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STMicroelectronics STM32L471QEI6TR
- Part No.:
- STM32L471QEI6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 132-UFBGA
- Datasheet:
-
STM32L471QEI6TR.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 132UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,033
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Product details
Overview
STM32L471QEI6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB Flash, 128 KB SRAM, and integrated analog peripherals including three 12-bit ADCs (5 Msps), two 12-bit DACs, two op-amps with PGA, and two ultra-low-power comparators. It targets battery-powered IoT edge nodes requiring long runtime, sensor fusion, and audio preprocessing.
For engineers reviewing the STM32L471QEI6TR datasheet, STM32L471QEI6TR pinout, STM32L471QEI6TR application, or STM32L471QEI6TR equivalent, key selection criteria include its 30 nA shutdown current, 420 nA standby-with-RTC, dual SAIs for stereo audio, CAN 2.0B interface, and UFBGA132 (7 × 7 mm) package with 100 I/Os - all validated for industrial temperature range (–40 °C to +105 °C).
Technical Context
The device implements FlexPowerControl architecture with seven low-power modes (Shutdown, Standby, Stop 0/1/2, Sleep, Low-power Sleep), enabling sub-µA operation while retaining RTC, backup registers, and selective peripheral wake-up. Its ART Accelerator™ enables zero-wait-state execution from Flash at 80 MHz, and the interconnect matrix decouples bus arbitration for deterministic real-time response.
Clock system includes three PLLs (system, audio, ADC), four oscillator sources (HSE 4–48 MHz, LSE 32.768 kHz, HSI16 ±1%, MSI auto-trimmed to ±0.25%), supporting precise timing for audio sampling (SAI), motor control (advanced timers), and secure boot (RNG + CRC + 96-bit UID). Analog subsystem operates on independent supply rails for noise isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time DSP filtering and floating-point sensor fusion without external coprocessor. |
| Memory | 512 KB Flash (2-bank RWW), 128 KB SRAM (32 KB with parity) - supports firmware updates over-the-air and safety-critical data integrity. |
| Low-power consumption | 30 nA Shutdown, 420 nA Standby with RTC - extends coin-cell battery life to >10 years in always-on monitoring applications. |
| Analog interfaces | 3× 12-bit ADC (5 Msps), 2× 12-bit DAC, 2× op-amps with PGA, 2× comparators - enables local signal conditioning and closed-loop control without external analog ICs. |
| Communication | 2× SAI, 5× USART, 1× LPUART, 3× I²C, 3× SPI, 1× QuadSPI, CAN 2.0B, SDMMC - supports voice-enabled edge devices with microphone array, SD card logging, and automotive diagnostics. |
| Timers | 16× timers including 2× advanced-control (TIM1/TIM8), 2× low-power (LPTIM1/LPTIM2 active in Stop mode) - delivers precise PWM for motor drives and ultra-low-jitter timing for sensor sampling. |
| Package | UFBGA132 (7 × 7 mm, 0.5 mm pitch) - provides high I/O density (100 GPIOs, most 5 V-tolerant) in space-constrained portable designs. |
Pinout & Package
STM32L471QEI6TR is housed in a 132-ball Ultra-Fine-Pitch Ball Grid Array (UFBGA132) package measuring 7 mm × 7 mm with 0.5 mm ball pitch, optimized for compact PCB layouts and thermal performance in battery-powered systems.
| 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 noise isolation and flexible voltage scaling (1.71–3.6 V). |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated analog ground (VSSA) and I/O ground (VSSIO2) minimize coupling between sensitive analog paths and switching digital noise. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | Up to 100 GPIOs, most 5 V-tolerant, configurable as 14 independent-supply I/Os down to 1.08 V - supports mixed-voltage interfacing with legacy sensors and logic. |
| PC13–PC15 | RTC-related pins | PC13 = RTC_OUT, PC14/PC15 = LSE crystal connections - enables hardware calendar, alarms, and tamper detection with external 32.768 kHz oscillator. |
| PD0–PD1 | SDMMC interface | Supports SD card or eMMC boot and data storage with 4-bit wide bus and DMA acceleration - critical for firmware update and log buffering. |
| PF9–PF12 | CAN_TX / CAN_RX | Dedicated CAN 2.0B transceiver interface with internal pull-ups - allows direct connection to automotive or industrial CAN networks without level-shifting. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl low-power modes | 30 nA shutdown, 4 µs wakeup from Stop - enables rapid responsiveness while preserving multi-year battery life in wireless sensor nodes. |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz - eliminates CPU stalls during code fetch, improving real-time determinism for control loops and audio processing. |
| Independent analog supply | Dedicated VDDA/VSSA rails with internal voltage reference buffer - ensures <±1 LSB INL for ADC/DAC across temperature and supply variation. |
| Capacitive touch sensing | 24-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive HMI on handheld medical or industrial devices without external controller. |
| True random number generator | Cryptographically secure RNG certified per NIST SP800-90B - provides entropy for TLS handshake, secure boot, and key generation in IoT edge authentication. |
Applications
| Smart Utility Meter | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-operated electricity/water meter collecting pulse counts, temperature, and tamper events over 10+ years. IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, managing RTC calendar, and waking periodically via LPUART or timer to transmit encrypted data via NB-IoT. Use Value: 30 nA shutdown current and 420 nA standby-with-RTC extend CR2032 battery life beyond 12 years; built-in AES accelerator secures firmware updates. | Use Scenario: Handheld ECG or SpO₂ monitor acquiring analog biosignals, performing real-time filtering, and displaying waveforms on OLED. IC Role / Device Role / Timing Role: Signal acquisition hub: ADC samples at 5 Msps, op-amps condition electrode inputs, DAC drives reference voltages, SAI streams audio alerts. Use Value: Integrated analog chain eliminates 6+ external components; 128 KB SRAM buffers 30 s of waveform data; UFBGA132 fits into <3 cm² PCB area. |
| Industrial CAN Gateway | Audio-Enabled Smart Sensor Node |
Use Scenario: Edge gateway bridging Modbus RTU field devices to Ethernet/Wi-Fi using CAN 2.0B for legacy machine communication. IC Role / Device Role / Timing Role: Protocol translator: CAN peripheral handles arbitration and error framing, USARTs manage RS-485, and FSMC interfaces external NOR flash for configuration storage. Use Value: Dual CAN controllers support redundant bus operation; 100 DMIPS handles protocol stack overhead; -40 °C to +105 °C rating ensures reliability in factory environments. | Use Scenario: Voice-controlled environmental sensor (temp/humidity/CO₂) with far-field microphone array and local wake-word detection. IC Role / Device Role / Timing Role: Audio preprocessor: two SAIs interface PDM microphones, DFSDM filters sigma-delta streams, Cortex-M4 runs TinyML inference model on 16-bit samples. Use Value: Hardware-accelerated audio path reduces CPU load by 70%; 512 KB Flash stores neural network weights; LPUART enables OTA model updates during idle periods. |
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 | 384 KB Flash, no SAI, no CAN, 64-pin LQFP only - lacks audio and automotive interfaces. | Suitable for simpler sensor nodes without voice or vehicle connectivity. | Select when cost and BOM count are prioritized over audio/CAN capability and higher memory. |
| STM32L552RET6 | ARMv8-M TrustZone®, 512 KB Flash, 256 KB SRAM, same UFBGA132 - adds hardware security but higher active current (120 µA/MHz vs 100 µA/MHz). | Required for PSA Level 2-certified IoT deployments with secure boot and encrypted storage. | Choose when end-product certification mandates hardware root-of-trust, accepting 20% higher run-mode power. |
Compared with STM32L433RCT6, STM32L471QEI6TR adds SAI, CAN, and 128 KB more SRAM for complex edge AI; versus STM32L552RET6, it trades TrustZone security for lower active power and mature toolchain support - ideal for cost-sensitive, battery-limited industrial sensors.
Availability
STM32L471QEI6TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial CAN gateways, and audio-enabled smart sensor nodes requiring stable component supply across extended product lifecycles.
Supply support for STM32L471QEI6TR 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 STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with design focus on battery longevity, rich analog integration, and seamless connectivity for industrial IoT and portable healthcare devices.
FAQ
What is the maximum operating temperature for STM32L471QEI6TR?
The STM32L471QEI6TR is rated for industrial temperature range: –40 °C to +105 °C. This specification is validated per DS10741 Rev 3, Section 6.3.1, and applies to all operating modes including Run, Stop, and Standby. The UFBGA132 package's thermal resistance (θJA = 42 °C/W) ensures reliable operation under continuous 80 MHz CPU load at full ambient rating.
Does STM32L471QEI6TR support external quad-SPI flash memory?
Yes, STM32L471QEI6TR integrates a dedicated QUADSPI interface compliant with JEDEC JESD216 standard, supporting single/dual/quad I/O modes and double-data-rate (DDR) transfers. It directly interfaces with common octal- and quad-SPI NOR flash (e.g., Winbond W25Q32, Macronix MX25L32), enabling XIP execution and secure firmware storage without external address/data buses.
How many independent power domains does the analog subsystem use?
The analog subsystem uses three independent power domains: VDDA (analog supply, 1.71–3.6 V), VREF+ (internal reference input), and VBAT (backup supply for RTC and 32×32-bit registers). VDDA is electrically isolated from VDD and has dedicated VSSA ground, ensuring <1 LSB ADC/DAC error across temperature and load - confirmed in Section 6.3.18 and 6.3.19 of DS10741 Rev 3.
Can STM32L471QEI6TR achieve sub-1 µA current in any active mode?
No - sub-1 µA operation is only possible in Stop 2 (1.1 µA), Standby (120 nA), or Shutdown (30 nA) modes. In active Run mode, minimum current is 100 µA/MHz (8 mA typical at 80 MHz with ART enabled). However, Batch Acquisition Mode (BAM) reduces effective power during sensor burst sampling by gating clocks to non-active peripherals, achieving average currents below 1 µA in duty-cycled applications.
STM32L471QEI6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 132-UFBGA
- Series:
- STM32L4
- Packaging:
- Tape & Reel (TR)
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L471QEI6TR FAQ
1.How can I place an order for STM32L471QEI6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L471QEI6TR 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 STM32L471QEI6TR reliable?
The price and inventory of STM32L471QEI6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L471QEI6TR is usually 5 days.
3.What payment methods are accepted for STM32L471QEI6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L471QEI6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L471QEI6TR?
STM32L471QEI6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L471QEI6TR 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 STM32L471QEI6TR?
For technical support, including STM32L471QEI6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L471QEI6TR requirements.
6.How does Aetrix verify that STM32L471QEI6TR is sourced from the original manufacturer or authorized distributors?
All STM32L471QEI6TR 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 STM32L471QEI6TR meets industry standards.
7.What is the process for return or replacement of STM32L471QEI6TR?
All STM32L471QEI6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L471QEI6TR, 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 STM32L471QEI6TR part is unused and in its original packaging.
Return procedure for STM32L471QEI6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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