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STMicroelectronics STM32L100RBT6
- Part No.:
- STM32L100RBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L100RBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,461
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Product details
Overview
STM32L100RBT6 from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 10 KB SRAM, 2 KB EEPROM with ECC, integrated LCD driver (8×28 segments), and USB 2.0 interface. It operates from 1.8 V to 3.6 V across –40°C to +85°C, delivers 214 µA/MHz in Run mode, and achieves 0.57 µA in Stop mode - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L100RBT6 datasheet, STM32L100RBT6 pinout, STM32L100RBT6 application, or STM32L100RBT6 equivalent, key selection criteria include verified low-power mode current (0.57 µA Stop), dual 12-bit DAC channels with output buffers, 12-bit 1 Msps ADC with up to 20 channels, and LQFP64 package compatibility with existing STM32L1 footprint designs.
Technical Context
The STM32L100RBT6 implements a multi-voltage-domain architecture with dynamic voltage scaling to optimize power vs. performance. Its clock system integrates six independent sources - including HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and PLL - enabling precise trade-offs between wakeup latency (<8 µs) and active-mode efficiency.
Peripherals are partitioned across power domains: the LCD controller and RTC operate in Standby/Stop modes with dedicated backup registers and 2 KB true EEPROM with ECC for nonvolatile parameter storage. All 51 I/Os support remapping to 16 external interrupt vectors, and seven DMA channels coordinate high-efficiency data movement between ADC, DAC, USB, and memory without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3 @ up to 32 MHz; 1.25 DMIPS/MHz Dhrystone 2.1 performance metric |
| Memory | 128 KB Flash with ECC, 10 KB SRAM, 2 KB true EEPROM with ECC - enables robust firmware updates and calibration data retention |
| Power Consumption | 0.57 µA in Stop mode (16 wakeup lines); 9 µA in Low-power run mode - extends coin-cell battery life beyond 5 years in periodic-sensing applications |
| Analog Peripherals | 12-bit ADC (1 Msps, 20 channels), dual 12-bit DAC with output buffers, two ultra-low-power comparators - supports sensor signal conditioning and analog actuator control |
| Communication | USB 2.0 full-speed, 3× USART (ISO 7816/IrDA), 2× SPI (16 Mbit/s), 2× I²C (SMBus/PMBus) - enables direct PC connectivity and multi-sensor bus integration |
| Timers & Control | Six 16-bit general-purpose timers (4 IC/OC/PWM each), two basic timers, independent + window watchdogs - supports motor control, PWM dimming, and safety-critical timeout supervision |
| LCD Driver | Supports up to 8×28 segment LCD without external bias circuitry - reduces BOM count in portable instrumentation displays |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with ECOPACK®2 environmental compliance. Pinout validated per STMicroelectronics DocID024295 Rev 6, Figure 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core & I/O power supply / ground | Dual power domain: VDD powers core/peripherals; VSS provides reference return path for all digital and analog sections |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE1 | General-purpose I/O | 51 total fast I/Os; 42 are 5V-tolerant - allows direct interfacing with legacy 5V logic without level shifters |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external debounced pushbutton or supervisor IC assertion |
| BOOT0 | Boot mode selection | High at power-on selects system memory bootloader (USART-based firmware update); low selects user Flash execution |
| USB_DP / USB_DM | USB 2.0 differential data pair | Full-speed (12 Mbps) interface compliant with USB 2.0 specification; requires 1.5 kΩ pull-up on DP for device enumeration |
| OSC_IN / OSC_OUT | External crystal oscillator inputs | Supports 1–24 MHz crystals; used for precise timing in USB, RTC, and communication peripherals |
| PC13–PC15 | RTC/LSE pins | Drive 32.768 kHz crystal for RTC operation with calibration capability - enables accurate timekeeping in Stop/Standby modes |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.57 µA with 16 wakeup lines enabled - preserves RAM content and retains peripheral configuration during extended sleep intervals |
| ECC-protected memories | 128 KB Flash and 2 KB EEPROM both include error-correcting code - prevents silent corruption in field-deployed firmware and calibration tables |
| Integrated LCD controller | Drives 8 commons × 28 segments directly - eliminates external LCD bias generator and reduces PCB layer count in handheld devices |
| Programmable voltage detector (PVD) | Configurable threshold monitoring of VDD - triggers interrupt or reset before brownout, enabling graceful shutdown of critical subsystems |
| Multi-speed internal RC oscillators | MSI (65 kHz–4.2 MHz) + HSI (16 MHz) + LSI (37 kHz) - eliminates need for external clocks in cost-sensitive designs while maintaining timing flexibility |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
|
Use Scenario: Continuous ECG/temperature logging with Bluetooth LE offload and LCD display. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition (ADC), analog signal generation (DAC), real-time display (LCD), and USB-based firmware updates. Use Value: 0.57 µA Stop mode extends CR2032 battery life to >3 years; integrated EEPROM stores patient calibration offsets without external NVM. |
Use Scenario: Battery-backed electricity/water meter with tamper detection, pulse counting, and optical/IR communication. IC Role / Device Role / Timing Role: Primary metrology processor handling pulse input capture, RTC-based billing intervals, and secure data logging. Use Value: Dual watchdogs (IWDG + WWDG) enforce fail-safe reset behavior; 12-bit ADC achieves ±1 LSB INL for precision pulse measurement. |
| Portable Gas Detector | Industrial Wireless Sensor Node |
|
Use Scenario: Handheld CO/H₂S analyzer with electrochemical sensor, buzzer alarm, and OLED/LCD display. IC Role / Device Role / Timing Role: Signal conditioner and UI controller - digitizing sensor output, driving audible/visual alerts, and managing low-power wake cycles. Use Value: Two ultra-low-power comparators enable fast analog threshold detection; <8 µs wakeup ensures immediate response to hazardous gas thresholds. |
Use Scenario: LoRaWAN node collecting vibration, temperature, and humidity data in factory environments. IC Role / Device Role / Timing Role: Edge processing unit performing local FFT preprocessing, sensor fusion, and scheduled RF transmission. Use Value: Seven DMA channels offload CPU during concurrent ADC sampling, USB data dump, and LCD refresh - sustaining 92% CPU availability for algorithm execution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L053R8T6 | 64 KB Flash, 8 KB SRAM, no LCD driver, lower max clock (32 MHz same), higher Stop mode current (0.84 µA) | Lacks integrated LCD controller and has reduced memory - suitable only when display is handled externally or memory demand is lower | Select if LCD functionality is unnecessary and cost reduction outweighs loss of on-chip display support and EEPROM capacity |
| STM32L432KCU6 | 256 KB Flash, 64 KB SRAM, no LCD, USB DFU only (no device mode), higher active current (88 µA/MHz), Cortex-M4F with FPU | Targets floating-point computation (e.g., FFT, filtering); lacks LCD and EEPROM but adds crypto acceleration and higher precision analog | Choose when algorithmic complexity demands FPU or hardware AES, and external display controller is acceptable |
Compared with STM32L100RBT6, STM32L053R8T6 trades LCD/ECC-EEPROM for lower cost and smaller footprint, while STM32L432KCU6 upgrades compute capability at the expense of ultra-low-power analog integration and display support - making STM32L100RBT6 optimal for space-constrained, display-integrated, battery-critical applications.
Availability
STM32L100RBT6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable gas detectors, and industrial wireless sensor nodes requiring stable component supply across multi-year production cycles.
Supply support for STM32L100RBT6 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 management ICs, MEMS, and automotive semiconductors since 1987.
The STM32L1 series targets ultra-low-power embedded applications where energy efficiency, compact packaging, and integrated analog peripherals are essential - specifically engineered for battery-operated medical, metering, and portable industrial equipment.
FAQ
Does STM32L100RBT6 support USB device mode with CDC virtual COM port?
Yes, STM32L100RBT6 supports full-speed USB 2.0 device mode and includes hardware-level USB transceiver with built-in pull-up resistor control. ST's official USB device library (including CDC ACM class) is validated for this part, enabling plug-and-play serial communication over USB without external PHY.
What is the maximum allowed crystal load capacitance for the HSE oscillator?
The HSE oscillator supports crystals with load capacitance ranging from 7 pF to 12 pF, as specified in Section 6.3.6 of the datasheet (DocID024295 Rev 6). Using a 10 pF crystal with matching external capacitors (typically 12–15 pF each, depending on PCB parasitics) ensures reliable startup and frequency stability across temperature.
Can the 2 KB EEPROM be used for storing calibration coefficients during field operation?
Yes, the 2 KB true EEPROM supports byte-write and page-erase operations with 100,000 write/erase cycles and 20-year data retention at 85°C. ST provides HAL drivers and application notes (AN2604, AN4419) confirming safe in-application programming using standard Flash programming sequences with ECC verification.
Is the LCD driver compatible with static or multiplexed displays?
The LCD controller supports static, 2-, 3-, and 4-multiplex configurations up to 8 commons × 28 segments. It includes programmable bias generation, internal charge pump, and software-controlled contrast adjustment - eliminating external components for static and 2–4 mux displays commonly used in portable instrumentation.
STM32L100RBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L1
- Packaging:
- Tray
- Product Status:
- Not For New Designs
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 20x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L100RBT6 FAQ
1.How can I place an order for STM32L100RBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L100RBT6 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 STM32L100RBT6 reliable?
The price and inventory of STM32L100RBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L100RBT6 is usually 5 days.
3.What payment methods are accepted for STM32L100RBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L100RBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L100RBT6?
STM32L100RBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L100RBT6 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 STM32L100RBT6?
For technical support, including STM32L100RBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L100RBT6 requirements.
6.How does Aetrix verify that STM32L100RBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L100RBT6 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 STM32L100RBT6 meets industry standards.
7.What is the process for return or replacement of STM32L100RBT6?
All STM32L100RBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L100RBT6, 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 STM32L100RBT6 part is unused and in its original packaging.
Return procedure for STM32L100RBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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