STM32G4A1KEU6 - 170MHz 512KB Cortex-M4 MCU | STMicroelectronics
MPN: STM32G4A1KEU6 ✓ ActiveSTM32G4A1KEU6 Overview
A microcontroller is a semiconductor device that integrates a processor core, programmable memory, peripheral interfaces, and support logic on one integrated circuit. The STM32G4 family belongs to the 32-bit microcontroller hierarchy, where a microcontroller serves as the central controller for industrial equipment, consumer products, instrumentation, communications equipment, and motor-control systems. Its integrated memory and peripherals help reduce external component count while providing a defined platform for firmware development.
The principal verified characteristics of the STM32G4A1KEU6 include a 170 MHz operating frequency, 512 KB of Flash, 32-bit processing, and Arm Cortex-M4F architecture. Its 512 KB of Flash provides room for application firmware, libraries, configuration data, and boot or update routines without requiring an external program-memory device. The 32-UFQFPN package also supports compact board layouts where a larger 48-pin or 64-pin MCU would be unnecessary.
STMicroelectronics describes the STM32G4A1xE devices as being based on the high-performance Arm Cortex-M4 32-bit RISC core. The Cortex-M4F designation identifies a 32-bit RISC processor with floating-point capability, while the G4A1 memory configuration differentiates this device from lower-memory members of the STM32G4 family. Firmware should be configured for the exact STM32G4A1KEU6 memory map, clock tree, peripheral set, and package rather than assuming that all STM32G4 devices are interchangeable.
Typical uses include industrial control modules, compact sensor nodes, communications equipment, motor-control boards, and embedded instruments. The 170 MHz Cortex-M4F core is suitable for responsive control tasks, communication protocol handling, and signal-processing workloads, while 512 KB of Flash supports projects that exceed the memory capacity of smaller entry-level microcontrollers. Package selection remains important because exposed-pad construction, thermal behavior, and board-layout requirements differ from leaded packages.
The primary design consideration is PCB land-pattern accuracy: the device requires a 32-pin UFQFPN footprint with an exposed thermal pad and appropriate assembly allowances. Designers must follow the manufacturer package drawing, provide a continuous ground-plane connection beneath the exposed pad, and follow the manufacturer’s reflow and inspection guidance. Firmware, boot configuration, clocking, and peripheral assignments should also be checked against the exact device variant before production release.
This page consolidates verified distributor and manufacturer information with qualified same-family alternatives, package constraints, and practical engineering guidance. Unlike a basic distributor listing, it distinguishes confirmed STM32G4A1KEU6 facts from unavailable electrical details and clearly flags where an engineering review is required before substituting another MCU.
Drop-in alternatives for STM32G4A1KEU6 — 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 STM32G4A1KEU6 (same form factor and footprint) — differing in Package, Core, Flash Memory, Mounting Type.
STM32G431KBT6
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →STM32G431K8T6
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →STM32G474KBT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32G474K8T6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32G491KBT6
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
STM32G4A1KEU6 Maximum Ratings & Electrical Characteristics
| Manufacturer | STMicroelectronics |
| Product Type | 32-bit microcontroller |
| Processor Core | Arm Cortex-M4F |
| Architecture | 32-bit RISC |
| Maximum Clock Frequency | 170 MHz |
| Flash Memory | 512 KB |
| Flash Organization | 512K x 8 |
| Package | 32-pin UFQFPN (5 x 5 mm) |
| Package Type | Surface-mount UFQFPN with exposed pad |
| Supply Voltage Range | 1.8 V, 2.5 V, or 3.3 V |
| Core | Arm Cortex-M4 |
| Product Series | STM32G4 |
| Device Subseries | STM32G4A1xE |
| Mounting Type | Surface Mount |
| Manufacturer Product Page | STM32G4A1KE product family page |
STM32G4A1KEU6 surface-mount ufqfpn with exposed pad Pin Configuration Guide
Pin configuration for STM32G4A1KEU6 (surface-mount ufqfpn with exposed pad 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 STM32G4A1KEU6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32G4A1KEU6 is suitable for 6 applications: Industrial Control Modules, Condition Monitoring Sensors, Communications Equipment, Motor-Control Boards, Portable Instrumentation, Digital Power Conversion.
Industrial Control Modules
The STM32G4A1KEU6 fits compact industrial control modules that require a 170 MHz Arm Cortex-M4F processor and 512 KB of local Flash without the footprint of a larger MCU. The 32-pin 5 x 5 mm UFQFPN package leaves board area for sensors, isolation, power conversion, and communications circuitry. Firmware can combine real-time control tasks, diagnostics, configuration storage, and communication handling in one device. The principal design trade-off is the exposed-pad land pattern, which requires careful PCB layout and adequate thermal copper. Confirm the exact pin multiplexing and industrial temperature requirements against the manufacturer documentation before releasing the module for production.
Recommended
Condition Monitoring Sensors
The STM32G4A1KEU6 is suitable for compact condition-monitoring sensors that combine local signal processing, sensor management, and communication in a small assembly. Its 170 MHz Cortex-M4F core provides processing headroom for filtering and control algorithms, while 512 KB of Flash supports firmware, calibration tables, and diagnostic logic. The 32-pin UFQFPN footprint is useful where the enclosure limits component size. Because the verified data does not specify the exact ADC, timer, and communication resources of this orderable device, engineers should confirm those functions in the manufacturer datasheet and validate acquisition timing against the sensor bandwidth before selecting it.
Recommended
Communications Equipment
The STM32G4A1KEU6 can serve as the embedded controller in compact communications equipment requiring a fast 32-bit core and 512 KB of program memory. Its 170 MHz Cortex-M4F architecture is appropriate for protocol processing, packet handling, status reporting, and user-interface control. A 32-pin 5 x 5 mm UFQFPN package also allows the controller to sit close to a communications transceiver and connector, reducing board area. The exact UART, USB, CAN, or other peripheral availability was not supplied in the verified excerpts, so the selected communication interfaces must be checked against the manufacturer device documentation. Clocking, transceiver I/O levels, and firmware protocol support also require design validation.
Recommended
Motor-Control Boards
The STM32G4A1KEU6 is a practical starting point for compact motor-control boards that benefit from a 170 MHz Cortex-M4F core and substantial embedded Flash. The processor can support control-loop computation, current and position management, fault handling, and communications in a single controller. Its 32-pin UFQFPN package can reduce controller-board size, although the exposed pad and high-current power stage must be laid out carefully. Motor-control suitability depends on the exact timer outputs, complementary outputs, analog inputs, and fault-routing resources available on this orderable device, because those pin-specific details were not included in the verified excerpts. Validate them in the manufacturer datasheet and reference design.
Recommended
Portable Instrumentation
The STM32G4A1KEU6 is appropriate for portable instrumentation where a 170 MHz 32-bit processor, 512 KB of Flash, and a compact 5 x 5 mm MCU package are valuable. It can coordinate sensor acquisition, local calculations, display updates, data logging, and configuration management while limiting enclosure size. The Arm Cortex-M4F architecture supports efficient floating-point-oriented control and signal-processing code, while embedded Flash reduces the need for external program storage. The package still requires an exposed-pad-aware footprint and solid ground-plane design. Verify the analog performance, operating-temperature grade, and low-power requirements before using the device as the primary controller of a precision instrument.
Recommended
Digital Power Conversion
The STM32G4A1KEU6 can serve in digital power-conversion modules where real-time control, fault management, and local configuration benefit from a 170 MHz Cortex-M4F core. Its 512 KB of Flash provides capacity for control algorithms, calibration data, telemetry, and firmware update logic. The compact 32-pin UFQFPN package allows the controller to coexist with power-stage components in space-constrained converters. Its exact timer channels, analog comparator resources, DAC functions, and routing to external gate drivers were not established by the supplied data, so those features must be checked for the exact device. Power-layout isolation, exposed-pad grounding, and thermal performance are more important than package size alone.
Recommended
Recommended Products Summary
Engineering reference data for STM32G4A1KEU6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32G431KBT6 | STM32G431K8T6 | STM32G474KBT6 | STM32G474K8T6 | STM32G491KBT6 |
|---|---|---|---|---|---|---|
| Package | 32-UFQFPN (5 x 5 mm) | 32-UFQFPN (5 x 5 mm) | 32-UFQFPN (5 x 5 mm) | 32-UFQFPN (5 x 5 mm) | 32-UFQFPN (5 x 5 mm) | 32-UFQFPN (5 x 5 mm) |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Processor Core | Arm Cortex-M4F | Arm Cortex-M4F | Arm Cortex-M4F | Arm Cortex-M4F | Arm Cortex-M4F | Arm Cortex-M4F |
| Maximum Clock Frequency | 170 MHz | 170 MHz | 170 MHz | 170 MHz | 170 MHz | 170 MHz |
| Flash Memory | 512 KB | 128 KB | 64 KB | 128 KB | 64 KB | 128 KB |
| Product Series | STM32G4 | STM32G4 | STM32G4 | STM32G4 | STM32G4 | STM32G4 |
| Firmware and Peripheral Equivalence | Reference STM32G4A1KEU6 configuration | Requires device-specific pin and peripheral validation | Requires device-specific pin and peripheral validation | Requires device-specific pin and peripheral validation | Requires device-specific pin and peripheral validation | Requires device-specific pin and peripheral validation |
Key Differentiators
- Largest embedded Flash among the listed conditional replacements (vs STM32G431KBT6)
- Substantially more program memory than the K8 variants (vs STM32G474K8T6)
- Higher memory density than the G491 candidate (vs STM32G491KBT6)
Design Notes
Use the official STMicroelectronics 32-pin UFQFPN land pattern rather than reconstructing it from a distributor image. Place the exposed-pad footprint, solder-mask opening, and paste stencil in accordance with the manufacturer package drawing, accounting for the board’s copper and assembly process. The verified records establish a 5 x 5 mm UFQFPN package but do not provide pin numbering or exposed-pad dimensions, so both must be checked in the manufacturer datasheet before PCB release.
Connect the exposed pad to a low-impedance ground plane with short vias placed according to the manufacturer recommendation. This pad is part of the package’s heat-transfer path and electrical connection, not merely a mechanical feature. Route sensitive analog and communication signals away from switching power-stage nodes and high-current return paths. Preserve a continuous return plane where possible and avoid routing sensitive traces beneath the MCU package unless the supported stack-up and reference design explicitly allow it.
Do not treat a shared UFQFPN outline as proof of drop-in compatibility. Verify every power pin, ground pin, boot-configuration pin, reset connection, debug interface, and peripheral multiplexing against the exact replacement device. The listed alternatives reduce Flash from the target’s 512 KB to either 128 KB or 64 KB, so the binary size, bootloader, update mechanism, and diagnostic data must also be checked before production substitution.
Plan the supply rails for the verified 1.8 V, 2.5 V, and 3.3 V operating options, but use the manufacturer’s exact limits for each domain and I/O configuration. Place required bypass capacitors beside the corresponding supply pins, maintain a low-impedance supply path, and keep return currents out of sensitive signal ground paths. Because detailed voltage tolerances, regulator configurations, and decoupling tables were not present in the verified excerpts, obtain those values from the official STM32G4A1KE documentation before schematic release.
Estimate copper and exposed-pad heat spreading before assigning a maximum ambient temperature. The verified data identifies a 170 MHz maximum clock and compact UFQFPN package but does not provide junction temperature, thermal resistance, or power-loss specifications. Calculate worst-case dissipation from the actual clock, core load, IO activity, and supply voltage rather than using an invented thermal figure. Validate the result in the assembled enclosure because airflow, copper area, and adjacent heat sources determine the final junction temperature.
Compliance Information
The supplied verified data contains product, package, memory, frequency, voltage-option, availability, and pricing information but no explicit compliance declarations. Compliance fields remain unknown rather than being inferred from the manufacturer name or product family.
