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

STMicroelectronics STM32F103C6T7ATR

Name: STM32F103C6T7ATR
Brand: STMicroelectronics
SKU: STM32F103C6T7ATR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32F103C6T7ATR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-LQFP

Datasheet:: STM32F103C6T7ATR.pdf

Description:: IC MCU 32BIT 32KB FLASH 48LQFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

STM32F103C6T7ATR from STMicroelectronics is a low-density performance-line ARM Cortex-M3 microcontroller featuring 32 KB Flash, 10 KB SRAM, 72 MHz CPU clock, USB 2.0 full-speed interface, and CAN 2.0B Active support - deployed in industrial motor control, sensor node firmware, and embedded HMI front-ends.

For engineers reviewing the STM32F103C6T7ATR datasheet, STM32F103C6T7ATR pinout, STM32F103C6T7ATR application, or STM32F103C6T7ATR equivalent, key selection factors include its 48-pin UFQFPN package, dual 12-bit ADCs with temperature sensor, 6 communication interfaces (including LIN-capable USARTs), and SWD/JTAG debug support for rapid firmware iteration.

Technical Context

The STM32F103C6T7ATR implements an ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, hardware divide, and nested vectored interrupt controller (NVIC) supporting up to 60 interrupts. Its clock system integrates 4–16 MHz external crystal oscillator, 8 MHz factory-trimmed internal RC, 40 kHz LSI, and PLL for scalable 72 MHz operation.

Peripheral integration includes two 12-bit, 1 µs ADCs (16-channel total), 7-channel DMA controller servicing timers/ADC/SPI/I²C/USART, six timers (two general-purpose 16-bit, one motor-control PWM with dead-time, two watchdogs, SysTick), and full-featured USB 2.0 FS + CAN 2.0B transceivers sharing dedicated I/O routing.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	ARM Cortex-M3, 72 MHz max - enables real-time deterministic execution of control loops at ≤13.9 ns instruction cycle time.
Flash / SRAM	32 KB Flash / 10 KB SRAM - supports medium-complexity firmware with bootloader, USB stack, and sensor fusion algorithms.
ADC	2 × 12-bit, 1 µs conversion - allows simultaneous sampling of analog sensors (e.g., current/voltage/temperature) in motor drive feedback paths.
Communication	1×I²C, 2×USART (LIN/IRDA/ISO7816), 1×SPI (18 Mbit/s), 1×CAN 2.0B, 1×USB 2.0 FS - enables multi-protocol fieldbus connectivity without external transceivers.
Timers	6 timers including motor-control PWM with dead-time generation - directly drives 3-phase inverter gate drivers with hardware fault protection.
Debug	SWD + JTAG - provides non-intrusive real-time debugging and flash programming via standard ARM CMSIS-DAP probes.
Supply Range	2.0–3.6 V - compatible with single Li-ion or regulated 3.3 V systems; includes programmable voltage detector (PVD) for brown-out management.

Pinout & Package

STM32F103C6T7ATR uses a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for compact industrial PCBs requiring high I/O density and thermal efficiency.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Power supply / Ground	Dual 3.3 V supply pins per side - decoupling required within 10 mm for stable 72 MHz operation and ADC accuracy.
PA0–PA15, PB0–PB15, PC13–PC15	General-purpose I/O	42 GPIOs (51 total, 9 reserved); all 5 V-tolerant except analog inputs - enable direct interfacing with legacy 5 V logic or sensors.
PA9/PA10	USB DM/DP	Dedicated full-speed USB differential pair - requires 1.5 kΩ pull-up on DP for device enumeration; no external PHY needed.
PB8/PB9	CAN RX/TX	Direct CAN 2.0B physical layer interface - connects to external CAN transceiver (e.g., TJA1050) with minimal trace length for EMC robustness.
PA11/PA12	USB DM/DP (alternate)	Remappable USB pins - allows flexible PCB layout when primary PA9/PA10 conflict with other peripherals.
NRST	Active-low reset	Asynchronous reset input with internal pull-up - accepts 100 ns minimum pulse width; supports external push-button or supervisor IC reset assertion.

Key Features

Feature	Design Value
Embedded CRC unit	Hardware-accelerated 32-bit CRC calculation - validates firmware integrity during OTA updates or boot-time image checksumming.
Temperature sensor	Integrated calibrated sensor (±1.5°C accuracy) connected to ADC1_IN16 - enables board-level thermal monitoring without external components.
Low-power modes	Sleep/Stop/Standby with VBAT backup for RTC - achieves ≤1.7 µA Standby current (with RTC active), extending battery life in remote sensor nodes.
Programmable voltage detector	Configurable threshold (2.2–2.9 V) with interrupt output - triggers graceful shutdown or data save before brown-out in unregulated power environments.
96-bit unique ID	Factory-programmed serial number - used for secure device authentication, license binding, or cryptographic key derivation in IoT edge devices.

Applications

Industrial Motor Control

Smart Sensor Node

Use Scenario: 3-phase BLDC motor drive in HVAC fan module with Hall-effect commutation and overcurrent protection.

IC Role / Device Role / Timing Role: Main controller executing FOC algorithm, generating 6-channel complementary PWM with dead-time, sampling current via dual ADCs, and communicating status via CAN bus.

Use Value: Integrated motor-control timer eliminates need for external gate driver logic; CAN+USB dual-interface enables both fieldbus integration and service port access.

Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ using I²C and analog sensors.

IC Role / Device Role / Timing Role: Data acquisition hub managing sensor polling, ADC conversions, low-power RTC wakeups, and USB-based configuration/data dump.

Use Value: 10 KB SRAM buffers sensor logs between USB transfers; Stop mode with RTC consumes <2 µA, enabling >2-year coin-cell operation.

Human-Machine Interface

Automotive Diagnostic Tool

Use Scenario: Touch-enabled display panel for industrial PLC with button feedback, LED indicators, and buzzer alerts.

IC Role / Device Role / Timing Role: UI processor handling capacitive touch scanning (via GPIO capacitance measurement), driving LEDs/buzzer via PWM, and communicating with host PLC via USART.

Use Value: 42 GPIOs support direct matrix keypad + LED array; hardware USART LIN mode simplifies connection to automotive diagnostic networks.

Use Scenario: Handheld OBD-II scanner reading engine parameters and DTCs from vehicle ECU via CAN bus.

IC Role / Device Role / Timing Role: CAN protocol interpreter with USB CDC interface - receives CAN frames, parses UDS messages, and forwards results to PC via virtual COM port.

Use Value: On-chip CAN controller handles bit timing, error framing, and message filtering; USB 2.0 FS enables plug-and-play PC connectivity without external bridge ICs.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32F103C8T6	64 KB Flash, 20 KB SRAM, same pinout and peripherals - larger memory footprint with identical UFQFPN48 package.	Supports more complex USB HID device stacks or dual-CAN applications requiring additional code space.	Select when firmware size exceeds 32 KB or future-proofing for feature expansion is required; otherwise, C6T7ATR offers optimal cost/memory balance.
STM32F030F4P6	ARM Cortex-M0, 16 MHz max, 16 KB Flash, no CAN/USB - smaller die, lower cost, LQFP20 package.	Limited to basic UART/I²C sensor nodes or simple actuator control without fieldbus or high-speed connectivity.	Choose only for ultra-low-cost, low-performance applications where CAN/USB are unnecessary; lacks critical features for industrial comms.

Compared with STM32F103C8T6, the C6T7ATR trades 32 KB Flash headroom for lower BOM cost and power; versus STM32F030F4P6, it delivers 4.5× higher CPU throughput, full USB/CAN, and dual ADCs - making it the minimum viable MCU for interoperable industrial edge devices.

Availability

STM32F103C6T7ATR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, human-machine interfaces, and automotive diagnostic tools requiring stable component supply across long-lifecycle production programs.

Supply support for STM32F103C6T7ATR 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, designing and manufacturing microcontrollers, power management ICs, MEMS sensors, and automotive-grade silicon.

The STM32F103x6 series targets cost-sensitive industrial and consumer embedded systems requiring ARM Cortex-M3 performance, USB/CAN connectivity, and robust peripheral integration - balancing computational capability with production scalability.

FAQ

What is the maximum operating frequency and associated power consumption?

The STM32F103C6T7ATR operates at up to 72 MHz with typical active current of 36 mA at 3.3 V and 72 MHz (code running from Flash, all peripherals enabled). At 8 MHz, current drops to ~12 mA. These values are measured per datasheet conditions (DocID15060 Rev 7, Table 13) and assume proper decoupling and PCB layout.

Does this part include an integrated USB transceiver?

Yes - the STM32F103C6T7ATR integrates a full-speed (12 Mbit/s) USB 2.0 transceiver with internal pull-up resistors and differential signaling circuitry. It requires only external 1.5 kΩ pull-up on DP for device enumeration and complies with USB specification without external PHY components.

How many ADC channels are accessible in the UFQFPN48 package?

In the UFQFPN48 package, 10 ADC channels are physically accessible: ADC1_IN0–IN9 mapped to PA0–PA7, PB0–PB1. Channels IN10–IN15 (e.g., temperature sensor on IN16) are internally routed and do not require external pins - enabling on-die thermal monitoring without additional connections.

Is the CAN interface compatible with ISO 11898-2 physical layer?

No - the STM32F103C6T7ATR contains only the CAN protocol controller (bxCAN), not the physical transceiver. It requires an external ISO 11898-2 compliant transceiver (e.g., TJA1050 or SN65HVD230) connected to PB8 (RX) and PB9 (TX) to achieve full CAN bus compliance and ESD protection.

STM32F103C6T7ATR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-LQFP

Series:: STM32F1

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M3

Core Size:: 32-Bit Single-Core

Speed:: 72MHz

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

Peripherals:: DMA, Motor Control PWM, PDR, POR, PVD, PWM, Temp Sensor, WDT

Number of I/O:: 37

Program Memory Size:: 32KB (32K x 8)

Program Memory Type:: FLASH

EEPROM Size:: -

RAM Size:: 10K x 8

Voltage - Supply (Vcc/Vdd):: 2V ~ 3.6V

Data Converters:: A/D 10x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 105°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32F103C6T7ATR FAQ

1.How can I place an order for STM32F103C6T7ATR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32F103C6T7ATR 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 STM32F103C6T7ATR reliable?

The price and inventory of STM32F103C6T7ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F103C6T7ATR is usually 5 days.

3.What payment methods are accepted for STM32F103C6T7ATR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F103C6T7ATR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32F103C6T7ATR?

STM32F103C6T7ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32F103C6T7ATR 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 STM32F103C6T7ATR?

For technical support, including STM32F103C6T7ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F103C6T7ATR requirements.

6.How does Aetrix verify that STM32F103C6T7ATR is sourced from the original manufacturer or authorized distributors?

All STM32F103C6T7ATR 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 STM32F103C6T7ATR meets industry standards.

7.What is the process for return or replacement of STM32F103C6T7ATR?

All STM32F103C6T7ATR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F103C6T7ATR, 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 STM32F103C6T7ATR part is unused and in its original packaging.

Return procedure for STM32F103C6T7ATR:

1.Submit a request within 90 days.

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

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