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STMicroelectronics STM32L151VBT6
- Part No.:
- STM32L151VBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32L151VBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:540
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Product details
Overview
STM32L151VBT6 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 V to 3.6 V across –40°C to +85°C and supports USB 2.0, three USARTs, two SPIs, two I²Cs, and up to 83 fast I/Os - deployed in battery-powered industrial sensors and portable medical devices.
For engineers reviewing the STM32L151VBT6 datasheet, STM32L151VBT6 pinout, STM32L151VBT6 application, or STM32L151VBT6 equivalent, key selection criteria include standby current (0.3 µA), RTC-enabled stop mode (1.2 µA), 12-bit ADC accuracy (±1 LSB INL), USB 2.0 compliance, and 73 I/Os with 5V tolerance - all critical for energy-constrained embedded control and data acquisition systems.
Technical Context
The STM32L151VBT6 integrates a 32 MHz ARM Cortex-M3 core with MPU, dynamic voltage scaling, and five low-power modes (Run, Sleep, Low-power Run, Stop, Standby) managed by an ultra-safe BOR with five thresholds and programmable PVD. Its clock system combines HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a dedicated 48 MHz PLL for USB timing.
Analog subsystem includes two ultra-low-power comparators with window mode and wake-up capability, temperature sensor, VREFINT reference, and LCD driver circuitry (excluded in STM32L151x variants per datasheet Section 3.9). Memory architecture features ECC on Flash and EEPROM, 80-byte backup registers, and DMA with 7 channels supporting 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. |
| Memory | 128 KB Flash with ECC, 16 KB SRAM, 4 KB EEPROM with ECC - ensures firmware/data integrity in harsh environments. |
| ADC | 12-bit, 1 Msps, 24-channel - enables high-resolution analog sensing in multi-sensor nodes. |
| DAC | Two 12-bit channels with output buffers - supports precision analog output generation (e.g., sensor calibration, waveform synthesis). |
| Low-power modes | 0.3 µA Standby (3 wakeup pins), 0.57 µA Stop (16 wakeup lines), <8 µs wake-up - extends battery life in intermittent-sampling applications. |
| I/O capability | Up to 83 fast I/Os (73 5V-tolerant), all mappable to 16 external interrupt vectors - simplifies PCB routing and enhances system responsiveness. |
| USB interface | Full-speed USB 2.0 with internal 48 MHz PLL - enables direct host connectivity without external crystal or PHY. |
Pinout & Package
LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in compact industrial modules and supports automated optical inspection (AOI) and reflow soldering per JEDEC J-STD-020.
| 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 precise noise isolation and mixed-signal integrity. |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated ground paths minimize coupling between digital switching noise and sensitive analog/ADC circuits. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7 | General-purpose I/Os | 73 pins 5V-tolerant - allow direct interfacing with legacy 5V peripherals without level shifters. |
| NRST | Active-low reset input | Asynchronous reset with Schmitt trigger - ensures robust recovery from brownout or ESD events. |
| BOOT0 | Boot mode selection | Configures boot source (system memory, Flash, or SRAM) at power-on - essential for bootloader updates and field programming. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power BOR | Five selectable thresholds (1.62–2.5 V) - enables precise brownout detection across varying battery discharge curves. |
| Capacitive touch sensing | Up to 20 channels supporting touchkey/linear/rotary sensors - eliminates mechanical buttons in wearables and HMI panels. |
| True EEPROM | 4 KB with ECC and 100k write/erase cycles - stores calibration data, device IDs, or configuration parameters with guaranteed retention. |
| USB crystal-less operation | Internal 48 MHz PLL synchronized to USB SOF - removes external crystal, reducing BOM cost and board space. |
| Temperature sensor | Calibrated ±1.5°C accuracy over –40°C to +85°C - enables self-monitoring in sealed enclosures without external sensors. |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter logging consumption data hourly and transmitting via NB-IoT/LPWAN. IC Role / Device Role / Timing Role: Main controller managing sensor readout (pressure, flow), secure storage (EEPROM), RTC-based scheduling, and low-power USB/USART communication. Use Value: 0.3 µA standby current extends 10-year battery life; 12-bit ADC resolves sub-liter flow variations; ECC memory prevents data corruption during power glitches. |
Use Scenario: Handheld electrocardiogram device acquiring analog biopotentials, performing real-time filtering, and storing waveforms locally. IC Role / Device Role / Timing Role: Signal acquisition hub with dual 12-bit DACs for reference generation, 24-channel ADC for multi-lead sampling, and USB for clinical data export. Use Value: 1 Msps ADC captures 500 Hz bandwidth ECG signals; 5V-tolerant I/Os interface directly with legacy lead connectors; 1.2 µA Stop+RTC mode preserves session state between measurements. |
| Industrial Wireless Sensor Node | Asset Tracking Beacon |
Use Scenario: Ruggedized vibration/temperature node mounted on rotating machinery, reporting condition data every 5 minutes via BLE or LoRa. IC Role / Device Role / Timing Role: Edge processing unit executing FFT-based anomaly detection, managing capacitive touch wake-up, and controlling RF transceiver power states. Use Value: 20-capacitive-sensing channels support tamper-detection housing; ultra-low I/O leakage (10 nA) prevents false triggers in dusty environments; 73 GPIOs simplify multi-sensor integration. |
Use Scenario: GPS-denied indoor asset tracker using RSSI-based proximity detection and motion-triggered location logging. IC Role / Device Role / Timing Role: Motion-aware controller using internal comparators for wake-on-vibration, RTC alarm for periodic BLE advertising, and EEPROM for last-known position. Use Value: Comparator window mode detects mechanical shock without CPU wake-up; 0.57 µA Stop mode with 16 wakeup lines enables multi-axis accelerometer event triggering; 9 µA low-power run mode sustains background BLE scanning. |
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 | ARM Cortex-M4F core, 256 KB Flash, no EEPROM, higher active current (80 µA/MHz), FPU support | Better suited for floating-point math (e.g., motor control algorithms), lacks true EEPROM for nonvolatile parameter storage | Select when computational throughput outweighs EEPROM dependency and battery life is secondary to algorithm complexity. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB Flash, 256 KB RAM, no USB, lower standby (0.17 µA), proprietary energy mode sequencing | Optimized for sub-GHz wireless SoC integration (e.g., with Si4463), no native USB or LCD support | Prefer for RF-centric designs where USB connectivity is unnecessary and ultra-deep sleep dominates duty cycle. |
Compared with STM32L151VBT6, STM32L431RCT6 trades EEPROM and ultra-low standby for FPU and larger memory, while EFM32PG12B500F1024GL125 sacrifices USB and analog integration for deeper sleep and RF coexistence - making STM32L151VBT6 optimal for USB-connected, EEPROM-dependent, battery-powered measurement systems.
Availability
STM32L151VBT6 is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L151VBT6 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 ICs, MEMS, and automotive semiconductors since 1987.
The STM32L1 series targets ultra-low-power embedded applications demanding long battery life, robust analog integration, and secure firmware execution - especially in metering, healthcare, and industrial IoT edge nodes.
FAQ
Does STM32L151VBT6 support USB without an external crystal?
Yes. The device integrates a 48 MHz PLL synchronized to the USB Start-of-Frame (SOF) token, enabling crystal-less full-speed USB 2.0 operation. This eliminates the need for an external 48 MHz crystal or oscillator, reducing BOM cost and PCB area while maintaining USB compliance per Section 3.16.4 of the datasheet.
What is the maximum operating temperature range for STM32L151VBT6?
The STM32L151VBT6 is rated for industrial operation from –40°C to +85°C ambient temperature, as confirmed in Table 13 (General Operating Conditions) and Section 6.3.1 of the datasheet. It does not support the +105°C grade offered in some STM32L152 variants.
How many I/O pins are 5V tolerant on STM32L151VBT6?
73 of the 83 I/O pins are 5V tolerant, as explicitly stated in the "Features" section (page 1) and Section 3.6 (GPIOs). This applies to all GPIOs except those in the analog domain (e.g., ADC/DAC pins) and specific system pins like NRST and BOOT0.
Is the 4 KB EEPROM physically separate from Flash memory?
Yes. The 4 KB EEPROM is implemented as a dedicated memory block with independent erase/write control, ECC protection, and 100,000 write/erase cycles (Section 3.7 and Table 35). It is not emulated in Flash and retains data independently during Flash reprogramming.
STM32L151VBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 100-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, 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:
STM32L151VBT6 FAQ
1.How can I place an order for STM32L151VBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151VBT6 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 STM32L151VBT6 reliable?
The price and inventory of STM32L151VBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151VBT6 is usually 5 days.
3.What payment methods are accepted for STM32L151VBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151VBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151VBT6?
STM32L151VBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151VBT6 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 STM32L151VBT6?
For technical support, including STM32L151VBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151VBT6 requirements.
6.How does Aetrix verify that STM32L151VBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L151VBT6 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 STM32L151VBT6 meets industry standards.
7.What is the process for return or replacement of STM32L151VBT6?
All STM32L151VBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151VBT6, 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 STM32L151VBT6 part is unused and in its original packaging.
Return procedure for STM32L151VBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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