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STMicroelectronics STM32L151RBT6A
- Part No.:
- STM32L151RBT6A
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L151RBT6A.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,090
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Product details
Overview
STM32L151RBT6A from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 32 KB SRAM, 4 KB EEPROM with ECC, 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs - deployed in battery-powered medical sensors, portable industrial monitors, and smart utility meters requiring sub-µA standby operation.
For engineers reviewing the STM32L151RBT6A datasheet, STM32L151RBT6A pinout, STM32L151RBT6A application, or STM32L151RBT6A equivalent, key selection criteria include verified ultra-low-power mode current (0.28 µA Standby), USB 2.0 full-speed interface with internal 48 MHz PLL, LCD driver exclusion (per device variant), and LQFP64 package compatibility with 73 5V-tolerant I/Os.
Technical Context
The STM32L151RBT6A integrates a Cortex-M3 core running up to 32 MHz with MPU, dynamic voltage scaling, and five low-power modes - including Stop mode (0.44 µA) and Standby mode (0.28 µA) - all supported by multiple clock sources: HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), and MSI (65 kHz–4.2 MHz).
Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, VREFINT reference, and dual buffered 12-bit DACs - all operable down to 1.8 V supply, while digital peripherals include USB, three USARTs (with IrDA/ISO 7816), two SPIs (16 Mbit/s), and two I²Cs (SMBus/PMBus).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3, 32-bit, up to 32 MHz - delivers 1.25 DMIPS/MHz for deterministic real-time control in resource-constrained edge nodes. |
| Memory | 128 KB Flash (ECC), 32 KB SRAM, 4 KB EEPROM (ECC) - enables robust firmware storage, data logging, and parameter retention across power cycles. |
| Power Modes | 0.28 µA Standby (3 wakeup pins), 0.44 µA Stop (16 wakeup lines), 10.9 µA Low-power Run - supports multi-year battery life in intermittent-sensing applications. |
| Analog Peripherals | 12-bit ADC (1 Msps, 24 channels), 2×12-bit DAC (buffered), 2×ultra-low-power comparators - allows simultaneous sensor acquisition, analog output control, and threshold-triggered wake-up. |
| Digital Interfaces | USB 2.0 FS (48 MHz PLL), 3×USART, 2×SPI (16 Mbit/s), 2×I²C (SMBus/PMBus), 10×timers - provides flexible connectivity for host communication, sensor buses, and precise timing control. |
| I/O & Packaging | 73 I/Os (5V tolerant), LQFP64 (10 × 10 mm) - ensures PCB layout compatibility with legacy 64-pin MCU footprints and mixed-voltage system interfacing. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; 64-pin quad flat lead frame suitable for reflow assembly and industrial-grade thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 1.65–3.6 V supply rails with dedicated analog/digital domains - enables noise-isolated mixed-signal operation. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General-purpose I/O | 73 total GPIOs (5V tolerant on most), mappable to 16 external interrupt vectors - supports flexible peripheral routing and hardware event prioritization. |
| NRST | Active-low reset input | Asynchronous reset with programmable debounce and BOR/POR supervision - guarantees reliable startup under brownout or ESD stress. |
| USB_DP / USB_DM | USB 2.0 full-speed differential pair | Integrated transceiver with internal pull-ups - eliminates external PHY and reduces BOM cost for USB-connected embedded devices. |
| OSC_IN / OSC_OUT | External crystal oscillator inputs | Supports 1–24 MHz crystals - enables precise timing for RTC, USB, and synchronous comms without external clock generator. |
Key Features
| Feature | Design Value |
|---|---|
| ECC-protected memories | 128 KB Flash and 4 KB EEPROM with error correction - prevents silent data corruption in long-life field deployments (e.g., utility metering). |
| Ultra-low I/O leakage | 10 nA max per pin - preserves battery charge during extended sleep intervals without external isolation circuitry. |
| Sub-8 µs wake-up time | From Stop mode to first instruction execution - meets hard real-time response requirements in sensor-fusion and alarm-triggered systems. |
| Capacitive touch support | Up to 20 channels for touchkey/linear/rotary sensors - enables direct integration of user interfaces without dedicated touch controller IC. |
| Programmable voltage detector | Configurable PVD thresholds - allows adaptive brownout protection aligned with battery discharge curve in Li-ion or coin-cell systems. |
Applications
| Wearable Health Monitor | Smart Gas Meter |
|---|---|
Use Scenario: Continuous ECG/temperature sensing with BLE upload during periodic wake-up windows. IC Role / Device Role / Timing Role: Main system controller managing analog front-end, low-power timer-triggered sampling, and USB/BLE coexistence via DMA-driven transfers. Use Value: 0.28 µA Standby + 10.9 µA Low-power Run enables >3-year operation on CR2032, while dual DACs calibrate sensor offsets in real time. |
Use Scenario: Battery-powered gas flow measurement with pulse counting, pressure/temperature compensation, and secure data logging. IC Role / Device Role / Timing Role: Primary data acquisition unit interfacing with MEMS pressure sensor, thermistor, and Hall-effect flow counter via ADC/DAC/comparators. Use Value: 4 KB EEPROM with ECC stores calibration coefficients and usage history; RTC + tamper-detect I/Os support regulatory compliance logging. |
| Industrial Wireless Sensor Node | Portable Diagnostic Tool |
Use Scenario: LoRaWAN node collecting vibration, humidity, and ambient light data every 15 minutes. IC Role / Device Role / Timing Role: Central processing unit executing sensor fusion algorithms, managing LoRa transceiver SPI interface, and scheduling deep-sleep cycles. Use Value: 73 5V-tolerant I/Os simplify connection to legacy industrial sensors; USB interface enables field firmware updates without JTAG debugger. |
Use Scenario: Handheld device performing rapid impedance spectroscopy on biological samples using swept-frequency AC excitation. IC Role / Device Role / Timing Role: Real-time waveform generator (via DAC) and high-speed ADC capture engine synchronized by TIM2/TIM3 PWM timers. Use Value: 12-bit ADC at 1 Msps captures transient responses; internal 16 MHz HSI ±1% eliminates crystal cost while meeting medical-grade timing accuracy. |
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 |
|---|---|---|---|
| STM32L431RCT6 | Higher performance (80 MHz Cortex-M4F), 256 KB Flash, no EEPROM, higher active current (80 µA/MHz) | Better suited for DSP-intensive tasks (e.g., FFT-based spectral analysis); lacks true EEPROM for parameter retention | Select when floating-point math or larger code footprint is required, and EEPROM can be emulated in Flash. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB Flash, 256 KB RAM, 2.5 µA EM4 mode, no USB, no DAC | Optimized for lowest energy-per-instruction in intermittent sensing; requires external USB bridge for host comms | Prefer for sub-µA always-on monitoring where USB is unnecessary and memory scalability is critical. |
Compared with STM32L151RBT6A, STM32L431RCT6 trades EEPROM and ultra-low standby for higher compute throughput, while EFM32PG12B500F1024GL125 achieves deeper sleep but sacrifices integrated USB and analog output capability - making STM32L151RBT6A optimal for balanced USB-enabled, battery-operated measurement systems.
Availability
STM32L151RBT6A is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic tools requiring stable component supply across multi-year production cycles.
Supply support for STM32L151RBT6A 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, sensors, and analog components for industrial, automotive, and consumer markets.
The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust memory integrity, and rich analog integration - specifically optimized for metering, portable medical, and environmental monitoring systems.
FAQ
Does STM32L151RBT6A include an integrated LCD controller?
No. The STM32L151RBT6A excludes the LCD driver present in STM32L152 variants. This is explicitly confirmed in Section 3.9 of the datasheet ("LCD (liquid crystal display)" states "except STM32L151x6/8/B-A devices"). The RBT6A variant is intended for applications requiring USB, rich analog peripherals, and low-power operation without display functionality.
What is the maximum operating temperature range for STM32L151RBT6A?
The STM32L151RBT6A is rated for operation from –40°C to +105°C, as specified in the "Features" section (page 1) and Table 14 ("General operating conditions") of the datasheet. This extended industrial temperature range supports deployment in harsh environments such as outdoor utility infrastructure and factory-floor instrumentation.
Is the USB interface on STM32L151RBT6A compliant with USB 2.0 full-speed specifications?
Yes. The device integrates a USB 2.0 full-speed (12 Mbps) interface with an internal 48 MHz PLL clock source, supporting device-mode operation without external crystal. Electrical compliance is verified per Tables 51–53 in the datasheet, including startup time (<1.5 ms), DC characteristics, and full-speed signal integrity.
How many I/O pins on STM32L151RBT6A are 5V tolerant?
73 I/O pins are 5V tolerant, as stated in the "Features" section (page 1) and confirmed in Section 3.6 ("GPIOs") and Table 43 ("I/O static characteristics"). This tolerance applies to all GPIOs except those dedicated to USB, JTAG, and certain analog inputs - enabling direct interfacing with legacy 5V logic and sensors without level-shifting circuitry.
STM32L151RBT6A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L1
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, Cap Sense, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 51
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 32K 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:
STM32L151RBT6A FAQ
1.How can I place an order for STM32L151RBT6A through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151RBT6A 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 STM32L151RBT6A reliable?
The price and inventory of STM32L151RBT6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151RBT6A is usually 5 days.
3.What payment methods are accepted for STM32L151RBT6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151RBT6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151RBT6A?
STM32L151RBT6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151RBT6A 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 STM32L151RBT6A?
For technical support, including STM32L151RBT6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151RBT6A requirements.
6.How does Aetrix verify that STM32L151RBT6A is sourced from the original manufacturer or authorized distributors?
All STM32L151RBT6A 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 STM32L151RBT6A meets industry standards.
7.What is the process for return or replacement of STM32L151RBT6A?
All STM32L151RBT6A units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151RBT6A, 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 STM32L151RBT6A part is unused and in its original packaging.
Return procedure for STM32L151RBT6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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