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STMicroelectronics STM32F102CBT6TR
- Part No.:
- STM32F102CBT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F102CBT6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,106
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Product details
Overview
STM32F102CBT6TR from STMicroelectronics is a medium-density USB access line Arm® Cortex®-M3 microcontroller featuring 128 KB Flash, 16 KB SRAM, USB 2.0 Full-Speed interface, 48 MHz CPU clock, and integrated 12-bit ADC with temperature sensor-used in embedded USB peripheral controllers, industrial HMI front-ends, and low-power sensor concentrators.
For engineers reviewing the STM32F102CBT6TR datasheet, STM32F102CBT6TR pinout, STM32F102CBT6TR application, or STM32F102CBT6TR equivalent, key selection criteria include USB FS timing compliance, 5 V-tolerant I/O count (37 pins), RTC+VBAT support, and SWD/JTAG debug accessibility in LQFP48 packaging.
Technical Context
The device implements an Arm Cortex-M3 core with single-cycle multiply/hardware divide, supporting deterministic real-time execution at up to 48 MHz. Its clock system integrates dual oscillators (8 MHz HSI + 32.768 kHz LSE), programmable PLL, and PVD for supply monitoring-enabling precise USB frame timing and RTC calibration.
Peripherals are managed via a 7-channel DMA controller servicing timers, ADC, USARTs, SPIs, and I²Cs concurrently. The NVIC supports 64 interrupt vectors with configurable priority, while EXTI maps all GPIOs to 16 external interrupt lines-critical for responsive button, sensor, or bus event handling in compact USB devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3, 48 MHz max - enables real-time USB protocol stack execution without external co-processor |
| Memory | 128 KB Flash + 16 KB SRAM - sufficient for USB HID/CDC class firmware with local data buffering |
| USB Interface | USB 2.0 Full-Speed (12 Mbit/s) - compliant with USB-IF certification requirements for peripheral enumeration |
| ADC | 12-bit, 1.2 µs conversion, 16 channels - supports simultaneous sampling of analog sensors and internal temperature measurement |
| I/O Pins | 37/51 GPIOs, 5 V-tolerant - allows direct interfacing with legacy 5 V logic without level shifters |
| Timers | Three 16-bit general-purpose timers + SysTick + watchdogs - provides PWM generation, timebase, and fail-safe reset capability |
| Supply Range | 2.0–3.6 V - compatible with single-cell Li-ion or regulated 3.3 V systems |
Pinout & Package
LQFP48 (7 × 7 mm) package with 48-pin quad flat lead configuration, optimized for compact PCB layouts and automated assembly. Thermal pad not present; standard JEDEC-compliant footprint per Doc ID022159 (LQFP48 mechanical drawing).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O power supply | Must be decoupled with 100 nF ceramic capacitor near pin; supports 2.0–3.6 V operation |
| VSS | Ground reference | Common return for analog/digital domains; requires low-impedance PCB plane connection |
| PA0–PA15 | General-purpose I/O bank A | 5 V-tolerant; configurable as alternate function for USART1, SPI1, TIM2, ADC1_IN0–IN15 |
| USB_DP / USB_DM | USB differential data pair | Requires 27 Ω series resistors and 1.5 kΩ pull-up on DP for full-speed device enumeration |
| NRST | Active-low reset input | Externally driven reset with Schmitt-trigger input; supports programmable reset threshold via PVD |
| SWDIO / SWCLK | Serial Wire Debug interface | Enables in-circuit programming and real-time debugging without JTAG pin overhead |
Key Features
| Feature | Design Value |
|---|---|
| USB 2.0 FS PHY integration | Eliminates need for external transceiver; reduces BOM cost and board area by ~30% vs discrete USB solutions |
| Temperature sensor + VBAT backup | Enables battery-backed RTC operation and ambient temperature compensation in portable USB devices |
| Programmable voltage detector (PVD) | Allows software-configurable brown-out detection thresholds (4 levels) for graceful shutdown during supply sag |
| 5 V-tolerant I/Os | Permits direct connection to 5 V peripherals (e.g., UART-to-USB bridges, legacy sensors) without external level translators |
| Single-wire SWD debug | Reduces debug footprint to 2 pins vs 5-pin JTAG; simplifies test point routing in space-constrained designs |
Applications
| USB Human Interface Device (HID) | Industrial Sensor Node |
|---|---|
Use Scenario: Compact keyboard/mouse controller with LED feedback and firmware-upgradable USB descriptor. IC Role / Device Role / Timing Role: Primary USB device controller managing HID report descriptors, endpoint buffers, and host-synchronized polling intervals. Use Value: Integrated USB FS PHY and 128 KB Flash enable full HID class implementation with vendor-defined features and secure bootloader space. |
Use Scenario: Battery-powered environmental monitor transmitting temperature, humidity, and pressure over USB CDC ACM to PC-based SCADA. IC Role / Device Role / Timing Role: Sensor hub aggregating analog and digital inputs, performing local calibration, and acting as USB virtual COM port bridge. Use Value: On-chip 12-bit ADC with temperature sensor and VBAT-backed RTC allow accurate timestamping and drift-compensated measurements without external components. |
| USB-to-UART Bridge | Low-Power HMI Controller |
Use Scenario: Embedded serial adapter converting RS-232/RS-485 signals to USB CDC for legacy industrial equipment connectivity. IC Role / Device Role / Timing Role: Dual-role interface: UART peripheral handles asynchronous serial framing; USB peripheral manages CDC ACM class enumeration and bulk transfers. Use Value: 37× 5 V-tolerant I/Os simplify level-shifting for RS-232 drivers; Stop mode current < 3.5 µA extends battery life in intermittent-use adapters. |
Use Scenario: Touch-button panel with LED indicators and local status display, powered from USB bus or auxiliary 3.3 V rail. IC Role / Device Role / Timing Role: Real-time UI coordinator managing capacitive touch sensing, LED PWM dimming, and USB command response with sub-10 ms latency. Use Value: Three 16-bit timers provide independent PWM channels for multi-color LEDs; SWD debug enables field firmware updates without physical rework. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB-capable microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072CBT6 | ARM Cortex-M0 core, 48 MHz, 128 KB Flash, same LQFP48 package but lacks temperature sensor and has lower ADC resolution (12-bit vs 12-bit with better INL) | Suitable for cost-sensitive USB HID where thermal monitoring is unnecessary | Select when USB-CDC/HID functionality is primary and analog accuracy requirements are relaxed |
| STM32F103CBT6 | Same Cortex-M3 core and pinout, but adds CAN 2.0B controller and increases SRAM to 20 KB; no USB FS PHY (requires external transceiver) | Better for automotive diagnostics tools requiring CAN+USB dual-interface, but higher BOM cost and layout complexity | Choose only if CAN bus integration is mandatory and external USB PHY is acceptable |
Compared with STM32F102CBT6TR, STM32F072CBT6 trades thermal sensing and ADC linearity for lower cost and power, while STM32F103CBT6 sacrifices integrated USB for CAN capability-making the F102 optimal for USB-native, thermally aware embedded peripherals.
Availability
STM32F102CBT6TR is available at Aetrix Electronics and suitable for USB peripheral controllers, industrial sensor nodes, USB-to-serial bridges, and low-power HMI interfaces requiring stable component supply across production lifecycles.
Supply support for STM32F102CBT6TR 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, specializing in microcontrollers, power management, and sensor technologies for industrial, automotive, and consumer markets.
This part belongs to the STM32F102x "USB Access Line" product family-designed specifically for cost-optimized, USB-native embedded applications requiring minimal external components and rapid time-to-market.
FAQ
Does STM32F102CBT6TR support USB device enumeration without external components?
Yes. It integrates a full-speed USB 2.0 PHY with internal transceiver, requiring only two 27 Ω series resistors on DP/DM and a 1.5 kΩ pull-up resistor on DP to VDD. No external USB transceiver or crystal is needed beyond the standard 8 MHz HSE for precise USB timing.
What is the maximum operating temperature range for industrial use?
The STM32F102CBT6TR is qualified for industrial temperature range: –40 °C to +85 °C. Electrical characteristics-including ADC accuracy, USB timing margins, and Flash write endurance-are guaranteed across this range per DS5933 Rev 7 Section 5.3.1.
Can the internal temperature sensor be used for system-level thermal monitoring?
Yes. The calibrated temperature sensor connects to ADC1_IN16 and delivers readings with ±3 °C accuracy from 0 °C to 100 °C (per Table 49). It is factory-trimmed and usable in both Run and Stop modes when VDD is active, enabling thermal throttling or fan control in USB-connected devices.
Is SWD debug supported in all power modes?
SWD debug is fully functional in Run and Sleep modes. In Stop mode, debug access is disabled by default but can be enabled via DBGMCU_CR register before entering Stop-allowing breakpoint-triggered wake-up and post-mortem analysis without full system restart.
STM32F102CBT6TR 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:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 16K 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:
STM32F102CBT6TR FAQ
1.How can I place an order for STM32F102CBT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F102CBT6TR 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 STM32F102CBT6TR reliable?
The price and inventory of STM32F102CBT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F102CBT6TR is usually 5 days.
3.What payment methods are accepted for STM32F102CBT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F102CBT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F102CBT6TR?
STM32F102CBT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F102CBT6TR 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 STM32F102CBT6TR?
For technical support, including STM32F102CBT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F102CBT6TR requirements.
6.How does Aetrix verify that STM32F102CBT6TR is sourced from the original manufacturer or authorized distributors?
All STM32F102CBT6TR 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 STM32F102CBT6TR meets industry standards.
7.What is the process for return or replacement of STM32F102CBT6TR?
All STM32F102CBT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32F102CBT6TR, 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 STM32F102CBT6TR part is unused and in its original packaging.
Return procedure for STM32F102CBT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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