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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32G051C8U3

Name: STM32G051C8U3
Brand: STMicroelectronics
SKU: STM32G051C8U3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32G051C8U3

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-UFQFN Exposed Pad

Datasheet:: STM32G051C8U3.pdf

Description:: IC MCU 32BIT 64KB FLASH 48UFQFPN

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Product details

Overview

STM32G051C8U3 from STMicroelectronics is a 32-bit Arm® Cortex®-M0+ microcontroller in UFQFPN28 package, featuring 64 KB Flash, 18 KB SRAM, dual 12-bit DACs, 12-bit ADC with hardware oversampling, and operating voltage range of 1.7–3.6 V. It integrates two USARTs (one with LIN/IrDA), two I²C interfaces (Fast-mode Plus), two SPIs, RTC with alarm, and supports -40°C to 105°C industrial temperature range - deployed in smart sensor nodes and battery-powered industrial controllers.

For engineers reviewing the STM32G051C8U3 datasheet, STM32G051C8U3 pinout, STM32G051C8U3 application, or STM32G051C8U3 equivalent, key selection criteria include its 64 MHz max CPU frequency, 5 V-tolerant GPIOs, low-power Stop/Standby modes with RTC wakeup, and dual DAC support for analog signal generation in compact embedded systems.

Technical Context

The STM32G051C8U3 implements an Arm Cortex-M0+ core with MPU, supporting TrustZone-like memory protection via securable flash area and readout protection levels. Its clock system combines 4–48 MHz HSE, 32 kHz LSE with calibration, and internal 16 MHz HSI with PLL for flexible timing control across performance and ultra-low-power modes.

Peripheral interconnect uses a hierarchical AHB/APB bus matrix enabling concurrent DMA transfers and peripheral access without arbitration bottlenecks. The 7-channel DMA controller supports flexible request mapping to peripherals including ADC, SPI, USART, and timers - critical for deterministic real-time data acquisition and communication stacks.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	Arm Cortex-M0+, 64 MHz max - enables real-time control loops with <1 µs interrupt latency and efficient C/C++ execution in resource-constrained designs.
Memory	64 KB Flash (with securable area & protection), 18 KB SRAM (16 KB with HW parity) - supports firmware updates, secure boot, and robust data buffering for sensor fusion or protocol stacks.
Analog Peripherals	12-bit ADC (0.4 µs conversion, up to 16 channels), two 12-bit DACs (low-power sample-and-hold), two rail-to-rail comparators - enables closed-loop analog control, sensor signal conditioning, and waveform generation.
Communication	Two I²C (Fast-mode Plus, 1 Mbit/s), two USART (LIN/IrDA/ISO7816), one LPUART, two SPI (32 Mbit/s) - supports multi-protocol connectivity in industrial gateways and metering devices.
Power Management	Voltage range 1.7–3.6 V; Sleep/Stop/Standby/Shutdown modes; programmable BOR/PVD; VBAT supply for RTC - ensures reliable operation across wide battery and adapter input ranges.
GPIO & Timers	Up to 26 fast I/Os (multiple 5 V-tolerant); 14 timers including two 128 MHz-capable advanced timers, LPTIMs, and watchdogs - delivers precise PWM, encoder interfacing, and time-critical event handling.

Pinout & Package

STM32G051C8U3 is housed in a 28-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 mm × 4 mm, 0.5 mm pitch, with exposed thermal pad - optimized for space-constrained PCB layouts and thermal dissipation in sealed enclosures.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Power supply and ground	Dual power domains: VDD powers digital/analog circuits; VSS provides reference return - requires local 100 nF decoupling per supply pair near pins 1/2 and 27/28.
PA0–PA15, PB0–PB11, PC13–PC15	General-purpose I/O	26 total GPIOs; multiple pins support 5 V-tolerance and external interrupt capability - enables direct interface to legacy sensors, switches, and level-shifted buses.
PA2/PA3, PA9/PA10, PB6/PB7	USART TX/RX, I²C SCL/SDA	Dedicated alternate functions mapped to specific pins - allows simultaneous use of two full-duplex UARTs and one Fast-mode Plus I²C bus without remapping conflicts.
PA4–PA7, PB0–PB1	ADC inputs	10-channel analog input mapping - supports multi-sensor monitoring (e.g., temperature, voltage, current) with hardware oversampling for enhanced resolution.
PA4, PA5	DAC outputs	Two independent 12-bit DAC channels with sample-and-hold - suitable for generating precision bias voltages or analog waveforms in test equipment or actuator drivers.
PC13, PC14, PC15	RTC oscillator, tamper, backup registers	Supports 32.768 kHz crystal connection and battery-backed operation - enables calendar timekeeping and secure state retention during main power loss.

Key Features

Feature	Design Value
Secure Boot & Code Protection	Readout protection (RDP) levels + securable flash area - prevents firmware extraction and unauthorized code modification in field-deployed devices.
Low-Power Operation	Standby mode current <180 nA (typ.) with RTC running on VBAT - extends battery life to years in wireless sensor endpoints.
High-Accuracy Timing	32 kHz LSE oscillator with factory calibration ±10 ppm - eliminates need for external trimming capacitors in RTC applications.
DMA-Driven Peripherals	7-channel DMA with DMAMUX routing - offloads CPU from data movement tasks (e.g., ADC→SRAM→SPI transmission), reducing active time and power consumption.
Robust I/O Interface	Multiple 5 V-tolerant pins with ESD protection >4 kV HBM - simplifies integration with industrial-level 5 V logic and reduces external protection component count.

Applications

Smart Energy Metering

Industrial Sensor Node

Use Scenario: Bidirectional energy measurement with tariff switching, tamper detection, and secure data logging over PLC or RF links.

IC Role / Device Role / Timing Role: Main MCU executing metrology algorithms, managing EEPROM/Flash storage, driving LCD segments, and synchronizing sampling via hardware-triggered ADC/DMA.

Use Value: Dual DACs generate reference voltages for anti-tamper analog monitoring; RTC with VBAT maintains billing calendar during mains outage.

Use Scenario: Wireless vibration/temperature/humidity monitoring in predictive maintenance systems with edge preprocessing before LoRaWAN upload.

IC Role / Device Role / Timing Role: Real-time sensor fusion hub coordinating ADC sampling, FFT computation, and low-power UART-to-LoRa bridge via LPUART wakeup.

Use Value: 128 MHz-capable timers enable precise timestamping of accelerometer events; Stop mode with RTC alarm achieves sub-µA average current between readings.

Programmable Logic Controller (PLC) I/O Module

Medical Diagnostic Handheld

Use Scenario: DIN-rail mounted digital I/O expansion module with isolated inputs/outputs, Modbus RTU over RS-485, and local diagnostics.

IC Role / Device Role / Timing Role: Protocol processor handling Modbus framing, CRC calculation, and GPIO state scanning at configurable scan rates using timer-triggered DMA bursts.

Use Value: Two USARTs support simultaneous RS-485 (Modbus) and debug UART; CRC unit accelerates frame validation without CPU overhead.

Use Scenario: Portable blood glucose or ECG analyzer requiring analog front-end control, display refresh, button interface, and USB-C charging negotiation.

IC Role / Device Role / Timing Role: System-on-chip managing analog signal chain (ADC/DAC/comparators), OLED driver timing, and USB PD policy engine via LPUART.

Use Value: Dual 12-bit DACs calibrate sensor offsets; 5 V-tolerant GPIOs directly drive tactile feedback actuators without level shifters.

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32G071CBT6	64 KB Flash, 36 KB SRAM, LQFP48 package, adds USB 2.0 FS device, more GPIOs (38)	Requires larger PCB footprint and USB PHY components; better suited for host-facing devices needing HID or CDC classes	Select when USB connectivity or expanded RAM for RTOS stacks is required; not drop-in due to pin count and package mismatch.
STM32L051C8T6	192 KB Flash, 20 KB RAM, same UFQFPN28, but Cortex-M0, lower max frequency (32 MHz), higher active current	Optimized for ultra-low-power sleep-dominated operation; lacks DACs and has reduced analog feature set	Choose only if sub-µA standby is paramount and DAC/advanced timer features are unnecessary - trade-offs in analog capability and compute throughput.

Compared with STM32G051C8U3, STM32G071CBT6 offers USB and memory headroom at cost of size and complexity, while STM32L051C8T6 sacrifices analog richness and speed for deeper sleep efficiency - making the G051 optimal for balanced mixed-signal control in compact industrial modules.

Availability

STM32G051C8U3 is available at Aetrix Electronics and suitable for smart metering, industrial sensor nodes, PLC I/O modules, and portable medical diagnostics requiring stable component supply, long-term lifecycle assurance, and ECOPACK2-compliant packaging.

Supply support for STM32G051C8U3 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 ICs, MEMS, and automotive semiconductors since 1987.

The STM32G0 series targets cost-sensitive, space-constrained general-purpose embedded applications - delivering Cortex-M0+ performance with enhanced analog integration, security primitives, and ultra-low-power modes for next-generation industrial and consumer IoT endpoints.

FAQ

What is the maximum operating frequency and voltage range of the STM32G051C8U3?

The STM32G051C8U3 operates at up to 64 MHz CPU frequency with a supply voltage range of 1.7 V to 3.6 V. This range supports direct Li-ion battery (3.0–3.6 V) and coin-cell (1.7–3.0 V) operation without external regulators, and its internal voltage regulator maintains stable core voltage across the full range.

Does the STM32G051C8U3 support hardware cryptographic acceleration?

No, the STM32G051C8U3 does not include dedicated cryptographic accelerators such as AES or SHA engines. It relies on software libraries for encryption; however, it provides true random number generation (TRNG) via its analog noise source and supports secure boot with readout protection and securable flash areas for firmware integrity.

How many analog-to-digital converter (ADC) channels does the STM32G051C8U3 support, and what is its resolution?

The STM32G051C8U3 integrates a single 12-bit ADC with up to 16 external input channels and hardware oversampling capability that extends effective resolution to 16 bits. Conversion time is 0.4 µs, and the ADC supports programmable sampling times, injected/conversion sequences, and DMA-triggered data transfer for continuous acquisition.

Can the STM32G051C8U3 be programmed via SWD using standard debug probes?

Yes, the STM32G051C8U3 supports Serial Wire Debug (SWD) via dedicated SWCLK and SWDIO pins (PA14/PA13), compatible with ST-LINK/V2, J-Link, and CMSIS-DAP debuggers. It also supports bootloader activation via USART1 using the system memory, enabling field firmware updates without debug hardware.

STM32G051C8U3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-UFQFN Exposed Pad

Series:: STM32G0

Packaging:: Tray

Product Status:: Active

Programmable:: -

Core Processor:: ARM® Cortex®-M0+

Core Size:: 32-Bit

Speed:: 64MHz

Connectivity:: I2C, IrDA, LINbus, SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, DMA, I2S, POR, PWM, WDT

Number of I/O:: 44

Program Memory Size:: 64KB (64K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 18K x 8

Voltage - Supply (Vcc/Vdd):: 1.7V ~ 3.6V

Data Converters:: A/D 19x12b SAR; D/A 2x12b

Oscillator Type:: External, Internal

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32G051C8U3 FAQ

1.How can I place an order for STM32G051C8U3 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32G051C8U3 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 STM32G051C8U3 reliable?

The price and inventory of STM32G051C8U3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32G051C8U3 is usually 5 days.

3.What payment methods are accepted for STM32G051C8U3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32G051C8U3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32G051C8U3?

STM32G051C8U3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32G051C8U3 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 STM32G051C8U3?

For technical support, including STM32G051C8U3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32G051C8U3 requirements.

6.How does Aetrix verify that STM32G051C8U3 is sourced from the original manufacturer or authorized distributors?

All STM32G051C8U3 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 STM32G051C8U3 meets industry standards.

7.What is the process for return or replacement of STM32G051C8U3?

All STM32G051C8U3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32G051C8U3, 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 STM32G051C8U3 part is unused and in its original packaging.

Return procedure for STM32G051C8U3:

1.Submit a request within 90 days.

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

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