My Inquiry
My Account
STMicroelectronics STM32L471QEI6
- Part No.:
- STM32L471QEI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 132-UFBGA
- Datasheet:
-
STM32L471QEI6.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 132UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,412
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32L471QEI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 80 MHz max frequency, 512 KB Flash, 128 KB SRAM, and integrated analog peripherals including dual 12-bit DACs, triple 12-bit ADCs (5 Msps), two op-amps, and two ultra-low-power comparators - deployed in battery-powered medical sensors and portable industrial data loggers requiring sub-μA standby operation.
For engineers reviewing the STM32L471QEI6 datasheet, STM32L471QEI6 pinout, STM32L471QEI6 application, or STM32L471QEI6 equivalent, key selection criteria include its 30 nA shutdown current, 420 nA RTC-enabled standby mode, FlexPowerControl architecture, and UFBGA132 (7 × 7 mm) package with 100 I/Os - critical for space-constrained, energy-harvesting edge nodes.
Technical Context
The STM32L471QEI6 implements an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from Flash at 80 MHz, paired with a Memory Protection Unit (MPU) and interconnect matrix for deterministic peripheral arbitration. Its power architecture integrates three voltage regulator modes (Run/Stop/Standby) and supports batch acquisition mode (BAM) for sensor hub preprocessing without CPU wake-up.
It features dual PLLs - one for system clock (up to 80 MHz), another dedicated to audio (SAI) - alongside four digital filters for sigma-delta modulators (DFSDM), independent analog supply domains, and hardware parity on 32 KB of SRAM for functional safety compliance in IEC 61508 SIL-2–targeted designs.
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 control loop execution in under 12.5 µs per iteration. |
| Flash / SRAM | 512 KB Flash (2-bank read-while-write), 128 KB SRAM (32 KB with hardware parity) - supports secure firmware updates and ASIL-B–compliant RAM integrity checking. |
| Low-power Modes | 30 nA Shutdown, 420 nA Standby+RTC, 1.1 µA Stop 2 - extends coin-cell battery life to >10 years in periodic-sensing applications. |
| Analog Peripherals | 3× 12-bit ADC (5 Msps, 16-bit oversampling), 2× 12-bit DAC, 2× op-amps (PGA), 2× comparators - enables closed-loop analog signal conditioning without external components. |
| Communication | 5× USART, 1× LPUART (Stop 2 wake-up), 2× SAI, CAN 2.0B, SDMMC, Quad SPI - supports simultaneous BLE coexistence, audio streaming, and fieldbus connectivity. |
| Package | UFBGA132 (7 × 7 mm, 0.5 mm pitch) - provides 100 I/Os in footprint smaller than LQFP100, suitable for wearable and implantable form factors. |
| Security | True RNG, CRC unit, 96-bit unique ID, ROP/PCROP protection - meets requirements for secure boot and device identity in IoT endpoint authentication. |
Pinout & Package
UFBGA132 (7 × 7 mm, 0.5 mm pitch) with 132-ball layout; thermal pad exposed on underside for enhanced heat dissipation in sealed enclosures. Pin functions validated per STMicroelectronics DS10741 Rev 3, Section 4 ("Pinouts and pin description").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate domains for digital core (1.71–3.6 V), analog (1.62–3.6 V), and I/O (1.08–3.6 V) - enable mixed-voltage system integration and noise isolation. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | Up to 100 5 V-tolerant pins; 14 support independent 1.08 V supply - allow direct interface with low-voltage sensors and legacy 5 V peripherals. |
| PC13–PC15 | RTC-related pins | PC13 = RTC_OUT, PC14/PC15 = LSE crystal connections - enable hardware calendar and tamper detection with <1 µA RTC current draw. |
| PA2/PA3 | USART2_TX/RX | Support LIN physical layer via built-in LIN break detection - eliminates need for external transceiver in automotive body electronics. |
| PD8–PD15 | FSMC address/data bus | Interface to NOR/PSRAM/NAND memories up to 64 MB - enables local data buffering for offline logging without external controller. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Five low-power modes (Shutdown/Standby/Stop/Run/Low-power Run) with sub-µA entry/exit - reduces average system power by >95% during sensor idle cycles. |
| ART Accelerator™ | Zero-wait-state Flash execution at 80 MHz - eliminates instruction cache misses in deterministic control loops, improving jitter below 10 ns. |
| Dual 12-bit DACs | Low-power sample-and-hold output with 1 µs settling time - drives analog actuators directly without external op-amp buffering in closed-loop systems. |
| TSC (Touch Sensing Controller) | 24-channel capacitive sensing with hardware desaturation and noise immunity - enables robust touch UI on metal-enclosed devices without shield layers. |
| DFSDM filters | Four digital filters supporting ΣΔ modulator input (e.g., MEMS microphones) with decimation up to 1024× - replaces external DSP for audio preprocessing. |
Applications
| Portable ECG Monitor | Smart Gas Detector |
|---|---|
Use Scenario: Wearable single-lead ECG acquisition with Bluetooth LE telemetry and on-device arrhythmia detection. IC Role / Device Role / Timing Role: Main controller executing real-time QRS detection, driving 12-bit DAC for lead-off test signals, and managing dual ADC sampling at 1 kHz with 16× oversampling. Use Value: 30 nA shutdown current extends CR2032 battery life beyond 36 months; integrated op-amps condition raw electrode signals without external gain stages. |
Use Scenario: Battery-powered CO/H₂S sensor node with electrochemical cell interface, temperature compensation, and LoRaWAN reporting. IC Role / Device Role / Timing Role: Analog front-end manager acquiring picoamp-level sensor current via 12-bit ADC with programmable gain amplifier, calibrating against internal temperature sensor and VREFINT. Use Value: 420 nA Standby+RTC enables hourly wake-up for gas reading; LPUART allows immediate alarm transmission from Stop 2 mode with <4 µs latency. |
| Industrial Predictive Maintenance Node | Wireless Smart Meter |
Use Scenario: Vibration and temperature monitoring on rotating machinery using MEMS accelerometer + thermistor, with edge FFT analysis before cloud upload. IC Role / Device Role / Timing Role: Sensor hub aggregating DFSDM data from ΣΔ accelerometer, performing 128-point FFT in SRAM, and triggering CAN alerts on anomaly thresholds. Use Value: Batch Acquisition Mode (BAM) processes sensor streams autonomously while CPU remains in Stop mode - cuts active duty cycle to <0.5%. |
Use Scenario: UL-certified electricity meter with metrology-grade ADC, tamper detection, and secure firmware updates over PLC or RF. IC Role / Device Role / Timing Role: Secure metering controller running IEC 62056-compliant software, validating signatures via embedded RNG and CRC, and managing dual-bank Flash for atomic OTA updates. Use Value: Hardware parity on 32 KB SRAM and ROP/PCROP protect against bit flips and unauthorized code injection - satisfies ANSI C12.22 security requirements. |
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 or SDMMC, only 1 DAC channel, UFBGA64 package. | Lacks audio and high-speed memory interfaces; suited for simpler sensor nodes without voice feedback or local storage. | Select when BOM cost reduction is critical and peripheral count can be reduced by ≥30% without sacrificing core low-power performance. |
| STM32L552RET6 | ARMv8-M TrustZone®, 512 KB Flash, 256 KB SRAM, 110 µA/MHz run current, UFBGA100 package. | Higher security certification (PSA Level 3), but 3.6× higher active current and no integrated op-amps or TSC. | Choose for applications requiring certified secure boot and encrypted firmware storage, accepting trade-offs in analog integration and standby efficiency. |
Compared with STM32L433RCT6, the STM32L471QEI6 delivers 2× Flash, full audio/SDMMC capability, and richer analog integration at identical 30 nA shutdown current; versus STM32L552RET6, it offers superior analog subsystem and 3.6× lower active power, but lacks hardware-enforced TrustZone isolation.
Availability
STM32L471QEI6 is available at Aetrix Electronics and suitable for portable medical diagnostics, industrial predictive maintenance, and smart utility metering requiring stable component supply across multi-year production lifecycles.
Supply support for STM32L471QEI6 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 devices for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and real-time processing - optimized for wearables, environmental sensors, and energy-harvesting endpoints.
FAQ
What is the maximum operating temperature range for STM32L471QEI6?
The STM32L471QEI6 is rated for operation from –40 °C to +105 °C (industrial grade), verified per DS10741 Rev 3 Section 6.3.1. This range supports deployment in enclosed industrial enclosures and automotive cabin environments without forced cooling.
Does STM32L471QEI6 support hardware encryption acceleration?
No - the STM32L471QEI6 does not include a cryptographic accelerator (AES, PKA, or HASH). It relies on software libraries (e.g., Mbed TLS) for encryption; for hardware-accelerated crypto, consider STM32L5 or STM32U5 series devices.
Can the internal 32 kHz RC oscillator replace the LSE crystal for RTC operation?
Yes - the internal low-power 32 kHz RC (±5%) can drive the RTC in applications where ±5% time accuracy is acceptable. For calendar-grade timing (±20 ppm), the external 32.768 kHz crystal (LSE) is required, as documented in Section 3.11.2 of the datasheet.
How many I/O pins support independent 1.08 V supply in STM32L471QEI6?
Exactly 14 I/Os (grouped as GPIO ports PI0–PI13) support independent VDDIO2 supply down to 1.08 V, enabling direct interfacing with ultra-low-voltage sensors and logic without level shifters - confirmed in Section 2.3.3 of DS10741 Rev 3.
STM32L471QEI6 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L471QEI6 FAQ
1.How can I place an order for STM32L471QEI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L471QEI6 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 STM32L471QEI6 reliable?
The price and inventory of STM32L471QEI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L471QEI6 is usually 5 days.
3.What payment methods are accepted for STM32L471QEI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L471QEI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L471QEI6?
STM32L471QEI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L471QEI6 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 STM32L471QEI6?
For technical support, including STM32L471QEI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L471QEI6 requirements.
6.How does Aetrix verify that STM32L471QEI6 is sourced from the original manufacturer or authorized distributors?
All STM32L471QEI6 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 STM32L471QEI6 meets industry standards.
7.What is the process for return or replacement of STM32L471QEI6?
All STM32L471QEI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L471QEI6, 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 STM32L471QEI6 part is unused and in its original packaging.
Return procedure for STM32L471QEI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L471QEI6 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
