STM32G031K8U6 - 64MHz Cortex-M0+ 64KB MCU | STMicroelectronics
MPN: STM32G031K8U6 ✓ Active| Qty | Unit Price | Extended |
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| 1 | $1.1811 | $1.18 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
STM32G031K8U6 Overview
A microcontroller is a programmable integrated circuit containing a processor core, memory, and peripherals on one device. STM32G0 belongs to the embedded processor and microcontroller hierarchy, where the Arm Cortex-M0+ core executes compact control firmware, Flash retains program code, SRAM supports working data, and integrated peripherals reduce the component count required for sensing, communication, timing, and actuator control.
The verified product information identifies a 64 MHz Arm Cortex-M0+ core, 64 KB Flash organized as 64K x 8 bits, 8 KB SRAM, and a 32-pin UFQFPN package. The listed interface set includes two USART peripherals. Related family documentation also identifies I2C, SPI, IrDA, and LIN connectivity, DMA, brown-out detection and reset, PWM, a watchdog timer, and hardware SRAM parity checking, subject to the exact device variant and pin availability.
STM32G031K8U6 is positioned for cost-sensitive embedded systems where a 64 MHz core provides useful performance headroom while retaining 64 KB of nonvolatile program storage. Its compact 5 x 5 mm land pattern supports space-constrained boards, and the mixture of serial interfaces, timing peripherals, and analog functions makes it suitable for sensor hubs, building controls, appliance controllers, and compact automation modules.
Typical designs place the MCU beside sensors and power-conversion circuitry, using its serial interfaces for external converters, displays, or network modules. Firmware must be built and programmed through a supported Arm/ST development environment. Before hardware release, engineers should verify the exact pin multiplexing, peripheral limits, clock tree, and electrical constraints against the official STM32G031K8 documentation.
The principal design consideration is not simply matching the 5 x 5 mm footprint but confirming device-level compatibility. Firmware, package pinout, supply voltage, peripheral configuration, and all used I/O assignments must align with the replacement. This page distinguishes verified STM32G0 family options from parts with different package, memory, or peripheral configurations.
This page combines exact distributor and manufacturer identifiers, verified memory and core specifications, package information, commercial availability references, and application-focused engineering guidance. It also documents the shortage of independently verified, pin-compatible drop-in replacements rather than presenting electrically similar MCUs as drop-in substitutes.
Drop-in alternatives for STM32G031K8U6 — 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 STM32G031K8U6 (same form factor and footprint) — differing in Flash Memory, Package, Timers, ADC Resolution, Communication Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
STM32G031K6U6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32G031G8U6
✅ Drop-In✓ In Stock
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View Datasheet →STM32F038G6U6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32G0B1CEU6
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STM32F031K6U6
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View Datasheet →STM32G031K8U6 Maximum Ratings & Electrical Characteristics
| Product Type | Arm Cortex-M0+ 32-bit microcontroller |
| Series | STM32G0 |
| Maximum Core Frequency | 64 MHz |
| CPU Instruction Set | 32-bit Arm Cortex-M0+ |
| Flash Memory | 64 KB (64K x 8 bits) |
| Static RAM | 8 KB |
| SRAM Hardware Parity Check | Supported |
| Package | 32-pin UFQFPN, 5 x 5 mm |
| USART Count | 2 |
| Peripheral Interfaces Listed | I2C, IrDA, LINbus, SPI, UART/USART |
| DMA | Supported |
| Brown-Out Detection and Reset | Supported |
| Timers | PWM and watchdog functions supported |
| Operating Temperature Options | -40C to 85C, 105C, or 125C, depending on device variant |
| Flash Protection and Securable Area | Supported |
| Mounting Type | Surface mount |
STM32G031K8U6 32-pin ufqfpn, 5 x 5 mm Pin Configuration Guide
Pin configuration for STM32G031K8U6 (32-pin ufqfpn, 5 x 5 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 STM32G031K8U6.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32G031K8U6 is suitable for 6 applications: Compact Sensor and Control Hub, Building Automation Controller, Appliance and Smart-Home Interface, Communication Module, Battery-Powered Portable Device, Measurement and Diagnostic Module.
Compact Sensor and Control Hub
The STM32G031K8U6 fits a compact sensor hub because its 64 MHz Arm Cortex-M0+ core provides responsive control processing while 64 KB of Flash and 8 KB of SRAM accommodate embedded firmware and working data. The listed I2C and SPI connectivity can connect sensors, transceivers, or local storage in a 5 x 5 mm footprint. Design the bus for the voltage and signal levels required by each peripheral, and verify which alternate functions remain available after assigning every pin.
Recommended
Building Automation Controller
A building-control module can use the STM32G031K8U6 to coordinate sensors, communication links, and actuator commands within a compact board. Its 64 MHz processing rate supports responsive control tasks, while the listed I2C, SPI, UART/USART, IrDA, and LINbus options provide multiple paths for local sensors and network transceivers. Firmware should include watchdog recovery and validate timing margins under the worst communication and fault conditions.
Recommended
Appliance and Smart-Home Interface
The STM32G031K8U6 is suitable for appliance user interfaces and smart-home nodes that combine local buttons, indicators, sensors, and serial communications. Its 8 KB SRAM supports event buffering and control state, while 64 KB Flash provides room for protocol and application firmware. The 32-pin UFQFPN also helps preserve board area, although exposed-pad thermal design and pin multiplexing must follow the official package drawing.
Recommended
Communication Module
The two listed USART peripherals make the STM32G031K8U6 a practical controller for compact serial communication equipment. A design can allocate one interface to a wireless or network module and another to diagnostics, logging, or an external sensor. The 64 MHz Cortex-M0+ core can service protocol tasks, and the listed DMA support may reduce interrupt overhead, but pin assignment, baud-rate accuracy, buffer depth, and peripheral availability must be confirmed for the exact package.
Recommended
Battery-Powered Portable Device
STM32G031K8U6 can serve as the control device in a battery-powered portable product when its active and low-power operating points satisfy the product's energy budget. The supplied verified data confirms the 64 MHz core and memory configuration but does not provide current-consumption figures, so battery life cannot be inferred from those specifications. Measure sleep, wake, and processing currents on the intended board, and configure peripherals to remain unpowered when practical.
Recommended
Measurement and Diagnostic Module
The STM32G031K8U6 can coordinate measurements and service diagnostics in compact instrumentation. Its serial interfaces allow connection to sensors, displays, or a host computer, while PWM and timing resources can support stimulus generation and control loops. Designers should establish analog and digital grounding, filtering, calibration, and fault-detection practices around the MCU. Exact ADC performance, timer channels, and alternate-function routing must be taken from the official datasheet.
Recommended
Recommended Products Summary
Engineering reference data for STM32G031K8U6 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32G031K6U6 | STM32G031G8U6 | STM32F038G6U6 | STM32G0B1CEU6 | STM32F031K6U6 |
|---|---|---|---|---|---|---|
| Package | 32-pin UFQFPN, 5 x 5 mm | 32-pin UFQFPN, 5 x 5 mm | 32-pin UFQFPN, 5 x 5 mm | Tray package; exact dimensions not supplied | 32-pin UFQFPN, 5 x 5 mm | 32-pin UFQFPN, 5 x 5 mm |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
Key Differentiators
- Higher verified maximum clock than the compared STM32F030K6T6 (vs STM32F030K6T6)
- Twice the listed Flash memory of STM32F030K6T6 (vs STM32F030K6T6)
- Four more listed I/O positions than STM32F030K6T6 (vs STM32F030K6T6)
Design Notes
Do not treat a related STM32 family member as a drop-in replacement merely because it uses the same core family or has a similarly named 32-pin package. Verify every exposed pad, supply pin, ground connection, alternate-function route, peripheral instance, clock requirement, and programming interface against the exact ordering-code datasheet. The supplied cross-reference results establish candidates for review, but not complete electrical or firmware equivalence.
Place decoupling and grounding to satisfy the official STM32G031K8 layout guidance before assigning board area to other functions. The supplied data confirms a 32-pin 5 x 5 mm UFQFPN package but does not provide the full pin table, exposed-pad dimensions, or recommended land pattern. Obtain those details from the official package drawing and preserve short return paths for high-speed and communication signals.
Power-domain design must account for every peripheral used by the firmware, not only the nominal MCU supply. The verified data confirms 64 MHz operation, two USARTs, DMA, and multiple serial interfaces, but it does not provide operating-current limits or regulator recommendations. Measure current across startup, idle, communications, and maximum peripheral activity, then size the supply and local decoupling from the official electrical characteristics and transient requirements.
Assign pins only after creating a complete peripheral and package conflict matrix. The target supports I2C, SPI, UART/USART, IrDA, LINbus, PWM, and DMA according to the supplied Octopart comparison, but the exact number and routing of signals on the 32-pin package are not supplied here. Confirm pin multiplexing and peripheral instance mappings in the official datasheet and alternate-function tables before schematic capture.
Compliance Information
The supplied verified snippets did not provide definitive compliance declarations for STM32G031K8U6. Compliance must be confirmed using the current STMicroelectronics product documentation and applicable declarations.
