STM32F103C6T7A - 32-Bit 72MHz Cortex-M3 MCU | STMicroelectronics
MPN: STM32F103C6T7A ✓ ActiveSTM32F103C6T7A Overview
A microcontroller is a programmable semiconductor that integrates a processor core, memory, peripheral interfaces, and control logic on one IC. In the STM32 hierarchy, the STM32F103C6T7A is an ARM Cortex-M3 microcontroller, a 32-bit RISC controller within the STM32F1 family and the broader embedded microcontroller and semiconductor categories. Its low-density designation indicates a balance between processing capability, memory capacity, package size, and cost rather than the resources associated with the largest STM32F1 devices.
The verified configuration provides a maximum core frequency of 72 MHz and 32 KB of Flash organized as 32K x 8. The device also includes 10 KB of SRAM. Its 48-LQFP package exposes 48 pins on a 7 x 7 mm body and is suitable for automated assembly and access to the family’s communication and control peripherals. The 2.5 V and 3.3 V operating options support conventional industrial and embedded system rails, while the manufacturer identifies the part as an ARM Cortex-M3 performance-line MCU.
The STM32F103 architecture uses a 32-bit ARM Cortex-M3 RISC core. Compared with an 8-bit microcontroller, the 32-bit instruction set and 72 MHz operating point provide greater arithmetic and control throughput for protocols, state machines, and real-time tasks. Memory remains the principal system constraint: the 32 KB Flash footprint can hold the application firmware, while the 10 KB SRAM provides working memory for stacks, buffers, and control data.
Typical uses include industrial sensor nodes, compact motor-control and actuator boards, embedded communication equipment, measurement instruments, and general-purpose industrial control modules. The 48-pin LQFP provides more exposed connections than a small-outline package while retaining a manageable board area. These applications must be reviewed against the manufacturer datasheet for the exact peripheral mix, pin multiplexing, clock configuration, electrical limits, and startup requirements.
A primary design consideration is firmware and ecosystem continuity. Designs should reserve the required programming and debug connections, validate all 48 pin assignments against the datasheet, and confirm that the 32 KB Flash and 10 KB SRAM budgets remain adequate. Because the exact peripheral and pin functions are not included in the supplied verified excerpts, they must not be inferred from other STM32F103 members.
This page consolidates the verified manufacturer and distributor identity, memory and clock data, package information, pricing, drop-in sourcing considerations, and application guidance into a focused engineering record. It also distinguishes directly supported specifications from information that still requires confirmation from the manufacturer datasheet.
Drop-in alternatives for STM32F103C6T7A — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with STM32F103C6T7A (same form factor and footprint) — differing in Package, Series.
STM32F103C6T6
✅ Drop-In ⚠️ Specs UnverifiedContact for price
View Datasheet →STM32F103C6T7
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
GD32F103C6T6
✅ Drop-In📋 Reference alternative (not in catalog)
STM32F103C6T7A Maximum Ratings & Electrical Characteristics
| Product Type | 32-bit ARM Cortex-M3 RISC microcontroller |
| Processor Core | ARM Cortex-M3 at 72 MHz |
| Instruction Width | 32-bit |
| Maximum CPU Frequency | 72 MHz |
| Flash Memory | 32 KB (32K x 8) |
| SRAM | 10 KB |
| Operating Supply | 2.5 V or 3.3 V |
| Package | 48-LQFP (7 x 7 mm) |
| Pin Count | 48 pins |
| Mounting Type | Surface mount |
| Product Family | STM32F1 performance line |
| Series | STM32F103 low-density performance line |
| Manufacturer | STMicroelectronics |
| RoHS Status | Compliant |
| Moisture Sensitivity Level | MSL 3 |
STM32F103C6T7A 48-lqfp (7 x 7 mm) Pin Configuration Guide
Pin configuration for STM32F103C6T7A (48-lqfp (7 x 7 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for STM32F103C6T7A.
Refer to the datasheet for full pin configuration.
Typical Applications
STM32F103C6T7A is suitable for 6 applications: Industrial Sensor Controller, Compact Motor Control Module, Embedded Communication Gateway, Measurement and Data-Acquisition Module, Low-Cost Robotics Control, General-Purpose Embedded Control Board.
Industrial Sensor Controller
The STM32F103C6T7A fits compact industrial sensor nodes because its 72 MHz ARM Cortex-M3 core provides sufficient control throughput for sampling, filtering, state management, and local decision-making while remaining constrained to 32 KB Flash and 10 KB SRAM. The 48-LQFP 7 x 7 mm package provides a practical balance between board area and pin access. Place the MCU beside the sensor interface and power-management circuitry, then reserve programming and debug connections for production programming. Before schematic release, verify the exact GPIO count, communication peripherals, operating-temperature range, and analog front-end requirements in the manufacturer datasheet.
Recommended
Compact Motor Control Module
The STM32F103C6T7A can serve as the command processor in a compact motor or actuator-control module, using its 72 MHz 32-bit Cortex-M3 core for timing, state estimation, and communication handling. Its 32 KB Flash and 10 KB SRAM are adequate for focused control firmware, although they require disciplined code sizing. The 48-LQFP package exposes more pins than a compact leadless package, which can simplify routing of control signals and debug functions. Validate timer channels, encoder inputs, PWM outputs, current limits, and thermal performance against the exact datasheet because these details were not included in the verified excerpts.
Recommended
Embedded Communication Gateway
The STM32F103C6T7A is appropriate for a small protocol-conversion or communication gateway when the design uses a 72 MHz Cortex-M3 core for packet handling and 32 KB Flash for a compact firmware image. Its 48-LQFP package offers sufficient external connections for a UART, SPI, or other supported interface subject to datasheet verification. The device is best suited to gateways with bounded protocol complexity because only 10 KB SRAM is available. Use a dedicated transceiver for physical-layer communication and confirm pin multiplexing, peripheral availability, and electrical limits before selecting the final interface architecture.
Recommended
Measurement and Data-Acquisition Module
The STM32F103C6T7A can coordinate measurements in a compact data-acquisition module because the 72 MHz Cortex-M3 core can service timing, digital filtering, calibration, and host communication within a constrained 32 KB Flash and 10 KB SRAM budget. The 48-LQFP package provides a practical surface-mount footprint with 48 numbered pins. Signal integrity and measurement accuracy depend on the analog front end, grounding, reference design, and sensor network rather than MCU frequency alone. Verify the exact ADC resolution, sampling characteristics, timer resources, and analog pins in the manufacturer documentation before assigning acquisition channels.
Recommended
Low-Cost Robotics Control
The STM32F103C6T7A suits small educational, laboratory, or prototype robotics controllers where a 72 MHz ARM Cortex-M3 core simplifies real-time tasking without requiring a high-end processor. The 32 KB Flash and 10 KB SRAM constrain firmware size, so priority scheduling, compact drivers, and disciplined buffering are important. Its 48-LQFP package makes prototyping and inspection straightforward and provides ample external routing options compared with a leadless package. Confirm motor-control timers, capture channels, communication interfaces, and pin assignments for the exact device before connecting actuators or feedback sensors.
Recommended
General-Purpose Embedded Control Board
The STM32F103C6T7A is a sensible centerpiece for a general-purpose embedded control board combining a 72 MHz 32-bit processor, 32 KB Flash, and 10 KB SRAM. Its performance-line positioning makes it suitable for real-time control, peripheral management, and simple human-interface logic while keeping the package at a manageable 48-LQFP 7 x 7 mm size. Designers should budget memory early, provide stable 2.5 V or 3.3 V supply rails as applicable, and preserve access to programming and debug signals. Exact GPIO, timer, communication, and electrical details require confirmation from the exact manufacturer datasheet.
Recommended
Recommended Products Summary
Engineering reference data for STM32F103C6T7A — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | STM32F103C6T6 | STM32F103C6T7 | GD32F103C6T6 |
|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | GigaDevice |
| Package | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) | 48-LQFP (7 x 7 mm) |
| Processor Core | ARM Cortex-M3 | ARM Cortex-M3 | ARM Cortex-M3 | Cortex-M3 |
| Maximum CPU Frequency | 72 MHz | 72 MHz | 72 MHz | 72 MHz |
| Flash Memory | 32 KB (32K x 8) | 32 KB | 32 KB | 32 KB |
| SRAM | 10 KB | 10 KB | 10 KB | 10 KB |
| Software Ecosystem | STMicroelectronics STM32 ecosystem | STMicroelectronics STM32 ecosystem | STMicroelectronics STM32 ecosystem | GigaDevice GD32 firmware and peripheral library |
| Migration Requirement | Baseline STMicroelectronics STM32F103 design | Suffix, grade, and ordering-code check required | Suffix and ordering-code check required | Firmware, SDK, startup-code, timing, and peripheral revalidation required |
Key Differentiators
- Established STMicroelectronics software and support baseline (vs GD32F103C6T6)
- Exact 32 KB memory target (vs STM32F103C8T6)
- Compact 48-pin surface-mount implementation (vs GD32F103C6T6)
- Identifiable 72 MHz Cortex-M3 resource class (vs STM32F103C6T6)
Design Notes
Do not treat the STM32F103C6T7A, STM32F103C8T6, and every GD32F103 member as interchangeable. The target is verified with 32 KB of Flash, while C8-family devices commonly provide 64 KB, a 100% increase that exceeds the strict 30% drop-in proximity threshold. A second-source design should preserve the exact 32 KB memory target, verify all 48 LQFP pins and alternate functions, and qualify the alternative firmware, clock tree, peripheral behavior, and timing rather than relying only on the package drawing.
Budget the STM32F103C6T7A from the manufacturer datasheet because the supplied excerpts do not provide run-mode or low-power current values. Evaluate the processor at 72 MHz, all enabled peripherals, I/O loading, and the selected 2.5 V or 3.3 V rail, then add regulator tolerance and transient margin. If dynamic current affects thermal design, estimate dissipation as Estimated: P = VIN x IIN and compare the resulting junction temperature with the device limit; do not use an unsupported average-current figure.
Route the 48-LQFP footprint in accordance with the exact manufacturer land pattern and preserve access to programming and debug signals. Place decoupling and storage components close to their associated supply or interface pins, keep sensitive analog and communications routes away from fast-switching nodes, and provide a robust ground reference. The verified excerpts identify the package as 48-LQFP, 7 x 7 mm, but do not provide pin names or exposed-pad details, so those must be taken directly from the STM32F103C6 package drawing.
The supplied records do not provide the package thermal resistance or maximum junction temperature for the STM32F103C6T7A. Avoid relying on a generic LQFP thermal value. After schematic and board-layout completion, calculate power loss from the actual supply voltage and worst-case current, then apply the package-specific thermal data from the manufacturer datasheet. Estimated: junction rise equals power dissipation multiplied by the applicable thermal resistance. This calculation must be repeated for ambient temperature, PCB copper, enclosure conditions, and neighboring heat sources.
Compliance Information
RoHS compliance and MSL 3 are stated in the supplied PartGenie cross-reference result for STM32F103C6T7A. The remaining compliance fields were not present in the verified excerpts and remain unknown.