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STMicroelectronics STM32F091RBT6
- Part No.:
- STM32F091RBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F091RBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,170
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Product details
Overview
STM32F091RBT6 from STMicroelectronics is a 32-bit ARM Cortex-M0 microcontroller in LQFP64 package, featuring 128 KB Flash, 32 KB SRAM with hardware parity, integrated CAN 2.0B interface, dual 12-bit DAC, and 12-bit ADC with 16 channels. It operates from 2.0–3.6 V and supports industrial motor control, smart sensor nodes, and CAN-based automotive body electronics.
For engineers reviewing the STM32F091RBT6 datasheet, STM32F091RBT6 pinout, STM32F091RBT6 application, or STM32F091RBT6 equivalent, key selection criteria include CAN interface integration, 5V-tolerant I/O count (up to 69), RTC with calibration, SWD debug support, and 48 MHz max CPU frequency under 3.6 V supply.
Technical Context
This MCU implements an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and nested vectored interrupt controller (NVIC) for deterministic real-time response. It integrates a 12-channel DMA controller, CRC calculation unit, and programmable voltage detector (PVD) for supply monitoring.
Clock system includes dual oscillators: 4–32 MHz HSE for precision timing and internal 48 MHz HSI48 with automatic trimming via external synchronization-enabling USB-class accuracy without crystal. Power management supports Sleep, Stop, and Standby modes with RTC and backup registers retained on VBAT.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M0, 48 MHz max - enables deterministic real-time control with <100 ns interrupt latency |
| Flash Memory | 128 KB - sufficient for bootloader + dual-bank firmware updates and secure OTA patching |
| SRAM | 32 KB with HW parity - supports safety-critical data buffers and ECC-free error detection |
| Analog Peripherals | 1×12-bit ADC (16 ch, 1 µs), 2×12-bit DAC, 2×comparators - enables closed-loop analog signal generation and sensing |
| Communication | CAN 2.0B, 2×I²C (Fast Mode Plus), 8×USART (3 with ISO7816), 2×SPI/I²S - full vehicle network & industrial fieldbus readiness |
| I/O Capability | Up to 69 pins 5V-tolerant, 19 with independent VDDIO2 supply - simplifies mixed-voltage board design and legacy interface bridging |
| Low-Power Modes | Stop mode current ≤1.3 µA @ 3.3 V - extends battery life in always-on sensor endpoints with periodic wakeup |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant ECOPACK®2 packaging.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Digital power/ground | Primary 2.0–3.6 V supply domain; decoupling required per STM32 layout guidelines |
| VDDA, VSSA | Analog power/ground | Separate 2.4–3.6 V analog domain; mandatory isolation from digital noise for ADC/DAC accuracy |
| NRST | Active-low reset | Asynchronous reset input with internal pull-up; supports external debounced pushbutton or supervisor IC |
| PA13/PA14 | SWDIO/SWCLK | Serial Wire Debug interface - enables non-intrusive debugging and flash programming without JTAG pins |
| PD0/PD1 | CAN_RX/CAN_TX | Dedicated differential CAN transceiver interface - requires external CAN PHY for bus connection |
| PA0 | ADC1_IN0 / TSC_G1_IO1 | Shared analog input and touch-sensing channel - supports single-pin proximity or linear slider implementation |
Key Features
| Feature | Design Value |
|---|---|
| Hardware CRC unit | Accelerates firmware integrity checks and communication frame validation without CPU overhead |
| Capacitive sensing controller (TSC) | 24-channel touchkey/rotary support - eliminates external touch ICs in HMI designs |
| HDMI CEC wakeup | Enables low-power standby with remote-triggered wake via consumer IR protocol header detection |
| Independent VDDIO2 supply | Allows 19 I/Os to operate at different voltage than VDD - critical for interfacing with 1.8 V logic or legacy 5 V peripherals |
| RTC with calibration | ±1 ppm accuracy over temperature via 32 kHz LSE trimming - meets timekeeping requirements for metering and logging |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
Use Scenario: Brushless DC motor commutation with current sensing and PWM timing. IC Role / Device Role / Timing Role: Real-time control unit managing six-step PWM outputs, ADC sampling of phase currents, and CAN feedback reporting. Use Value: Integrated advanced timer (TIM1) delivers precise 6-channel complementary PWM with dead-time insertion, reducing external gate driver complexity. | Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting via LIN/CAN. IC Role / Device Role / Timing Role: Central body controller handling multi-protocol communication, capacitive touch buttons, and power sequencing. Use Value: Dual USARTs with LIN physical layer support and 69 5V-tolerant I/Os enable direct connection to legacy switches and actuators without level shifters. |
| Smart Energy Metering | Medical Sensor Node |
Use Scenario: DIN-rail mounted electricity meter with tamper detection and pulse output. IC Role / Device Role / Timing Role: Data acquisition and secure reporting node performing ADC sampling, RTC timestamping, and isolated RS-485 communication. Use Value: Hardware CRC and SRAM parity ensure data integrity across 10+ year field deployment; VBAT-backed RTC maintains billing timestamps during mains failure. | Use Scenario: Portable ECG patch with lead-off detection and Bluetooth LE gateway interface. IC Role / Device Role / Timing Role: Analog front-end conditioner and low-power host managing ADC oversampling, DAC reference calibration, and sleep/wakeup scheduling. Use Value: Ultra-low Stop mode current (1.3 µA) and fast wakeup (<5 µs) extend coin-cell battery life beyond 12 months with daily 30-second ECG capture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072RBT6 | No CAN interface; 16 KB SRAM; same LQFP64 package and core | Not suitable for CAN-based networks; adequate for USB CDC or SPI-based sensor hubs | Select when CAN is unnecessary and cost reduction is prioritized over fieldbus compatibility |
| STM32F303RBT6 | Cortex-M4F core; FPU; 128 KB Flash; no CAN but includes op-amps and comparators | Better for analog-intensive tasks (e.g., active filter control); lacks native CAN for vehicle integration | Choose when floating-point math or embedded analog signal processing outweighs CAN requirement |
Compared with STM32F072RBT6, the STM32F091RBT6 adds essential CAN 2.0B and 16 KB more SRAM for message buffering; versus STM32F303RBT6, it trades FPU and op-amps for guaranteed CAN compliance and lower dynamic power in deterministic control loops.
Availability
STM32F091RBT6 is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart energy metering, and medical sensor node applications requiring stable component supply across extended product lifecycles.
Supply support for STM32F091RBT6 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, resource-constrained embedded applications requiring robust peripheral integration, low-power operation, and industrial-grade reliability - with the F091 variant optimized for CAN-enabled edge nodes.
FAQ
What is the maximum operating frequency and voltage range for STM32F091RBT6?
The STM32F091RBT6 operates at up to 48 MHz when supplied with 2.0–3.6 V on VDD. Its internal 48 MHz HSI48 oscillator is factory-trimmed and supports automatic calibration using external clock synchronization, ensuring stable timing without external crystal dependency for many applications.
Does STM32F091RBT6 support USB connectivity?
No, the STM32F091RBT6 does not include a USB peripheral. It features CAN 2.0B, multiple USARTs (three with ISO7816), I²C, SPI/I²S, and HDMI CEC interfaces-but no USB device or host controller. For USB functionality, consider STM32F072 or STM32F303 series variants.
How many 5V-tolerant I/O pins does STM32F091RBT6 have in LQFP64 package?
In the LQFP64 package, STM32F091RBT6 provides up to 51 5V-tolerant I/O pins. This count is derived from the device's total of 69 5V-tolerant GPIOs across all packages, with pin mapping confirmed in Section 4 (Pinouts and pin descriptions) of the official datasheet DocID026284 Rev 4.
Is there hardware support for cryptographic operations on STM32F091RBT6?
No, the STM32F091RBT6 does not include dedicated cryptographic accelerators (e.g., AES, SHA, PKA). It relies on software libraries for encryption tasks. For hardware crypto, ST's STM32L4, STM32G0, or STM32H7 series provide TRNG, AES-128/256, and HASH modules - the F091 focuses on real-time control and analog integration instead.
STM32F091RBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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:
- 52
- 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:
STM32F091RBT6 FAQ
1.How can I place an order for STM32F091RBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F091RBT6 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 STM32F091RBT6 reliable?
The price and inventory of STM32F091RBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F091RBT6 is usually 5 days.
3.What payment methods are accepted for STM32F091RBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F091RBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F091RBT6?
STM32F091RBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F091RBT6 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 STM32F091RBT6?
For technical support, including STM32F091RBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F091RBT6 requirements.
6.How does Aetrix verify that STM32F091RBT6 is sourced from the original manufacturer or authorized distributors?
All STM32F091RBT6 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 STM32F091RBT6 meets industry standards.
7.What is the process for return or replacement of STM32F091RBT6?
All STM32F091RBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F091RBT6, 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 STM32F091RBT6 part is unused and in its original packaging.
Return procedure for STM32F091RBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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