STM32G431CBT3 - 170MHz Cortex-M4 MCU | STMicroelectronics
MPN: STM32G431CBT3 ✓ ActiveSTM32G431CBT3 Overview
A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals on one package. STM32G4 devices occupy the middle of the STMicroelectronics product hierarchy: they combine general-purpose embedded control with higher processing performance than basic microcontroller families. The Cortex-M4 architecture supports efficient execution of control code and floating-point operations while retaining the low-power and deterministic characteristics expected from embedded processors.
The STM32G431CBT3 reaches 170 MHz and is specified at up to 213 DMIPS. Its memory configuration provides 128 KB of Flash for firmware and 32 KB of SRAM for working data. The 48-LQFP package exposes a conventional leaded surface-mount footprint and can support compact PCB layouts without requiring the fine-pitch assembly associated with smaller leadless packages.
The STM32G431CBT3 belongs to the STM32G4 family and uses an Arm Cortex-M4 core with FPU. Its single-core architecture provides a straightforward execution model for embedded control tasks, while the 170 MHz operating point supports more demanding control loops and computational workloads. The 128 KB Flash and 32 KB SRAM balance firmware capacity against RAM requirements without moving to a larger memory configuration.
Typical applications include digital power controllers, industrial motor-control equipment, sensor-processing systems, industrial automation controllers, and compact embedded instruments. In these systems, the MCU can combine control-loop execution with communications and peripheral handling in a single device, reducing component count and simplifying firmware coordination.
PCB implementation should follow the manufacturer pin-description table and package drawing. Place decoupling capacitors close to the supply pins, preserve the exposed land-pattern requirements of the 48-LQFP footprint, and route high-speed or sensitive signals away from switching nodes. Firmware selection, peripheral configuration, clock setup, and pin multiplexing must be checked against the exact device revision and datasheet.
This product page consolidates the identified STM32G431CBT3 specifications, package information, sourcing workflow, and engineering guidance. It also distinguishes exact drop-in replacements from alternatives that require firmware, peripheral, or package validation, helping engineers make a defensible design decision before committing a new PCB revision.
Drop-in alternatives for STM32G431CBT3 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32G431CBT3 (same form factor and footprint) — differing in Flash Memory, Maximum Clock Frequency, Package, SRAM.
No drop-in alternatives available for this product.
Request AlternativesSTM32G431CBT3 Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit Microcontroller IC |
| Series | STM32G4 |
| Processor Core | Arm Cortex-M4 |
| Architecture | 32-bit |
| FPU | Present |
| Maximum Clock Frequency | 170 MHz |
| Maximum Performance | 213 DMIPS |
| Core Count | 1 |
| Flash Memory | 128 KB (128K x 8) |
| SRAM | 32 KB |
| Package | 48-LQFP (7 x 7 mm) |
| Mounting Type | Surface Mount |
| Pin Count | 48 pins |
STM32G431CBT3 48-lqfp (7 x 7 mm) Pin Configuration Guide
Pin configuration for STM32G431CBT3 (48-lqfp (7 x 7 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM32G431CBT3.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32G431CBT3 is suitable for 6 applications: Digital Power Control, Industrial Motor Control, Sensor Processing, Industrial Automation Controller, Connected Embedded Instrument, Precision Control Module.
Digital Power Control
STM32G431CBT3 fits digital power-control loops because its 170 MHz Cortex-M4 core provides up to 213 DMIPS while the FPU supports efficient fixed-point and floating-point control calculations. The 128 KB Flash can hold control firmware, parameter tables, and fault-handling routines, while 32 KB SRAM supports working state and time-critical calculations. Place the MCU in a 48-LQFP footprint that keeps switching-node copper away from control inputs. Verify the specific timer channels, analog resources, operating-temperature grade, and control-loop timing required by the power stage before releasing the design.
Industrial Motor Control
The STM32G431CBT3 is suitable for compact industrial motor-control controllers that need deterministic embedded computation without a high-end application processor. Its Cortex-M4 processor runs at 170 MHz with up to 213 DMIPS, providing headroom for commutation, current-control, and supervisory tasks. The 128 KB Flash supports a substantial embedded application, and 32 KB SRAM can hold control variables and communication buffers. The 48-LQFP package is also convenient for prototypes and production boards that benefit from visible leads. Final suitability depends on matching the required timers, encoders, analog inputs, communications, and isolation arrangement.
Sensor Processing
STM32G431CBT3 can act as the central processor in a sensor-processing module that combines acquisition, filtering, calibration, and communications. The 170 MHz Cortex-M4 core and FPU provide useful computation throughput for digital filters and control calculations, while 32 KB of SRAM supports working buffers. Firmware, sensor tables, and calibration coefficients fit within the 128 KB Flash allocation. The 48-LQFP format supports conventional surface-mount assembly and simplifies manual inspection compared with a leadless package. Confirm the required ADC, timer, communication peripheral, sensor interface, and environmental ratings during component selection.
Industrial Automation Controller
STM32G431CBT3 supports industrial automation modules that must execute control functions and manage local interfaces within a compact embedded platform. Its single-core 170 MHz architecture and up to 213 DMIPS provide processing capacity for real-time supervisory logic, data conditioning, and protocol handling. The 128 KB Flash and 32 KB SRAM form a balanced memory configuration for moderate firmware complexity. The 48-LQFP package gives designers a conventional leaded footprint for reliable assembly and inspection. Engineering should confirm the exact peripheral mix, clock requirements, supply limits, temperature range, and functional-safety needs before committing the MCU.
Connected Embedded Instrument
STM32G431CBT3 can serve as the control and communications core in a connected embedded instrument that combines local measurement, user-interface handling, and data transfer. The 170 MHz Cortex-M4 core allows responsive peripheral servicing, while the FPU benefits numerical processing tasks. Its 128 KB Flash stores application and protocol code, and 32 KB SRAM accommodates active buffers. The 48-LQFP package is practical for compact boards that must remain easy to assemble and inspect. Validate the required display, communications, analog measurement channels, brownout behavior, and operating-temperature grade against the manufacturer datasheet before schematic release.
Precision Control Module
STM32G431CBT3 is appropriate for precision embedded modules where computational throughput matters but a low-power microcontroller form factor is preferred. The Arm Cortex-M4 core operates at 170 MHz and delivers up to 213 DMIPS, supporting responsive control and filtering functions. With 128 KB of Flash and 32 KB of SRAM, it can accommodate a focused application without moving immediately to a larger-memory MCU. The 48-LQFP package supports surface-mount assembly and maintainable laboratory prototypes. Select only after checking timer resolution, analog performance, communication interfaces, clock tree, voltage range, and environmental qualification for the target application.
Engineering reference data for STM32G431CBT3 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Brand | STMicroelectronics |
| Package | 48-LQFP (7 x 7 mm) |
| Processor Core | Arm Cortex-M4 |
| Architecture | 32-bit |
| Maximum Clock Frequency | 170 MHz |
| Maximum Performance | 213 DMIPS |
| Flash Memory | 128 KB |
| SRAM | 32 KB |
| FPU | Present |
| Core Count | 1 |
Key Differentiators
- High processing performance in a 48-LQFP device (vs STM32F050C4T6A)
- Balanced memory configuration for embedded control (vs STM32G431CBT3TR)
- Conventional 48-LQFP assembly format (vs STM32L4R5ZIT6)
Design Notes
Create the 48-LQFP footprint from the exact STMicroelectronics package drawing and verify pin-one orientation against the PCB silkscreen and assembly drawing. Keep the component-side ground and supply distribution paths short, and place local decoupling capacitors close to the corresponding IC pins in accordance with the datasheet layout guidance. Do not reuse a generic 48-LQFP footprint without checking body dimensions, lead pitch, toe geometry, and solder-mask clearance.
Separate sensitive control, measurement, and communication routes from switching power nodes and high-current motor or relay paths. A controlled ground strategy should prevent aggressive return currents from crossing the MCU reference plane beneath clock, analog, or communications pins. If the design combines digital control with a switching converter or motor driver, route quiet ground returns away from high di/dt paths and reserve thermal copper for the power stage rather than relying on it to regulate sensitive signals.
Do not treat a similar Cortex-M device as a drop-in substitute merely because it fits an LQFP footprint. Verify the 48-pin assignment, power pins, ground pins, reset and debug functions, clock inputs, boot configuration, peripheral mapping, voltage limits, memory capacity, and package dimensions. After PCB fabrication, validate startup, clock configuration, peripheral initialization, and production programming using the exact STM32G431CBT3 firmware target and the intended programming and debug interface.
Compliance Information
The identified product and technical records do not provide explicit compliance statements for this exact MPN. Confirm RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals status against the current manufacturer product documentation and procurement requirements.