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STMicroelectronics STM32F102C4T6ATR
- Part No.:
- STM32F102C4T6ATR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F102C4T6ATR.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,125
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Product details
Overview
STM32F102C4T6ATR from STMicroelectronics is a low-density USB access line Arm® Cortex®-M3 MCU with 16 KB Flash, 4 KB SRAM, USB 2.0 Full-Speed interface, 48 MHz CPU clock, and integrated 12-bit ADC - deployed in embedded control systems requiring compact footprint, USB connectivity, and real-time sensor interfacing.
For engineers reviewing the STM32F102C4T6ATR datasheet, STM32F102C4T6ATR pinout, STM32F102C4T6ATR application, or STM32F102C4T6ATR equivalent, key selection criteria include LQFP48 package compatibility, USB FS PHY integration, 5V-tolerant I/O count (37 pins), and support for industrial temperature range (–40°C to +85°C) with VBAT-backed RTC.
Technical Context
The device implements a single-core Arm Cortex-M3 processor with Harvard architecture, 1.25 DMIPS/MHz performance, and hardware division/multiplication. It integrates a full-speed USB 2.0 transceiver with internal pull-ups, eliminating external PHY components.
Clock management includes dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), factory-trimmed 8 MHz HSI RC, and PLL for CPU clock synthesis. Power management supports Sleep, Stop, and Standby modes with VBAT supply for RTC and backup registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3, 48 MHz max - enables deterministic real-time execution with NVIC and SysTick timer support. |
| Memory | 16 KB Flash + 4 KB SRAM - sufficient for USB HID/DFU firmware, sensor fusion, and small RTOS deployments. |
| USB Interface | USB 2.0 Full-Speed (12 Mbit/s) with integrated transceiver - eliminates need for external PHY; supports CDC, HID, and DFU classes. |
| ADC | 1 × 12-bit, 1.2 µs conversion time, up to 16 channels - suitable for analog sensor acquisition (e.g., temperature, voltage monitoring). |
| I/O Pins | 37 GPIOs, 5 V-tolerant - simplifies interface with legacy 5 V peripherals without level shifters. |
| Timers | Two 16-bit general-purpose timers (4 IC/OC/PWM channels each), independent + window watchdog, SysTick - supports motor control, PWM generation, and safety-critical timing. |
| Communication | 1× I²C, 2× USART (LIN/IrDA/ISO 7816), 1× SPI (12 Mbit/s) - enables multi-protocol peripheral bridging and serial diagnostics. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified. Pinout validated per STMicroelectronics DS5934 Rev 6, Figure 3 (LQFP48 pinout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 2.0–3.6 V supply domains; decoupling required per Section 33 of DS5934 for stable USB operation. |
| PA11/PA12 | USB D+/D− | Dedicated full-speed USB transceiver pins; require 1.5 kΩ pull-up on D+ for device enumeration. |
| NRST | Active-low reset | Asynchronous reset input; supports external push-button or supervisor IC assertion. |
| BOOT0 | Boot mode select | High at power-on forces system memory boot (for ISP via USART); low selects user Flash boot. |
| OSC_IN/OSC_OUT | HSE crystal interface | Supports 4–16 MHz external crystal; essential for USB clock accuracy and precise timing applications. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded USB FS PHY | Reduces BOM cost and PCB area by integrating transceiver, termination resistors, and pull-up logic. |
| 5 V-tolerant I/Os | Enables direct connection to 5 V logic without external level translators - critical for industrial I/O expansion. |
| Temperature sensor | On-die sensor calibrated against reference voltage - provides system thermal monitoring without external components. |
| CRC calculation unit | Hardware-accelerated CRC-32 computation - improves firmware update integrity verification speed and reliability. |
| SWD debug interface | 2-pin Serial Wire Debug replaces JTAG - saves board space while supporting full flash programming and real-time trace. |
Applications
| Industrial Sensor Node | USB Human Interface Device |
|---|---|
Use Scenario: Compact environmental monitor collecting temperature, humidity, and voltage data in factory settings. IC Role / Device Role / Timing Role: Main controller executing sensor polling, ADC sampling, USB CDC data streaming, and RTC timestamping. Use Value: Integrated USB FS and 5 V-tolerant I/Os enable direct PC connectivity and robust interfacing with 5 V sensors and power supplies. | Use Scenario: Keypad or custom HID peripheral with LED feedback and button matrix scanning. IC Role / Device Role / Timing Role: USB HID class device handling report generation, debouncing, and LED PWM control via TIM channels. Use Value: Single-chip solution eliminates external USB PHY and reduces latency in report transmission due to on-die transceiver. |
| Programmable Logic Controller I/O Module | Energy Meter Front-End |
Use Scenario: DIN-rail mounted I/O expansion module with digital inputs, relay outputs, and USB configuration port. IC Role / Device Role / Timing Role: Real-time I/O manager using EXTI for edge-triggered input capture and TIM for output pulse generation. Use Value: 37 5 V-tolerant GPIOs support direct connection to industrial 24 V DC inputs via optocouplers and relay drivers. | Use Scenario: Smart meter sub-system acquiring AC voltage/current via isolated ADC front-end and reporting via USB. IC Role / Device Role / Timing Role: Data concentrator performing ADC oversampling, RMS calculation, and USB bulk transfer of energy logs. Use Value: 12-bit ADC with temperature sensor enables on-chip calibration drift compensation for long-term measurement stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-enabled microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F042F4P6 | ARM Cortex-M0 core, 48 MHz, 16 KB Flash, USB FS, but no temperature sensor or VBAT RTC backup. | Lacks RTC calendar functionality and battery-backed registers - unsuitable for time-stamped logging without external RTC. | Select when cost sensitivity outweighs RTC and sensor requirements; requires external RTC for timestamping. |
| STM32F103C4T6 | Same LQFP48 package, 2× more Flash (32 KB), 2× more SRAM (6 KB), but no USB FS PHY - requires external USB transceiver. | Higher memory capacity supports larger protocol stacks (e.g., USB MSC), but increases BOM and layout complexity. | Select when application demands >16 KB code space and can accommodate external USB PHY design. |
Compared with STM32F042F4P6, the STM32F102C4T6ATR adds VBAT-backed RTC and temperature sensing at identical Flash/SRAM size; compared with STM32F103C4T6, it trades memory headroom for integrated USB PHY and lower system-level component count.
Availability
STM32F102C4T6ATR is available at Aetrix Electronics and suitable for industrial sensor nodes, USB HID peripherals, programmable logic controller I/O modules, and energy meter front-ends requiring stable component supply across extended product lifecycles.
Supply support for STM32F102C4T6ATR 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, specializing in microcontrollers, power management, sensors, and automotive ICs.
The STM32F102x4/x6 series belongs to the USB Access Line - designed specifically for cost-sensitive, space-constrained embedded applications requiring native USB device functionality without external transceivers.
FAQ
Does STM32F102C4T6ATR support USB host mode?
No. The STM32F102C4T6ATR integrates only a USB 2.0 Full-Speed device transceiver - it operates exclusively in device mode (e.g., CDC, HID, DFU). Host or OTG functionality requires higher-density STM32 families such as the F105/F107 or F4-series with USB OTG peripherals.
What is the maximum operating temperature range for this part?
The STM32F102C4T6ATR is rated for industrial temperature range: –40°C to +85°C ambient. This is confirmed in Section 5.3.1 (General operating conditions) of DS5934 Rev 6, and applies to all LQFP48 variants in the STM32F102x4/x6 family.
Can PA11 and PA12 be used as general-purpose I/Os when USB is disabled?
No. PA11 (USB DM) and PA12 (USB DP) are dedicated, non-remappable USB transceiver pins. They cannot be configured as standard GPIOs even when USB is not initialized - their alternate function is hardwired and lacks AFIO remapping capability per RM0008 reference manual.
Is the internal 8 MHz RC oscillator accurate enough for USB communication?
No. The internal 8 MHz HSI RC has ±1% typical accuracy - insufficient for USB Full-Speed timing (±0.25% required). USB operation mandates use of the 4–16 MHz HSE crystal oscillator or calibrated HSE bypass mode, as specified in Section 2.3.22 and Table 42 of DS5934.
STM32F102C4T6ATR 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:
- 48MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- DMA, PDR, POR, PVD, PWM, Temp Sensor, WDT
- Number of I/O:
- 37
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 4K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F102C4T6ATR FAQ
1.How can I place an order for STM32F102C4T6ATR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F102C4T6ATR 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 STM32F102C4T6ATR reliable?
The price and inventory of STM32F102C4T6ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F102C4T6ATR is usually 5 days.
3.What payment methods are accepted for STM32F102C4T6ATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F102C4T6ATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F102C4T6ATR?
STM32F102C4T6ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F102C4T6ATR 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 STM32F102C4T6ATR?
For technical support, including STM32F102C4T6ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F102C4T6ATR requirements.
6.How does Aetrix verify that STM32F102C4T6ATR is sourced from the original manufacturer or authorized distributors?
All STM32F102C4T6ATR 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 STM32F102C4T6ATR meets industry standards.
7.What is the process for return or replacement of STM32F102C4T6ATR?
All STM32F102C4T6ATR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F102C4T6ATR, 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 STM32F102C4T6ATR part is unused and in its original packaging.
Return procedure for STM32F102C4T6ATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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