091VBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:527
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Product details
Overview
STM32F091VBT6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in LQFP100 package, featuring 256 KB Flash, 32 KB SRAM with hardware parity, integrated CAN 2.0B interface, dual 12-bit DACs, and 12-bit ADC (1.0 µs conversion) - deployed in industrial motor control systems requiring real-time analog feedback and fieldbus connectivity.
For engineers reviewing the STM32F091VBT6 datasheet, STM32F091VBT6 pinout, STM32F091VBT6 application, or STM32F091VBT6 equivalent, key selection criteria include CAN timing compliance, 5V-tolerant I/O count (69 pins), VDDA supply range (2.4–3.6 V), and HSI48 oscillator auto-trimming capability for USB-class clock accuracy without external crystal.
Technical Context
The STM32F091VBT6 implements an ARM Cortex-M0 core running at up to 48 MHz, supported by a multi-source clock system including internal 48 MHz HSI48 oscillator with automatic trimming via external synchronization, 4–32 MHz HSE crystal input, and 32 kHz LSE for RTC calibration. Its memory subsystem includes 256 KB of Flash with error correction and 32 KB of SRAM with hardware parity checking.
Peripheral integration centers on deterministic real-time control: one 16-bit advanced-control timer (TIM1) delivering 6-channel complementary PWM with dead-time insertion, two fast low-power comparators with programmable hysteresis, and up to 24 capacitive sensing channels supporting touchkey and rotary sensor interfaces - all operating within 2.0–3.6 V supply range and qualified for industrial temperature grade (–40°C to +85°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 48 MHz max - enables deterministic interrupt latency & real-time task scheduling in resource-constrained embedded control. |
| Flash Memory | 256 KB with ECC - supports robust firmware storage and in-field updates with integrity verification. |
| SRAM | 32 KB with HW parity - detects single-bit errors in critical data buffers and stack regions. |
| ADC | 12-bit, 1.0 µs conversion, 16-channel - captures fast analog transients (e.g., current sensing in motor drives) with <±1 LSB INL. |
| DAC | Two 12-bit channels, monotonic - generates precise reference voltages or analog waveforms for closed-loop biasing or signal injection. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s - enables interoperability with automotive and industrial fieldbus networks without external protocol translator. |
| I/O Pins | 88 total, 69 with 5V tolerance - simplifies level-shifting design when interfacing with legacy 5V peripherals or sensors. |
| Supply Range | VDD = 2.0–3.6 V, VDDA = 2.4–3.6 V - allows direct connection to common 3.3 V power rails while maintaining ADC/DAC accuracy. |
Pinout & Package
LQFP100 (14 × 14 mm, 0.5 mm pitch), ECOPACK®2-compliant, industrial temperature grade (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power and ground domains | Separate analog/digital supplies ensure ADC/DAC noise immunity; VDDA must be ≥2.4 V for full 12-bit linearity. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15, PF0–PF1 | General-purpose I/O | 88 total GPIOs; 69 support 5V tolerance - enables mixed-voltage system integration without external level shifters. |
| PA11/PA12 | USB DM/DP (not implemented on F091) | Not connected - this device lacks USB PHY; pins are available as GPIO or alternate functions (e.g., TIM1_CH4, USART1_CK). |
| PB8/PB9 | CAN_RX/CAN_TX | Dedicated differential CAN bus interface compliant with ISO 11898-1; supports bit rates up to 1 Mbit/s with programmable sample point. |
| PA0 | ADC1_IN0 / TSC_G1_IO1 | Shared analog input and touch-sensing channel - enables dual-use in systems combining precision measurement and human interface. |
| PA4/PA5 | DAC1_OUT1/DAC1_OUT2 | Two independent voltage outputs (0–VREF+) - used for programmable bias generation or waveform synthesis in sensor excitation circuits. |
Key Features
| Feature | Design Value |
|---|---|
| HSI48 oscillator with auto-trimming | Enables USB-compatible 48 MHz clock without external crystal - reduces BOM cost and PCB area in cost-sensitive designs. |
| Advanced-control timer (TIM1) | 6-channel complementary PWM with programmable dead-time - essential for driving 3-phase inverter bridges with shoot-through protection. |
| Capacitive sensing controller (TSC) | Up to 24 channels with built-in charge transfer and acquisition logic - eliminates external touch ICs in HMI applications like control panels. |
| Programmable voltage detector (PVD) | Configurable threshold (2.2–2.9 V) with interrupt output - provides early warning of brown-out conditions before system reset occurs. |
| Calendar RTC with alarm & wakeup | Accurate timekeeping with ±1 ppm drift (using 32 kHz LSE) and Stop/Standby mode resume - enables energy-efficient periodic tasks in battery-backed systems. |
| Two I²C interfaces (Fast Mode Plus) | 1 Mbit/s operation with 20 mA sink capability - drives long traces or multiple slave devices without pull-up resistor redesign. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
|
Use Scenario: Closed-loop control of BLDC motors using current/voltage feedback and Hall sensor inputs. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithm, PWM generation with dead-time, and ADC sampling synchronized to switching edges. Use Value: Integrated TIM1 and 12-bit ADC enable sub-microsecond timing coordination between sensing and actuation - reducing torque ripple and improving efficiency. |
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and gas concentration data. IC Role / Device Role / Timing Role: Low-power scheduler managing sensor polling, data logging to Flash, and CAN-based telemetry transmission. Use Value: Standby current <1 µA with RTC wakeup and VBAT backup preserves battery life >5 years in intermittent-readout deployments. |
| Human-Machine Interface (HMI) | Fieldbus Gateway |
|
Use Scenario: Touch-enabled control panel for HVAC or lighting systems with LED dimming and status indicators. IC Role / Device Role / Timing Role: Capacitive touch sensing, PWM-driven LED brightness control, and serial communication to host MCU. Use Value: On-chip TSC supports 24-channel touch detection without external ICs - cutting component count and EMI susceptibility. |
Use Scenario: Protocol converter bridging Modbus RTU (RS-485) to CANopen networks in factory automation. IC Role / Device Role / Timing Role: Dual-serial interface handler (USART + CAN) with DMA-accelerated packet buffering and CRC validation. Use Value: Simultaneous CAN 2.0B and eight USARTs allow concurrent fieldbus traffic handling - eliminating need for external bridge ASICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072VBT6 | 128 KB Flash, no CAN, 1 DAC channel, same LQFP100 package | Lacks CAN interface and second DAC - unsuitable for CAN-based motor control or dual-output analog generation | Select only if CAN and dual DAC are not required; offers lower cost and identical footprint for non-fieldbus designs. |
| STM32F303VCT6 | FPU-enabled Cortex-M4, 256 KB Flash, 48 KB SRAM, 2x 12-bit ADCs, no TSC | Higher performance but larger code size and power draw; lacks capacitive sensing controller | Choose when floating-point math or higher ADC throughput is needed, but avoid if touch HMI is required or power budget is tight. |
Compared with STM32F072VBT6, the STM32F091VBT6 adds CAN and dual DAC at minimal cost premium - making it optimal for fieldbus-connected analog control. Versus STM32F303VCT6, it trades FPU and dual ADC for lower static power and integrated touch sensing - better suited for battery-aware industrial UIs.
Availability
STM32F091VBT6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, human-machine interfaces, and fieldbus gateways requiring stable component supply across extended product lifecycles.
Supply support for STM32F091VBT6 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 analog components for industrial, automotive, and consumer markets.
The STM32F0 series targets cost-sensitive, low-power embedded applications requiring ARM Cortex-M0 performance with rich peripheral integration - optimized for industrial control, appliance HMI, and sensor edge nodes.
FAQ
Does STM32F091VBT6 support USB device functionality?
No. The STM32F091VBT6 does not include a USB PHY or dedicated USB controller. While PA11/PA12 pins exist in the LQFP100 package, they are unconnected to USB circuitry and function only as GPIO or alternate peripherals (e.g., TIM1_CH4, USART1_CK). USB-capable variants belong to the STM32F072 or STM32F042 families.
What is the maximum allowed VDDA voltage relative to VDD?
VDDA must be equal to or less than VDD, and cannot exceed 3.6 V. The absolute maximum rating specifies VDDA ≤ VDD, with recommended operating range of 2.4 V to 3.6 V. Operating VDDA below 2.4 V degrades ADC/DAC linearity and may cause specification violations per Table 57 and Table 60 in the datasheet.
Can the internal HSI48 oscillator meet USB full-speed timing requirements?
Yes. The HSI48 oscillator features automatic trimming based on external synchronization (e.g., from USB SOF packets or LSE), achieving ±0.25% accuracy over temperature and voltage - sufficient for USB full-speed (12 Mbit/s) operation without an external crystal. This is confirmed in Section 3.6 and Table 43 of DocID026284 Rev 4.
How many I/O pins support independent VDDIO2 supply?
19 I/O pins (PA9–PA15, PB3–PB7, PC6–PC9) support independent VDDIO2 supply, enabling mixed-voltage operation where those pins interface with 1.8 V or 2.5 V peripherals while the core runs at 3.3 V. This is documented in Section 3.7 and Table 13 of the datasheet.
STM32F091VBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-LQFP
- Series:
- STM32F0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0
- Core Size:
- 32-Bit Single-Core
- Speed:
- 48MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 88
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 32K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 19x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F091VBT6 FAQ
1.How can I place an order for STM32F091VBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F091VBT6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32F091VBT6 reliable?
The price and inventory of STM32F091VBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F091VBT6 is usually 5 days.
3.What payment methods are accepted for STM32F091VBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F091VBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F091VBT6?
STM32F091VBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F091VBT6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32F091VBT6?
For technical support, including STM32F091VBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F091VBT6 requirements.
6.How does Aetrix verify that STM32F091VBT6 is sourced from the original manufacturer or authorized distributors?
All STM32F091VBT6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32F091VBT6 meets industry standards.
7.What is the process for return or replacement of STM32F091VBT6?
All STM32F091VBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F091VBT6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32F091VBT6 part is unused and in its original packaging.
Return procedure for STM32F091VBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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