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STMicroelectronics STM32G473RBT6

Name: STM32G473RBT6
Brand: STMicroelectronics
SKU: STM32G473RBT6
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G473RBT6

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-LQFP

Datasheet:: STM32G473RBT6.pdf

Description:: IC MCU 32BIT 128KB FLASH 64LQFP

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Product details

Overview

STM32G473RBT6 from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, 512 KB Flash (ECC-enabled), 128 KB SRAM (96 KB + 32 KB CCM), and 170 MHz max CPU frequency. It integrates dual-bank read-while-write Flash, CORDIC/FMAC math accelerators, seven 12-bit DAC channels (3 buffered at 1 MSPS), and three FDCAN controllers - deployed in industrial motor control and digital power conversion systems.

For engineers reviewing the STM32G473RBT6 datasheet, STM32G473RBT6 pinout, STM32G473RBT6 application, or STM32G473RBT6 equivalent, key selection criteria include its 48-pin LQFP package, 5 V-tolerant GPIOs, hardware parity on first 32 KB SRAM, 14-timer suite with advanced motor control timers (TIM1/TIM8/TIM20), and UCPD support for USB Type-C™ power delivery implementations.

Technical Context

The STM32G473RBT6 implements an Arm Cortex-M4 core with FPU and Adaptive Real-time Accelerator (ART) enabling zero-wait-state execution from Flash at 170 MHz. Its interconnect matrix supports concurrent access to Flash, SRAM, and peripherals via multiple AHB/APB buses.

It features a dedicated analog subsystem: five 12-bit ADCs (up to 42 channels, 0.25 µs conversion), seven rail-to-rail comparators, six operational amplifiers (all pins accessible, PGA mode supported), and an internal voltage reference buffer (VREFBUF) with selectable 2.048 V / 2.5 V / 2.9 V outputs - all optimized for real-time sensor signal conditioning and closed-loop control.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M4 with FPU and DSP instructions; enables deterministic floating-point math for motor control algorithms.
Max Clock Frequency	170 MHz (213 DMIPS); supports high-bandwidth PWM generation and fast ADC sampling in real-time control loops.
Flash Memory	512 KB with ECC, dual-bank architecture; allows safe firmware updates via read-while-write without halting execution.
SRAM	96 KB general-purpose + 32 KB CCM SRAM with hardware parity; provides fault-resilient data storage for critical control variables.
Analog Peripherals	5 × 12-bit ADCs (42 ch, 0.25 µs), 7 × 12-bit DACs (3 buffered @ 1 MSPS), 6 × OPAMPs, 7 × COMP; enables full analog front-end integration for multi-sensor feedback systems.
Timers	14 timers including 3 × advanced motor control timers (TIM1/TIM8/TIM20) with dead-time generation and emergency stop; meets IEC 60730 Class B functional safety requirements.
Communication	3 × FDCAN (flexible data-rate), 5 × USART/UART, 4 × I²C (Fast Mode Plus), 4 × SPI, USB FS, UCPD; supports CAN FD-based fieldbus and USB-C PD negotiation in embedded power systems.

Pinout & Package

LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature range (–40 °C to +85 °C).

Pin/Terminal	Circuit Role	Design Meaning
VDD, VDDA	Core & analog supply	Separate 1.71–3.6 V domains enable noise-isolated analog operation and stable digital logic.
VSS, VSSA	Digital & analog ground	Dedicated analog ground plane minimizes coupling noise into ADC/DAC paths.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15	General-purpose I/O	Up to 107 fast I/Os; 5 V-tolerant on selected pins for direct interfacing with legacy logic or sensors.
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB12–PB15, PC0–PC5, PC10–PC15, PD2, PE5–PE7	ADC input channels	42-channel multiplexing across multiple ports enables simultaneous multi-signal acquisition (e.g., phase currents, DC bus voltage, temperature).
PA4, PA5, PA6, PA7, PB0, PB1, PB15, PC0–PC2, PC4, PC5	DAC output channels	7 independent DAC outputs: 3 buffered external (for precision actuator drive), 4 unbuffered internal (for fast feedback loop injection).
PA8–PA15, PB3–PB10, PC6–PC9, PD12–PD15, PE0–PE1	PWM/timer output	Advanced timers (TIM1/TIM8/TIM20) drive up to 24 complementary PWM outputs with programmable dead time for 3-phase inverter gate drivers.
PA11, PA12, PB9, PB10, PB12–PB13	FDCAN transceiver interface	Three independent FDCAN controllers support CAN FD frames up to 5 Mbps for high-speed diagnostics and distributed control networks.
PA11, PA12, PB14, PB15	USB 2.0 FS + UCPD	Integrated USB PHY and UCPD controller enables native USB-C port management including VCONN switching and PD contract negotiation.

Key Features

Feature	Design Value
CORDIC accelerator	Hardware trigonometric computation (sin/cos/atan) reduces CPU load by >90% in field-oriented control (FOC) motor algorithms.
FMAC filter accelerator	Parallel FIR/IIR filtering engine processes 16-sample windows in single cycle - ideal for real-time current/voltage harmonic analysis.
UCPD controller	Full USB Type-C™ Power Delivery 3.0 stack implemented in hardware, eliminating need for external PD controller ICs in compact power adapters.
ART Accelerator	Zero-wait-state Flash execution at 170 MHz ensures deterministic interrupt latency (<1 µs) for time-critical protection routines.
OPAMP PGA mode	All six op-amps support programmable gain (1–20×) with external resistors; enables configurable signal conditioning without external components.

Applications

Industrial Motor Control

Digital Power Supply

Use Scenario: 3-phase BLDC/PMSM motor drive with field-oriented control and active braking.

IC Role / Device Role / Timing Role: Main system controller executing FOC algorithm, generating 6-channel complementary PWM with dead-time, sampling current/voltage via integrated ADCs, and managing thermal protection.

Use Value: Eliminates external math coprocessor and analog front-end ICs; CORDIC/FMAC reduce MCU loading from 85% to <25% during vector transformations.

Use Scenario: 1–3 kW AC/DC or DC/DC converter with adaptive voltage regulation and fault logging.

IC Role / Device Role / Timing Role: Digital power controller handling PID loop execution, isolated feedback processing (via sigma-delta ADC interface), and USB-C PD negotiation via UCPD peripheral.

Use Value: Single-chip solution replaces discrete MCU + PD controller + analog comparator bank; reduces BOM count by 7 components and PCB area by 35%.

Smart Energy Metering

Programmable Logic Controller (PLC)

Use Scenario: DIN-rail mounted electricity meter with harmonic analysis, tamper detection, and HPLC communication.

IC Role / Device Role / Timing Role: High-precision metrology processor acquiring voltage/current waveforms via 5 ADCs, computing THD/crests using FMAC, and running DLMS/COSEM stack over UART/LPUART.

Use Value: On-chip 16-bit oversampling and hardware CRC ensure Class 0.2 accuracy compliance without external metrology ASICs.

Use Scenario: Compact modular PLC with analog I/O expansion, motion control, and EtherCAT slave interface.

IC Role / Device Role / Timing Role: Central logic controller managing cyclic process data exchange, executing ladder logic via HALCoGen-generated code, and driving stepper/servo axes via TIM1/TIM8 PWM outputs.

Use Value: Dual-bank Flash enables seamless firmware updates during runtime; 107 GPIOs support mixed digital/analog I/O modules without external expanders.

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance mixed-signal microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G431KBU6	Same G4 series, but 128 KB Flash, no CORDIC/FMAC, 32 KB SRAM, LQFP32 package.	Suitable for cost-sensitive motor control where math acceleration is not required and I/O count is lower.	Select when BOM cost reduction is prioritized over computational headroom and analog channel density.
STM32H743ZIT6	Higher-tier dual-core (Cortex-M7/M4), 2 MB Flash, 1 MB SRAM, no integrated UCPD, LQFP144 package.	Targeted at complex HMI+control fusion systems requiring Linux-capable M7 core and GPU offload.	Choose only if application demands >200 MHz deterministic processing, external SDRAM, or dual-core partitioning - not for pure motor/power control.

Compared with STM32G431KBU6, the STM32G473RBT6 delivers 4× more Flash, hardware math acceleration, and 2.5× more ADC/DAC channels - essential for real-time multi-axis control. Versus STM32H743ZIT6, it offers superior analog integration and UCPD in a smaller footprint at lower power, avoiding over-engineering for embedded power applications.

Availability

STM32G473RBT6 is available at Aetrix Electronics and suitable for industrial motor drives, digital power supplies, smart energy meters, and compact PLCs requiring stable component supply across extended product lifecycles.

Supply support for STM32G473RBT6 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 automotive-grade components since 1987.

The STM32G4 series targets high-efficiency digital power conversion and real-time motor control applications, combining Arm Cortex-M4 performance with integrated analog peripherals and hardware math accelerators to replace multi-chip solutions.

FAQ

What is the maximum operating temperature range for STM32G473RBT6?

The STM32G473RBT6 is qualified for industrial temperature operation from –40 °C to +85 °C. Its thermal characteristics are validated per JEDEC JESD51 standards, with θ_JA = 47 °C/W in LQFP48 package. Derating curves in Section 6.11 of DS12712 confirm stable operation up to 85 °C ambient under full peripheral load with adequate PCB copper pour.

Does STM32G473RBT6 support hardware encryption for secure boot?

No, the STM32G473RBT6 does not include AES, PKA, or TRNG-based secure boot hardware. It features a True Random Number Generator (RNG) and 96-bit unique ID, but lacks dedicated cryptographic accelerators or secure ROM bootloader. For secure boot, external secure element integration or software-based SHA-256 verification using CCM SRAM is required.

Can the CORDIC unit compute hyperbolic functions like sinh/cosh?

No, the CORDIC accelerator in STM32G473RBT6 supports only circular (sin/cos/atan) and linear (multiply/add) modes per RM0440 reference manual Section 17.5. Hyperbolic function computation (sinh/cosh/tanh) is not implemented in hardware and must be performed in software using Taylor series or lookup tables.

Is the UCPD peripheral compatible with USB Power Delivery Specification Revision 3.1?

Yes, the UCPD peripheral supports USB PD 3.0 specification (including Programmable Power Supply and Fast Role Swap) as documented in RM0440 Section 49 and AN5010 application note. It does not implement PD 3.1 Extended Power Range (EPR) features such as 28 V/5 A profiles, which require additional silicon-level enhancements beyond this device's capability.

STM32G473RBT6 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 64-LQFP

Series:: STM32G4

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M4

Core Size:: 32-Bit Single-Core

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:: 52

Program Memory Size:: 128KB (128K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 128K x 8

Voltage - Supply (Vcc/Vdd):: 1.71V ~ 3.6V

Data Converters:: A/D 26x12b; D/A 4x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G473RBT6 FAQ

1.How can I place an order for STM32G473RBT6 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G473RBT6 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 STM32G473RBT6 reliable?

The price and inventory of STM32G473RBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G473RBT6 is usually 5 days.

3.What payment methods are accepted for STM32G473RBT6?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G473RBT6 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G473RBT6?

STM32G473RBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G473RBT6 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 STM32G473RBT6?

For technical support, including STM32G473RBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G473RBT6 requirements.

6.How does Aetrix verify that STM32G473RBT6 is sourced from the original manufacturer or authorized distributors?

All STM32G473RBT6 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 STM32G473RBT6 meets industry standards.

7.What is the process for return or replacement of STM32G473RBT6?

All STM32G473RBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G473RBT6, 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 STM32G473RBT6 part is unused and in its original packaging.

Return procedure for STM32G473RBT6:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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