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STMicroelectronics STM32L552MEY6PTR
- Part No.:
- STM32L552MEY6PTR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 81-UFBGA, WLCSP
- Datasheet:
-
STM32L552MEY6PTR.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 81WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,541
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Product details
Overview
STM32L552MEY6PTR from STMicroelectronics is an ultra-low-power Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, FPU, and SMPS support. It delivers 165 DMIPS at up to 110 MHz, integrates 512 KB Flash (dual-bank read-while-write), 256 KB SRAM (64 KB with hardware parity), and operates from 1.71 V to 3.6 V across –40 °C to 125 °C. It targets secure, battery-constrained IoT edge nodes requiring real-time processing, cryptographic services, and sub-μA low-power operation.
For engineers reviewing the STM32L552MEY6PTR datasheet, STM32L552MEY6PTR pinout, STM32L552MEY6PTR application, or STM32L552MEY6PTR equivalent, key selection criteria include TrustZone-enabled secure boot, 17 nA shutdown current, dual-bank Flash for seamless firmware updates, SMPS efficiency (62 μA/MHz @ 3 V), and integrated analog peripherals including two 12-bit ADCs (5 Msps) and two DACs.
Technical Context
The STM32L552MEY6PTR implements a dual-domain Arm Cortex-M33 core with separate Secure and Non-secure states enforced by TrustZone®, MPU, and GTZC peripheral gating. Its ART Accelerator includes an 8-KB instruction cache enabling zero-wait-state execution from Flash at 110 MHz.
Power architecture combines an embedded LDO and configurable SMPS step-down converter, supporting dynamic voltage scaling and multiple low-power modes - including 17 nA Shutdown, 108 nA Standby, and 3.16 μA Stop 2 with RTC - all with deterministic 5 μs wakeup latency.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with TrustZone®, FPU, and MPU - enables hardware-isolated secure firmware execution and real-time signal processing. |
| Max Clock Frequency | 110 MHz - supports high-throughput sensor fusion and crypto acceleration without external clock sources. |
| Flash Memory | 512 KB, dual-bank, read-while-write - allows over-the-air (OTA) firmware updates with zero downtime and atomic rollback. |
| SRAM | 256 KB total, including 64 KB with hardware parity - ensures data integrity in safety-critical logging and control buffers. |
| Ultra-Low-Power Modes | 17 nA Shutdown (5 wakeup pins), 108 nA Standby, 3.16 μA Stop 2 with RTC - extends coin-cell battery life to >10 years in metering and asset tracking. |
| Security Features | TrustZone®, RDP, HDP, SFI with TF-M, HASH accelerator, NIST SP800-90B TRNG - meets PSA Level 3 and SESIP certification prerequisites. |
| Analog Peripherals | 2× 12-bit ADC (5 Msps, 16-bit oversampling), 2× DAC, 2× OPAMP, 2× comparator - enables local sensor signal conditioning without external components. |
Pinout & Package
STM32L552MEY6PTR is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for compact industrial and portable designs. Pin functions are validated per STMicroelectronics' DS12737 Rev 6, Section 4 ("Pinouts and pin description").
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.71–3.6 V operation; decoupling required per layout guidelines for SMPS/LDO stability. |
| VDDA, VSSA | Analog power and ground | Independent analog domain supply - isolates noise-sensitive ADC/DAC/OPAMP operation from digital switching. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | Up to 114 fast I/Os; most 5 V-tolerant, 14 with independent VDDIO2 down to 1.08 V - enables mixed-voltage interface with sensors and legacy peripherals. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset supervisor or pushbutton recovery. |
| BOOT0 | Boot mode selection | Configures boot source (system memory, Flash, or SRAM); critical for secure boot initialization and DFU recovery. |
| SWCLK/SWDIO | Serial Wire Debug interface | 2-pin debug port supporting SWD and JTAG - enables secure firmware development and field diagnostics without exposing full debug access. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables granular power gating per peripheral domain, reducing active-mode current to 62 μA/MHz using SMPS and optimizing energy per task. |
| ART Accelerator + 8-KB I-Cache | Eliminates Flash wait states at 110 MHz, delivering consistent 165 DMIPS performance while lowering code-fetch energy. |
| Dual-bank Flash with RWW | Allows background firmware update verification in one bank while executing from the other - essential for fail-safe OTA deployment. |
| Integrated SMPS step-down converter | Replaces external DC-DC, achieving 62 μA/MHz run efficiency at 3 V and eliminating BOM cost and PCB area for power conversion. |
| TrustZone + TF-M support | Provides certified secure boot, isolated secure storage, and PSA-compliant crypto services out-of-box - accelerates compliance for medical and industrial certifications. |
Applications
| Smart Utility Metering | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-powered gas/water/electricity meters transmitting encrypted consumption data hourly via LPWAN. IC Role / Device Role / Timing Role: Primary MCU handling sensor acquisition (pulse counting, pressure, temperature), AES-128 encryption, secure OTA updates, and RTC-based time-stamped logging. Use Value: 17 nA shutdown current extends 10-year battery life; dual-bank Flash enables verified firmware swaps without service interruption. | Use Scenario: Clinical-grade wearable measuring ECG, SpO₂, and motion via integrated analog front-end. IC Role / Device Role / Timing Role: Real-time signal processor running sensor fusion algorithms, managing low-latency ADC sampling, and securing biometric data in TrustZone-protected memory. Use Value: Two 12-bit ADCs (5 Msps) capture high-fidelity biosignals; 2× OPAMPs enable on-chip instrumentation amplification, reducing external component count. |
| Industrial Wireless Sensor Node | Secure Access Control Terminal |
Use Scenario: Dust-proof, wide-temperature (-40 °C to 125 °C) node monitoring vibration, humidity, and ambient temperature in factory settings. IC Role / Device Role / Timing Role: Edge AI inference host (TinyML), FDCAN bus interface for local control, and secure key provisioning via TRNG/HASH. Use Value: 125 °C extended temperature rating ensures reliability in motor enclosures; SMPS efficiency maintains runtime during burst transmission cycles. | Use Scenario: Tamper-resistant door controller authenticating RFID/NFC credentials and enforcing multi-factor access policies. IC Role / Device Role / Timing Role: Root of trust MCU performing secure boot, credential validation, tamper detection (active + voltage/frequency monitoring), and encrypted audit log storage. Use Value: Active tamper sensing and HDP-protected boot entry prevent physical cloning; 96-bit unique ID enables device-specific key binding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power secure MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32U575ZIT6 | Higher performance (160 MHz Cortex-M33), larger Flash (2 MB), enhanced crypto (AES-GCM, SHA-256), but no SMPS; uses LDO-only power scheme. | Better suited for complex UI or cloud-connected gateways; less optimal for coin-cell or energy-harvesting nodes where SMPS efficiency is critical. | Select when prioritizing compute headroom and advanced crypto over sub-μA shutdown current and integrated SMPS. |
| RA4M3AFGB | Renesas RA4M3 with Cortex-M33, TrustZone, 1 MB Flash, 384 KB SRAM; lacks integrated SMPS and has higher 1.2 μA Stop mode current. | Stronger USB FS and CAN FD integration; better for mixed-signal industrial HMI; weaker ultra-low-power envelope than STM32L552. | Choose if USB-C device mode or CAN FD networking dominates system requirements and 1.2 μA Stop mode suffices. |
Compared with STM32U575ZIT6 and RA4M3AFGB, the STM32L552MEY6PTR uniquely balances sub-20 nA shutdown, integrated SMPS, dual-bank Flash, and PSA-certifiable TrustZone - making it the only option meeting strict 10-year battery life and secure OTA requirements in constrained edge nodes.
Availability
STM32L552MEY6PTR is available at Aetrix Electronics and suitable for smart utility metering, wearable health monitors, industrial wireless sensor nodes, and secure access control terminals requiring stable component supply across long product lifecycles.
Supply support for STM32L552MEY6PTR 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 ICs, sensors, and automotive semiconductors since 1987.
The STM32L5 series is engineered for ultra-low-power, high-security embedded applications - combining Arm TrustZone with energy-efficient architectures to serve IoT, industrial, and medical edge devices demanding both longevity and robust protection.
FAQ
What is the maximum operating temperature range for STM32L552MEY6PTR?
The STM32L552MEY6PTR is qualified for operation from –40 °C to +125 °C ambient temperature, as specified in DS12737 Rev 6 Section 5.3.1. This extended range supports deployment in harsh environments such as motor control enclosures, outdoor utility infrastructure, and automotive under-hood applications.
Does STM32L552MEY6PTR support hardware-accelerated cryptography?
Yes - it integrates a HASH hardware accelerator supporting SHA-1, SHA-224, and SHA-256, plus a NIST SP800-90B compliant True Random Number Generator (TRNG). These, combined with TrustZone-enforced key isolation and TF-M, enable certified TLS 1.2/1.3 stack execution and secure firmware signing.
How many low-power timer instances are available, and what modes do they operate in?
The device includes three independent low-power timers (LPTIM1, LPTIM2, LPTIM3), each functional in Stop, Standby, and Shutdown modes. They support encoder interfaces, pulse-width measurement, and ultra-low-jitter periodic wakeups - critical for maintaining timing integrity during extended sleep periods without CPU intervention.
Is external SMPS support available, and how is it configured?
Yes - the STM32L552MEY6PTR supports external SMPS via the VDDSMPS pin and dedicated control signals (SMPS_EN, SMPS_VREF, SMPS_FB). Configuration is managed through the PWR_CR3 register and requires external feedback compensation per ST's AN5210 application note for stable regulation across load transients.
STM32L552MEY6PTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 81-UFBGA, WLCSP
- Series:
- STM32L5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M33
- Core Size:
- 32-Bit Single-Core
- Speed:
- 110MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 54
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 256K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L552MEY6PTR FAQ
1.How can I place an order for STM32L552MEY6PTR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L552MEY6PTR 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 STM32L552MEY6PTR reliable?
The price and inventory of STM32L552MEY6PTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L552MEY6PTR is usually 5 days.
3.What payment methods are accepted for STM32L552MEY6PTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L552MEY6PTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L552MEY6PTR?
STM32L552MEY6PTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L552MEY6PTR 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 STM32L552MEY6PTR?
For technical support, including STM32L552MEY6PTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L552MEY6PTR requirements.
6.How does Aetrix verify that STM32L552MEY6PTR is sourced from the original manufacturer or authorized distributors?
All STM32L552MEY6PTR 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 STM32L552MEY6PTR meets industry standards.
7.What is the process for return or replacement of STM32L552MEY6PTR?
All STM32L552MEY6PTR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L552MEY6PTR, 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 STM32L552MEY6PTR part is unused and in its original packaging.
Return procedure for STM32L552MEY6PTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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