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STMicroelectronics STM32L151VBT6A
- Part No.:
- STM32L151VBT6A
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32L151VBT6A.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,314
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Product details
Overview
STM32L151VBT6A from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller in LQFP100 package, 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 and industrial IoT edge nodes requiring sub-µA standby operation.
For engineers reviewing the STM32L151VBT6A datasheet, STM32L151VBT6A pinout, STM32L151VBT6A application, or STM32L151VBT6A equivalent, key selection criteria include verified 0.28 µA Standby current (3 wakeup pins), USB 2.0 full-speed interface with internal 48 MHz PLL, and 73 5V-tolerant I/Os mappable to 16 external interrupt vectors.
Technical Context
The device implements dynamic voltage scaling across six low-power modes (Run, Sleep, Low-power Run, Low-power Sleep, Stop, Standby), with hardware-accelerated power state transitions and <8 µs wake-up from Stop mode. Its memory protection unit (MPU) enforces privilege separation between secure and non-secure code regions.
Clock architecture integrates five independent sources: HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a programmable PLL supporting CPU and USB clock domains - enabling precise timing control for mixed-signal sensor fusion and real-time USB data streaming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3 @ up to 32 MHz; delivers 1.25 DMIPS/MHz for deterministic real-time control in resource-constrained embedded systems. |
| Memory | 128 KB Flash with ECC, 32 KB SRAM, 4 KB true EEPROM with ECC - ensures firmware integrity and non-volatile parameter storage without external components. |
| Power Consumption | 0.28 µA Standby (3 wakeup pins); enables >10-year battery life in coin-cell-powered remote monitors. |
| Analog Peripherals | 12-bit ADC (1 Msps, 24 channels), 2×12-bit DACs with buffers, 2×ultra-low-power comparators - supports simultaneous multi-sensor signal acquisition and analog output generation. |
| Communication | 1×USB 2.0 FS, 3×USART (ISO 7816/IrDA), 2×SPI (16 Mbit/s), 2×I²C (SMBus/PMBus) - provides flexible connectivity for wired diagnostics, wireless gateway interfacing, and sensor bus aggregation. |
| I/O Capability | 83 fast I/Os (73 5V tolerant), all mappable to 16 external interrupt vectors - simplifies PCB layout and enables direct interfacing with legacy 5V logic or industrial sensors. |
| Temperature Range | -40°C to +105°C operating range - qualified for deployment in automotive cabin modules and industrial motor controllers. |
Pinout & Package
LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, moisture sensitivity level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate analog/digital/IO rails enable noise isolation for precision ADC/DAC operation and robust 5V-tolerant I/O drive. |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated analog/digital/IO ground planes minimize coupling noise in mixed-signal applications. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7 | General-purpose I/Os | 73 pins support 5V tolerance; all configurable as EXTI lines or alternate functions (e.g., USART_TX, SPI_MOSI) - eliminates level-shifter requirements. |
| NRST | Active-low reset input | Internal pull-up; accepts external reset assertion or watchdog timeout signal - ensures deterministic recovery after brownout or fault conditions. |
| USB_DP / USB_DM | USB 2.0 full-speed differential pair | Integrated transceiver with internal 1.5 kΩ pull-up on DP - enables direct USB connection without external PHY or resistor network. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power modes | 0.28 µA Standby (3 wakeup pins), 0.44 µA Stop (16 wakeup lines), <8 µs wake-up - extends battery life in intermittent-sampling applications like environmental loggers. |
| Embedded EEPROM | 4 KB true EEPROM with ECC - retains calibration data and device configuration across 100k write cycles without external memory or wear-leveling firmware. |
| Capacitive sensing | Up to 20 channels supporting touchkey/linear/rotary sensors - enables intuitive HMI in portable medical devices without dedicated touch controller IC. |
| Hardware CRC unit | Dedicated CRC-32 engine accelerates firmware update validation and communication packet integrity checks - reduces CPU load during OTA updates. |
| Temperature sensor | Calibrated on-chip sensor (±1.5°C accuracy) with 12-bit ADC channel - provides system thermal monitoring without external thermistor or signal conditioning. |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with Bluetooth LE telemetry and local anomaly detection. IC Role / Device Role / Timing Role: Central MCU managing analog front-end sampling, digital filtering, USB/USART firmware updates, and real-time low-power scheduling. Use Value: 12-bit ADC with 1 Msps and 24-channel multiplexing captures multi-lead biosignals; 0.28 µA Standby extends coin-cell life beyond 2 years. |
Use Scenario: Electricity/water/gas meter with pulse counting, tamper detection, and PLC/RF mesh backhaul. IC Role / Device Role / Timing Role: Primary metrology controller interfacing with shunt-based current sensing, magnetic tamper switches, and RS-485/LoRaWAN modems. Use Value: Dual 12-bit DACs generate precise reference voltages for analog front-end calibration; 105°C rating ensures reliability inside sealed outdoor enclosures. |
| Industrial Predictive Maintenance Node | Asset Tracking Beacon |
Use Scenario: Vibration/temperature/humidity sensing on rotating machinery with edge FFT analysis and cellular alerting. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating accelerometer, thermistor, and capacitive humidity data via I²C/SPI, then compressing and transmitting via UART-to-Modem bridge. Use Value: 73 5V-tolerant I/Os directly interface with legacy industrial sensors; ultra-low I/O leakage (10 nA) prevents false triggering in high-impedance sensor circuits. |
Use Scenario: GPS-enabled logistics tracker powered by Li-SOCl₂ battery, reporting location every 4 hours via NB-IoT. IC Role / Device Role / Timing Role: Power-aware host controller managing GPS cold start, modem sleep/wake coordination, and secure firmware updates over-the-air. Use Value: 1.38 µA Stop mode + RTC enables precise 4-hour wake intervals; 96-bit unique ID supports cryptographic device binding and fleet-level authentication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M3 microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L071VBT6 | Lower Flash (128 KB → 192 KB), no USB, no DAC, 12-bit ADC (1.14 Msps), 0.29 µA Standby - uses Cortex-M0+ core. | Suitable for cost-sensitive, USB-free designs where analog output is unnecessary (e.g., simple sensor nodes). | Select when USB interface and dual DACs are not required, and Cortex-M0+ performance suffices for control tasks. |
| STM32L431VCT6 | Higher performance (Cortex-M4F @ 80 MHz), 256 KB Flash, 64 KB SRAM, no EEPROM, 0.08 µA Standby - adds FPU and ART Accelerator. | Better suited for real-time FFT, motor control, or advanced encryption where M4F compute capability is essential. | Choose when floating-point math, larger code footprint, or higher throughput justifies increased power in active mode. |
Compared with STM32L071VBT6, the STM32L151VBT6A adds USB and DACs at slightly higher active power; versus STM32L431VCT6, it trades peak compute for guaranteed EEPROM and lower standby current - making it optimal for long-life, mixed-signal, USB-connected edge nodes.
Availability
STM32L151VBT6A is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial predictive maintenance nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L151VBT6A 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 analog solutions for industrial, automotive, and consumer markets.
The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust operation across harsh temperature ranges - optimized for sensor nodes, portable medical devices, and energy-harvesting systems.
FAQ
Does STM32L151VBT6A support USB device mode without external crystal?
Yes. The device integrates an internal 48 MHz PLL fed by the HSE or MSI oscillator, enabling full-speed USB 2.0 device operation without an external 48 MHz crystal. USB_DP includes an internal 1.5 kΩ pull-up resistor, satisfying USB specification requirements for enumeration.
What is the maximum number of 5V-tolerant I/Os on STM32L151VBT6A?
73 I/Os are 5V tolerant, covering all GPIOs except those dedicated to analog functions (e.g., VREF+, VREF−, VBAT, VDDA, VSSA). This allows direct interfacing with 5V logic families, industrial sensors, and legacy peripherals without level-shifting circuitry.
How does the embedded EEPROM differ from standard Flash in endurance and retention?
The 4 KB true EEPROM supports 100,000 write/erase cycles and 20-year data retention at 85°C - exceeding standard Flash (10,000 cycles, 20-year retention at 25°C). It uses dedicated ECC and wear-leveling hardware, eliminating need for software emulation or external EEPROM.
Can the STM32L151VBT6A operate reliably at 105°C junction temperature?
Yes. The device is fully specified and tested for operation from –40°C to +105°C ambient temperature. Electrical characteristics including ADC accuracy, DAC linearity, and I/O leakage (10 nA max) are guaranteed across this range, validated per AEC-Q100 stress test conditions.
STM32L151VBT6A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-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:
- 83
- 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 24x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L151VBT6A FAQ
1.How can I place an order for STM32L151VBT6A through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151VBT6A 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 STM32L151VBT6A reliable?
The price and inventory of STM32L151VBT6A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151VBT6A is usually 5 days.
3.What payment methods are accepted for STM32L151VBT6A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151VBT6A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151VBT6A?
STM32L151VBT6A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151VBT6A 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 STM32L151VBT6A?
For technical support, including STM32L151VBT6A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151VBT6A requirements.
6.How does Aetrix verify that STM32L151VBT6A is sourced from the original manufacturer or authorized distributors?
All STM32L151VBT6A 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 STM32L151VBT6A meets industry standards.
7.What is the process for return or replacement of STM32L151VBT6A?
All STM32L151VBT6A units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151VBT6A, 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 STM32L151VBT6A part is unused and in its original packaging.
Return procedure for STM32L151VBT6A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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