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STMicroelectronics STM32F091VCT6U
- Part No.:
- STM32F091VCT6U
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32F091VCT6U.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,740
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Product details
Overview
STM32F091VCT6U 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 DAC channels, and 12-bit ADC with 16 inputs - deployed in industrial motor control, smart metering, and automotive body electronics requiring real-time CAN communication and analog signal conditioning.
For engineers reviewing the STM32F091VCT6U datasheet, STM32F091VCT6U pinout, STM32F091VCT6U application, or STM32F091VCT6U equivalent, key selection criteria include CAN interface support, 48 MHz max CPU frequency, 88 I/Os (69 with 5V tolerance), RTC with calibration, and SWD debug capability - all confirmed in ST's production data sheet DocID026284 Rev 4.
Technical Context
This MCU implements an ARM Cortex-M0 core with deterministic interrupt latency and Thumb-2 instruction set, paired with a 48 MHz internal HSI48 oscillator trimmed via external synchronization. Its memory subsystem includes 256 KB of Flash with error correction and 32 KB of SRAM with hardware parity checking for functional safety compliance.
The peripheral architecture integrates dual-domain I/O (VDDIO2 for 19 pins), a 12-channel DMA controller, and dedicated hardware blocks including HDMI CEC wakeup logic, capacitive touch sensing (24 channels), and two independent analog comparators with programmable hysteresis - enabling mixed-signal edge-node applications without external signal conditioning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 48 MHz max - enables deterministic real-time task scheduling in safety-critical firmware. |
| Flash Memory | 256 KB with ECC - supports robust firmware storage and over-the-air update resilience. |
| SRAM | 32 KB with HW parity - meets IEC 61508 SIL-2 requirements for RAM integrity monitoring. |
| ADC | 12-bit, 1.0 µs conversion, 16-channel - suitable for precision current/voltage sampling in motor drives. |
| DAC | Two 12-bit channels - enables simultaneous analog waveform generation for sensor simulation or actuator biasing. |
| CAN Interface | CAN 2.0B compliant, 1 Mbit/s - provides automotive-grade serial bus connectivity for ECU intercommunication. |
| I/O Count | 88 GPIOs, 69 with 5V tolerance - allows direct interfacing with legacy 5V peripherals without level shifters. |
| Debug Interface | Serial Wire Debug (SWD) - enables non-intrusive real-time debugging and flash programming via standard JTAG/SWD probes. |
Pinout & Package
LQFP100 (14 × 14 mm, 0.5 mm pitch), ECOPACK®2-compliant, with exposed thermal pad for enhanced thermal dissipation in continuous operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power supply and ground rails | Separate analog/digital domains ensure noise isolation for ADC/DAC accuracy; VDDA must be ≥2.4 V for full 12-bit linearity. |
| PA13/PA14 | SWDIO/SWCLK | Dedicated 2-pin debug interface - occupies minimal PCB area and avoids conflict with main GPIO functions. |
| PD0/PD1 | CAN_RX/CAN_TX | Direct connection to ISO 11898-compliant transceiver - requires external 120 Ω termination and common-mode choke. |
| PC13/PC14/PC15 | RTC_OUT/OSC32_IN/OSC32_OUT | Supports 32.768 kHz crystal for calendar RTC with ±20 ppm accuracy and periodic wake-up from Stop mode. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | Up to 69 pins tolerate 5V input while powered at 2.0–3.6 V - simplifies integration with industrial sensors and actuators. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Touch Sensing | 24-channel TSC with built-in charge transfer and filtering - eliminates need for external touch controller IC in HMI panels. |
| Low-Power Modes | Sleep, Stop, Standby with RTC/VBAT backup - achieves <1 µA standby current, extending battery life in portable meters. |
| HDMI CEC Support | Hardware CEC receiver with header detection wakeup - enables remote control interoperability in consumer electronics gateways. |
| CRC Calculation Unit | Dedicated hardware CRC-32 engine - accelerates firmware image verification and communication frame checksumming. |
| Programmable Voltage Detector | Configurable PVD threshold (2.0–2.9 V) with interrupt - protects against brown-out corruption during power transitions. |
Applications
| Industrial Motor Control | Smart Energy Metering |
|---|---|
Use Scenario: Closed-loop BLDC motor commutation with current sensing and PWM timing. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, managing 6-channel advanced timer (TIM1), ADC sampling, and CAN-based status reporting. Use Value: Integrated 12-bit ADC + DAC + CAN reduces BOM count by eliminating external signal chain components and bus translators. | Use Scenario: Polyphase electricity meter with tariff switching, tamper detection, and PLC/CAN backhaul. IC Role / Device Role / Timing Role: System-on-chip handling metrology calculations, RTC-based billing cycles, and secure firmware updates via CAN. Use Value: 32 KB SRAM with parity and 256 KB Flash enable dual-bank firmware updates and cryptographic stack execution within memory safety boundaries. |
| Automotive Body Electronics | Home Appliance HMI |
Use Scenario: Door module controlling window lift, mirror adjustment, and lighting via LIN/CAN gateway. IC Role / Device Role / Timing Role: CAN node with LIN master capability, driving relays and reading Hall-effect sensors via GPIO and timers. Use Value: 88 I/Os (69 5V-tolerant) interface directly with 12 V automotive sensors and actuators; SWD enables in-vehicle firmware reprogramming. | Use Scenario: Touch-enabled oven control panel with rotary encoder emulation and LED dimming. IC Role / Device Role / Timing Role: Capacitive touch controller (TSC) + PWM generator (TIM17) + I²C display driver interface. Use Value: 24-channel TSC supports multi-touch sliders and proximity wake-up; internal 48 MHz oscillator ensures consistent touch response timing. |
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, 12-bit DAC only single channel | Lacks CAN 2.0B and second DAC channel - unsuitable for dual-analog-output or automotive bus systems | Select only if CAN and dual DAC are not required and cost reduction is primary. |
| STM32F303VCT6 | Cortex-M4F core, 72 MHz, FPU, 256 KB Flash, CAN, dual DAC, but higher power consumption | Higher performance and floating-point capability - justified only when real-time DSP or complex control loops are needed | Choose when vector math or FFT-based analysis is required; otherwise STM32F091VCT6U offers better power/performance balance. |
Compared with STM32F072VBT6, this part adds CAN and dual DAC at identical package size; versus STM32F303VCT6, it delivers sufficient real-time control with lower static current (120 µA vs 220 µA in Stop mode), making it optimal for battery-backed industrial nodes.
Availability
STM32F091VCT6U is available at Aetrix Electronics and suitable for industrial motor control, smart metering, and automotive body electronics requiring stable component supply across long-lifecycle deployments.
Supply support for STM32F091VCT6U 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32F0 series targets cost-sensitive, low-power embedded applications demanding ARM Cortex-M0 performance with rich analog/mixed-signal peripherals - optimized for rapid development and high-volume manufacturability.
FAQ
What is the maximum operating temperature range for STM32F091VCT6U?
The STM32F091VCT6U is qualified for industrial temperature range: –40 °C to +85 °C. This is verified per ST's characterization data in Section 6.3.1 of DocID026284 Rev 4, with thermal derating applied above 70 °C ambient when operating at full 48 MHz with all peripherals active.
Does STM32F091VCT6U support USB device functionality?
No, STM32F091VCT6U does not integrate a USB PHY or USB controller. It lacks dedicated USB endpoints, descriptors, or clocking circuitry. For USB connectivity, external USB-to-UART bridges (e.g., CP2102) or migration to STM32F072/F042 series is required.
Can the internal 48 MHz oscillator be used as system clock without external crystal?
Yes - the HSI48 oscillator is factory-trimmed and fully usable as system clock source. It supports automatic trimming via USB SOF or external synchronization signals, achieving ±2% accuracy across voltage and temperature, sufficient for UART, SPI, and CAN timing without external crystal.
How many independent power domains does STM32F091VCT6U support?
It supports three independent power domains: VDD/VSS (digital core and I/Os), VDDA/VSSA (analog peripherals), and VBAT (RTC and backup registers). VDDIO2 provides separate supply for 19 I/Os, allowing mixed-voltage interfacing while maintaining digital domain integrity.
STM32F091VCT6U 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:
- 256KB (256K 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:
STM32F091VCT6U FAQ
1.How can I place an order for STM32F091VCT6U through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F091VCT6U 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 STM32F091VCT6U reliable?
The price and inventory of STM32F091VCT6U are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F091VCT6U is usually 5 days.
3.What payment methods are accepted for STM32F091VCT6U?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F091VCT6U transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F091VCT6U?
STM32F091VCT6U orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F091VCT6U 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 STM32F091VCT6U?
For technical support, including STM32F091VCT6U datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F091VCT6U requirements.
6.How does Aetrix verify that STM32F091VCT6U is sourced from the original manufacturer or authorized distributors?
All STM32F091VCT6U 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 STM32F091VCT6U meets industry standards.
7.What is the process for return or replacement of STM32F091VCT6U?
All STM32F091VCT6U units undergo pre-shipment inspection (PSI). If there is an issue with STM32F091VCT6U, 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 STM32F091VCT6U part is unused and in its original packaging.
Return procedure for STM32F091VCT6U:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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