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STMicroelectronics STM32L476ZET6TR
- Part No.:
- STM32L476ZET6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 144-LQFP
- Datasheet:
-
STM32L476ZET6TR.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 144LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,925
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Product details
Overview
STM32L476ZET6TR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit microcontroller with FPU, operating up to 80 MHz (100 DMIPS), featuring 512 KB flash, 128 KB SRAM, USB OTG FS, LCD controller, and integrated SMPS support. It delivers 39 µA/MHz in SMPS-run mode, 420 nA Standby with RTC, and supports capacitive touch sensing for battery-powered portable instrumentation and medical wearables.
For engineers reviewing the STM32L476ZET6TR datasheet, STM32L476ZET6TR pinout, STM32L476ZET6TR application, or STM32L476ZET6TR equivalent, key selection criteria include ultra-low-power operation across multiple sleep modes, dual-bank flash for robust firmware updates, hardware parity on 32 KB SRAM, and native LCD driver capability for embedded HMI designs.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART Accelerator™) enabling zero-wait-state execution from flash at 80 MHz, alongside a memory protection unit (MPU) and interconnect matrix for deterministic peripheral access. Its power architecture includes three voltage scaling ranges (VOS0–VOS2), external SMPS interface, and five low-power modes (Shutdown, Stop2, Standby with/without RTC, VBAT).
Clock system comprises four independent sources: 4–48 MHz HSE, 32 kHz LSE, 16 MHz HSI (±1%), and 32 kHz LSI (±5%), plus three PLLs supporting system, USB, and audio clocks. Analog subsystem includes three 12-bit ADCs (5 Msps), two 12-bit DACs, two op-amps with PGA, and two ultra-low-power comparators - all with independent supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables real-time signal processing and floating-point math in resource-constrained edge nodes. |
| Memory | 512 KB flash (2 banks, read-while-write), 128 KB SRAM (32 KB with hardware parity) - supports secure over-the-air updates and fault-tolerant data buffering. |
| Power Consumption | 39 µA/MHz in SMPS-run mode @3.3 V - reduces battery drain in always-on sensor hubs and portable diagnostics. |
| Low-Power Modes | 420 nA Standby with RTC, 30 nA Shutdown - extends shelf life and operational runtime in energy-harvesting and coin-cell applications. |
| Analog Peripherals | 3× 12-bit ADC (5 Msps), 2× 12-bit DAC, 2× op-amps with PGA, 2× comparators - enables closed-loop analog control without external signal conditioning. |
| Interfaces | USB OTG FS, LCD 8×40, CAN 2.0B, SDMMC, Quad SPI, 5× USART, 3× I²C, 3× SPI - integrates connectivity, display, storage, and industrial bus in single-chip HMI solutions. |
| Package | LQFP144 (20 × 20 mm, 0.5 mm pitch) - provides full I/O count (114 fast I/Os, most 5 V-tolerant) with standard PCB assembly compatibility. |
Pinout & Package
LQFP144 package: 20 × 20 mm body, 0.5 mm pitch, 144 leads, ECOPACK2-compliant, with exposed thermal pad (not electrically connected). Pinout validated per DS10198 Rev 11 Section 4 (Pinouts and pin description).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power and ground | Supplies core and I/O domains; requires local decoupling per datasheet layout guidelines. |
| VDDA, VSSA | Analog power and ground | Independent supply for ADC/DAC/OPAMP; must be filtered and isolated from digital noise. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 114 total GPIOs; most 5 V-tolerant; up to 14 support independent 1.08–3.6 V I/O supply for mixed-voltage interfacing. |
| PC13–PC15 | RTC oscillator pins | Connect 32.768 kHz crystal; PC14/PC15 are dedicated LSE inputs; PC13 drives RTC backup domain. |
| PD0–PD1 | OSC_IN/OSC_OUT | 4–48 MHz external crystal interface for high-accuracy system clock generation. |
| PA11/PA12 | USB DP/DM | Full-speed USB 2.0 OTG interface; internal transceiver; requires 1.5 kΩ pull-up on PA12 for device enumeration. |
| PF0–PF15 | LCD segment/common drivers | Direct drive for 8×40 or 4×44 LCD; integrated step-up converter eliminates external bias supply. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic voltage/frequency scaling across 5 low-power modes - critical for extending battery life in wearable ECG monitors. |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz - eliminates instruction cache misses in deterministic motor control loops. |
| Dual-bank flash with ROP | Allows seamless firmware update via bank swap while maintaining application uptime - essential for certified medical firmware deployments. |
| Hardware CRC and 96-bit UID | Enables secure firmware signature verification and unique device identity for cloud-connected asset tracking. |
| Capacitive touch sensing (TSC) | 24-channel hardware-accelerated touch controller - replaces external touch ICs in handheld diagnostic tools with waterproof overlays. |
Applications
| Portable Medical Monitor | Smart Energy Meter |
|---|---|
Use Scenario: Battery-powered handheld device measuring SpO₂, pulse rate, and temperature with graphical LCD display. IC Role / Device Role / Timing Role: Central MCU managing sensor acquisition (ADC/DAC), LCD rendering, USB data export, and ultra-low-power sleep scheduling. Use Value: 420 nA Standby with RTC maintains timekeeping during multi-week idle periods; integrated LCD driver eliminates external bias IC. | Use Scenario: DIN-rail mounted meter with real-time energy calculation, tamper detection, and RF communication via external module. IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, managing CAN/RS-485 communication, and securing firmware updates via dual-bank flash. Use Value: 39 µA/MHz SMPS-run efficiency reduces self-heating in sealed enclosures; hardware CRC ensures integrity of tariff tables. |
| Industrial HMI Panel | Wireless Sensor Node |
Use Scenario: Local operator interface with 4×44 segment LCD, tactile buttons, and CAN bus integration for machine status feedback. IC Role / Device Role / Timing Role: Display controller and CAN protocol handler with real-time response to PLC commands. Use Value: Integrated LCD controller drives multiplexed segments directly; CAN 2.0B peripheral handles deterministic fieldbus messaging without software overhead. | Use Scenario: Solar-powered environmental node measuring temperature, humidity, and air quality with LoRaWAN backhaul. IC Role / Device Role / Timing Role: Ultra-low-power sensor aggregator entering Stop2 mode between 10-minute measurement cycles, waking via LPUART or RTC alarm. Use Value: 30 nA Shutdown mode preserves battery charge during seasonal dormancy; LPUART enables wake-up from deep sleep for configuration 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 |
|---|---|---|---|
| STM32L476VET6 | LQFP100 package (100 pins), 512 KB flash, same core/peripherals - lacks 14 GPIOs and 4 LCD segment lines vs. ZET6. | Suitable for space-constrained designs where full 114 I/O count and LCD resolution are not required. | Select when board area is limited and LCD or CAN+USB+SDMMC concurrency is unnecessary. |
| STM32L562ZEJ6 | Arm Cortex-M33 with TrustZone®, 512 KB flash, 256 KB SRAM, 200 nA Standby - adds cryptographic accelerators and secure boot but higher cost and larger footprint. | Required for applications needing PSA Level 1 certification, such as payment terminals or secure gateways. | Choose only when hardware-enforced security isolation and AES/SHA accelerators justify added BOM cost and design complexity. |
Compared with STM32L476VET6, the ZET6 offers expanded I/O and LCD capability in LQFP144; versus STM32L562ZEJ6, it trades security extensions for lower power and cost - making it optimal for certified-but-unsecured portable medical and industrial HMI.
Availability
STM32L476ZET6TR is available at Aetrix Electronics and suitable for portable medical monitors, smart energy meters, industrial HMI panels, and wireless sensor nodes requiring stable component supply across long-lifecycle deployments.
Supply support for STM32L476ZET6TR 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, sensors, and analog devices for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding rich peripherals, robust security features, and extended battery life - optimized for portable healthcare, smart metering, and IoT edge nodes.
FAQ
What is the maximum operating frequency and corresponding performance metric?
The STM32L476ZET6TR operates at up to 80 MHz with an Arm Cortex-M4 core and FPU, delivering 100 DMIPS (Dhrystone 2.1) and 273.55 CoreMark® (3.42 CoreMark/MHz). This performance level supports real-time FFT-based signal analysis in portable diagnostic equipment without external co-processors.
Does this MCU support hardware encryption or secure boot features?
No, the STM32L476ZET6TR does not include hardware cryptographic accelerators (AES, SHA, PKA) or secure boot ROM. It supports software-based encryption libraries and readout protection (ROP) levels, but for PSA-certified applications, ST's STM32L5 or STM32H5 series is required.
What LCD configurations are supported and how is contrast managed?
The MCU supports 8×40 or 4×44 static/dynamic LCD segments with integrated step-up converter and internal bias generation. Contrast is adjusted via software-controlled voltage steps (VLCD) and internal capacitor charge pump - eliminating need for external resistive divider or external VBOOST supply.
Can the internal SMPS be used with external inductors, and what is its regulation range?
Yes, the integrated SMPS controller supports external inductor and capacitor for efficient 1.05–1.32 V core supply (VDD12). It regulates down to 1.05 V in VOS0 mode, enabling sub-100 µA/MHz operation - verified in DS10198 Table 28 and Section 3.9.3.
STM32L476ZET6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 144-LQFP
- 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, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, PWM, WDT
- Number of I/O:
- 114
- 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 24x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L476ZET6TR FAQ
1.How can I place an order for STM32L476ZET6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L476ZET6TR 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 STM32L476ZET6TR reliable?
The price and inventory of STM32L476ZET6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L476ZET6TR is usually 5 days.
3.What payment methods are accepted for STM32L476ZET6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L476ZET6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L476ZET6TR?
STM32L476ZET6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L476ZET6TR 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 STM32L476ZET6TR?
For technical support, including STM32L476ZET6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L476ZET6TR requirements.
6.How does Aetrix verify that STM32L476ZET6TR is sourced from the original manufacturer or authorized distributors?
All STM32L476ZET6TR 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 STM32L476ZET6TR meets industry standards.
7.What is the process for return or replacement of STM32L476ZET6TR?
All STM32L476ZET6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L476ZET6TR, 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 STM32L476ZET6TR part is unused and in its original packaging.
Return procedure for STM32L476ZET6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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