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STMicroelectronics STM32F100R8T7B
- Part No.:
- STM32F100R8T7B
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32F100R8T7B.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,400
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Product details
Overview
STM32F100R8T7B from STMicroelectronics is a 32-bit ARM® Cortex®-M3 microcontroller in LQFP64 package, featuring 64 KB Flash, 8 KB SRAM, 24 MHz max CPU frequency, 1×12-bit ADC (16-channel), and 2×12-bit DACs. It integrates 12 timers (including advanced-control timer with dead-time generation), 8 communication interfaces (3×USART, 2×SPI, 2×I²C, CEC), and operates from 2.0–3.6 V for industrial sensor nodes and motor control edge devices.
For engineers reviewing the STM32F100R8T7B datasheet, STM32F100R8T7B pinout, STM32F100R8T7B application, or STM32F100R8T7B equivalent, key selection criteria include Flash/SRAM size, 5 V-tolerant I/O count (up to 51 pins), real-time clock with VBAT backup, SWD/JTAG debug support, and integrated analog peripherals for closed-loop control.
Technical Context
The STM32F100R8T7B implements an ARM Cortex-M3 core with single-cycle multiply and hardware divide, executing at up to 24 MHz (1.25 DMIPS/MHz). Its clock system includes dual oscillators (8 MHz HSI ±1%, 32.768 kHz LSE), programmable PLL, and PVD for supply monitoring.
It supports three low-power modes (Sleep, Stop, Standby) with RTC and backup registers powered by VBAT. The 7-channel DMA controller offloads data movement for ADC, DAC, USART, SPI, and I²C-enabling deterministic real-time response without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 24 MHz max - enables deterministic real-time task scheduling in resource-constrained embedded systems. |
| Flash Memory | 64 KB - sufficient for firmware with USB stack, sensor fusion algorithms, and bootloader. |
| SRAM | 8 KB - supports multiple concurrent peripheral buffers (e.g., UART RX/TX, ADC DMA, DAC waveform tables). |
| ADC | 1×12-bit, 1.2 µs conversion, 16 channels - suitable for multi-sensor acquisition (temperature, voltage, current) with <1 LSB INL. |
| DAC | 2×12-bit, monotonic output - enables precise analog waveform generation or reference voltage control for external circuitry. |
| I/O Pins | 51 GPIO, 5 V-tolerant - simplifies interface with legacy 5 V logic, sensors, and actuators without level shifters. |
| Timers | 12 timers including 1×advanced-control (6 PWM + dead-time), 2×basic (DAC trigger), 2×watchdog - supports motor FOC, power supply sequencing, and safety monitoring. |
| Communication | 3×USART (LIN/IrDA), 2×SPI (12 Mbit/s), 2×I²C (SMBus/PMBus), CEC - meets industrial comms requirements including fieldbus bridging and appliance control. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - provides mechanical stability and thermal dissipation for continuous operation in ambient temperatures up to 85 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 2.0–3.6 V supply rails; decoupling required per STM32 layout guidelines to ensure stable core and analog operation. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/O | 51 total 5 V-tolerant pins; configurable as EXTI sources, remappable alternate functions (e.g., TIM2_CH1 on PA0 or PB10). |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–5.5 V logic levels and supports external push-button or supervisor IC assertion. |
| BOOT0 | Boot mode selection | High at power-up selects system memory boot (for ISP via USART); low selects user Flash - critical for field firmware updates. |
| SWDIO / SWCLK | Serial Wire Debug interface | 2-pin debug port replacing JTAG; enables full flash programming, breakpoint debugging, and real-time variable inspection with minimal PCB footprint. |
| VREF+, VREF− | Analog reference inputs | Optional external 1.2–3.6 V reference for ADC/DAC - improves accuracy vs. internal VREFINT (1.22 V ±10%) in precision measurement applications. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable voltage detector (PVD) | Configurable trip points (2.2–2.9 V) enable early warning of brown-out conditions before system reset occurs. |
| Temperature sensor | Calibrated ±1.5 °C accuracy across −40 to +85 °C - allows on-chip thermal monitoring without external components. |
| CEC interface | HDMI-compatible consumer electronics control - supports remote command routing in smart home gateways and AV receivers. |
| RTC with calibration | 32.768 kHz oscillator with ±1 ppm calibration register - achieves <2 ppm timekeeping drift after factory trim, suitable for metering and timestamping. |
| CRC calculation unit | Hardware-accelerated 32-bit CRC-32 - reduces firmware overhead for firmware integrity checks and communication frame validation. |
| 96-bit unique ID | Factory-programmed serial number - enables secure device authentication and license binding in OEM production. |
Applications
| Industrial Sensor Node | Smart Appliance Control |
|---|---|
|
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ via I²C sensors and transmitting data over UART-to-LoRaWAN gateway. IC Role / Device Role / Timing Role: Main MCU executing sensor polling, ADC sampling, data preprocessing, and low-power state management with RTC wake-up intervals. Use Value: Integrated 12-bit ADC and 5 V-tolerant I/O eliminate external signal conditioning; Stop mode current <2.5 µA extends battery life beyond 5 years. |
Use Scenario: Washing machine main control board managing motor drive (via PWM), water valve actuation, display interface, and safety interlocks. IC Role / Device Role / Timing Role: Real-time controller coordinating 3-phase motor commutation (using advanced timer dead-time), fault detection, and user interface timing. Use Value: 6-channel advanced-control timer generates synchronized PWM with programmable dead-time; 2×DACs provide analog feedback references for current sensing. |
| Energy Metering Subsystem | USB-C Power Delivery Monitor |
|
Use Scenario: DIN-rail mounted electricity meter measuring voltage/current harmonics using shunt-based analog front-end and reporting via RS-485. IC Role / Device Role / Timing Role: Precision analog acquisition engine with simultaneous sampling, FFT preprocessing, and secure data logging to Flash. Use Value: 12-bit ADC with 16-channel scan mode captures synchronized voltage/current waveforms; CRC unit validates firmware and metering logs against tampering. |
Use Scenario: USB-C PD sink adapter monitoring VBUS voltage/current, negotiating power contracts, and controlling buck-boost regulation via I²C-connected PMIC. IC Role / Device Role / Timing Role: PD policy engine interfacing with USB-C transceiver (e.g., STUSB4500) and managing real-time voltage ramping and fault shutdown. Use Value: 3×USART with LIN capability supports robust PD communication; 2.0–3.6 V supply range matches USB-C VBUS regulation window without LDO overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32F072RBT6 | ARM Cortex-M0, 48 MHz, 128 KB Flash, 16 KB SRAM, no DAC, 1×12-bit ADC (16 ch) | Lacks dual DAC and RTC calibration; higher clock but lower analog integration | Select when cost-sensitive designs require larger Flash and higher throughput but can omit DAC-based analog outputs. |
| STM32G071RBT6 | ARM Cortex-M0+, 64 MHz, 128 KB Flash, 36 KB SRAM, 2×12-bit DAC, 1×12-bit ADC (19 ch) | Higher performance, enhanced security (AES, RNG), no CEC or dedicated advanced timer | Prefer for new designs needing cryptographic features, larger RAM for RTOS stacks, or higher ADC channel count - but verify CEC and dead-time timer requirements. |
Compared with STM32F100R8T7B, the STM32F072RBT6 trades analog integration for raw speed and Flash capacity, while the STM32G071RBT6 upgrades core architecture and security but omits CEC and advanced timer features critical for legacy appliance control and HDMI-adjacent systems.
Availability
STM32F100R8T7B is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control, energy metering subsystems, and USB-C power delivery monitors requiring stable component supply across extended product lifecycles.
Supply support for STM32F100R8T7B 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, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive-grade components since 1987.
The STM32F100 value line targets cost-sensitive, low-power embedded applications where analog integration, small footprint, and industrial temperature range (−40 to +85 °C) are essential - particularly in white goods, building automation, and portable instrumentation.
FAQ
What is the maximum operating frequency and corresponding power consumption of the STM32F100R8T7B?
The STM32F100R8T7B operates at up to 24 MHz. At 24 MHz, 3.3 V, and full peripheral enablement, typical active current is 12.5 mA (Run mode). In Stop mode with regulator active, it draws 2.5 µA at 25 °C - verified in Section 5.3.15 of DocID16455 Rev 9.
Does the STM32F100R8T7B support USB connectivity?
No, the STM32F100R8T7B does not integrate a USB peripheral. It lacks USB PHY and controller hardware. For USB-enabled variants in the same family, engineers should consider the STM32F103 series (e.g., STM32F103C8T6) which includes full-speed USB 2.0 device interface.
How many I/O pins are 5 V-tolerant, and what is the maximum pin count in LQFP64?
All 51 general-purpose I/O pins in the LQFP64 package are 5 V-tolerant. Pin count is fixed at 64; 51 are user-configurable GPIOs, while remaining pins serve power, reset, debug, and clock functions - confirmed in Table 4 (Pin Definitions) and Figure 4 (LQFP64 pinout) of the datasheet.
Is the STM32F100R8T7B qualified for automotive applications?
No, the STM32F100R8T7B is specified for industrial temperature range (−40 to +85 °C) and is not AEC-Q100 qualified. For automotive use, ST offers the STM32F105/107 or STM32G4 series with AEC-Q100 Grade 2 qualification, extended temperature support, and enhanced ESD/EMC robustness.
STM32F100R8T7B 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:
- 24MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- DMA, PDR, POR, PVD, PWM, Temp Sensor, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 8K x 8
- Voltage - Supply (Vcc/Vdd):
- 2V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32F100R8T7B FAQ
1.How can I place an order for STM32F100R8T7B through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32F100R8T7B 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 STM32F100R8T7B reliable?
The price and inventory of STM32F100R8T7B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32F100R8T7B is usually 5 days.
3.What payment methods are accepted for STM32F100R8T7B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32F100R8T7B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32F100R8T7B?
STM32F100R8T7B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32F100R8T7B 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 STM32F100R8T7B?
For technical support, including STM32F100R8T7B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32F100R8T7B requirements.
6.How does Aetrix verify that STM32F100R8T7B is sourced from the original manufacturer or authorized distributors?
All STM32F100R8T7B 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 STM32F100R8T7B meets industry standards.
7.What is the process for return or replacement of STM32F100R8T7B?
All STM32F100R8T7B units undergo pre-shipment inspection (PSI). If there is an issue with STM32F100R8T7B, 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 STM32F100R8T7B part is unused and in its original packaging.
Return procedure for STM32F100R8T7B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32F100R8T7B Tags
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