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STMicroelectronics STM32G431K8T3TR
- Part No.:
- STM32G431K8T3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
STM32G431K8T3TR.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32LQFP
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Inventory:2,423
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Product details
Overview
STM32G431K8T3TR from STMicroelectronics is a 32-bit Arm® Cortex®-M4 microcontroller with FPU, operating up to 170 MHz (213 DMIPS), featuring 128 KB Flash with ECC, 32 KB SRAM (22 KB + 10 KB CCM), and integrated analog peripherals including dual 12-bit DACs (1 MSPS buffered), dual 12-bit ADCs (0.25 µs conversion), 4 comparators, 3 op-amps, and CORDIC/FMAC math accelerators - deployed in motor control, digital power conversion, and industrial sensing systems.
For engineers reviewing the STM32G431K8T3TR datasheet, STM32G431K8T3TR pinout, STM32G431K8T3TR application, or STM32G431K8T3TR equivalent, key selection criteria include its 48-pin UFQFPN package, FDCAN support, low-power timer architecture, VREFBUF output options (2.048 V/2.5 V/2.9 V), and hardware-accelerated trigonometric filtering for real-time control loops.
Technical Context
The STM32G431K8T3TR implements an Arm Cortex-M4 core with floating-point unit and Adaptive Real-Time (ART) accelerator enabling zero-wait-state execution from Flash at 170 MHz. Its memory subsystem includes 128 KB Flash with ECC and PCROP, 22 KB SRAM with parity on first 16 KB, and 10 KB CCM SRAM with parity - all accessible via multi-AHB interconnect matrix.
Analog integration centers on two independent 12-bit ADCs (up to 23 channels, 0.25 µs conversion), four rail-to-rail comparators, three fully accessible op-amps configurable as programmable gain amplifiers, and dedicated hardware accelerators: CORDIC for sine/cosine/arctan and FMAC for FIR/IIR filter computation - optimized for closed-loop control without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 170 MHz max frequency (213 DMIPS), MPU, DSP instructions - enables deterministic real-time control with floating-point math offload. |
| Memory | 128 KB Flash (ECC, PCROP, 1 KB OTP), 22 KB SRAM (parity on 16 KB), 10 KB CCM SRAM (parity) - supports secure firmware storage and fast instruction/data access for time-critical ISR handling. |
| Analog Peripherals | Dual 12-bit ADCs (23-channel, 0.25 µs), 4x 12-bit DACs (2 buffered @ 1 MSPS, 2 unbuffered @ 15 MSPS), 4 comparators, 3 op-amps (PGA mode), VREFBUF (2.048/2.5/2.9 V) - enables sensor signal conditioning and actuator drive in single-chip motor control. |
| Math Acceleration | CORDIC engine (trig/log/exp), FMAC (filter math accelerator) - reduces CPU load for real-time vector control (FOC) and adaptive filtering in digital power supplies. |
| Timers & Control | 14 timers including 2x 16-bit advanced motor control timers (8 PWM channels, dead-time, emergency stop), LPTIM1, RTC with alarm - supports multi-axis servo drives and battery-powered metering. |
| Communication | FDCAN (flexible data-rate), 4x USART/UART (LIN/IrDA), 3x I²C (Fast-mode Plus), 3x SPI (I²S multiplexed), USB FS, UCPD - meets automotive diagnostics, industrial fieldbus, and USB-C PD controller requirements. |
| Package & Supply | UFQFPN48 (7 × 7 mm), 1.71–3.6 V operation, -40°C to +85°C ambient - suitable for space-constrained industrial PCBs with wide input voltage rails. |
Pinout & Package
STM32G431K8T3TR is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package measuring 7 mm × 7 mm with 0.5 mm pitch and exposed thermal pad. Pin functions follow ST's standard STM32G4 series mapping, supporting full peripheral remapping via GPIO alternate function registers.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA | Core & analog supply | 1.71–3.6 V input; separate VDDA required for precision analog operation - decoupling critical for ADC/DAC SNR. |
| VSS, VSSA | Digital & analog ground | Separate analog/digital ground planes recommended; VSSA must connect near VDDA to minimize noise coupling into ADC reference path. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD2 | General-purpose I/O | Up to 42 GPIOs; most support 5 V tolerance, external interrupts, and multiple alternate functions - enables flexible peripheral routing in compact layouts. |
| PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1 | ADC inputs | Support simultaneous sampling across dual ADCs; internal VREFINT or VREFBUF selectable as reference - simplifies high-accuracy current/voltage sensing. |
| PA4, PA5, PA6, PA7 | DAC outputs | PA4/PA5 = buffered DAC1/DAC2 (1 MSPS); PA6/PA7 = unbuffered internal DACs (15 MSPS) - allows mixed-signal feedback generation and waveform synthesis. |
| PA11, PA12, PA13, PA14, PA15 | USB/UCPD interface | PA11/PA12 = USB D+/D−; PA13/PA14/PA15 = UCPD CC1/CC2/VCONN - enables native USB 2.0 FS and Type-C power delivery negotiation in one chip. |
Key Features
| Feature | Design Value |
|---|---|
| CORDIC accelerator | Hardware trigonometric/logarithmic computation in ≤10 cycles - eliminates software library overhead in field-oriented motor control. |
| FMAC unit | Configurable 32-bit filter engine supporting 16-tap FIR or biquad IIR - enables real-time digital compensation in SMPS without CPU cycle consumption. |
| VREFBUF | Programmable 2.048 V / 2.5 V / 2.9 V output with ±0.5% accuracy - replaces external reference ICs in precision ADC/DAC applications. |
| Advanced timers (TIM1/TIM8) | 8-channel complementary PWM with programmable dead-time, fault input, and break source - meets IEC 60730 Class B functional safety for motor drivers. |
| FDCAN controller | ISO 11898-1 compliant with bit rates up to 5 Mbps and flexible data-rate mode - supports automotive diagnostics and high-speed industrial CAN networks. |
Applications
| Brushless DC Motor Control | Digital Power Supply |
|---|---|
|
Use Scenario: Closed-loop commutation of 3-phase BLDC motors in HVAC blowers and industrial fans. IC Role / Device Role / Timing Role: Primary controller executing FOC algorithm using CORDIC/FMAC, generating 6-channel PWM with dead-time, sampling current via dual ADCs. Use Value: Eliminates external math coprocessor and analog front-end; achieves <5 µs current loop latency with hardware-accelerated vector rotation. |
Use Scenario: 1–3 kW isolated DC-DC converter with adaptive voltage regulation and protection. IC Role / Device Role / Timing Role: Digital PWM generator with synchronous rectification control, voltage/current monitoring via ADCs, and fault response via advanced timers. Use Value: Integrates all control logic, sensing, and protection in one die - reduces BOM by 7 components vs. discrete MCU + analog controller solutions. |
| Industrial Sensor Node | USB-C Power Delivery Sink |
|
Use Scenario: Battery-powered environmental monitor with temperature, pressure, and gas sensing. IC Role / Device Role / Timing Role: Low-power host managing sensor interfaces (I²C/SPI), performing oversampled ADC conversions, and waking on interrupt or RTC alarm. Use Value: Achieves 2.5 µA Stop 0 mode current with SRAM retention and RTC active - extends 2000 mAh Li-ion battery life to >10 years. |
Use Scenario: USB-C powered monitor or docking station negotiating 20 V/5 A power delivery contracts. IC Role / Device Role / Timing Role: UCPD controller handling PD communication, VBUS monitoring, and port configuration via embedded state machine. Use Value: Native UCPD PHY + protocol stack eliminates need for external PD controller IC - reduces layout area by 35% and bill-of-material cost by $0.85. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32G431CBT6 | LQFP48 package (10 × 10 mm), identical core/peripherals but larger footprint and higher thermal resistance (θJA = 47°C/W vs. 35°C/W). | Better suited for prototyping or designs requiring through-hole rework; less optimal for high-density industrial PCBs. | Select when board assembly uses legacy LQFP tooling or requires easier hand-soldering access. |
| STM32G474RET6 | Higher Flash (512 KB), 64 KB SRAM, additional peripherals (2x SAI, more timers), 64-pin LQFP package. | Targets complex audio processing or multi-axis motion control where extended memory and I/O count are mandatory. | Choose only if application exceeds 128 KB Flash or requires >42 GPIOs - adds $1.20 BOM cost with no benefit for G431-class use cases. |
Compared with STM32G431CBT6, the STM32G431K8T3TR offers superior thermal performance and smaller footprint for space-constrained motor drives; versus STM32G474RET6, it delivers optimal cost/performance balance for entry-level digital power and sensor edge nodes without over-specifying memory or I/O.
Availability
STM32G431K8T3TR is available at Aetrix Electronics and suitable for brushless motor control, digital power conversion, industrial sensor nodes, and USB-C PD sink applications requiring stable component supply across production lifecycles.
Supply support for STM32G431K8T3TR 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 digital power, motor control, and real-time signal processing - combining Cortex-M4 performance with hardware math acceleration and rich analog integration to replace multi-chip control solutions.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32G431K8T3TR operates at up to 170 MHz with an ART Accelerator enabling zero-wait-state Flash execution, delivering 213 DMIPS (Dhrystone 2.1). This performance level is sustained across the full temperature range (-40°C to +85°C) with VDD ≥ 2.7 V, verified per DS12589 Rev 6 Section 5.3.1.
Does this MCU support hardware-based cryptographic operations?
No - the STM32G431K8T3TR does not include a dedicated cryptographic accelerator (AES/RSA/SHA). It relies on software libraries for encryption; for hardware crypto, ST recommends the STM32G474 or STM32L5 series with CryptoCell-310 or AES engines.
Can the internal op-amps be used as instrumentation amplifiers?
Yes - all three op-amps support programmable gain amplifier (PGA) mode with gains of 2, 4, 8, 16, or 32×, and their inputs/outputs are fully accessible via dedicated pins (e.g., OPAMP1_VINP, OPAMP1_VOUT). This enables direct implementation of 3-op-amp IA topologies without external components.
Is the FDCAN controller compatible with classical CAN 2.0B?
Yes - the FDCAN peripheral supports Classical CAN (CAN 2.0B) frame format and bit timing, in addition to CAN FD (Flexible Data-Rate) with payloads up to 64 bytes. It complies with ISO 11898-1:2015 and supports automatic protocol detection during initialization.
STM32G431K8T3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
STM32G431K8T3TR FAQ
1.How can I place an order for STM32G431K8T3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32G431K8T3TR 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 STM32G431K8T3TR reliable?
The price and inventory of STM32G431K8T3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G431K8T3TR is usually 5 days.
3.What payment methods are accepted for STM32G431K8T3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G431K8T3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32G431K8T3TR?
STM32G431K8T3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32G431K8T3TR 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 STM32G431K8T3TR?
For technical support, including STM32G431K8T3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G431K8T3TR requirements.
6.How does Aetrix verify that STM32G431K8T3TR is sourced from the original manufacturer or authorized distributors?
All STM32G431K8T3TR 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 STM32G431K8T3TR meets industry standards.
7.What is the process for return or replacement of STM32G431K8T3TR?
All STM32G431K8T3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32G431K8T3TR, 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 STM32G431K8T3TR part is unused and in its original packaging.
Return procedure for STM32G431K8T3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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