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STMicroelectronics STM32L552CCT6
- Part No.:
- STM32L552CCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L552CCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,525
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Product details
Overview
STM32L552CCT6 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 applications such as industrial wireless sensors and medical wearables requiring certified firmware updates and tamper-resistant operation.
For engineers reviewing the STM32L552CCT6 datasheet, STM32L552CCT6 pinout, STM32L552CCT6 application, or STM32L552CCT6 equivalent, key selection criteria include TrustZone-enabled peripheral isolation, sub-100 nA standby current with RTC, dual 12-bit ADCs (5 Msps), integrated SMPS controller, and UCPD-based USB Type-C™ power delivery capability.
Technical Context
The STM32L552CCT6 implements a dual-core security architecture: the Cortex-M33 core executes in both Secure and Non-secure states, enforced by SAU and GTZC peripherals. Its FlexPowerControl system enables dynamic voltage scaling and mode transitions - including Shutdown (17 nA), Standby with RTC (222 nA), and Stop 2 (3.16 μA) - managed via dedicated PWR registers and hardware wakeup logic.
It integrates three PLLs (system, USB/audio, ADC), ART Accelerator with 8 KB instruction cache for zero-wait-state Flash execution, and advanced analog subsystems: two 12-bit ADCs with hardware oversampling (up to 16-bit), two DACs, two op-amps with PGA, and two ultra-low-power comparators - all supported by independent analog supply domains.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M33 with TrustZone, FPU, MPU, 110 MHz max frequency, 165 DMIPS |
| Memory | 512 KB dual-bank Flash (read-while-write), 256 KB SRAM (64 KB with parity) |
| Ultra-Low-Power Modes | 17 nA Shutdown, 222 nA Standby with RTC, 3.16 μA Stop 2 with RTC, 5 μs wakeup |
| Analog Peripherals | 2× 12-bit ADC (5 Msps, 200 µA/Msps), 2× 12-bit DAC, 2× op-amps with PGA, 2× comparators |
| Security Features | TrustZone® isolation, RDP, HDP, SFI with embedded RSS, HASH accelerator, NIST SP800-90B TRNG |
| Communication Interfaces | 1× UCPD, 1× USB FS (crystal-less), 4× I²C FM+, 6× USART, 3× SPI, 2× SAI, 1× FDCAN, 1× SDMMC |
| Package & Pin Count | LQFP48 (7 × 7 mm), 48-pin, 36 general-purpose I/Os (5 V-tolerant) |
Pinout & Package
LQFP48 package: 7 × 7 mm body, 0.5 mm pitch, exposed thermal pad, RoHS-compliant, rated for –40 °C to 125 °C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Digital/analog/IO supply rails | Independent 1.71–3.6 V supplies enable mixed-signal integrity and low-noise ADC/DAC operation |
| VSS, VSSA, VSSIO2 | Digital/analog/IO ground returns | Separate ground paths minimize coupling noise between digital switching and precision analog circuits |
| PA0–PA15, PB0–PB15, PC0–PC15, PD2 | General-purpose I/Os | 36 total GPIOs; most 5 V-tolerant, support multiple alternate functions including UCPD, FDCAN, OCTOSPI |
| 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, SRAM); sampled at reset, requires external pull-up/down |
| VBAT | RTC and backup register supply | Enables RTC calendar and 32×32-bit backup registers during main power loss (187 nA consumption) |
| UCPD1_CC1/CC2 | USB Type-C™ configuration channel | Hardware-controlled CC line drivers/receivers for USB PD negotiation without host CPU intervention |
Key Features
| Feature | Design Value |
|---|---|
| TrustZone®-enabled peripheral isolation | GTZC and TZSC enforce secure/non-secure access to memories, I/Os, and peripherals at hardware level |
| SMPS step-down converter | Integrated DC-DC regulator reduces active-mode current to 62 μA/MHz @ 3 V vs. 106 μA/MHz with LDO |
| ART Accelerator + 8 KB I-Cache | Enables zero-wait-state execution from Flash at 110 MHz, eliminating timing penalties of embedded Flash |
| Secure Firmware Installation (SFI) | Root Secure Services (RSS) validate and authenticate firmware images before loading into secure memory |
| ULPMark-CP® score | 370 - industry benchmark confirming verified ultra-low-power performance across standardized workloads |
Applications
| Industrial Wireless Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Battery-powered temperature/humidity node transmitting encrypted sensor data via LoRaWAN every 5 minutes. IC Role / Device Role / Timing Role: Primary MCU managing sensor acquisition, TrustZone-secured AES encryption, low-power radio interface, and precise RTC-triggered wakeups. Use Value: 17 nA Shutdown and 222 nA Standby with RTC extend 2000 mAh coin-cell life beyond 10 years; SMPS cuts active current by 42% vs. LDO mode. | Use Scenario: Wearable ECG patch continuously sampling biopotentials and logging data to local FRAM while supporting Bluetooth LE pairing. IC Role / Device Role / Timing Role: Signal-processing MCU with dual 12-bit ADCs (5 Msps), hardware oversampling, and real-time DSP acceleration via FPU. Use Value: 200 µA/Msps ADC efficiency and 64 KB parity-protected SRAM ensure reliable signal integrity and crash-proof data buffering during motion artifacts. |
| Smart Energy Metering Endpoint | Secure IoT Gateway Controller |
Use Scenario: DIN-rail mounted meter collecting voltage/current harmonics and reporting via NB-IoT with firmware update capability. IC Role / Device Role / Timing Role: Trusted execution environment for metrology calculations, secure OTA updates via TF-M, and tamper detection using active sensors. Use Value: Active tamper protection (voltage/frequency/temperature monitoring) and 96-bit unique ID prevent physical cloning and unauthorized firmware modification. | Use Scenario: Edge gateway aggregating BLE/Zigbee sensor data, performing local policy enforcement, and forwarding to cloud via TLS-secured MQTT. IC Role / Device Role / Timing Role: Root-of-trust anchor running TF-M, managing secure boot, TLS offload via HASH accelerator, and isolated network stack in Non-secure world. Use Value: 27400 SecureMark-TLS® score validates hardware-accelerated cryptographic throughput sufficient for concurrent TLS 1.3 handshakes on 3+ interfaces. |
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), 2 MB Flash, 784 KB SRAM, same TrustZone/SMPS/UCPD architecture but larger LQFP144 package | Targets complex edge AI inference and multi-protocol gateways where memory headroom and compute density outweigh size constraints | Select when >512 KB Flash or >256 KB SRAM is required; not pin-compatible with LQFP48 |
| RA4M3G10FJBE | Arm Cortex-M33 (100 MHz), 1 MB Flash, 384 KB SRAM, no SMPS, no UCPD, Renesas Secure Crypto Engine instead of TrustZone | Suitable for cost-sensitive industrial HMI where USB-C PD is unnecessary and external DC-DC is acceptable | Select for lower BOM cost where integrated SMPS and UCPD are non-critical; requires different security integration effort |
Compared with STM32U575ZIT6, the STM32L552CCT6 offers identical security architecture in a compact LQFP48 footprint ideal for space-constrained designs, while the RA4M3G10FJBE trades integrated power management and USB-C control for broader memory and simpler supply design - making each optimal for distinct trade-offs in size, power autonomy, and interface complexity.
Availability
STM32L552CCT6 is available at Aetrix Electronics and suitable for industrial wireless sensors, portable medical monitors, smart energy meters, and secure IoT gateways requiring stable component supply across extended product lifecycles.
Supply support for STM32L552CCT6 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 silicon-level power optimization to serve battery-operated, safety-critical, and regulatory-compliant devices in healthcare, industrial, and smart infrastructure markets.
FAQ
What is the maximum operating frequency and associated performance metric?
The STM32L552CCT6 runs at up to 110 MHz with the Arm Cortex-M33 core, achieving 165 DMIPS (Dhrystone 2.1) and 442 CoreMark® (4.02 CoreMark®/MHz). This performance is sustained with zero-wait-state execution enabled by the 8 KB ART Accelerator instruction cache, even when fetching from internal Flash memory.
How does the integrated SMPS improve power efficiency compared to LDO mode?
In SMPS step-down converter mode, the STM32L552CCT6 consumes 62 μA/MHz at 3 V, versus 106 μA/MHz in LDO mode - a 42% reduction in active-mode current. This translates directly to longer battery life in continuous-operation applications, especially when paired with its 5 μs wakeup from Stop mode and sub-100 nA low-power states.
Which security features are hardware-enforced and require no software overhead?
Hardware-enforced security includes TrustZone® memory/peripheral isolation via SAU and GTZC, Readout Protection (RDP) levels, Hide Protection Area (HDP), active tamper detection (voltage/frequency/temperature), and NIST SP800-90B–compliant True Random Number Generation. These operate independently of firmware and cannot be bypassed by software-only attacks.
Can the STM32L552CCT6 support USB Type-C™ Power Delivery without external controllers?
Yes - the integrated UCPD (USB Type-C™ and Power Delivery) controller handles physical layer signaling, CC line monitoring, and PD message parsing in hardware. It supports sink/source roles, vendor-defined messages, and fast role swap, enabling full USB-C PD negotiation without external PHY or protocol stack intervention.
STM32L552CCT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 38
- 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 9x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L552CCT6 FAQ
1.How can I place an order for STM32L552CCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L552CCT6 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 STM32L552CCT6 reliable?
The price and inventory of STM32L552CCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L552CCT6 is usually 5 days.
3.What payment methods are accepted for STM32L552CCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L552CCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L552CCT6?
STM32L552CCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L552CCT6 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 STM32L552CCT6?
For technical support, including STM32L552CCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L552CCT6 requirements.
6.How does Aetrix verify that STM32L552CCT6 is sourced from the original manufacturer or authorized distributors?
All STM32L552CCT6 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 STM32L552CCT6 meets industry standards.
7.What is the process for return or replacement of STM32L552CCT6?
All STM32L552CCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L552CCT6, 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 STM32L552CCT6 part is unused and in its original packaging.
Return procedure for STM32L552CCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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