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STMicroelectronics STM32F101CBT6
- Part No.:
- STM32F101CBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32F101CBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,086
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Product details
Overview
STM32F101CBT6 from STMicroelectronics is a medium-density ARM® Cortex®-M3 microcontroller with 128 KB Flash, 16 KB SRAM, 36 MHz max CPU frequency, 12-bit ADC (1 µs conversion), and 7 communication interfaces (2×I²C, 3×USART, 2×SPI). It operates from 2.0–3.6 V, supports Sleep/Stop/Standby low-power modes, and integrates RTC with VBAT backup-used in industrial sensor nodes requiring deterministic real-time control and mixed-signal interfacing.
For engineers reviewing the STM32F101CBT6 datasheet, STM32F101CBT6 pinout, STM32F101CBT6 application, or STM32F101CBT6 equivalent, key selection criteria include Flash/SRAM size, 48-pin LQFP package compatibility, 36 MHz timing headroom for deterministic ISR execution, and integrated temperature sensing for thermal monitoring in enclosed enclosures.
Technical Context
The STM32F101CBT6 implements an ARM Cortex-M3 core with Harvard bus architecture, single-cycle multiplication, and hardware divide-enabling deterministic interrupt latency under 12 cycles. Its clock system includes dual oscillators (4–16 MHz HSE + 32.768 kHz LSE), programmable PLL, and factory-trimmed 8 MHz HSI for rapid startup without external crystals.
DMA supports 7 channels with peripheral arbitration for concurrent ADC sampling, SPI data streaming, and USART TX/RX buffering-reducing CPU load during high-throughput serial telemetry. The NVIC provides 64 interrupt lines with 16 priority levels, enabling nested handling of timer overflows, ADC EOC, and external GPIO events without polling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 36 MHz max - delivers 1.25 DMIPS/MHz for real-time control loops with sub-10 µs ISR response. |
| Flash Memory | 128 KB - sufficient for bootloader + dual-application firmware images with OTA update capability. |
| SRAM | 16 KB - supports stack depth for nested interrupts and buffer space for 2× full-duplex USART + SPI DMA transfers. |
| ADC | 12-bit, 1 µs conversion, 16-channel - enables simultaneous sampling of voltage, current, and temperature in motor control feedback paths. |
| Timers | 6 timers: 3×16-bit general-purpose (IC/OC/PWM), 2×watchdog (independent + window), 1×SysTick - supports PWM-driven LED dimming, safety-critical timeout monitoring, and OS tick generation. |
| Communication Interfaces | 2×I²C (SMBus/PMBus), 3×USART (LIN/IrDA/modem control), 2×SPI (18 Mbit/s) - covers sensor fusion (I²C), fieldbus connectivity (LIN), and high-speed peripheral bridging (SPI). |
| Supply Voltage | 2.0–3.6 V - compatible with single-cell Li-ion (3.0–3.6 V) and regulated 3.3 V rails without level-shifting. |
| Package | LQFP48 (7 × 7 mm) - standard footprint for cost-sensitive industrial PCBs with manual rework capability. |
Pinout & Package
LQFP48 package, 7 × 7 mm body, 0.5 mm pitch, 48 leads. RoHS-compliant, ECOPACK® certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Separate analog/digital power pins enable clean ADC reference and reduce digital switching noise coupling. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | 5 V-tolerant on most pins - simplifies interface to legacy 5 V sensors and logic without external level shifters. |
| PA1–PA3, PA11–PA12 | USB D+/D− (not applicable) | Not connected in STM32F101CBT6 - this variant lacks USB PHY; pins repurposed as GPIO or alternate functions (e.g., USART2_TX/RX). |
| PA0, PB0–PB1 | ADC input channels | Supports up to 16 external analog inputs - enables multi-sensor acquisition (voltage, current, thermistor) with shared sample-and-hold. |
| PA9–PA10, PB6–PB7, PB10–PB11 | USART/TWI/SPI alternate functions | Remappable via AFIO register - allows routing critical comms to less congested pins during PCB layout. |
| NRST | Active-low reset input | Internal pull-up; accepts 10 µs minimum pulse width - ensures reliable reset under brown-out or ESD transient conditions. |
Key Features
| Feature | Design Value |
|---|---|
| Embedded CRC calculation unit | Hardware-accelerated 32-bit CRC-32 for firmware image integrity verification during boot and OTA updates. |
| Temperature sensor | Calibrated internal sensor (±1.5°C accuracy) - enables board-level thermal derating without external ICs. |
| Programmable voltage detector (PVD) | Configurable trip points (2.2–2.9 V) - triggers interrupt before brown-out, allowing graceful shutdown of peripherals. |
| Serial wire debug (SWD) | 2-pin debug interface (SWDIO/SWCLK) - reduces debug footprint vs JTAG while supporting full flash programming and real-time trace. |
| 96-bit unique ID | Factory-programmed serial number - used for device authentication, license binding, and secure firmware activation. |
Applications
| Industrial Sensor Node | Smart HVAC Controller |
|---|---|
Use Scenario: Standalone environmental monitor with CO₂, humidity, and temperature sensors feeding data via RS-485 to building management systems. IC Role / Device Role / Timing Role: Central MCU managing sensor polling, calibration compensation, UART-to-RS485 translation, and watchdog supervision. Use Value: Integrated 12-bit ADC and 3×USART eliminate external signal conditioning and transceiver ICs, reducing BOM count by 4 components. |
Use Scenario: Wall-mounted thermostat with touch interface, fan speed control, and wireless gateway coexistence. IC Role / Device Role / Timing Role: Real-time scheduler coordinating display refresh, PWM fan control, and BLE/Wi-Fi coexistence timing windows. Use Value: Low-power Stop mode (2.5 µA typical) extends battery life to >2 years on CR2032, while 36 MHz headroom ensures jitter-free PWM at 25 kHz. |
| Programmable Logic Relay | Medical Infusion Pump Monitor |
Use Scenario: DIN-rail mounted relay module accepting 0–10 V analog setpoints and driving 24 V solenoid outputs with configurable hysteresis. IC Role / Device Role / Timing Role: Deterministic state machine executing PID loop at 100 Hz, validating input safety limits, and updating relay drivers. Use Value: Independent watchdog + window watchdog provide dual-layer fail-safe reset, meeting IEC 61508 SIL-2 functional safety requirements. |
Use Scenario: Battery-powered infusion pump with pressure sensing, motor control, and alarm signaling via buzzer and LED. IC Role / Device Role / Timing Role: Safety-critical controller managing motor phase sequencing, occlusion detection (ADC-based pressure slope), and audible/visual alerts. Use Value: VBAT-supplied RTC maintains time-of-infusion logging during main power loss, satisfying FDA 21 CFR Part 11 audit trail requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F030F4P6 | ARM Cortex-M0, 16 KB Flash, 4 KB SRAM, no RTC or temperature sensor | Lacks VBAT backup, lower interrupt density, no hardware CRC | Select when cost is primary constraint and RTC/logging not required; requires external RTC for time-stamped events. |
| STM32F103C8T6 | Same package, 64 KB Flash, 20 KB SRAM, USB 2.0 FS device, no PVD | Includes USB PHY but removes programmable voltage detector | Choose for USB-connected devices needing host enumeration; avoid if brown-out detection is mandatory for field reliability. |
Compared with STM32F101CBT6, the STM32F030F4P6 trades safety features and mixed-signal capability for lower unit cost, while the STM32F103C8T6 adds USB connectivity at the expense of PVD-making STM32F101CBT6 optimal for industrial edge nodes requiring robust power monitoring and analog integration without USB overhead.
Availability
STM32F101CBT6 is available at Aetrix Electronics and suitable for industrial sensor nodes, smart HVAC controllers, programmable logic relays, and medical infusion pump monitors requiring stable component supply across extended product lifecycles.
Supply support for STM32F101CBT6 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, and automotive ICs with vertical manufacturing capabilities.
The STM32F1 series targets cost-sensitive industrial and consumer applications requiring ARM Cortex-M3 performance with integrated analog peripherals and low-power operation-designed for seamless migration from 8-bit MCUs without sacrificing real-time determinism.
FAQ
What is the maximum operating frequency of the STM32F101CBT6?
The STM32F101CBT6 achieves a maximum CPU frequency of 36 MHz with zero wait-state Flash access, delivering 1.25 DMIPS/MHz performance per Dhrystone 2.1 benchmark. This frequency is sustained across the full 2.0–3.6 V supply range and –40°C to +85°C ambient temperature, verified in ST's production test flow per DocID13586 Rev 17 Section 5.3.1.
Does the STM32F101CBT6 support USB functionality?
No, the STM32F101CBT6 does not include a USB physical layer or USB controller. Unlike the STM32F103xx series, this part omits USB functionality entirely-pins PA11 and PA12 are configured as general-purpose I/O or alternate functions (e.g., USART2_CK), as confirmed in Table 4 (Medium-density STM32F101xx pin definitions) of the official datasheet.
How many ADC channels are available, and what is their resolution?
The STM32F101CBT6 integrates one 12-bit analog-to-digital converter with up to 16 external input channels (PA0–PA7, PB0–PB1, PC0–PC5). Conversion time is 1 µs at maximum clock rate, with a full-scale range of 0–3.6 V referenced to VDDA, and includes an internal temperature sensor channel per Section 2.3.24 and Table 41 of the datasheet.
What debug interfaces are supported?
The STM32F101CBT6 supports Serial Wire Debug (SWD) using SWDIO and SWCLK pins, and full JTAG via TMS, TCK, TDI, TDO, and TRST pins. SWD is the recommended interface due to its 2-pin footprint and full debug capability-including flash programming, breakpoint setting, and real-time variable inspection-as documented in Section 2.3.25 and Figure 25 of the datasheet.
STM32F101CBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32F1
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 36MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- 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:
STM32F101CBT6 FAQ
1.How can I place an order for STM32F101CBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F101CBT6 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 STM32F101CBT6 reliable?
The price and inventory of STM32F101CBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F101CBT6 is usually 5 days.
3.What payment methods are accepted for STM32F101CBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F101CBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F101CBT6?
STM32F101CBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F101CBT6 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 STM32F101CBT6?
For technical support, including STM32F101CBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F101CBT6 requirements.
6.How does Aetrix verify that STM32F101CBT6 is sourced from the original manufacturer or authorized distributors?
All STM32F101CBT6 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 STM32F101CBT6 meets industry standards.
7.What is the process for return or replacement of STM32F101CBT6?
All STM32F101CBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32F101CBT6, 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 STM32F101CBT6 part is unused and in its original packaging.
Return procedure for STM32F101CBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32F101CBT6 Tags
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