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STMicroelectronics STM32F091RCT6TR
- Part No.:
- STM32F091RCT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F091RCT6TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,404
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Product details
Overview
STM32F091RCT6TR from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller with 256 KB Flash, 32 KB SRAM, integrated CAN 2.0B interface, dual 12-bit DAC, and 12-bit ADC (16-channel, 1.0 µs conversion), operating at up to 48 MHz in 2.0–3.6 V supply range. It supports industrial motor control, smart sensor hubs, and CAN-based building automation systems.
For engineers reviewing the STM32F091RCT6TR datasheet, STM32F091RCT6TR pinout, STM32F091RCT6TR application, or STM32F091RCT6TR equivalent, key selection criteria include CAN timing compliance, 5V-tolerant I/O count (69 pins), RTC+backup register retention under VBAT, SWD debug support, and LQFP64 package thermal performance in convection-cooled enclosures.
Technical Context
The device integrates an ARM Cortex-M0 core with hardware CRC unit, programmable voltage detector (PVD), and three low-power modes (Sleep/Stop/Standby) with RTC wakeup. Clock system includes 4–32 MHz external crystal, 32 kHz RTC oscillator with calibration, and internal 48 MHz HSI48 oscillator with automatic trimming via external sync.
Peripherals include one advanced-control timer (TIM1) for 6-channel PWM, seven general-purpose timers, two I²C interfaces (one with SMBus/PMBus), eight USARTs (three with ISO7816/LIN/IrDA), two SPI/I²S modules, HDMI-CEC, and 24-channel capacitive sensing controller - all mapped to 64-pin LQFP with 5V-tolerant GPIO capability on 69 pins.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 48 MHz max - enables deterministic real-time control loops with <200 ns interrupt latency. |
| Flash / SRAM | 256 KB Flash + 32 KB SRAM with HW parity - supports secure firmware updates and robust data logging in safety-critical nodes. |
| Analog Peripherals | 1×12-bit ADC (16 ch, 1.0 µs), 2×12-bit DAC, 2×comparators - enables closed-loop analog signal conditioning without external converters. |
| Communication | CAN 2.0B, 8×USART, 2×I²C (Fast Mode Plus), 2×SPI/I²S - meets automotive body electronics and industrial fieldbus gateway requirements. |
| I/O Capability | Up to 69 I/Os with 5V tolerance, 19 with independent VDDIO2 supply - simplifies level-shifting in mixed-voltage systems (e.g., 3.3 V MCU + 5 V sensors). |
| Power Management | VDD = 2.0–3.6 V; VDDA = VDD–3.6 V; VBAT for RTC/backup - enables battery-backed operation during main power loss in metering or alarm systems. |
| Debug Interface | Serial Wire Debug (SWD) - provides non-intrusive real-time tracing and flash programming using standard ST-LINK probes. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant ECOPACK®2 construction; rated for industrial temperature range (–40 °C to +85 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VSS, VSSA | Power & ground rails | Dual-supply separation ensures analog accuracy: VDDA must be ≥ VDD and stable within ±2 % for ADC/DAC linearity. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PF0–PF1 | General-purpose I/O | 64 total GPIOs; 69 support 5V tolerance - allows direct interfacing with legacy 5 V logic without external buffers. |
| PA11/PA12 | USB DM/DP (not applicable here) | Not connected in STM32F091RCT6TR - these pins are reserved but unused; no USB PHY present in this variant. |
| PA13/PA14 | SWDIO/SWCLK | Dedicated debug port - requires 10 kΩ pull-up on SWDIO and no series resistor on SWCLK for reliable programming. |
| NRST | Active-low reset | Schmitt-trigger input with internal pull-up; accepts 1.65–5.5 V logic - compatible with open-drain supervisors and manual reset buttons. |
| OSC_IN/OSC_OUT | HSE crystal interface | Supports 4–32 MHz quartz; requires external 12–22 pF load capacitors - critical for CAN bit timing accuracy and RTC calibration stability. |
| VBAT | Backup power supply | Connects to coin cell or supercapacitor; powers RTC and 32 B backup registers during main power failure. |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC unit | Accelerates firmware integrity checks and communication packet validation - reduces CPU load by >95 % vs. software CRC-32. |
| Capacitive sensing controller (TSC) | 24-channel touch-sensing engine with built-in charge transfer and noise filtering - enables robust touchkey/slider implementation without external ICs. |
| Programmable voltage detector (PVD) | Configurable trip points (2.0–2.9 V in 0.1 V steps) - triggers interrupt or reset before brownout, protecting Flash writes and RAM contents. |
| Independent watchdog (IWDG) | Free-running 12-bit counter clocked by 40 kHz LSI - ensures fail-safe recovery even if main clock fails or firmware hangs. |
| HDMI-CEC interface | Dedicated CEC physical layer with header detection wakeup - allows low-power listening for remote commands while in Stop mode (typ. 2.5 µA). |
Applications
| Industrial Motor Control | Smart Sensor Hub |
|---|---|
Use Scenario: Closed-loop speed/position control of BLDC motors in HVAC actuators and conveyor drives. IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, generating 6-channel complementary PWM with dead-time insertion, and sampling current feedback via ADC. Use Value: TIM1 advanced timer enables precise 3-phase PWM synchronization; 12-bit DAC outputs reference voltages for analog comparators in overcurrent protection. | Use Scenario: Multi-sensor aggregation node (temp, humidity, CO₂, motion) with local edge processing and CAN bus reporting. IC Role / Device Role / Timing Role: Central sensor fusion MCU managing I²C sensor reads, running lightweight ML inference, and formatting CAN frames for building management systems. Use Value: 69×5V-tolerant I/Os simplify connection to diverse sensor outputs; RTC with calendar enables time-stamped event logging without external timekeeping. |
| Automotive Body Electronics | Energy Metering Gateway |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting with LIN/CAN interconnect. IC Role / Device Role / Timing Role: LIN master node communicating with slave ECUs and CAN gateway relaying messages to central body controller. Use Value: Three USARTs with LIN auto-baud and wakeup allow concurrent LIN cluster management and CAN bridging; low-power Stop mode extends battery life during vehicle sleep. | Use Scenario: DIN-rail mounted electricity meter concentrator collecting data from sub-meters via RS-485 and forwarding via CAN to SCADA. IC Role / Device Role / Timing Role: Protocol translator and data aggregator with isolated RS-485 (via external transceiver) and CAN 2.0B physical layer. Use Value: Dual CAN interface supports redundant bus architecture; VBAT-backed RTC maintains accurate billing timestamps across power outages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072RBT6 | 128 KB Flash, no CAN, 1×DAC, 64-pin LQFP - lacks CAN 2.0B and second DAC channel. | Suitable for cost-sensitive USB-HID devices or simple sensor nodes where CAN is unnecessary. | Select only if CAN and dual DAC are not required; offers lower BOM cost but reduced peripheral integration. |
| STM32F303RCT6 | ARM Cortex-M4F core, 256 KB Flash, FPU, 2×12-bit ADC, no CAN - adds floating-point math but removes CAN interface. | Better for DSP-intensive tasks (e.g., digital power supply control), but incompatible with CAN-based fieldbus networks. | Choose when computational throughput outweighs fieldbus compatibility; requires redesign of CAN message handling logic. |
Compared with STM32F072RBT6 and STM32F303RCT6, the STM32F091RCT6TR uniquely balances CAN 2.0B connectivity, dual DAC precision, and industrial-grade I/O tolerance - making it optimal for distributed control nodes requiring both analog actuation and robust fieldbus communication.
Availability
STM32F091RCT6TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor hubs, and energy metering gateways requiring stable component supply across multi-year production cycles.
Supply support for STM32F091RCT6TR 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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive chips since 1987.
The STM32F0 series targets cost-sensitive, resource-constrained embedded applications requiring high reliability and broad peripheral integration - especially in industrial automation, appliance control, and IoT edge nodes.
FAQ
Does STM32F091RCT6TR support USB device functionality?
No. This variant lacks USB PHY hardware and dedicated USB pins (PA11/PA12 are unconnected). USB is not implemented in the STM32F091x series; use STM32F072xx or STM32F042xx for USB-enabled designs.
What is the maximum allowed VDDA voltage relative to VDD?
VDDA must be equal to or less than VDD, and both must remain within 2.0–3.6 V. Exceeding VDDA > VDD risks damaging the ADC/DAC analog front-end; ST specifies VDDA = VDD as the recommended configuration for full 12-bit linearity.
Can the internal 48 MHz HSI48 oscillator be used as the system clock source for CAN?
Yes. The HSI48 can feed the CAN prescaler directly, but its ±2 % factory-trimmed accuracy meets ISO 11898-1 Class B (±3 %) requirements only after runtime calibration using an external clock reference - verified in ST Application Note AN4913.
How many I/O pins support independent VDDIO2 supply?
19 pins (PA9–PA15, PB3–PB7, PC6–PC9) are grouped into VDDIO2 domain. This allows interfacing with 1.8 V peripherals while main I/Os operate at 3.3 V - critical for mixed-voltage sensor subsystems without level shifters.
STM32F091RCT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32F0
- Packaging:
- Tape & Reel (TR)
- 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:
- 52
- 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:
STM32F091RCT6TR FAQ
1.How can I place an order for STM32F091RCT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F091RCT6TR 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 STM32F091RCT6TR reliable?
The price and inventory of STM32F091RCT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F091RCT6TR is usually 5 days.
3.What payment methods are accepted for STM32F091RCT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F091RCT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F091RCT6TR?
STM32F091RCT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F091RCT6TR 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 STM32F091RCT6TR?
For technical support, including STM32F091RCT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F091RCT6TR requirements.
6.How does Aetrix verify that STM32F091RCT6TR is sourced from the original manufacturer or authorized distributors?
All STM32F091RCT6TR 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 STM32F091RCT6TR meets industry standards.
7.What is the process for return or replacement of STM32F091RCT6TR?
All STM32F091RCT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F091RCT6TR, 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 STM32F091RCT6TR part is unused and in its original packaging.
Return procedure for STM32F091RCT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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