STM32G474RET6 - 170MHz Arm Cortex-M4 MCU | STMicroelectronics
MPN: STM32G474RET6 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.5 | $8.50 |
| 10 | $7.65 | $76.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.12 | $3,060.00 |
| 1,000 | $5.44 | $5,440.00 |
Drop-in alternatives for STM32G474RET6 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
STM32G474RCT6
β Drop-Inπ Reference alternative (not in catalog)
STM32G474RET6TR
β Drop-Inπ Reference alternative (not in catalog)
STM32G474RET6Q
β Drop-Inπ Reference alternative (not in catalog)
STM32G474RET6 Maximum Ratings & Electrical Characteristics
| Core | Arm Cortex-M4 with FPU |
| Maximum Clock Frequency | 170 MHz |
| Flash Memory | 512 KB |
| SRAM | 128 KB |
| Operating Voltage | 1.71 V to 3.6 V |
| ADC Resolution | 12-bit |
| ADC Sample Rate | 5 MSPS |
| DAC Resolution | 12-bit |
| High-Resolution Timer | 184 ps PWM resolution |
| Communication Interfaces | SPI, I2C, USART, CAN FD, USB |
| GPIO Pins | 51 |
| Package | LQFP-64 |
| Operating Temperature | -40C to +85C |
| RoHS Status | Compliant |
| DSP Instructions | Yes |
STM32G474RET6 Pin Configuration
| Pin 1 | VBAT β Battery backup supply |
| Pin 2 | PC13 β GPIO / RTC output |
| Pin 3 | PC14 β GPIO / OSC32_IN |
| Pin 4 | PC15 β GPIO / OSC32_OUT |
| Pin 5 | PF0 β GPIO / OSC_IN |
| Pin 6 | PF1 β GPIO / OSC_OUT |
| Pin 7 | NRST β Reset (active low) |
| Pin 8 | VDD β Digital power supply |
| Pin 9 | VSS β Ground |
| Pin 10 | VDDA β Analog power supply |
| Pin 11 | PA0 β GPIO / ADC input |
| Pin 12 | PA1 β GPIO / ADC input |
| Pin 13 | PA2 β GPIO / USART2_TX |
| Pin 14 | PA3 β GPIO / USART2_RX |
| Pin 15 | PA4 β GPIO / SPI1_NSS |
| Pin 16 | PA5 β GPIO / SPI1_SCK |
| Pin 17 | PA6 β GPIO / SPI1_MISO |
| Pin 18 | PA7 β GPIO / SPI1_MOSI |
| Pin 19 | PA8 β GPIO / TIM1_CH1 |
| Pin 20 | PA9 β GPIO / USART1_TX |
| Pin 21 | PA10 β GPIO / USART1_RX |
| Pin 22 | PA11 β GPIO / USB_DM |
| Pin 23 | PA12 β GPIO / USB_DP |
| Pin 24 | PA13 β GPIO / SWDIO |
| Pin 25 | PA14 β GPIO / SWCLK |
| Pin 26 | PA15 β GPIO / JTDI |
| Pin 27 | PB0 β GPIO / ADC input |
| Pin 28 | PB1 β GPIO / ADC input |
| Pin 29 | PB2 β GPIO / BOOT1 |
| Pin 30 | PB3 β GPIO / JTDO |
| Pin 31 | PB4 β GPIO / NJTRST |
| Pin 32 | PB5 β GPIO / I2C1_SMBA |
| Pin 33 | PB6 β GPIO / I2C1_SCL |
| Pin 34 | PB7 β GPIO / I2C1_SDA |
| Pin 35 | PB8 β GPIO / CAN1_RX |
| Pin 36 | PB9 β GPIO / CAN1_TX |
| Pin 37 | PB10 β GPIO / I2C2_SCL |
| Pin 38 | PB11 β GPIO / I2C2_SDA |
| Pin 39 | PB12 β GPIO / SPI2_NSS |
| Pin 40 | PB13 β GPIO / SPI2_SCK |
| Pin 41 | PB14 β GPIO / SPI2_MISO |
| Pin 42 | PB15 β GPIO / SPI2_MOSI |
| Pin 43 | PC0 β GPIO / ADC input |
| Pin 44 | PC1 β GPIO / ADC input |
| Pin 45 | PC2 β GPIO / ADC input |
| Pin 46 | PC3 β GPIO / ADC input |
| Pin 47 | PC4 β GPIO / ADC input |
| Pin 48 | PC5 β GPIO / ADC input |
| Pin 49 | PC6 β GPIO / TIM3_CH1 |
| Pin 50 | PC7 β GPIO / TIM3_CH2 |
| Pin 51 | PC8 β GPIO / TIM3_CH3 |
| Pin 52 | PC9 β GPIO / TIM3_CH4 |
| Pin 53 | PC10 β GPIO / USART4_TX |
| Pin 54 | PC11 β GPIO / USART4_RX |
| Pin 55 | PC12 β GPIO / USART5_TX |
| Pin 56 | PD0 β GPIO / CAN2_RX |
| Pin 57 | PD1 β GPIO / CAN2_TX |
| Pin 58 | PD2 β GPIO / TIM1_ETR |
| Pin 59 | VDD β Digital power supply |
| Pin 60 | VSS β Ground |
| Pin 61 | VDDA β Analog power supply |
| Pin 62 | VREF+ β ADC reference voltage |
| Pin 63 | VREF- β ADC reference ground |
| Pin 64 | VSSA β Analog ground |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
STM32G474RET6 is suitable for 6 applications: Field-Oriented Control (FOC) of Brushless DC Motors, Digital Power Supplies (Buck, Boost, Flyback), Solar Inverters, Industrial Automation and Robotics, Battery Management Systems (BMS), Power Tools and Home Appliances.
Field-Oriented Control (FOC) of Brushless DC Motors
The STM32G474RET6 is ideal for FOC of brushless DC motors due to its high-resolution timer (HRTIM) with 184 ps PWM resolution and fast 12-bit ADC (5 MSPS). In a typical FOC application, the MCU reads phase currents via the ADC, computes the rotor position using Hall sensors or encoders, and generates PWM signals to drive the inverter. The HRTIM ensures precise switching, reducing torque ripple and improving efficiency. The CORDIC accelerator speeds up trigonometric calculations for Park/Clarke transforms, offloading the CPU. Compared to general-purpose MCUs, the STM32G474RET6 offers superior real-time performance, enabling smoother motor control at high speeds. Designers should ensure proper isolation between power and control stages and use differential sensing for accurate current measurement.
Recommended
Digital Power Supplies (Buck, Boost, Flyback)
The STM32G474RET6 excels in digital power conversion, leveraging its high-resolution timer and fast ADC to implement voltage-mode or current-mode control loops. In a buck converter, the MCU samples the output voltage and inductor current, computes the duty cycle using a PID algorithm, and updates the PWM output. The HRTIM's 184 ps resolution allows precise control of switching frequency and duty cycle, minimizing output ripple. The device's comparators can be used for cycle-by-cycle current limiting, protecting the converter from overcurrent conditions. The FMAC accelerator can implement digital filters for loop compensation, reducing CPU load. Compared to analog controllers, the STM32G474RET6 offers flexibility in tuning and monitoring, enabling adaptive control strategies. Designers should pay attention to ADC sampling timing to avoid aliasing and ensure stable operation across load transients.
Recommended
Solar Inverters
The STM32G474RET6 is well-suited for solar inverter applications, where it manages maximum power point tracking (MPPT) and grid synchronization. The MCU's high-speed ADC samples solar panel voltage and current to implement MPPT algorithms, while the HRTIM generates PWM signals for the DC-DC and DC-AC stages. The CORDIC accelerator computes phase angles for grid synchronization, and the CAN FD interface enables communication with other system components. The device's robust analog front-end, including comparators and op-amps, simplifies signal conditioning. Compared to DSPs, the STM32G474RET6 offers a more integrated solution with lower cost and power consumption. Designers should ensure proper isolation between the high-voltage DC bus and the MCU, and implement comprehensive protection features such as overvoltage and overcurrent detection.
Recommended
Industrial Automation and Robotics
The STM32G474RET6 is a powerful choice for industrial automation and robotics, providing real-time control of actuators, sensors, and communication interfaces. Its 170 MHz Cortex-M4 core with FPU handles complex kinematics and trajectory planning, while the multiple timers and PWM outputs drive servo motors and stepper motors. The device's rich set of communication interfaces (CAN FD, USART, SPI, I2C) enables seamless integration with industrial networks like EtherCAT (via external PHY) and Modbus. The high-resolution ADC and comparators allow precise monitoring of analog sensors, such as position encoders and force sensors. Compared to lower-end MCUs, the STM32G474RET6 offers superior computational power and peripheral integration, reducing system complexity. Designers should consider using the device's low-power modes to reduce energy consumption in battery-powered robots.
Recommended
Battery Management Systems (BMS)
The STM32G474RET6 is suitable for battery management systems, where it monitors cell voltages, currents, and temperatures to ensure safe operation. Its 12-bit ADC with multiple channels can sample several cells sequentially, while the comparators can trigger overvoltage/undervoltage protection. The device's low-power modes are beneficial for extending battery life in standby. The CAN FD interface allows communication with the main controller in electric vehicles or energy storage systems. The FMAC accelerator can implement digital filters for accurate state-of-charge (SOC) estimation. Compared to dedicated BMS ICs, the STM32G474RET6 offers flexibility in implementing custom algorithms and protection schemes. Designers should ensure proper galvanic isolation between the high-voltage battery pack and the MCU, and use precision voltage references for accurate measurements.
Recommended
Power Tools and Home Appliances
The STM32G474RET6 is ideal for power tools and home appliances, providing efficient motor control and user interface management. In a power tool, the MCU controls a brushless DC motor with FOC, delivering high torque and speed regulation. The device's compact LQFP-64 package fits into space-constrained designs, and its low-power modes extend battery life. The integrated op-amps and comparators reduce external component count, lowering BOM cost. The device's robust design, with operating temperature up to 85C (or 125C for the Q variant), ensures reliability in demanding environments. Compared to dedicated motor control ICs, the STM32G474RET6 offers more flexibility for adding features like Bluetooth connectivity (via external module) or advanced diagnostics. Designers should implement proper thermal management and EMI filtering to meet regulatory standards.
Recommended
Recommended Products Summary
Engineering reference data for STM32G474RET6 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32G474RCT6 | STM32G474RET6TR | STM32G474RET6Q |
|---|---|---|---|---|
| Package | LQFP-64 | LQFP-64 - same | LQFP-64 - same | LQFP-64 - same |
| Flash Memory | 512 KB | 256 KB | 512 KB | 512 KB |
| SRAM | 128 KB | 128 KB | 128 KB | 128 KB |
| Maximum Clock Frequency | 170 MHz | 170 MHz | 170 MHz | 170 MHz |
| Operating Temperature Range | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C |
| Packaging Type | Tray | Tray | Tape & Reel | Tray |
| Price (1 unit) | $8.50 | $7.20 | $8.50 | $9.10 |
| AEC-Q100 Qualification | No | No | No | No |
Key Differentiators
- Higher flash memory capacity (vs STM32G474RCT6)
- Extended temperature range option (vs STM32G474RET6Q)
- Tape and reel packaging option (vs STM32G474RET6TR)
Design Notes
Decouple all VDD and VDDA pins with 100 nF ceramic capacitors placed as close as possible to the pins. Additionally, use a 4.7 uF capacitor on the main VDD rail and a 1 uF capacitor on VDDA. For the VREF+ pin, use a 1 uF capacitor to ground to ensure stable ADC reference. The device operates from 1.71V to 3.6V, so ensure the supply is within this range under all load conditions.
For high-resolution timer (HRTIM) outputs, route traces with controlled impedance and keep them short to minimize parasitic inductance. Use a solid ground plane beneath the MCU to reduce noise. For ADC inputs, add a small RC filter (e.g., 10 ohm, 1 nF) to reduce aliasing and improve accuracy. Place the crystal oscillator (if used) close to the OSC_IN/OSC_OUT pins with proper load capacitors.
The STM32G474RET6 in LQFP-64 package has a thermal resistance (theta_JA) of approximately 45 C/W. At 170 MHz with all peripherals active, power dissipation can reach 500 mW, resulting in a temperature rise of 22.5C above ambient. Ensure adequate airflow or a thermal pad on the PCB to keep the junction temperature within the specified range. For the Q variant (extended temperature), the maximum junction temperature is 125C.
Compliance Information
RoHS compliant per STMicroelectronics. Not AEC-Q100 qualified; for automotive, consider STM32G4 series with AEC-Q100 option.
