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STMicroelectronics STM32L552RCT6
- Part No.:
- STM32L552RCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L552RCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:126
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Product details
Overview
STM32L552RCT6 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 standby operation.
For engineers reviewing the STM32L552RCT6 datasheet, STM32L552RCT6 pinout, STM32L552RCT6 application, or STM32L552RCT6 equivalent, key selection criteria include TrustZone-enabled secure boot, 17 nA shutdown current with 5 wakeup pins, SMPS vs LDO power mode tradeoffs, and dual-bank Flash for robust firmware updates in field-deployed devices.
Technical Context
The STM32L552RCT6 implements a dual-domain Arm Cortex-M33 core with separate secure/non-secure execution environments enforced by TrustZone® and a Global TrustZone Controller (GTZC). Its ART Accelerator includes an 8-KB instruction cache enabling zero-wait-state execution from Flash at 110 MHz.
Power architecture integrates both an LDO regulator and an embedded SMPS step-down converter-enabling 62 μA/MHz run current at 3 V in SMPS mode versus 106 μA/MHz in LDO mode. Low-power modes are hierarchically structured: Shutdown (17 nA), Standby (108 nA), Stop 2 with RTC (3.16 μA), and Run (62–106 μA/MHz), all with configurable voltage scaling and fast 5 μs wakeup from Stop.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with TrustZone®, FPU, MPU, 165 DMIPS @ 110 MHz |
| Flash Memory | 512 KB dual-bank Flash with read-while-write for safe over-the-air updates |
| SRAM | 256 KB total, including 64 KB with hardware parity for safety-critical data |
| Ultra-Low-Power Modes | 17 nA Shutdown (5 wakeup pins), 108 nA Standby, 3.16 μA Stop 2 with RTC |
| Power Supply | 1.71 V to 3.6 V; supports embedded SMPS (62 μA/MHz) or LDO (106 μA/MHz) |
| Security Features | TrustZone®, RDP-based readout protection, HDP, SFI, HASH accelerator, NIST SP800-90B TRNG |
| Analog Peripherals | 2× 12-bit ADC (5 Msps, 16-bit oversampling), 2× DAC, 2× op-amps, 2× comparators |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 48 leads; RoHS-compliant, industrial temperature grade (–40 °C to 125 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Digital/analog/IO supply rails | Independent 1.71–3.6 V domains enable mixed-signal isolation and flexible power sequencing |
| VSS, VSSA, VSSIO2 | Digital/analog/IO ground returns | Separate ground paths minimize noise coupling between analog, digital, and I/O subsystems |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset sources and brownout detection |
| BOOT0 | Boot mode selection | Configures boot source (system memory, Flash, or SRAM); sampled at reset with internal pull-down |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7 | General-purpose I/Os | Up to 114 fast GPIOs; most 5 V-tolerant, up to 14 with independent 1.08–3.6 V supply for low-voltage interfaces |
| PA13/PA14/PA15 | SWD debug interface | Serial Wire Debug (SWD) pins for programming and real-time debugging without JTAG overhead |
| PF0–PF1 | Backup domain I/O | Retained in VBAT mode for RTC and 32×32-bit backup registers (187 nA VBAT current) |
Key Features
| Feature | Design Value |
|---|---|
| TrustZone®-enabled secure boot | Root of trust established via unique boot entry and hide protection area (HDP) for immutable firmware launch |
| Dual-bank Flash with RWW | Enables seamless firmware updates without halting application execution or losing real-time responsiveness |
| Embedded SMPS converter | Reduces active-mode current by 42% vs LDO (62 vs 106 μA/MHz), critical for multi-year battery life |
| ART Accelerator cache | 8-KB instruction cache eliminates Flash wait states at 110 MHz, sustaining full 165 DMIPS performance |
| ULPMark-CP® score | 370 - industry-leading energy efficiency benchmark for ultra-low-power MCU comparison |
Applications
| Smart Utility Meter | Secure Wearable Health Monitor |
|---|---|
Use Scenario: Battery-powered gas/water meter with tamper detection, encrypted data logging, and periodic cellular/NB-IoT transmission. IC Role / Device Role / Timing Role: Main application processor executing metering algorithms, managing secure OTA updates, and controlling RTC-triggered wakeups every 15 minutes. Use Value: 17 nA Shutdown mode extends 10-year battery life; TrustZone isolates metering firmware from communication stack; SMPS enables efficient burst transmission. | Use Scenario: Clinical-grade wearable measuring ECG, SpO₂, and motion, with local encryption before BLE transmission to smartphone. IC Role / Device Role / Timing Role: Secure sensor hub running real-time signal processing, cryptographic signing, and low-power sensor fusion during continuous monitoring. Use Value: 2× 12-bit ADCs sample ECG at 5 Msps with hardware oversampling; 64 KB parity-protected SRAM ensures data integrity; 108 nA Standby preserves battery during sleep intervals. |
| Industrial Wireless Sensor Node | Secure Access Control Terminal |
Use Scenario: LoRaWAN node monitoring temperature, humidity, and vibration in factory equipment with edge anomaly detection. IC Role / Device Role / Timing Role: Edge AI inference engine performing lightweight ML classification on sensor data, then entering Stop 2 mode with RTC alarm for next sampling cycle. Use Value: 5 μs wakeup from Stop enables rapid response to event triggers; FPU accelerates FFT and filtering; 256 KB SRAM hosts model weights and buffers. | Use Scenario: Tamper-resistant door controller authenticating RFID/NFC credentials, logging access events, and enforcing secure PIN entry. IC Role / Device Role / Timing Role: Root-of-trust controller verifying signed firmware, managing secure credential storage in HDP, and detecting physical tampering via active sensors. Use Value: Active tamper detection + voltage/frequency/temperature attack monitoring prevents side-channel exploits; 96-bit unique ID enables device binding; HASH accelerator speeds AES-256 operations. |
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 |
|---|---|---|---|
| STM32U575RIT6 | Higher performance (220 DMIPS), larger Flash (2 MB), dual-core Arm Cortex-M33 with DSP extensions, but no SMPS; uses LDO-only power | Better suited for complex edge AI workloads where power budget allows >100 μA/MHz; lacks sub-μA Stop 2 mode | Select when compute density outweighs battery lifetime; avoid if <5 μA average system current is required |
| RA4M3AFGB | Arm Cortex-M4F core, 100 MHz, 1 MB Flash, 384 KB SRAM, no TrustZone, Renesas Secure Crypto Engine instead of TrustZone | Strong real-time determinism and motor control peripherals; weaker hardware-enforced isolation than TrustZone | Prefer for cost-sensitive industrial drives where crypto offload suffices and dual-domain security is not mandated |
Compared with STM32U575RIT6 and RA4M3AFGB, the STM32L552RCT6 uniquely balances sub-μA low-power operation, TrustZone-based hardware root of trust, and integrated SMPS-making it optimal for long-life, certifiable, battery-powered secure endpoints where power and security co-constrain design.
Availability
STM32L552RCT6 is available at Aetrix Electronics and suitable for smart utility meters, secure wearables, industrial wireless sensor nodes, and access control terminals requiring stable component supply across extended product lifecycles.
Supply support for STM32L552RCT6 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 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 certified security (PSA Level 3), multi-year runtime, and real-time deterministic performance under strict energy budgets.
FAQ
What is the maximum operating frequency and corresponding DMIPS rating?
The STM32L552RCT6 runs at up to 110 MHz with an ART Accelerator-enabled instruction cache, achieving 165 DMIPS (1.5 DMIPS/MHz per Dhrystone 2.1). This performance is sustained without wait states due to the 8-KB cache, and verified across the full –40 °C to 125 °C temperature range with 1.71–3.6 V supply.
Does this MCU support true hardware-based secure boot and runtime isolation?
Yes. The STM32L552RCT6 implements Arm TrustZone® at the silicon level, with a Global TrustZone Controller (GTZC) that enforces secure/non-secure memory and peripheral partitioning. Secure boot begins from a unique, immutable entry point, and the Hide Protection Area (HDP) prevents unauthorized access to secure firmware images stored in Flash.
What are the key differences between SMPS and LDO power modes?
In SMPS mode, the MCU draws 62 μA/MHz at 3 V, reducing active current by ~42% versus LDO mode (106 μA/MHz). SMPS requires external inductor/capacitor components but enables longer battery life; LDO mode simplifies BOM and offers faster transient response. Both modes support dynamic voltage scaling and all low-power states including Stop 2 with RTC.
Which development tools and debug interfaces are supported?
The STM32L552RCT6 supports Serial Wire Debug (SWD) via PA13/PA14, JTAG, and Embedded Trace Macrocell™ (ETM) for real-time instruction tracing. ST's STM32CubeIDE, STM32CubeMX, and STM32CubeProgrammer fully support TrustZone configuration, secure key provisioning, and low-power mode profiling out of the box.
STM32L552RCT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- 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:
- 52
- Program Memory Size:
- 256KB (256K 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:
STM32L552RCT6 FAQ
1.How can I place an order for STM32L552RCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L552RCT6 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 STM32L552RCT6 reliable?
The price and inventory of STM32L552RCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L552RCT6 is usually 5 days.
3.What payment methods are accepted for STM32L552RCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L552RCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L552RCT6?
STM32L552RCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L552RCT6 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 STM32L552RCT6?
For technical support, including STM32L552RCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L552RCT6 requirements.
6.How does Aetrix verify that STM32L552RCT6 is sourced from the original manufacturer or authorized distributors?
All STM32L552RCT6 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 STM32L552RCT6 meets industry standards.
7.What is the process for return or replacement of STM32L552RCT6?
All STM32L552RCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L552RCT6, 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 STM32L552RCT6 part is unused and in its original packaging.
Return procedure for STM32L552RCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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