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STMicroelectronics STM32L552CEU6
- Part No.:
- STM32L552CEU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32L552CEU6.pdf
- Description:
- IC MCU 32BIT 512KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,099
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Product details
Overview
STM32L552CEU6 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 edge nodes such as industrial wireless sensors and medical wearables.
For engineers reviewing the STM32L552CEU6 datasheet, STM32L552CEU6 pinout, STM32L552CEU6 application, or STM32L552CEU6 equivalent, key selection criteria include TrustZone-enabled secure boot, sub-100 nA standby current with RTC, SMPS efficiency (62 μA/MHz @ 3 V), and dual 12-bit ADCs with 5 Msps sampling - all in a compact UFQFPN48 (7 × 7 mm) package.
Technical Context
The STM32L552CEU6 implements a dual-bank Flash architecture enabling seamless firmware updates without halting execution, paired with an 8-KB ART Accelerator instruction cache for zero-wait-state operation at 110 MHz. Its TrustZone® partitioning enforces hardware-isolated secure/non-secure worlds, with Root of Trust established via unique boot entry and Hide Protection Area (HDP).
Power management combines an integrated LDO and configurable SMPS step-down converter, supporting dynamic voltage scaling and multiple low-power modes - including Stop 2 (3.16 μA with RTC) and Shutdown (17 nA with 5 wakeup pins). Clocking includes four PLLs (system, USB, audio, ADC), internal auto-trimmed oscillators (±0.25%), and crystal-less USB FS capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with TrustZone and FPU, enabling secure real-time processing and DSP instructions |
| Max Clock Frequency | 110 MHz - supports 165 DMIPS performance with ART Accelerator cache |
| Flash Memory | 512 KB dual-bank Flash - enables live firmware updates and secure code isolation |
| SRAM | 256 KB total, including 64 KB with hardware parity - ensures data integrity in safety-critical tasks |
| Supply Voltage Range | 1.71 V to 3.6 V - compatible with single-cell Li-ion, coin cell, and industrial power rails |
| Low-Power Modes | Shutdown (17 nA), Standby w/RTC (222 nA), Stop 2 w/RTC (3.16 μA) - extends battery life in intermittent sensing |
| Analog Peripherals | 2×12-bit ADC (5 Msps), 2×12-bit DAC, 2×op-amps with PGA, 2×ultra-low-power comparators - supports sensor signal conditioning without external ICs |
Pinout & Package
STM32L552CEU6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), optimized for space-constrained PCB layouts while maintaining thermal performance and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main digital supply | 1.71–3.6 V input powering core, peripherals, and I/Os; requires local decoupling |
| VSS | Digital ground | Reference return path for digital circuitry; must be connected to low-impedance ground plane |
| VDDA | Analog supply | Independent 1.71–3.6 V rail for ADC/DAC/OPAMP; improves analog noise immunity |
| VSSA | Analog ground | Separate analog return path; isolated from digital ground to reduce coupling noise |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PH0–PH1 | General-purpose I/Os | Up to 114 fast GPIOs with interrupt capability; most are 5 V-tolerant and support multiple alternate functions |
| NRST | Reset input | Active-low reset pin; accepts external pull-up and debounced push-button inputs |
| BOOT0 | Boot mode selection | Configures boot source (system memory, Flash, or SRAM); sampled at reset |
| SWDIO / SWCLK | Debug interface | Serial Wire Debug pins for programming and real-time trace; minimal 2-pin debug footprint |
Key Features
| Feature | Design Value |
|---|---|
| TrustZone® Security | Hardware-enforced isolation between secure and non-secure firmware, with securable memories/peripherals and RDP-based life-cycle control |
| FlexPowerControl | Multi-level low-power modes (Shutdown, Standby, Stop) with sub-μA retention and 5 μs wake-up - ideal for duty-cycled IoT endpoints |
| OCTOSPI Interface | High-speed octal SPI supporting XIP from external flash or PSRAM - eliminates need for large on-chip memory in firmware-intensive apps |
| SMPS Integration | On-chip step-down converter delivering 62 μA/MHz efficiency at 3 V - reduces external BOM and improves battery runtime vs. LDO-only operation |
| Secure Firmware Upgrade | Native TF-M support and embedded RSS for authenticated, encrypted over-the-air updates - meets PSA Level 3 requirements |
Applications
| Industrial Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity/pressure node transmitting via LoRaWAN or BLE. IC Role / Device Role / Timing Role: Main controller executing sensor fusion, secure OTA updates, and low-duty-cycle radio scheduling. Use Value: 17 nA Shutdown current and 5 μs wake-up minimize energy per measurement cycle; TrustZone isolates sensor data handling from network stack. | Use Scenario: Wearable ECG or SpO₂ monitor with continuous analog acquisition and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Real-time signal processor managing dual 12-bit ADCs (5 Msps), op-amp front-end, and secure health data transmission. Use Value: 2× hardware-parity SRAM ensures data reliability; 222 nA Standby-with-RTC maintains timekeeping during sleep between measurements. |
| Smart Utility Meter | Secure Asset Tracker |
Use Scenario: M-Bus or NB-IoT enabled electricity/water meter with tamper detection and firmware signing. IC Role / Device Role / Timing Role: Secure metering SoC handling metrology calculations, cryptographic signing, and anti-tamper event logging. Use Value: Active tamper detection (voltage/frequency/temp) + 96-bit UID + HDP prevents cloning; 512 KB dual-bank Flash enables A/B firmware updates. | Use Scenario: GPS/GNSS tracker in logistics containers with geofence alerts and encrypted location reporting. IC Role / Device Role / Timing Role: Low-power host managing GNSS receiver, cellular modem control, and secure location encryption. Use Value: SMPS efficiency (62 μA/MHz) extends battery life under intermittent GNSS acquisition; UCPD peripheral supports USB-C power negotiation and firmware loading. |
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 clock (160 MHz), larger Flash (2 MB), enhanced crypto accelerators (AES-256, PKA), but no SMPS; uses different package (LQFP144) | Better suited for complex secure gateways or HMI controllers requiring higher throughput and advanced cryptography | Select when >110 MHz performance, larger memory, or PKA acceleration is required - not drop-in due to pinout and power architecture differences |
| RA4M3G10CBM#AC0 | Arm Cortex-M4F core, 100 MHz, 1 MB Flash, 384 KB SRAM, no TrustZone, lower ultra-low-power spec (250 nA Standby) | Targets cost-sensitive industrial HMI or motor control where security is software-managed and power budget allows higher leakage | Choose for Renesas ecosystem alignment or when hardware TrustZone is not mandated - lacks HDP, SFI, and active tamper features |
Compared with STM32U575ZIT6 and RA4M3G10CBM#AC0, the STM32L552CEU6 uniquely balances sub-100 nA shutdown current, integrated SMPS, and production-ready TrustZone security in a compact 48-pin QFN - making it optimal for constrained, battery-operated secure edge devices where power, size, and certified security are co-prioritized.
Availability
STM32L552CEU6 is available at Aetrix Electronics and suitable for industrial wireless sensors, portable medical monitors, smart utility meters, and secure asset trackers requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L552CEU6 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, sensors, and analog components for industrial, automotive, and consumer markets.
The STM32L5 series is ST's flagship ultra-low-power secure MCU line, engineered specifically for battery-operated IoT endpoints demanding PSA Certified Level 3 security, sub-μA power states, and robust analog integration - all within compact packages.
FAQ
What is the maximum operating temperature for STM32L552CEU6?
The STM32L552CEU6 is qualified for operation from –40 °C to +125 °C ambient temperature, meeting extended industrial requirements. This rating applies to all package variants including the UFQFPN48, and is validated per JEDEC JESD47 stress testing standards.
Does STM32L552CEU6 support crystal-less USB Full-Speed operation?
Yes, STM32L552CEU6 integrates a factory-trimmed 48 MHz internal oscillator with clock recovery system (CRS), enabling certified crystal-less USB 2.0 Full-Speed operation without external timing components - reducing BOM cost and board area.
How does the SMPS in STM32L552CEU6 differ from the LDO regulator?
The integrated SMPS step-down converter achieves 62 μA/MHz efficiency at 3 V, significantly lower than the LDO's 106 μA/MHz. It requires external inductor/capacitor but enables longer battery life in high-duty-cycle applications; the LDO remains available for noise-sensitive analog use cases.
Can STM32L552CEU6 execute code directly from external OCTOSPI memory?
Yes, the OCTOSPI interface supports Execute-in-Place (XIP) mode from external flash or PSRAM. Combined with the ART Accelerator cache, this allows zero-wait-state execution at full 110 MHz - eliminating Flash bottlenecks in memory-intensive firmware deployments.
STM32L552CEU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32L5
- Packaging:
- Tray
- 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:
- 38
- 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 9x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L552CEU6 FAQ
1.How can I place an order for STM32L552CEU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L552CEU6 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 STM32L552CEU6 reliable?
The price and inventory of STM32L552CEU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L552CEU6 is usually 5 days.
3.What payment methods are accepted for STM32L552CEU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L552CEU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L552CEU6?
STM32L552CEU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L552CEU6 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 STM32L552CEU6?
For technical support, including STM32L552CEU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L552CEU6 requirements.
6.How does Aetrix verify that STM32L552CEU6 is sourced from the original manufacturer or authorized distributors?
All STM32L552CEU6 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 STM32L552CEU6 meets industry standards.
7.What is the process for return or replacement of STM32L552CEU6?
All STM32L552CEU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L552CEU6, 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 STM32L552CEU6 part is unused and in its original packaging.
Return procedure for STM32L552CEU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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