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STMicroelectronics STM32L151VBT6TR
- Part No.:
- STM32L151VBT6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32L151VBT6TR.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,145
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Product details
Overview
STM32L151VBT6TR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller in LQFP100 package, featuring 128 KB Flash, 16 KB SRAM, 4 KB EEPROM with ECC, 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs. It operates from 1.65–3.6 V, achieves 0.57 µA Stop mode current, and supports USB 2.0, LCD (excluded in L151 series), and capacitive touch sensing - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L151VBT6TR datasheet, STM32L151VBT6TR pinout, STM32L151VBT6TR application, or STM32L151VBT6TR equivalent, key selection criteria include verified ultra-low-power mode timing (e.g., <8 µs wakeup), precise analog performance (ADC/DAC linearity, comparator window mode), USB 2.0 full-speed compliance, and validated 73-pin 5V-tolerant I/O mapping for mixed-voltage system interfacing.
Technical Context
The device implements dynamic voltage scaling across five low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby), with dedicated BOR/POR/PVD circuitry enabling robust operation across -40°C to +85°C. Its clock system integrates six independent sources: HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and USB PLL (48 MHz).
Analog subsystem includes two ultra-low-power comparators with wake-up capability, temperature sensor, internal VREFINT, and hardware-accelerated CRC unit. Memory protection unit (MPU) enforces privilege separation, while 7-channel DMA supports concurrent peripheral-to-memory transfers without CPU intervention.
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 loops. |
| Flash / RAM / EEPROM | 128 KB Flash with ECC, 16 KB SRAM, 4 KB true EEPROM with ECC - ensures firmware integrity and nonvolatile parameter storage without external components. |
| Power Consumption | 0.57 µA in Stop mode (16 wakeup lines), 9 µA in Low-power Run mode - enables multi-year battery life in coin-cell-powered devices. |
| ADC | 12-bit, 1 Msps, up to 24 channels - supports simultaneous sampling of multiple sensor inputs (e.g., thermistor, pressure, humidity) with <±1 LSB INL. |
| DAC | Two 12-bit buffered DACs - generate precision analog outputs for calibration signals or actuator biasing without external op-amps. |
| I/O Voltage Tolerance | 73 of 83 I/Os are 5V tolerant - simplifies interface to legacy 5V peripherals and reduces level-shifter count in mixed-supply systems. |
| USB Interface | Full-speed USB 2.0 with integrated 48 MHz PLL - enables direct PC connectivity for firmware updates and data export without external PHY. |
Pinout & Package
LQFP100 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate domains for digital core (VDD), analog (VDDA), and I/O bank 2 (VDDIO2) - enable independent power gating and noise isolation. |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated analog ground (VSSA) minimizes coupling into ADC/DAC reference paths; VSSIO2 ties to I/O bank 2 logic ground. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7 | General-purpose I/Os | 83 total GPIOs; 73 support 5V tolerance - allow direct connection to 5V sensors, displays, or logic without level shifters. |
| NRST | Active-low reset input | Asynchronous reset with Schmitt trigger; compatible with push-button or supervisor IC assertion - ensures reliable cold start. |
| BOOT0 | Boot mode selection | High at reset enables system memory bootloader via USART - supports field firmware recovery without debugger. |
| USB_DP / USB_DM | USB differential pair | On-chip transceiver with integrated termination - eliminates external resistors and simplifies USB routing on 4-layer boards. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Stop mode | 0.57 µA with 16 wakeup lines active - extends battery life in intermittently active monitoring nodes (e.g., environmental sensors). |
| ECC-protected memories | Hardware ECC on Flash and EEPROM - prevents silent data corruption in safety-critical firmware and calibration storage. |
| Capacitive touch controller | Up to 20 channels supporting touchkey/linear/rotary sensors - enables intuitive HMI in handheld medical devices without external IC. |
| Programmable voltage detector (PVD) | Configurable threshold monitoring of VDD - triggers interrupt or reset before brownout, protecting against erratic behavior during battery sag. |
| RTC with calendar and alarm | Low-power real-time clock with 0.9 µA standby current - maintains accurate timekeeping across deep sleep cycles for scheduled wakeups. |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with Bluetooth LE telemetry and rechargeable coin-cell operation. IC Role / Device Role / Timing Role: Central MCU managing analog front-end sampling, digital filtering, secure BLE packetization, and RTC-scheduled transmission bursts. Use Value: Sub-µA Stop mode and <8 µs wakeup ensure >3-year battery life; 12-bit ADC/DAC enable high-fidelity biosignal conditioning without external converters. |
Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, and periodic GPRS upload. IC Role / Device Role / Timing Role: Primary controller handling metrology calculations, LCD driving (via GPIO bit-banging), tamper detection, and secure data logging. Use Value: 4 KB EEPROM stores lifetime kWh/m³ data with ECC; 5V-tolerant I/Os interface directly to mechanical pulse sensors and optical isolators. |
| Industrial Wireless Sensor Node | Portable Gas Detector |
Use Scenario: Battery-powered node measuring temperature, humidity, and CO₂ via I²C sensors, transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Low-power host processor executing sensor fusion, duty-cycled radio control, and secure OTA update handling. Use Value: Dual DACs calibrate sensor baselines; ultra-low I/O leakage (10 nA) prevents false wakeups in dusty/humid enclosures. |
Use Scenario: Handheld toxic gas analyzer with electrochemical sensor, buzzer alarm, and OLED display. IC Role / Device Role / Timing Role: Real-time sensor signal conditioning (ADC oversampling), alarm logic execution, and display refresh coordination. Use Value: Two ultra-low-power comparators detect rapid gas concentration thresholds; 128 KB Flash hosts multi-gas calibration profiles and firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L431RCT6 | Higher performance (80 MHz Cortex-M4F), no EEPROM, 256 KB Flash, lower Stop mode current (0.12 µA) | Requires external EEPROM for persistent storage; better suited for sensor fusion with floating-point math | Select when computational throughput outweighs EEPROM dependency and cost sensitivity is moderate. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB Flash, 256 KB RAM, no USB, superior Stop mode (0.15 µA), integrated DC-DC converter | No native USB interface; optimized for RF-heavy designs (e.g., sub-GHz mesh nodes) | Prefer when RF integration and lowest possible active current dominate over USB connectivity and ecosystem tooling. |
Compared with STM32L151VBT6TR, the STM32L431RCT6 trades EEPROM for higher speed and larger memory, while the EFM32PG12B500F1024GL125 eliminates USB but adds DC-DC efficiency - making the L151 optimal where embedded EEPROM, USB, and balanced ultra-low-power analog integration are mandatory.
Availability
STM32L151VBT6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable gas detectors requiring stable component supply across multi-year production cycles.
Supply support for STM32L151VBT6TR 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 demanding extended battery life, integrated analog peripherals, and robust operation in harsh environments - emphasizing energy efficiency without sacrificing feature richness.
FAQ
What is the maximum operating frequency and corresponding power supply range?
The STM32L151VBT6TR operates up to 32 MHz across its full 1.65–3.6 V supply range, enabled by dynamic voltage scaling. At 32 MHz, typical active current is 214 µA/MHz; at 1.65 V, maximum frequency is reduced to 16 MHz per datasheet Table 4, ensuring safe timing margins under low-voltage conditions.
Does this MCU support hardware encryption or secure boot?
No, the STM32L151VBT6TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. Security relies on software-based implementations or external secure elements; later series like STM32L4/L5 add these features. Its TRNG is also absent - random number generation requires software algorithms or external sources.
Can the internal 12-bit DAC drive a load directly?
Yes, both DAC channels include integrated output buffers capable of driving resistive loads up to 5 kΩ with full rail-to-rail swing. For capacitive loads >100 pF or low-impedance loads (<1 kΩ), external op-amp buffering is recommended to maintain settling time and monotonicity per datasheet Section 3.11.
Is the LCD controller functional on this part number?
No, the STM32L151VBT6TR excludes the LCD controller block. Per datasheet Section 2.1 and Table 1, LCD functionality is only present in STM32L152xx variants; L151 devices omit this peripheral entirely - confirmed by absence of COM/SEG pins and LCD register map in the reference manual.
STM32L151VBT6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-LQFP
- Series:
- STM32L1
- Packaging:
- Tape & Reel (TR)
- 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:
- 16K 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:
STM32L151VBT6TR FAQ
1.How can I place an order for STM32L151VBT6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151VBT6TR 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 STM32L151VBT6TR reliable?
The price and inventory of STM32L151VBT6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151VBT6TR is usually 5 days.
3.What payment methods are accepted for STM32L151VBT6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151VBT6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151VBT6TR?
STM32L151VBT6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151VBT6TR 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 STM32L151VBT6TR?
For technical support, including STM32L151VBT6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151VBT6TR requirements.
6.How does Aetrix verify that STM32L151VBT6TR is sourced from the original manufacturer or authorized distributors?
All STM32L151VBT6TR 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 STM32L151VBT6TR meets industry standards.
7.What is the process for return or replacement of STM32L151VBT6TR?
All STM32L151VBT6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151VBT6TR, 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 STM32L151VBT6TR part is unused and in its original packaging.
Return procedure for STM32L151VBT6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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