STMicroelectronics STM32F101C8U6

Overview

STM32F101C8U6 from STMicroelectronics is a 32-bit ARM Cortex-M3 microcontroller in UFQFPN48 package, featuring 64 KB Flash, 10 KB SRAM, 36 MHz max CPU frequency, 12-bit ADC with 16 channels, and seven communication interfaces including up to 3 USARTs, 2 I²C, and 2 SPI. It targets cost-sensitive industrial control and sensor node applications requiring integrated analog sensing and multi-protocol connectivity.

For engineers reviewing the STM32F101C8U6 datasheet, STM32F101C8U6 pinout, STM32F101C8U6 application, or STM32F101C8U6 equivalent, key selection considerations include its 48-pin ultra-thin QFN footprint, 2.0–3.6 V supply range, 5 V-tolerant I/Os, RTC with VBAT support, and SWD/JTAG debug interface for embedded firmware development.

Technical Context

The STM32F101C8U6 implements an ARM Cortex-M3 core with Harvard architecture, single-cycle multiplication, and hardware divide, executing at up to 36 MHz with 1.25 DMIPS/MHz performance. Its clock system integrates a 4–16 MHz external crystal oscillator, 8 MHz factory-trimmed RC, 40 kHz LSI RC, and PLL for flexible CPU and peripheral clock derivation.

Peripheral integration includes a 7-channel DMA controller servicing timers, ADC, SPI, I²C, and USART; nested vectored interrupt controller (NVIC) supporting 68 interrupts; and low-power modes (Sleep, Stop, Standby) with VBAT-backed RTC and backup registers for energy-constrained operation.

Key Specifications

Pinout & Package

UFQFPN48 (Ultra Thin Fine Pitch Quad Flat No-lead), 7 × 7 mm body, 0.5 mm lead pitch, exposed thermal pad. Designed for high-density routing and improved thermal dissipation in industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32F101C8U6, the STM32F030F4P6 offers lower gate count and cost but sacrifices RTC, temperature sensing, and ADC resolution; the STM32F103C8T6 retains full pin compatibility while adding memory headroom and USB - making it suitable for future-proofed designs needing expansion.

Availability

STM32F101C8U6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart meter interfaces, PLC I/O modules, and home automation controllers requiring stable component supply and long-term manufacturability.

Supply support for STM32F101C8U6 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 management ICs, MEMS, and automotive semiconductors.

The STM32F101xx series belongs to ST's medium-density access line - engineered for cost-optimized industrial and consumer applications demanding balanced performance, analog integration, and low-power operation without USB or advanced connectivity.

FAQ

What is the maximum operating temperature range for STM32F101C8U6?

The STM32F101C8U6 is rated for industrial temperature operation from –40°C to +85°C. This range is validated per ST's electrical characteristics testing in Section 5.3.1 of the datasheet, covering all core, memory, and peripheral functionality including ADC linearity, timer accuracy, and I/O drive strength under thermal stress.

Does STM32F101C8U6 support in-application programming (IAP)?

Yes, the STM32F101C8U6 supports IAP via its embedded bootloader and Flash memory write/erase capabilities. The device allows firmware updates from internal RAM or external interfaces (e.g., USART) by unlocking Flash, erasing sectors, and reprogramming - all under application control without external programmer.

Can the internal 8 MHz RC oscillator be used as the system clock source?

Yes, the 8 MHz factory-trimmed HSI RC oscillator can serve as the system clock source directly or feed the PLL. It achieves ±1% accuracy over temperature and voltage, sufficient for UART communication at 9600–115200 baud without external crystal - reducing BOM cost in non-precision timing applications.

Is the UFQFPN48 package RoHS-compliant and lead-free?

Yes, the STM32F101C8U6 in UFQFPN48 package is RoHS-compliant and lead-free per STMicroelectronics' ECOPACK® initiative. The device meets EU Directive 2011/65/EU and carries the "RoHS Compliant" marking on its top-side laser marking, with full material declarations available in ST's product change notifications.