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STMicroelectronics STM32G491CCT6
- Part No.:
- STM32G491CCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32G491CCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,827
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Product details
Overview
STM32G491CCT6 from STMicroelectronics is an Arm® Cortex®-M4 32-bit microcontroller with FPU, operating up to 170 MHz (213 DMIPS), featuring 512 KB Flash with ECC, 112 KB SRAM (including 16 KB CCM-SRAM with parity), and integrated analog peripherals including three 16-bit ADCs, four 12-bit DACs, four rail-to-rail comparators, and four operational amplifiers - deployed in motor control, digital power conversion, and industrial sensing systems.
For engineers reviewing the STM32G491CCT6 datasheet, STM32G491CCT6 pinout, STM32G491CCT6 application, or STM32G491CCT6 equivalent, key selection criteria include its dual FDCAN 2.0B/FD support, CORDIC/FMAC math accelerators, UCPD USB Type-C™ controller, 5 V-tolerant GPIOs, and LQFP48 package compatibility with legacy STM32G4x1 footprint layouts.
Technical Context
This MCU implements a tightly coupled interconnect matrix enabling concurrent access to flash, SRAM, and peripherals without bus contention. Its ART Accelerator delivers zero-wait-state execution from Flash at 170 MHz, while the dual-bank Flash architecture supports secure firmware updates with PCROP and securable memory regions.
The analog subsystem integrates independent high-speed signal chains: three synchronized 16-bit ADCs (0.25 µs conversion) feed into the FMAC for real-time filtering, while four op-amps operate in programmable-gain amplifier (PGA) mode with full terminal access - enabling direct sensor interface and closed-loop control without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, enabling floating-point math and signal processing in real time |
| Max Clock Frequency | 170 MHz (213 DMIPS), sustained via ART Accelerator for deterministic timing-critical code |
| Flash Memory | 512 KB with ECC, PCROP, and 1 KB OTP - supports secure boot and field firmware updates |
| SRAM | 112 KB total: 96 KB general-purpose + 16 KB CCM-SRAM on instruction/data bus with parity |
| Analog Peripherals | 3× 16-bit ADCs (36-channel, hardware oversampling), 4× 12-bit DACs (2 buffered/1 MSPS, 2 unbuffered/15 MSPS) |
| Communication | 2× FDCAN FD, 5× USART/UART (incl. LIN/IrDA), 3× I²C (Fast Mode Plus), USB 2.0 FS + UCPD |
| Math Acceleration | CORDIC (trig/log/exp) and FMAC (FIR/IIR filtering) offload CPU for motor control and power conversion |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch), RoHS-compliant ECOPACK2 package with exposed thermal pad; 48-pin layout optimized for compact motor drive and digital power designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 1.71–3.6 V core/analog supply rails with dedicated decoupling pads |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2 | General-purpose I/O | Up to 42 5 V-tolerant pins mappable to EXTI, timers, ADC/DAC, and communication peripherals |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with open-drain reset supervisors |
| BOOT0 | Boot mode selection | Configures boot source (system memory, embedded flash, or SRAM) at power-on |
| OSC_IN / OSC_OUT | External crystal oscillator interface | Supports 4–48 MHz crystals for precise clock generation; optional bypass for external clock input |
| VBAT | Backup power supply | Supplies RTC and backup registers during main power loss; accepts 1.65–3.6 V |
Key Features
| Feature | Design Value |
|---|---|
| FDCAN FD Interface | Two fully independent controllers supporting ISO 11898-1:2015 with flexible data-rate up to 5 Mbit/s for automotive and industrial networking |
| UCPD Controller | Integrated USB Type-C™ and Power Delivery PHY + protocol engine - eliminates need for external UCPD IC in USB-C power sink/source designs |
| CORDIC + FMAC | Hardware-accelerated trigonometric and filter computations reduce CPU load by >70% in PMSM FOC and digital PLL implementations |
| Op-Amp PGA Mode | All four op-amps support programmable gain (1–20×) with accessible inverting/non-inverting inputs and output - enables direct current/voltage sensing without external resistors |
| VREFBUF Output | Three precision reference voltages (2.048 V, 2.5 V, 2.9 V) with ±0.5% accuracy - simplifies ADC/DAC calibration and sensor excitation |
Applications
| Motor Control System | Digital Power Supply |
|---|---|
Use Scenario: Field-oriented control (FOC) of 3-phase BLDC/PMSM motors in HVAC blowers and industrial pumps. IC Role / Device Role / Timing Role: Real-time computation engine executing FOC loops at 20 kHz using CORDIC/FMAC, driving 3-phase gate drivers via advanced timers with dead-time insertion. Use Value: Enables single-chip motor control with <1 µs interrupt latency and synchronized ADC sampling across all three phases. | Use Scenario: Isolated AC/DC and DC/DC converters with adaptive voltage regulation and fault protection. IC Role / Device Role / Timing Role: Digital controller managing PWM generation, current/voltage loop regulation, and communication via FDCAN to master system. Use Value: Integrates isolated feedback interface (via op-amp/ADC), fast DAC-based reference adjustment, and UCPD for USB-C PD negotiation in compact form factor. |
| Industrial Sensor Hub | USB-C Power Sink |
Use Scenario: Multi-sensor node aggregating temperature, pressure, and current measurements in factory automation. IC Role / Device Role / Timing Role: Signal conditioner and aggregator with simultaneous 16-bit ADC sampling, op-amp front-end gain control, and timestamped data logging. Use Value: Eliminates external signal chain components; achieves ±0.1% measurement accuracy with internal VREFBUF and hardware oversampling. | Use Scenario: Portable medical device requiring USB-C power negotiation and battery charging management. IC Role / Device Role / Timing Role: USB-C port controller handling PD contract negotiation, VBUS monitoring, and role swap coordination. Use Value: Native UCPD peripheral reduces BOM count by one IC and supports USB PD 3.0 with programmable policy engine. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G474RET6 | Same core and peripherals but 512 KB Flash reduced to 512 KB (same), 96 KB SRAM (vs. 112 KB), no UCPD controller | Lacks native USB-C PD support; requires external UCPD IC for USB-C power negotiation | Select when USB-C PD is not required and cost optimization is prioritized over integration |
| STM32H743VIT6 | Higher-performance Cortex-M7 (480 MHz), 2 MB Flash, 1 MB RAM, but larger LQFP100 package and no CORDIC/FMAC | Better raw compute throughput but lacks dedicated math accelerators for motor/power control; higher power and cost | Select for complex GUI or AI-edge inference where M7 performance outweighs analog integration needs |
Compared with STM32G474RET6, the STM32G491CCT6 adds UCPD and 16 KB extra SRAM for real-time control buffers; versus STM32H743VIT6, it trades peak CPU speed for lower power, smaller footprint, and hardware math acceleration tailored to motor and power conversion.
Availability
STM32G491CCT6 is available at Aetrix Electronics and suitable for motor control systems, digital power supplies, industrial sensor hubs, and USB-C power sink devices requiring stable component supply across multi-year production cycles.
Supply support for STM32G491CCT6 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 products for industrial, automotive, and consumer markets.
The STM32G4 series targets high-efficiency digital power conversion and real-time motor control, integrating math accelerators, rich analog front-ends, and USB-C PD to replace multi-chip solutions in space-constrained applications.
FAQ
What is the maximum operating temperature range for STM32G491CCT6?
The STM32G491CCT6 is qualified for industrial operation from –40 °C to +85 °C ambient temperature, with junction temperature limits defined per ST's thermal characteristics table (DS13122 Rev 4, Section 6.10). Thermal resistance (θJA) is 44.5 °C/W in LQFP48 package with standard 2-layer PCB layout and 1 cm² copper pour.
Does STM32G491CCT6 support hardware encryption or secure boot?
Yes - it includes proprietary code readout protection (PCROP), securable memory areas, and a 96-bit unique ID. While it lacks a dedicated cryptographic accelerator (e.g., AES engine), secure boot is implemented via immutable bootloader in system memory and configurable Flash lock bits, validated per ST's AN5270 application note.
Can the four operational amplifiers be used in instrumentation amplifier configuration?
No - the op-amps are standalone units with non-inverting/inverting inputs and output accessible externally, but no internal resistor network or dedicated instrumentation amplifier topology. However, two op-amps can be externally configured as an IA using precision external resistors, leveraging their rail-to-rail input/output and PGA mode for gain setting.
Is the CORDIC unit accessible via CMSIS-DSP or only through direct register access?
The CORDIC is accessed exclusively via memory-mapped registers (CORDIC_CR, CORDIC_SR, etc.) per RM0440 Reference Manual. ST provides HAL drivers (HAL_CORDIC_* functions) and example projects, but no CMSIS-DSP wrapper - users must configure start/stop, data format, and function mode (sin/cos/atan/mag) directly.
STM32G491CCT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32G4
- Packaging:
- Bulk
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit
- Speed:
- 170MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, QSPI, SAI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 112K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 18x12b SAR; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G491CCT6 FAQ
1.How can I place an order for STM32G491CCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G491CCT6 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 STM32G491CCT6 reliable?
The price and inventory of STM32G491CCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491CCT6 is usually 5 days.
3.What payment methods are accepted for STM32G491CCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491CCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G491CCT6?
STM32G491CCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G491CCT6 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 STM32G491CCT6?
For technical support, including STM32G491CCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491CCT6 requirements.
6.How does Aetrix verify that STM32G491CCT6 is sourced from the original manufacturer or authorized distributors?
All STM32G491CCT6 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 STM32G491CCT6 meets industry standards.
7.What is the process for return or replacement of STM32G491CCT6?
All STM32G491CCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491CCT6, 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 STM32G491CCT6 part is unused and in its original packaging.
Return procedure for STM32G491CCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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