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STMicroelectronics STM32L151VET7
- Part No.:
- STM32L151VET7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 100-LQFP
- Datasheet:
-
STM32L151VET7.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 100LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,958
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Product details
Overview
STM32L151VET7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 80 KB SRAM, 16 KB EEPROM with ECC, USB 2.0 interface, and integrated 12-bit ADC (1 Msps, up to 40 channels) and DAC (2 ch). It operates from 1.65 V to 3.6 V across –40 °C to +105 °C and delivers 195 µA/MHz in Run mode - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L151VET7 datasheet, STM32L151VET7 pinout, STM32L151VET7 application, or STM32L151VET7 equivalent, key selection criteria include standby current (290 nA), RTC-enabled Stop mode (1.11 µA), 102 5V-tolerant I/Os, and dual operational amplifiers for sensor signal conditioning - all validated for energy-constrained embedded designs.
Technical Context
The STM32L151VET7 implements a dynamic voltage scaling architecture enabling five low-power modes (Run, Sleep, Low-power Run, Low-power Sleep, Stop, Standby), with hardware-accelerated wake-up from Stop mode in 8 µs and RTC-backed retention in Standby. Its memory subsystem includes dual-bank Flash supporting Read-While-Write (RWW) and ECC protection for both Flash and EEPROM.
Peripherals are tightly coupled to the Cortex-M3 core via AHB/APB buses: the USB 2.0 interface uses an internal 48 MHz PLL; the 12-bit ADC supports oversampling and hardware-calibrated temperature sensing; and two ultra-low-power comparators provide window monitoring with independent wake-up capability on any of 16 lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3, 32-bit, up to 32 MHz - enables deterministic real-time control with MPU for memory partitioning. |
| Flash Memory | 512 KB with ECC and RWW - allows firmware updates without halting operation and prevents silent corruption in field deployments. |
| SRAM | 80 KB - sufficient for complex sensor fusion algorithms and USB descriptor buffers in standalone devices. |
| EEPROM | 16 KB true EEPROM with ECC - retains calibration data and device configuration across 400k write cycles without external NV memory. |
| Low-Power Standby | 290 nA (3 wakeup pins) - extends coin-cell battery life to >10 years in maintenance-free IoT endpoints. |
| ADC | 12-bit, 1 Msps, up to 40 channels - supports simultaneous sampling of multi-sensor arrays (e.g., thermocouple, pressure, humidity) with hardware oversampling. |
| DAC | 2-channel, 12-bit with output buffers - generates precise analog control signals (e.g., bias voltages, reference levels) without external op-amps. |
| USB Interface | Full-speed USB 2.0 with internal 48 MHz PLL - eliminates need for external crystal, reducing BOM cost and PCB footprint. |
Pinout & Package
LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 100 leads - compatible with standard reflow profiles and manual inspection; 102 fast I/Os (100 accessible in LQFP100) include 16 external interrupt vectors and 5V tolerance on most pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Core & I/O power supply | Separate analog/digital domains enable noise isolation; 1.65–3.6 V range supports single-cell Li-ion or dual-cell alkaline operation. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 102 total I/Os (100 available in LQFP100); all mappable to 16 EXTI lines - simplifies PCB routing for multi-interrupt sensor systems. |
| PA1, PA2, PA3 | USART2 TX/RX/CTS | Hardware flow control support enables robust RS-485 or modem communication without CPU overhead. |
| PA11, PA12 | USB DM/DP | Integrated transceivers and pull-up resistors eliminate external components - reduces bill-of-materials for USB-CDC implementations. |
| PC0–PC5 | ADC1 IN0–IN5 | Dedicated analog inputs with programmable sampling time - supports direct connection of resistive sensors (e.g., RTDs, potentiometers) without signal conditioning. |
| PA4, PA5 | DAC1_OUT1, DAC2_OUT2 | Buffered outputs drive 5 kΩ loads directly - suitable for precision actuator control (e.g., valve positioning, laser diode bias). |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power modes | 290 nA Standby (3 wakeup pins), 1.11 µA Standby+RTC, 560 nA Stop (16 wakeup lines) - enables decade-long battery life in metering and environmental monitors. |
| Embedded ECC | On 512 KB Flash and 16 KB EEPROM - prevents undetected bit flips in safety-critical firmware and calibration storage without software overhead. |
| Capacitive touch sensing | Up to 34 channels with hardware-accelerated acquisition - supports slider, wheel, and proximity detection in wearable HMI without external ICs. |
| Internal clock sources | 16 MHz RC (±1%), 37 kHz LPO, 65 kHz–4.2 MHz MSI - eliminates external crystals for cost-sensitive applications while maintaining RTC accuracy via LSE calibration. |
| Operational amplifiers | 2x rail-to-rail, unity-gain stable - condition low-amplitude sensor outputs (e.g., strain gauges, thermopiles) before ADC conversion with <1 µV offset drift. |
| Temperature sensor | Calibrated ±1.5 °C accuracy (–40 to 85 °C) - enables self-diagnostic thermal management in sealed enclosures without external sensors. |
Applications
| Portable Medical Sensor | Smart Utility Meter |
|---|---|
Use Scenario: Wearable ECG patch continuously acquiring biopotential signals with Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Main controller managing analog front-end (op-amps, ADC), real-time filtering, USB charging negotiation, and RTC-scheduled BLE advertising intervals. Use Value: 195 µA/MHz Run mode and 1.11 µA Standby+RTC extend CR2032 battery life beyond 6 months; integrated DAC calibrates electrode offset. |
Use Scenario: Battery-backed water/gas meter logging consumption every 15 minutes and transmitting via NB-IoT. IC Role / Device Role / Timing Role: System-on-chip handling metrology ADC sampling, EEPROM-based tamper logs, secure boot, and low-power timer-triggered modem wake-up. Use Value: 290 nA Standby mode ensures >15-year battery life; 16 KB EEPROM stores 10+ years of hourly usage data with ECC integrity. |
| Industrial Data Logger | Asset Tracking Beacon |
Use Scenario: Ruggedized enclosure logging vibration, temperature, and humidity in remote pump stations. IC Role / Device Role / Timing Role: Central MCU interfacing MEMS accelerometers, thermistors, and SD card via SPI; manages deep-sleep cycles between 10-second acquisitions. Use Value: 8 µs wake-up from Stop mode minimizes latency in event-triggered capture; 102 5V-tolerant I/Os simplify interface to legacy 5V sensors. |
Use Scenario: GPS-less indoor asset tracker using RSSI triangulation and motion-triggered BLE beaconing. IC Role / Device Role / Timing Role: Ultra-low-power host controlling accelerometer wake-up, BLE stack timing, and flash-based location history buffer. Use Value: 560 nA Stop mode with 16 wakeup lines enables motion-detection at <1 µA average current; CRC unit validates firmware OTA updates. |
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 | ARM Cortex-M4F core, 200 µA/MHz Run, 80 KB SRAM, no EEPROM, 1 MB Flash - adds FPU but removes true EEPROM and LCD driver. | Suitable for floating-point sensor fusion; lacks EEPROM for long-term calibration storage without external FRAM. | Select when algorithmic complexity demands FPU or higher clock speed; avoid if EEPROM-based field calibration is mandatory. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1.4 µA Stop mode, 256 KB Flash, 32 KB RAM, no USB, no DAC - lower standby than STM32L151 but missing integrated peripherals. | Better for sub-µA always-on sensing nodes; requires external USB PHY and DAC for connectivity/analog output. | Choose for extreme energy budgets where USB/DAC are handled externally; not drop-in due to pinout and peripheral mismatch. |
Compared with STM32L151VET7, the STM32L431RCT6 trades EEPROM and ultra-low standby for FPU and higher performance, while the EFM32PG12B500F1024GL125 achieves deeper sleep at the cost of USB integration and analog feature set - making STM32L151VET7 optimal for USB-connected, EEPROM-dependent, battery-operated measurement systems.
Availability
STM32L151VET7 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, and industrial data loggers requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for STM32L151VET7 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, designing and manufacturing microcontrollers, power management ICs, and MEMS sensors 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 - optimized for metering, wearables, and environmental monitoring.
FAQ
Does STM32L151VET7 support USB device mode without an external crystal?
Yes. The STM32L151VET7 integrates a 48 MHz PLL fed by its internal 16 MHz RC oscillator, enabling full-speed USB 2.0 device operation without an external crystal. This is confirmed in Section 3.4 (Clock management) and Table 33 (PLL characteristics) of DS10002 Rev 10, reducing BOM count and layout complexity for USB-CDC or HID implementations.
What is the maximum operating temperature for STM32L151VET7 in industrial applications?
The STM32L151VET7 is rated for continuous operation from –40 °C to +105 °C, as specified in Section 6.3.1 (General operating conditions) and Table 13 of DS10002 Rev 10. This extended temperature range is validated for industrial environments such as motor control cabinets and outdoor utility enclosures.
How many I/O pins are 5V tolerant on the LQFP100 package?
102 I/O pins are 5V tolerant, including all GPIOs except those dedicated to USB (PA11/PA12) and oscillator inputs (PH0/PH1). This is explicitly stated in Section 2.1 (Device overview) and Table 2 of DS10002 Rev 10, enabling direct interfacing with legacy 5V logic and sensors without level shifters.
Is the 16 KB EEPROM truly erasable and writable in-circuit?
Yes. The 16 KB EEPROM is implemented as true embedded EEPROM with ECC, supporting byte/word erase and write operations in-application. Section 3.7 (Memories) and Table 35 confirm endurance of 400,000 cycles and data retention of 20 years at 85 °C - verified for field firmware updates and calibration storage without external memory.
STM32L151VET7 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:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 16K x 8
- RAM Size:
- 80K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 25x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L151VET7 FAQ
1.How can I place an order for STM32L151VET7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151VET7 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 STM32L151VET7 reliable?
The price and inventory of STM32L151VET7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151VET7 is usually 5 days.
3.What payment methods are accepted for STM32L151VET7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151VET7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151VET7?
STM32L151VET7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151VET7 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 STM32L151VET7?
For technical support, including STM32L151VET7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151VET7 requirements.
6.How does Aetrix verify that STM32L151VET7 is sourced from the original manufacturer or authorized distributors?
All STM32L151VET7 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 STM32L151VET7 meets industry standards.
7.What is the process for return or replacement of STM32L151VET7?
All STM32L151VET7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151VET7, 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 STM32L151VET7 part is unused and in its original packaging.
Return procedure for STM32L151VET7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L151VET7 Tags
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