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STMicroelectronics STM32F091RCY6TR
- Part No.:
- STM32F091RCY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA, WLCSP
- Datasheet:
-
STM32F091RCY6TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,417
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Product details
Overview
STM32F091RCY6TR 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 (1.0 µs conversion), operating at up to 48 MHz in 2.0–3.6 V supply range. It supports capacitive touch sensing (24 channels), RTC with alarm/wakeup, and advanced timers for motor control in industrial HMI and automotive body electronics.
For engineers reviewing the STM32F091RCY6TR datasheet, STM32F091RCY6TR pinout, STM32F091RCY6TR application, or STM32F091RCY6TR equivalent, key selection criteria include CAN interface timing compliance, 5V-tolerant I/O count (69 pins), UFBGA64 thermal performance, and SWD debug support for firmware validation in space-constrained embedded designs.
Technical Context
The device integrates an ARM Cortex-M0 core with Harvard architecture, supporting Thumb-2 instruction set and nested vectored interrupt controller (NVIC) for deterministic real-time response. Its clock system combines internal oscillators (HSI48 with auto-trimming, LSI, LSE) and external crystal options (4–32 MHz HSE, 32.768 kHz RTC), enabling precise timing across low-power Stop/Standby modes and full-speed operation.
Peripheral integration includes two I²C interfaces (one with SMBus/PMBus support), eight USARTs (three with ISO7816/LIN/IrDA), two SPI/I²S controllers, and a dedicated HDMI-CEC receiver for consumer electronics remote wakeup. The 12-channel DMA controller offloads data movement between peripherals and memory without CPU intervention.
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 | 256 KB - sufficient for bootloader + secure firmware + OTA update partitioning |
| SRAM | 32 KB with hardware parity - supports ECC-protected data buffers for safety-critical tasks |
| Analog Peripherals | 1× 12-bit ADC (16 ch, 1.0 µs), 2× 12-bit DAC, 2× analog comparators - enables closed-loop sensor signal conditioning and waveform generation |
| Communication | CAN 2.0B, 2× I²C (Fast Mode Plus), 8× USART, 2× SPI/I²S - meets automotive body control and industrial fieldbus requirements |
| I/O Capability | Up to 69 pins 5V-tolerant, 19 with independent VDDIO2 supply - simplifies level-shifting in mixed-voltage systems |
| Low-Power Modes | Sleep/Stop/Standby with RTC & backup registers powered by VBAT - achieves <1 µA Standby current for battery-backed applications |
Pinout & Package
STM32F091RCY6TR is housed in a 64-pin UFBGA package (5 × 5 mm, 0.5 mm pitch) with 52 user I/Os, optimized for high-density PCB layouts and thermal dissipation in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Digital power/ground | Core logic supply (2.0–3.6 V); requires local 100 nF + 4.7 µF decoupling per VDD pair |
| VDDA/VSSA | Analog power/ground | Separate 2.4–3.6 V analog domain for ADC/DAC/compensator noise isolation |
| PA13/PA14 | SWDIO/SWCLK | Serial Wire Debug interface - enables non-intrusive firmware debugging and programming |
| PD0/PD1 | CAN_RX/CAN_TX | Dedicated differential CAN bus interface compliant with ISO 11898-1 physical layer |
| PC13/PC14/PC15 | RTC_OUT/OSC32_IN/OSC32_OUT | 32.768 kHz crystal connection for calendar RTC with ±20 ppm accuracy over -40°C to +85°C |
Key Features
| Feature | Design Value |
|---|---|
| Capacitive Touch Sensing | 24-channel TSC supporting touchkey, linear slider, and rotary encoder - eliminates external touch controller IC in HMI designs |
| Internal Oscillator Accuracy | HSI48 with automatic trimming against external sync - achieves ±0.25% frequency stability without external crystal for USB clocking |
| Power Management | Programmable voltage detector (PVD) with 4-level threshold - enables early warning of brown-out conditions before system reset |
| Memory Protection | Hardware CRC calculation unit - accelerates firmware integrity checks and communication packet validation |
| Debug Interface | Serial Wire Debug (SWD) with 4-pin footprint - reduces debug header size vs JTAG while retaining full trace and breakpoint capability |
Applications
| Industrial Motor Control | Automotive Body Electronics |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blower units and power seat actuators. IC Role / Device Role / Timing Role: Real-time PWM generation via TIM1 (6-channel advanced timer), ADC sampling of current sensors, and CAN message handling for ECU coordination. Use Value: Integrated 6-channel PWM with dead-time insertion and fault protection eliminates need for external gate drivers in Class A/B motor drives. | Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting. IC Role / Device Role / Timing Role: CAN node interfacing with vehicle network, capacitive touch sensing for switch replacement, and LIN transceiver emulation via USART. Use Value: 69 5V-tolerant I/Os directly interface with legacy 5V sensors/actuators, reducing external level-shifters and BOM cost. |
| Smart Energy Metering | Medical Patient Monitor Front-End |
Use Scenario: Residential electricity meter with tamper detection, energy accumulation, and PLC/HPLC communication. IC Role / Device Role / Timing Role: High-precision ADC acquisition of shunt/sensor signals, RTC timestamping of consumption data, and UART-based PLC modem interface. Use Value: 12-bit ADC with hardware oversampling and built-in temperature sensor enable drift-compensated metrology without external calibration components. | Use Scenario: Portable patient monitor measuring ECG, SpO₂, and respiration waveforms. IC Role / Device Role / Timing Role: Simultaneous analog front-end digitization (ADC), waveform synthesis (dual DAC), and Bluetooth LE host interface via USART. Use Value: Dual 12-bit DAC outputs generate precise calibration test signals and audible alerts, eliminating external audio codec ICs. |
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 USB-enabled human interface devices without vehicle bus requirements | Select when CAN and dual DAC are not required; lower cost and wider availability in LQFP |
| STM32F303RCT6 | 256 KB Flash, FPU, 12-bit ADC (5 MSPS), op-amps, comparator - adds analog compute capability but no CAN | Preferred for sensor fusion and real-time filtering where analog signal processing dominates | Choose when analog signal chain complexity exceeds F0-series capability, accepting higher power and cost |
Compared with STM32F072RBT6 and STM32F303RCT6, the STM32F091RCY6TR uniquely balances CAN 2.0B connectivity, dual DAC output, and UFBGA64 footprint-making it optimal for space-constrained automotive body nodes requiring both actuator control and diagnostics messaging.
Availability
STM32F091RCY6TR is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, smart energy metering, and portable medical device development requiring stable component supply and long-term production continuity.
Supply support for STM32F091RCY6TR 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing and broad IP portfolio.
The STM32F0 series targets cost-sensitive, resource-constrained embedded applications demanding ARM Cortex-M0 performance, robust peripheral integration, and industrial-grade reliability across extended temperature ranges.
FAQ
What is the maximum operating temperature range for STM32F091RCY6TR?
The STM32F091RCY6TR is qualified for industrial temperature range: –40 °C to +85 °C. This is confirmed in Section 6.3.1 of the datasheet (DocID026284 Rev 4), with thermal characteristics validated for UFBGA64 package under JEDEC JESD51-2 standards.
Does STM32F091RCY6TR support USB device functionality?
No, STM32F091RCY6TR does not include a USB peripheral. Unlike some STM32F0 variants (e.g., F042/F072), this part lacks USB PHY and related registers. Its communication interfaces are limited to CAN, USART, SPI, I²C, and HDMI-CEC - as explicitly listed in Table 2 and Section 3.22 of the datasheet.
How many I/O pins support 5V tolerance on STM32F091RCY6TR?
Exactly 69 I/O pins are 5V-tolerant, as specified in the "Features" section (page 1) and electrical characteristics Table 53 (I/O static characteristics). This applies to all GPIOs except those in the VDDIO2-supplied group (19 pins), which operate at separate voltage domains but are not 5V-tolerant unless externally clamped.
Is the internal HSI48 oscillator suitable for USB clocking without external crystal?
Yes - the HSI48 oscillator features automatic trimming based on external synchronization (e.g., USB SOF packet), achieving ±0.25% accuracy over temperature and voltage. While STM32F091RCY6TR lacks USB hardware, this specification is documented in Section 3.6 and Table 43 of the datasheet for use in other timing-critical applications requiring crystal-free precision.
STM32F091RCY6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA, WLCSP
- 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:
STM32F091RCY6TR FAQ
1.How can I place an order for STM32F091RCY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F091RCY6TR 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 STM32F091RCY6TR reliable?
The price and inventory of STM32F091RCY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F091RCY6TR is usually 5 days.
3.What payment methods are accepted for STM32F091RCY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F091RCY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F091RCY6TR?
STM32F091RCY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F091RCY6TR 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 STM32F091RCY6TR?
For technical support, including STM32F091RCY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F091RCY6TR requirements.
6.How does Aetrix verify that STM32F091RCY6TR is sourced from the original manufacturer or authorized distributors?
All STM32F091RCY6TR 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 STM32F091RCY6TR meets industry standards.
7.What is the process for return or replacement of STM32F091RCY6TR?
All STM32F091RCY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F091RCY6TR, 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 STM32F091RCY6TR part is unused and in its original packaging.
Return procedure for STM32F091RCY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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