STMicroelectronics STM32G051C8U7

Overview

STM32G051C8U7 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 16 external channels, and operating voltage range of 1.7–3.6 V. It integrates two USARTs (one with ISO7816/LIN/IrDA), two I²C interfaces (Fast-mode Plus), two SPIs, RTC with alarm, and supports -40°C to 85°C ambient operation - deployed in industrial sensor nodes and smart metering front-ends.

For engineers reviewing the STM32G051C8U7 datasheet, STM32G051C8U7 pinout, STM32G051C8U7 application, or STM32G051C8U7 equivalent, key selection criteria include its 28-pin UFQFPN footprint, dual DAC support for analog output generation, 14-timer suite including LPTIMs for ultra-low-power wakeups, and hardware parity on 16 KB of SRAM for functional safety-critical firmware execution.

Technical Context

The STM32G051C8U7 implements an Arm Cortex-M0+ core with MPU, running at up to 64 MHz via internal 16 MHz RC + PLL or external 4–48 MHz crystal. Its memory subsystem includes securable Flash with readout protection and 18 KB SRAM (16 KB with hardware parity), enabling certified firmware integrity checks.

Peripherals are interconnected via AHB/APB buses with DMA routing flexibility: 7-channel DMA controller supports configurable request mapping, while the 12-bit ADC achieves 0.4 µs conversion time across 16 external inputs and internal references (VREFINT, temperature sensor, VBAT). Two rail-to-rail comparators and dual low-power DACs enable closed-loop analog control without external components.

Key Specifications

Pinout & Package

STM32G051C8U7 is housed in a 28-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 mm × 4 mm body, 0.5 mm pitch, exposed thermal pad. Pin assignments conform to ST's standard STM32G051x8 pinout for this package variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32G051C8U7, the G031F8P6 sacrifices DACs and memory for lower cost in simpler control roles, while the G071CBT6 expands Flash/SRAM and I/O count at the expense of larger footprint - making the C8U7 the optimal balance of analog capability, compactness, and embedded firmware headroom.

Availability

STM32G051C8U7 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart energy metering, medical wearable patches, and home appliance control panels requiring stable component supply across long-lifecycle deployments.

Supply support for STM32G051C8U7 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, sensors, and automotive-grade components since 1987.

The STM32G0 series targets cost-sensitive, ultra-low-power embedded applications demanding high integration, security features, and rapid time-to-market - optimized for IoT edge devices, consumer electronics, and industrial controls.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32G051C8U7 achieves a maximum CPU frequency of 64 MHz using its internal 16 MHz RC oscillator combined with a programmable PLL multiplier. Alternatively, an external 4–48 MHz crystal can feed the PLL for higher precision timing. The system clock tree supports dynamic switching between sources during runtime for power/performance trade-offs.

Does STM32G051C8U7 support hardware encryption or secure boot?

It does not integrate dedicated cryptographic accelerators (AES, SHA, PKA), but supports secure boot via readout protection (RDP) Level 1/2, securable Flash area, and option bytes configuration. Secure firmware updates require external trusted execution environment or companion secure element - ST recommends pairing with STSAFE-A110 for certified secure boot in regulated markets.

Can the two DAC outputs be synchronized for differential analog generation?

Yes - both DAC1 and DAC2 share a common trigger source (TIM2/TRGO, EXTI line, software) and support simultaneous update mode. When configured with identical alignment and trigger settings, their outputs update within one APB clock cycle, enabling true differential signaling or matched analog stimulus for sensor excitation or audio biasing.

What is the minimum supply voltage for reliable RTC operation with VBAT?

The RTC operates reliably down to 1.65 V on VBAT, maintaining calendar, alarm, and backup registers. With typical coin-cell batteries (CR2032, ~3 V nominal), the RTC sustains >10 years of continuous operation. VBAT must be decoupled with ≥100 nF ceramic capacitor placed near the VBAT pin to suppress noise-induced resets.