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STMicroelectronics STM32F102R4T6A
- Part No.:
- STM32F102R4T6A
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F102R4T6A.pdf
- Description:
- IC MCU 32BIT 16KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:958
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Product details
Overview
STM32F102R4T6A from STMicroelectronics is a low-density USB access line Arm® Cortex®-M3 microcontroller featuring 16 KB Flash, 4 KB SRAM, USB 2.0 Full-Speed interface, 48 MHz CPU clock, and integrated 12-bit ADC with temperature sensor - deployed in embedded USB peripheral controllers, industrial sensor nodes, and secure firmware-upgradable IoT endpoints.
For engineers reviewing the STM32F102R4T6A datasheet, STM32F102R4T6A pinout, STM32F102R4T6A application, or STM32F102R4T6A equivalent, key selection considerations include USB FS PHY integration, 51 I/Os with 5 V tolerance on most pins, 2.0–3.6 V supply range, and support for SWD/JTAG debug in LQFP48 package.
Technical Context
The STM32F102R4T6A implements an Arm Cortex-M3 core with single-cycle multiplication and hardware division, executing at up to 48 MHz with zero-wait-state Flash access. Its clock system integrates dual oscillators (4–16 MHz HSE and 32.768 kHz LSE), factory-trimmed 8 MHz HSI, and PLL for USB-compliant 48 MHz timing.
Peripheral architecture includes seven-channel DMA supporting concurrent transfers across timers, ADC, USARTs, SPI, and I²C; nested vectored interrupt controller (NVIC) with 64 interrupt vectors; and dedicated USB 2.0 FS controller with internal transceiver - enabling self-powered device operation without external PHY.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3, 48 MHz max - delivers 1.25 DMIPS/MHz for deterministic real-time control loops. |
| Flash Memory | 16 KB - sufficient for USB device stack + application firmware with room for field updates. |
| SRAM | 4 KB - supports USB endpoint buffers, stack, and small data structures without external RAM. |
| USB Interface | USB 2.0 Full-Speed (12 Mbit/s) with integrated PHY - eliminates need for external transceiver in cost-sensitive designs. |
| ADC | 12-bit, 1.2 µs conversion time, up to 16 channels - enables simultaneous sampling of analog sensors and internal temperature monitoring. |
| I/O Pins | 51 total, 37 mapped to external interrupt vectors, most 5 V-tolerant - simplifies interfacing with legacy logic and industrial I/O levels. |
| Timers | Two 16-bit general-purpose timers (4 IC/OC/PWM channels each), independent + window watchdog, SysTick - supports motor control PWM, pulse counting, and safety-critical timeout supervision. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant ECOPACK®; thermal pad optional per ST AN2929.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers core/peripherals; VSS provides reference return - requires local decoupling per ST layout guidelines. |
| PA11/PA12 | USB D+/D− | Dedicated full-speed USB differential pair with internal pull-ups - no external resistors needed for device enumeration. |
| NRST | Active-low reset | Asynchronous reset input with Schmitt trigger; supports external reset button or supervisor IC connection. |
| BOOT0 | Boot mode select | High at power-up forces boot from system memory (for DFU bootloader); low selects main Flash memory. |
| SWDIO/SWCLK | Serial Wire Debug | 2-pin debug interface replacing JTAG - reduces PCB footprint while retaining full SWD functionality. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB FS PHY | Eliminates external transceiver, reducing BOM count and board area in USB device applications. |
| Temperature sensor | On-die sensor calibrated against VREFINT - enables ambient/system temperature monitoring without external components. |
| Programmable voltage detector (PVD) | Configurable threshold detection on VDD - triggers interrupt or reset before brown-out, enhancing system reliability. |
| 5 V-tolerant I/Os | 37 of 51 pins tolerate 5 V inputs - allows direct interface with TTL/CMOS logic and industrial sensors without level shifters. |
| CRC calculation unit | Hardware-accelerated CRC-32 - speeds firmware integrity checks and communication frame validation. |
Applications
| USB Human Interface Device (HID) | Industrial Sensor Node |
|---|---|
Use Scenario: Keyboard, mouse, or custom HID peripheral connecting directly to PC or embedded host via USB cable. IC Role / Device Role / Timing Role: USB device controller with embedded PHY, managing descriptor exchange, report polling, and interrupt endpoint handling. Use Value: Single-chip USB connectivity reduces component count and eliminates external PHY timing skew issues. | Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and analog gas sensor outputs. IC Role / Device Role / Timing Role: Data acquisition MCU with 12-bit ADC, temperature sensor, and low-power Stop/Standby modes. Use Value: Integrated temperature sensor and PVD enable autonomous health monitoring during sleep cycles. |
| Secure Firmware Updater | Smart Lighting Controller |
Use Scenario: Field-deployed device receiving encrypted firmware updates over USB or UART with signature verification. IC Role / Device Role / Timing Role: Secure bootloader executing from system memory, validating update images using CRC and cryptographic primitives. Use Value: Hardware CRC unit accelerates image checksumming; 16 KB Flash accommodates dual-bank update scheme. | Use Scenario: LED driver module implementing dimming, color mixing, and DALI/DMX compatibility via UART or I²C. IC Role / Device Role / Timing Role: Real-time PWM generator with two 16-bit timers driving multiple LED channels and managing communication protocol stacks. Use Value: Four PWM channels per timer support independent RGBW control; 51 I/Os allow expansion for auxiliary sensors or buttons. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 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 PVD | Lacks integrated temp sensing and programmable voltage detection - unsuitable for thermal-aware or brown-out critical systems | Select when lower-cost Cortex-M0 suffices and thermal monitoring is not required |
| STM32F103C8T6 | Same Cortex-M3 core, 64 KB Flash, 20 KB SRAM, identical peripherals except higher Flash/SRAM density | Pin-compatible LQFP48 variant with larger memory - supports more complex USB class drivers or RTOS usage | Choose when application demands >16 KB Flash or >4 KB SRAM for future scalability |
Compared with STM32F042F4P6, the STM32F102R4T6A offers superior analog capability and power supervision; versus STM32F103C8T6, it trades memory headroom for optimized cost in USB-peripheral-focused designs.
Availability
STM32F102R4T6A is available at Aetrix Electronics and suitable for USB peripheral controllers, industrial sensor nodes, secure firmware-upgradable IoT endpoints, and smart lighting controllers requiring stable component supply across production lifecycles.
Supply support for STM32F102R4T6A 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 devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The STM32F102x4/x6 series belongs to ST's USB Access Line - engineered specifically for cost-sensitive, USB-connected embedded devices requiring integrated PHY, low-power operation, and robust analog integration.
FAQ
Does STM32F102R4T6A support USB device-only operation without external PHY?
Yes. The part integrates a full-speed USB 2.0 transceiver with internal pull-ups on PA11/PA12, enabling standalone USB device functionality. No external PHY or termination resistors are required for standard USB device enumeration and data transfer.
What is the maximum operating temperature range for STM32F102R4T6A?
The device is rated for industrial temperature range: –40 °C to +85 °C. Electrical characteristics including ADC accuracy, USB timing, and Flash write endurance are guaranteed across this range per DS5934 Rev 6 Section 5.3.1.
Can STM32F102R4T6A enter low-power modes while maintaining USB suspend/resume capability?
Yes. In Stop mode with regulator in Low-power mode, the USB clock remains active via LSE, allowing resume detection on the bus. The device wakes within 4 µs upon USB resume signaling, preserving USB compliance while achieving ~2.5 µA typical current draw.
Is the STM32F102R4T6A pin-compatible with other STM32F102xx variants in LQFP48?
Yes. All STM32F102x4/x6 devices in LQFP48 (e.g., STM32F102C4T6, STM32F102R4T6) share identical pinouts and electrical characteristics. Memory size differences (16 KB vs. 32 KB Flash) do not affect physical or functional pin mapping.
STM32F102R4T6A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32F1
- Packaging:
- Tray
- 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:
- 51
- 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 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F102R4T6A FAQ
1.How can I place an order for STM32F102R4T6A through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F102R4T6A 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 STM32F102R4T6A reliable?
The price and inventory of STM32F102R4T6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F102R4T6A is usually 5 days.
3.What payment methods are accepted for STM32F102R4T6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F102R4T6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F102R4T6A?
STM32F102R4T6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F102R4T6A 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 STM32F102R4T6A?
For technical support, including STM32F102R4T6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F102R4T6A requirements.
6.How does Aetrix verify that STM32F102R4T6A is sourced from the original manufacturer or authorized distributors?
All STM32F102R4T6A 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 STM32F102R4T6A meets industry standards.
7.What is the process for return or replacement of STM32F102R4T6A?
All STM32F102R4T6A units undergo pre-shipment inspection (PSI). If there is an issue with STM32F102R4T6A, 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 STM32F102R4T6A part is unused and in its original packaging.
Return procedure for STM32F102R4T6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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