STMicroelectronics STM32F102C6T6A

Overview

STM32F102C6T6A from STMicroelectronics is a 32-bit Arm® Cortex®-M3 microcontroller in LQFP48 package, featuring 32 KB Flash, 6 KB SRAM, USB 2.0 Full-Speed interface, 12-bit ADC (16-channel), and five timers-including two 16-bit general-purpose timers with PWM capability-designed for embedded USB-connected industrial sensors and human-interface devices.

For engineers reviewing the STM32F102C6T6A datasheet, STM32F102C6T6A pinout, STM32F102C6T6A application, or STM32F102C6T6A equivalent, key selection considerations include USB FS PHY integration, 48 MHz CPU clock with zero-wait-state Flash execution, 5 V-tolerant I/Os (37/51 pins), and support for low-power Stop/Standby modes with RTC backup via VBAT.

Technical Context

The STM32F102C6T6A implements an Arm Cortex-M3 core with Harvard architecture, single-cycle multiplier, and hardware divide unit, executing code at up to 48 MHz with 1.25 DMIPS/MHz performance. Its clock system integrates a 4–16 MHz external crystal oscillator, factory-trimmed 8 MHz RC, 40 kHz RC, PLL for CPU clock generation, and dedicated 32 kHz oscillator for RTC calibration.

Peripheral subsystems include a 7-channel DMA controller servicing timers, ADC, SPI, I²C, and USARTs; nested vectored interrupt controller (NVIC) supporting 64 interrupts; and memory-mapped peripherals accessible via AHB/APB buses. The device supports full USB 2.0 FS protocol stack offload via integrated transceiver and endpoint buffers.

Key Specifications

Pinout & Package

LQFP48 package, 7 × 7 mm body, 0.5 mm pitch, exposed pad (EP) not electrically connected. RoHS-compliant ECOPACK® construction with standard reflow profile compatibility.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 32-bit USB-capable microcontroller applications.

Compared with STM32F072CBT6, the STM32F102C6T6A delivers superior interrupt latency and deterministic real-time behavior due to Cortex-M3 architecture, while versus STM32F103C8T6 it offers optimized cost/power for USB-only use cases without over-provisioned memory or unused CAN hardware.

Availability

STM32F102C6T6A is available at Aetrix Electronics and suitable for USB-connected industrial sensors, programmable logic controller I/O modules, smart power outlets, and human interface devices requiring stable component supply across multi-year production cycles.

Supply support for STM32F102C6T6A 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 sensors, and automotive-grade components since 1987.

The STM32F102x6 series belongs to ST's USB Access Line-a cost-optimized, low-density MCU family targeting resource-constrained embedded systems requiring native USB connectivity without external PHY components.

FAQ

Does STM32F102C6T6A support USB device enumeration without external components?

Yes. The device integrates a full-speed USB 2.0 transceiver with internal pull-up resistors on DP and calibrated slew-rate control. PA11 (DM) and PA12 (DP) connect directly to the USB connector; no external resistors, capacitors, or transceivers are required for basic HID or CDC device enumeration on Windows, macOS, or Linux hosts.

What is the maximum operating temperature range for industrial use?

The STM32F102C6T6A is qualified for industrial temperature range: –40 °C to +85 °C. Electrical characteristics-including Flash read/write endurance, ADC accuracy, and USB timing margins-are fully specified across this range per ST's DS5934 Rev 6 datasheet, Section 5.3.1.

Can the internal 8 MHz RC oscillator be used as system clock without external crystal?

Yes. The factory-trimmed 8 MHz RC oscillator achieves ±1% accuracy over temperature and voltage, sufficient for UART communication (up to 115.2 kbps) and non-critical timing. For USB FS operation or precise RTC calibration, however, an external 4–16 MHz crystal or 32.768 kHz LSE crystal is mandatory per Section 2.3.7 and Figure 2 of the datasheet.

How many GPIO pins support external interrupt capability?

Up to 16 external interrupt lines (EXTI0–EXTI15) are available, each configurable to trigger on rising/falling edges or both. All 37 5 V-tolerant GPIOs (PA0–PA15, PB0–PB15, PC13–PC15) can be mapped to these lines, enabling wake-from-Stop on any supported pin per Section 2.3.6 and Table 4 of DS5934 Rev 6.