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STMicroelectronics STM32L151QEH6
- Part No.:
- STM32L151QEH6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 132-UFBGA
- Datasheet:
-
STM32L151QEH6.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 132UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:4,458
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Product details
Overview
STM32L151QEH6 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 12-bit ADC (1 Msps, up to 40 channels). 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 STM32L151QEH6 datasheet, STM32L151QEH6 pinout, STM32L151QEH6 application, or STM32L151QEH6 equivalent, key selection criteria include standby current (290 nA), RTC-enabled Stop mode (1.11 µA), 102 I/Os (5V tolerant), dual 12-bit DACs with buffers, and integrated op-amps for sensor signal conditioning.
Technical Context
The STM32L151QEH6 integrates a Cortex-M3 core running at up to 32 MHz with MPU, dynamic voltage scaling, and five low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby). Its power architecture includes ultrasafe BOR with five thresholds, programmable PVD, and internal oscillators (HSI ±1%, LSI, MSI 65 kHz–4.2 MHz, LSE 32.768 kHz).
Analog subsystem comprises two rail-to-rail op-amps, two ultra-low-power comparators with window mode and wake-up capability, 12-bit ADC with 40-channel multiplexing and internal temperature sensor/VREFINT, and dual buffered 12-bit DACs - all functional down to 1.8 V supply.
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 1.25 DMIPS/MHz performance. |
| Memory | 512 KB Flash (ECC, dual-bank RWW), 80 KB SRAM, 16 KB EEPROM (ECC) - supports firmware updates without interruption and data retention in low-power states. |
| Power Consumption | 290 nA Standby (3 wakeup pins), 1.11 µA Standby+RTC, 560 nA Stop (16 wakeup lines) - extends battery life in multi-year deployments. |
| Analog Peripherals | 12-bit ADC (1 Msps, 40 ch), 2×12-bit DAC (buffered), 2×op-amps, 2×comparators - enables precision sensor acquisition and analog output generation on-chip. |
| Communication | 1×USB 2.0 (48 MHz PLL), 5×USART, up to 8×SPI (2×I2S), 2×I2C (SMBus/PMBus) - provides flexible connectivity for host interfaces and sensor networks. |
| I/O & Timers | 116 fast I/Os (102 5V tolerant), 1×32-bit + 6×16-bit timers (up to 4 PWM/IC/OC), 2×watchdogs - supports complex peripheral control and timing-critical functions. |
Pinout & Package
LQFP100 package (14 × 14 mm, 0.5 mm pitch), 100-pin quad flat pack with exposed thermal pad - suitable for automated assembly and thermal management in compact industrial modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Core, analog, and I/O power supplies | Independent 1.65–3.6 V domains enable noise isolation between digital logic and precision analog circuits. |
| VSS, VSSA | Digital and analog ground returns | Separate analog/digital ground pins reduce coupling noise into ADC/DAC paths. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 102 pins 5V tolerant - simplifies level-shifting in mixed-voltage systems interfacing with legacy peripherals. |
| PA1, PA2, PA3 | USART2 TX/RX/CK | Dedicated hardware USART signals - offloads CPU during serial telemetry transmission in remote monitoring nodes. |
| PA4–PA7 | ADC1_IN0–IN3 | Direct analog input channels - support simultaneous sampling of multiple sensor outputs without external muxing. |
| PA4, PA5 | DAC_OUT1, DAC_OUT2 | Buffered voltage outputs - drive resistive loads (e.g., potentiometer emulators, biasing circuits) without external op-amp stages. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 290 nA Standby, 8 µs wakeup - enables rapid response to intermittent events while preserving multi-year battery life. |
| On-chip EEPROM with ECC | 16 KB true EEPROM (not emulated) with error correction - ensures reliable nonvolatile storage of calibration data and device configuration. |
| Capacitive touch sensing | Up to 34 channels - eliminates mechanical buttons in handheld HMI designs and reduces BOM cost vs. external touch controllers. |
| Hardware CRC unit | Dedicated 32-bit CRC engine - accelerates firmware integrity checks and communication packet validation without CPU overhead. |
| Pre-programmed bootloader | USB and USART support - enables field firmware updates without JTAG debugger, reducing service logistics complexity. |
Applications
| Wearable Health Monitor | Smart Gas Detector |
|---|---|
Use Scenario: Continuous ECG/PPG acquisition with Bluetooth LE telemetry in coin-cell-powered wrist-worn devices. IC Role / Device Role / Timing Role: Main controller managing analog front-end (op-amps, ADC), real-time signal processing, USB/USART firmware updates, and RTC-triggered periodic wakeups. Use Value: 290 nA Standby + 8 µs wakeup allows >3-year battery life while maintaining responsiveness to heart-rate anomalies. |
Use Scenario: Portable combustible gas analyzer using electrochemical sensors requiring stable bias voltage and low-noise signal conditioning. IC Role / Device Role / Timing Role: Analog hub providing dual DAC-controlled sensor bias, 12-bit ADC digitization, comparator-based alarm threshold detection, and UART reporting. Use Value: Integrated op-amps and 1.11 µA Stop+RTC mode eliminate external signal-chain components and extend operational time between charges. |
| Industrial Data Logger | Low-Power Smart Meter |
Use Scenario: Temperature/humidity/pressure logging in unattended outdoor enclosures powered by solar-charged Li-ion batteries. IC Role / Device Role / Timing Role: System-on-chip handling sensor polling via SPI/I2C, timestamping with RTC+backup registers, encrypted Flash storage, and periodic GSM upload. Use Value: 512 KB ECC Flash + 16 KB EEPROM enables secure firmware rollback and long-term calibration history retention without external memory. |
Use Scenario: ANSI C12.19-compliant electricity meter with tamper detection, metrology ADC interface, and optical/IR communication port. IC Role / Device Role / Timing Role: Secondary controller managing LCD driver (not present in QEH6 variant), pulse counting, secure boot, and low-power wake-on-event for tariff switching. Use Value: 10 nA I/O leakage and 560 nA Stop mode ensure minimal self-discharge during grid outages, preserving meter state for >10 years. |
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 (FPU), 256 KB Flash, 64 KB SRAM, no EEPROM, higher active current (100 µA/MHz) | Requires external EEPROM for calibration storage; better suited for floating-point sensor fusion but less optimal for pure low-power data logging. | Select when DSP-intensive algorithms (e.g., FFT-based vibration analysis) outweigh EEPROM dependency and standby current penalties. |
| STM32L071RBT6 | Cortex-M0+, 128 KB Flash, 20 KB RAM, 6 KB EEPROM, lower max clock (32 MHz same), 360 nA Standby | Lower peripheral count (no USB, single DAC, fewer timers); adequate for simple sensor nodes but lacks USB/RTC+backup register depth. | Select for cost-sensitive, functionally minimal designs where USB connectivity and dual DACs are unnecessary. |
Compared with STM32L151QEH6, the STM32L431RCT6 trades EEPROM and ultra-low standby for FPU and higher performance, while the STM32L071RBT6 reduces feature set and increases standby current - making the QEH6 optimal for EEPROM-dependent, USB-equipped, sub-µA standby applications.
Availability
STM32L151QEH6 is available at Aetrix Electronics and suitable for wearable health monitors, smart gas detectors, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and full production status per STMicroelectronics DS10002 Rev 10 (April 2021).
Supply support for STM32L151QEH6 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, robust analog integration, and industrial-grade reliability - optimized for portable medical, environmental sensing, and metering systems.
FAQ
Does STM32L151QEH6 support USB device mode with internal 48 MHz PLL?
Yes. The STM32L151QEH6 integrates a full-speed USB 2.0 device interface with an internal 48 MHz PLL fed from the HSI or MSI oscillator. It supports CDC, HID, and MSC class drivers without external crystal, verified in ST's UM1722 reference manual and AN4251 application note.
What is the maximum number of capacitive sensing channels supported?
The STM32L151QEH6 supports up to 34 capacitive sensing channels using its built-in touch sensing controller (TSC), confirmed in Section 3.15 of DS10002 Rev 10. Channel count depends on GPIO mapping and does not require external ICs or firmware overhead.
Is the 16 KB EEPROM physically separate from Flash memory?
Yes. The 16 KB EEPROM is a dedicated silicon block with ECC protection, electrically erasable in byte/word granularity, and independently managed from the 512 KB Flash array - enabling concurrent read/write operations and guaranteed 100k write cycles per byte per DS10002 Section 6.3.9.
Can the op-amps be configured as transimpedance amplifiers for photodiode interfaces?
Yes. Both op-amps support rail-to-rail input/output, unity-gain stability, and configurable gain via external feedback networks. ST Application Note AN4438 demonstrates transimpedance configurations with bandwidth optimization and noise reduction techniques specific to STM32L151xE devices.
STM32L151QEH6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 132-UFBGA
- 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:
- 109
- 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 40x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L151QEH6 FAQ
1.How can I place an order for STM32L151QEH6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151QEH6 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 STM32L151QEH6 reliable?
The price and inventory of STM32L151QEH6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151QEH6 is usually 5 days.
3.What payment methods are accepted for STM32L151QEH6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151QEH6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151QEH6?
STM32L151QEH6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151QEH6 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 STM32L151QEH6?
For technical support, including STM32L151QEH6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151QEH6 requirements.
6.How does Aetrix verify that STM32L151QEH6 is sourced from the original manufacturer or authorized distributors?
All STM32L151QEH6 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 STM32L151QEH6 meets industry standards.
7.What is the process for return or replacement of STM32L151QEH6?
All STM32L151QEH6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151QEH6, 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 STM32L151QEH6 part is unused and in its original packaging.
Return procedure for STM32L151QEH6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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