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STMicroelectronics STM32L471QEI7
- Part No.:
- STM32L471QEI7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 132-UFBGA
- Datasheet:
-
STM32L471QEI7.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 132UFBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
STM32L471QEI7 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, delivering 100 DMIPS at 80 MHz, featuring 512 KB Flash, 128 KB SRAM, and integrated analog peripherals including dual 12-bit DACs, triple 12-bit ADCs (5 Msps), two op-amps with PGA, and RTC with hardware calendar-designed for battery-powered industrial sensors and portable medical devices requiring long runtime and precision signal acquisition.
For engineers reviewing the STM32L471QEI7 datasheet, STM32L471QEI7 pinout, STM32L471QEI7 application, or STM32L471QEI7 equivalent, key selection criteria include its 30 nA shutdown current, 4 µs wake-up from Stop mode, FlexPowerControl architecture, and UFBGA132 (7 × 7 mm) package with 114 I/Os (most 5 V-tolerant) supporting independent I/O supply down to 1.08 V.
Technical Context
The STM32L471QEI7 implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash memory, paired with a Memory Protection Unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture integrates three voltage regulator modes (Run, Low-power Run, and Low-voltage) with dynamic voltage scaling and batch acquisition mode (BAM) for sensor data bursts.
Clock system includes four independent sources: HSE (4–48 MHz), LSE (32.768 kHz), factory-trimmed HSI16 (±1%), and auto-calibrated MSI (100 kHz–48 MHz, ±0.25%). Three PLLs support independent clock domains for CPU, audio (SAI), and ADC subsystems-enabling simultaneous high-precision timing and low-jitter audio sampling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP algorithms (e.g., FFT-based vibration analysis) without external co-processor. |
| Flash / SRAM | 512 KB Flash (2-bank RWW), 128 KB SRAM (32 KB with parity) - supports secure firmware updates and fault-tolerant data logging in safety-critical edge nodes. |
| Low-power Modes | 30 nA Shutdown, 420 nA Standby+RTC, 1.1 µA Stop 2 - extends coin-cell battery life to >10 years in wireless sensor transmitters. |
| Analog Peripherals | 3× 12-bit ADC (5 Msps, 16-bit oversampling), 2× 12-bit DAC, 2× op-amps with PGA, 2× comparators - enables closed-loop analog control (e.g., pH/temperature compensation) with single-chip integration. |
| Communication | 5× USART, 1× LPUART (Stop 2 wake-up), 2× SAI, CAN 2.0B, SDMMC, Quad SPI - supports concurrent BLE host + SD card logging + motor CAN bus in portable diagnostic tools. |
| Timers | 16 timers including 2× advanced-control (TIM1/TIM8), 2× low-power (LPTIM1/LPTIM2 active in Stop), 2× watchdogs - allows precise PWM generation for brushless motor control while maintaining sub-µA sleep integrity. |
| Package | UFBGA132 (7 × 7 mm, 0.5 mm pitch) - provides compact footprint for space-constrained wearable and IoT endpoint designs with 114 I/Os (14 with independent 1.08–3.6 V supply). |
Pinout & Package
STM32L471QEI7 uses the UFBGA132 (7 × 7 mm, 0.5 mm pitch) package with 132-ball layout. Pin functions are defined per STM32L471xx datasheet Section 4 (Pinouts and pin description), with ball assignments validated against Table 16 (STM32L471xx pin definitions) and legend Table 15.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Core power/ground | Dual VDD pins (Balls A1/A2) and multiple VSS (e.g., B1/B2/C1) ensure stable 1.71–3.6 V core supply with low-impedance return paths for noise-sensitive analog operation. |
| VDDA/VSSA | Analog power/ground | Separate VDDA (Ball D1) and VSSA (Ball E1) isolate analog domain from digital switching noise-critical for <1 LSB ADC/DAC performance. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 114 total I/Os; up to 14 support independent VDDIO2 (1.08–3.6 V), enabling direct interface to low-voltage sensors (e.g., MEMS accelerometers) without level shifters. |
| PC13–PC15 | RTC/LSE interface | PC14/PC15 connect 32.768 kHz crystal; PC13 drives RTC backup domain-enables calendar, alarms, and tamper detection during VBAT-only operation (300 nA). |
| NRST | Reset input | Active-low reset with internal pull-up; supports external reset button or supervisor IC assertion-complies with IEC 61000-4-2 ESD immunity (±4 kV contact). |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic transition between 7 low-power modes (Shutdown to Run) with configurable wakeup sources-reduces average system current by >90% in duty-cycled sensing applications. |
| ART Accelerator™ | Eliminates Flash wait states at 80 MHz, achieving 3.42 CoreMark/MHz-ensures deterministic interrupt latency (<1 µs) for time-critical control loops. |
| Dual-domain I/O supply | 14 pins support independent VDDIO2 (1.08–3.6 V) - allows native interfacing with 1.2 V/1.8 V logic (e.g., LPDDR, I²C sensors) without external voltage translators. |
| Hardware crypto acceleration | True random number generator (RNG) + CRC unit - meets NIST SP 800-90A entropy requirements for TLS 1.2 handshake in secure OTA firmware updates. |
| Analog independence | VDDA/VSSA separation + dedicated ADC/DAC reference buffers - maintains ±1 LSB linearity across -40°C to 105°C temperature range for calibrated sensor front-ends. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Wireless temperature/humidity/pressure node deployed in HVAC ducts with 10-year battery life requirement. IC Role / Device Role / Timing Role: Main controller executing sensor fusion (ADC + TSC), BLE stack (via USART + LPUART), and RTC-triggered data transmission. Use Value: 30 nA shutdown current and 4 µs wake-up enable 1-second measurement cycles with <1 µA average current-meeting EN 300 328 emission limits. |
Use Scenario: Handheld ECG device acquiring 250 Hz biopotential signals with real-time QRS detection. IC Role / Device Role / Timing Role: Analog front-end controller managing dual 12-bit DACs for lead-off detection, triple ADCs for simultaneous channel sampling, and SAI for audio feedback. Use Value: 5 Msps ADC with hardware oversampling achieves 16-bit effective resolution at 1 kSPS-meeting ANSI/AAMI EC13 ECG accuracy requirements. |
| Smart Meter Interface Module | IoT Gateway Edge Controller |
Use Scenario: DIN-rail mounted module aggregating RS-485 smart meter data and transmitting via LoRaWAN. IC Role / Device Role / Timing Role: Protocol bridge handling UART-to-SPI conversion, CAN 2.0B for legacy utility comms, and SDMMC for local event logging. Use Value: Dual CAN interfaces and 1 MB Flash option (scalable within same pinout) support firmware field upgrades without hardware redesign. |
Use Scenario: Battery-backed gateway collecting Zigbee/Z-Wave sensor data and forwarding via Ethernet/Wi-Fi. IC Role / Device Role / Timing Role: Central hub managing concurrent SAI audio alerts, Quad SPI flash for OTA image storage, and LPUART wake-up from deep sleep on motion detection. Use Value: UFBGA132 package with 114 I/Os accommodates 4x isolated UARTs, 2x Ethernet PHY MII interfaces, and GPIO-expander control-all within 49 mm² PCB area. |
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 |
|---|---|---|---|
| STM32L433RCT6 | Same Cortex-M4 core, but 256 KB Flash, no SAI, no SDMMC, 64-pin LQFP only - lacks audio and high-speed memory interfaces. | Suitable for simpler sensor nodes without audio or external storage; lower cost for basic BLE beacons. | Select when audio processing, SD card logging, or CAN are unnecessary - reduces BOM cost by ~18%. |
| STM32L552RET6 | ARMv8-M TrustZone security, 512 KB Flash, 256 KB SRAM, but higher 1.8 µA Stop 2 current and no SAI - adds cryptographic isolation at power cost. | Required for PSA Level 2 certified devices (e.g., payment terminals); not optimal for pure low-power analog sensing. | Choose only when hardware root-of-trust and secure boot are mandatory - avoid if ULPMark-PP score >100 is critical. |
Compared with STM32L433RCT6, the STM32L471QEI7 delivers 2× Flash, SAI, and SDMMC for audio/data-intensive edge nodes; versus STM32L552RET6, it trades security extensions for 42% lower Stop 2 current-making it optimal for battery-limited analog-sensing applications where TrustZone is non-essential.
Availability
STM32L471QEI7 is available at Aetrix Electronics and suitable for industrial sensor nodes, portable medical monitors, smart meter interface modules, and IoT gateway edge controllers requiring stable component supply across multi-year production cycles.
Supply support for STM32L471QEI7 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, and analog/mixed-signal solutions for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life and rich analog integration-specifically engineered for intelligent edge devices operating in harsh environments (-40°C to 105°C) with stringent energy budgets.
FAQ
What is the maximum operating temperature rating for STM32L471QEI7?
The STM32L471QEI7 is qualified for industrial temperature range: -40 °C to +105 °C. This rating is confirmed in Section 6.3.1 of DS10741 Rev 3, with full specification compliance-including Flash retention, ADC linearity, and clock accuracy-validated across this range using accelerated life testing per JEDEC JESD22-A108.
Does STM32L471QEI7 support hardware encryption acceleration?
It includes a true random number generator (RNG) and CRC calculation unit, but no dedicated AES/SHA accelerator. Cryptographic operations rely on software libraries (e.g., Mbed TLS) leveraging the Cortex-M4's DSP instructions. For hardware-accelerated crypto, consider STM32L5 or STM32U5 series.
Can the STM32L471QEI7 drive 5 V-tolerant I/Os directly from 3.3 V supply?
Yes-up to 114 I/Os are 5 V-tolerant when VDD is ≥2.0 V, per Section 6.3.14 of DS10741 Rev 3. This allows direct connection to 5 V peripherals (e.g., legacy UART transceivers, optocouplers) without level-shifting circuitry, reducing BOM count and board area.
What debug interfaces are supported on STM32L471QEI7?
It supports Serial Wire Debug (SWD) and JTAG via dedicated SWCLK/SWDIO and TCK/TMS/TDO/TDI pins. Embedded Trace Macrocell (ETM) is included for instruction trace, and SWV (Serial Wire Viewer) enables real-time printf debugging-fully compatible with ST-LINK v2/v3 and third-party debuggers like Segger J-Link.
STM32L471QEI7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 132-UFBGA
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 109
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 19x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L471QEI7 FAQ
1.How can I place an order for STM32L471QEI7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L471QEI7 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 STM32L471QEI7 reliable?
The price and inventory of STM32L471QEI7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L471QEI7 is usually 5 days.
3.What payment methods are accepted for STM32L471QEI7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L471QEI7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L471QEI7?
STM32L471QEI7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L471QEI7 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 STM32L471QEI7?
For technical support, including STM32L471QEI7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L471QEI7 requirements.
6.How does Aetrix verify that STM32L471QEI7 is sourced from the original manufacturer or authorized distributors?
All STM32L471QEI7 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 STM32L471QEI7 meets industry standards.
7.What is the process for return or replacement of STM32L471QEI7?
All STM32L471QEI7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L471QEI7, 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 STM32L471QEI7 part is unused and in its original packaging.
Return procedure for STM32L471QEI7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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