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STMicroelectronics STM32G491VET3
- Part No.:
- STM32G491VET3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32G491VET3.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,597
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Product details
Overview
STM32G491VET3 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 (96 KB + 16 KB CCM), and integrated analog peripherals including three 16-bit ADCs, four 12-bit DACs, four rail-to-rail comparators, and four operational amplifiers. It supports FDCAN FD, USB Full-Speed, UCPD, and hardware math accelerators (CORDIC, FMAC) for motor control and signal processing in industrial automation and power conversion systems.
For engineers reviewing the STM32G491VET3 datasheet, STM32G491VET3 pinout, STM32G491VET3 application, or STM32G491VET3 equivalent, key selection criteria include its 170 MHz Cortex-M4+FPU core, dual-bank Flash with PCROP, 86 fast I/Os (5 V tolerant), rich analog front-end, and support for FDCAN flexible data-rate communication in real-time embedded control designs.
Technical Context
The STM32G491VET3 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 CORDIC and FMAC units offload trigonometric and filtering computations from the CPU.
It integrates dual-voltage domain power management supporting multiple low-power modes (Stop 0/1, Standby, Shutdown), programmable voltage detector (PVD), and VBAT-backed RTC with alarm and periodic wakeup-enabling robust operation in battery-backed industrial sensing and metering applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, enabling real-time floating-point control loops and audio/signal processing. |
| Max Clock Frequency | 170 MHz (213 DMIPS), sustained via ART Accelerator for deterministic flash-based code execution. |
| Memory | 512 KB Flash with ECC and PCROP; 96 KB SRAM + 16 KB CCM-SRAM with parity, supporting safety-critical data integrity. |
| Analog Peripherals | 3 × 16-bit ADCs (0.25 µs, up to 36 channels); 4 × 12-bit DACs (2 buffered external @ 1 MSPS, 2 unbuffered internal @ 15 MSPS). |
| Timers & Control | 15 timers including 3 advanced motor-control timers (TIM1/TIM8/TIM20) with dead-time generation and emergency stop for 3-phase inverter drives. |
| Communication | 2 × FDCAN FD controllers; 5 × USART/UART (LIN/IrDA/ISO7816); 3 × SPI; 3 × I²C Fast Mode Plus; USB 2.0 FS with LPM/BCD; UCPD for USB Type-C PD negotiation. |
| Math Acceleration | CORDIC for sin/cos/tan/atan/sqrt/log/exp; FMAC for FIR/IIR filter acceleration-reducing CPU load in motor control and sensor fusion. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 64 pins, RoHS-compliant and ECOPACK2 certified. Pin functions validated per STMicroelectronics DS13122 Rev 4, Section 4.5 (LQFP64 pinout description) and Table 12 (pin definition).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply | 1.71–3.6 V single-supply operation; separate analog domain enables clean ADC/DAC reference. |
| VSS, VSSA | Digital & analog ground | Independent grounding reduces noise coupling between digital switching and precision analog circuits. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | Up to 86 fast I/Os; most support external interrupts and 5 V tolerance-simplifies level-shifting in mixed-voltage systems. |
| PA11/PA12 | USB D+/D− | Integrated USB 2.0 Full-Speed transceiver with internal pull-ups; no external PHY required. |
| PD0/PD1 | FDCAN1 TX/RX | Dedicated differential CAN FD interface supporting up to 5 Mbps data phase-suitable for automotive body control and industrial fieldbus. |
| PC13/PC14/PC15 | RTC oscillator inputs | Support external 32.768 kHz crystal for calendar RTC with alarm and wake-up from Stop/Standby modes. |
Key Features
| Feature | Design Value |
|---|---|
| Adaptive Real-Time Accelerator (ART) | Enables 0-wait-state execution from Flash at 170 MHz-eliminates cache misses in deterministic real-time firmware. |
| Hardware Math Accelerators | CORDIC + FMAC reduce CPU cycles for motor control algorithms (FOC, SVM) and digital filtering by >70% vs. software-only implementation. |
| Advanced Analog Integration | Four op-amps with PGA mode and all terminals accessible-enables configurable gain stages for sensor signal conditioning without external components. |
| Secure Memory Architecture | Proprietary Code Readout Protection (PCROP) + securable memory area + 1 KB OTP-supports firmware IP protection and secure boot key storage. |
| FDCAN Flexible Data-Rate | Two independent FDCAN controllers compliant with ISO 11898-1:2015-enables high-bandwidth diagnostics and control messaging in automotive and industrial networks. |
Applications
| Industrial Motor Drives | Smart Energy Meters |
|---|---|
Use Scenario: Closed-loop field-oriented control (FOC) of 3-phase BLDC/PMSM motors in HVAC compressors and pump inverters. IC Role / Device Role / Timing Role: Main system controller executing PWM generation, current sensing (via 3× ADCs), position estimation (CORDIC), and fault handling (emergency stop timers). Use Value: Integrated advanced timers with dead-time insertion and hardware FMAC accelerate FOC loop execution to <1 µs-enabling >20 kHz switching frequency and smoother torque response. | Use Scenario: Polyphase electricity metering with harmonic analysis, tamper detection, and secure data logging. IC Role / Device Role / Timing Role: System-on-chip managing metrology ADC sampling, RTC timestamping, secure flash logging, and HPLC/RF communication stack. Use Value: Dual-bank Flash with PCROP ensures firmware update atomicity and prevents rollback attacks; VREFBUF provides stable 2.048 V reference for metrology ADC accuracy ±0.1%. |
| USB-C Power Delivery Systems | Programmable Logic Controllers (PLCs) |
Use Scenario: USB Type-C port controller in industrial docking stations requiring bidirectional power negotiation (up to 100 W) and data tunneling. IC Role / Device Role / Timing Role: UCPD peripheral handles BMC physical layer, PD protocol stack, and VBUS monitoring-coordinated with FDCAN for system-level power orchestration. Use Value: Dedicated UCPD block offloads full USB PD 3.0 negotiation from CPU; integrated comparators monitor VBUS with <1 µs response-critical for overvoltage protection compliance. | Use Scenario: Compact modular PLC base unit with analog I/O expansion, real-time motion control, and EtherCAT slave interface. IC Role / Device Role / Timing Role: Central controller running IEC 61131-3 runtime, managing 16-bit ADC inputs, PWM outputs, and time-triggered CAN/FDCAN messaging. Use Value: 86 fast I/Os with interrupt mapping and 5 V tolerance simplify direct connection to industrial sensors/actuators; Stop 0 mode draws only 2.5 µA-enabling battery-backed configuration retention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-performance mixed-signal MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G474RET6 | Same G4 series, but 512 KB Flash, 128 KB SRAM, no UCPD, no CORDIC/FMAC, fewer timers (12 vs. 15), no FDCAN FD (only classic CAN). | Suitable for cost-sensitive motor control where USB-C PD and advanced math acceleration are not required. | Select when UCPD, CORDIC, or FDCAN FD are unnecessary-reduces BOM cost and simplifies layout. |
| STM32H743VIT6 | Higher-tier Cortex-M7 @ 480 MHz, 2 MB Flash, 1 MB RAM, dual-core option, no CORDIC/FMAC, no UCPD, different peripheral set (e.g., no FMAC, no VREFBUF). | Better for AI inference or high-throughput data processing; less optimal for analog-rich, math-accelerated real-time control. | Choose for applications needing raw CPU throughput or large memory footprint-not for analog-intensive, low-latency control where G491 excels. |
Compared with STM32G474RET6, the STM32G491VET3 adds UCPD, CORDIC, FMAC, and FDCAN FD-making it superior for USB-C PD systems and advanced motor control. Versus STM32H743VIT6, it trades peak CPU speed for better analog integration, lower power, and dedicated math hardware-ideal for deterministic edge control rather than compute-heavy tasks.
Availability
STM32G491VET3 is available at Aetrix Electronics and suitable for industrial motor drives, smart energy meters, USB-C power delivery systems, and programmable logic controllers requiring stable component supply across multi-year production cycles.
Supply support for STM32G491VET3 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 STM32G4 series targets high-efficiency, analog-rich embedded control applications-combining Cortex-M4 performance with hardware math acceleration, precision analog, and functional safety features for industrial automation and digital power.
FAQ
What is the maximum operating temperature range for STM32G491VET3?
The STM32G491VET3 is rated for industrial temperature range: –40 °C to +85 °C ambient, validated per DS13122 Rev 4 Section 5.3.1. This applies to all LQFP64 variants and ensures reliable operation in factory automation, motor drives, and outdoor metering environments without derating.
Does STM32G491VET3 support hardware encryption or secure boot?
While STM32G491VET3 lacks a dedicated cryptographic accelerator (AES/SHA), it supports secure boot via its proprietary Code Readout Protection (PCROP), securable memory area, and 96-bit unique ID. Secure firmware updates can be implemented using external secure elements or software-based signature verification leveraging its Flash protection and trusted execution environment.
Can the internal op-amps be used in instrumentation amplifier configurations?
Yes-the four operational amplifiers have all terminals accessible and support programmable gain amplifier (PGA) mode. With external resistors, they can be configured as 3-op-amp instrumentation amplifiers; the datasheet confirms input offset voltage <1 mV and CMRR >80 dB, making them suitable for precision sensor signal conditioning in weigh scales and industrial transmitters.
Is the STM32G491VET3 pin-compatible with other STM32G4-series MCUs in LQFP64?
No-STM32G491VET3 uses the LQFP64 (5W) package variant defined in DS13122 Section 6.6, but pin compatibility is not guaranteed across G4 sub-families. For example, STM32G431KBT6 (UFQFPN32) and STM32G474RET6 (LQFP64) share some peripheral mappings but differ in ADC channel count, timer features, and UCPD presence-requiring PCB redesign for migration.
STM32G491VET3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-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:
- 86
- Program Memory Size:
- 512KB (512K 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 36x12b SAR; D/A 4x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32G491VET3 FAQ
1.How can I place an order for STM32G491VET3 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G491VET3 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 STM32G491VET3 reliable?
The price and inventory of STM32G491VET3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G491VET3 is usually 5 days.
3.What payment methods are accepted for STM32G491VET3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G491VET3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G491VET3?
STM32G491VET3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G491VET3 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 STM32G491VET3?
For technical support, including STM32G491VET3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G491VET3 requirements.
6.How does Aetrix verify that STM32G491VET3 is sourced from the original manufacturer or authorized distributors?
All STM32G491VET3 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 STM32G491VET3 meets industry standards.
7.What is the process for return or replacement of STM32G491VET3?
All STM32G491VET3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G491VET3, 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 STM32G491VET3 part is unused and in its original packaging.
Return procedure for STM32G491VET3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32G491VET3 Tags
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