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STMicroelectronics STM32U073RCT6
- Part No.:
- STM32U073RCT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32U073RCT6.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:766
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Product details
Overview
STM32U073RCT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller operating up to 56 MHz, featuring 256-Kbyte flash memory, 40-Kbyte SRAM with hardware parity, and integrated USB 2.0 full-speed crystal-less interface. It delivers 407 ULPMark™-CP and supports VBAT mode at 130 nA with RTC + 9×32-bit backup registers - deployed in battery-powered IoT sensors and portable medical monitors.
For engineers reviewing the STM32U073RCT6 datasheet, STM32U073RCT6 pinout, STM32U073RCT6 application, or STM32U073RCT6 equivalent, key selection criteria include verified 16 nA shutdown current, 825 nA Stop 2 mode with RTC, 12-bit ADC (0.4 µs conversion), LCD driver (8×48 segments), and Arm PSA Level 1 security certification readiness.
Technical Context
The STM32U073RCT6 integrates an ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, paired with a 1-Kbyte instruction cache. Its power architecture uses dual regulators (MR/LPR) and independent analog supplies (VDDA, VDDUSB, VBAT) to isolate RTC, ADC, DAC, and USB domains.
It implements a nested vectored interrupt controller (NVIC) with MPU support, 3× low-power 16-bit timers active in Stop mode, and hardware-accelerated capacitive sensing (up to 21 channels). The USB PHY operates without external crystal via internal 48 MHz HSI48 with clock recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 56 MHz max - deterministic real-time control with MPU for RTOS task isolation |
| Flash / SRAM | 256-Kbyte single-bank flash with RDP Level 2 protection; 40-Kbyte SRAM (32 KB + 8 KB) with hardware parity - enables functional safety compliance |
| Ultra-Low-Power Modes | Shutdown: 16 nA; Stop 2 with RTC: 825 nA; Standby with RTC: 160 nA - extends coin-cell battery life beyond 10 years |
| Analog Peripherals | 1×12-bit ADC (0.4 µs conv., 16-ch); 1×12-bit DAC; 2×ULP comparators; 1×OPAMP with PGA (gain up to 16) - supports sensor signal conditioning without external ICs |
| Communication | USB 2.0 FS crystal-less; 7×USART/LPUART; 4×I²C (1 Mbit/s Fast-mode Plus); 3×SPI - enables simultaneous BLE coexistence and wired diagnostics |
| Security & ID | True RNG (NIST SP 800-90B candidate); 96-bit unique ID; 5 passive anti-tamper pins; Arm PSA Level 1 & SESIP Level 3 candidate - meets IEC 62443-3-3 SL1 requirements |
| LCD Driver | 8×48 or 4×52 segment drive with internal step-up converter - eliminates external boost IC for wearable display subsystems |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 69 GPIOs (68 available in LQFP64), of which 6 are dedicated wake-up pins and up to 53 support 5 V tolerance. VDD/VDDA/VDDUSB/VBAT pins are physically separated to enforce analog/digital/USB power domain isolation per STMicroelectronics layout guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Digital core supply / ground | Supplies VCORE regulator; requires 100 nF + 4.7 µF local decoupling per ST AN5250 |
| VDDA, VSSA | Analog domain supply / ground | Independent 1.62–3.6 V supply for ADC/DAC/OPAMP; must be filtered separately from VDD |
| VDDUSB | USB transceiver supply | 3.0–3.6 V only; isolated from VDD to meet USB IF ESD immunity requirements |
| VBAT | RTC/backup register supply | Enables 130 nA RTC operation during main power loss; supports automatic VDD/VBAT switchover |
| PA11/PA12 | USB DP/DM | Crystal-less USB 2.0 FS interface; internal termination and slew-rate control eliminate external resistors |
| PC13/PC14/PC15 | LSE oscillator inputs | Supports 32.768 kHz RTC crystal; PC14/PC15 require 12.5 pF load capacitance per DS14548 §6.2.4 |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator + 1-KB cache | Enables 0-wait-state 56 MHz flash execution - eliminates external RAM for deterministic real-time firmware |
| Batch Acquisition Mode (BAM) | Reduces CPU wake-ups during sensor burst reads - cuts average current by >30% vs. polling in environmental monitors |
| Independent analog supply (VDDA) | Allows ADC/DAC/OPAMP operation at 1.62 V while digital core runs at 1.71 V - extends battery voltage utilization range |
| Capacitive sensing (21 channels) | Hardware-accelerated touchkey/rotary detection with built-in de-bounce - replaces dedicated touch controller ICs |
| USB crystal-less full-speed | HSI48 with clock recovery eliminates 12 MHz crystal and matching capacitors - reduces BOM cost and PCB area by ≥3 mm² |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
|
Use Scenario: Continuous ECG/PPG acquisition with OLED display and Bluetooth LE coexistence. IC Role / Device Role / Timing Role: Main MCU managing analog front-end, LCD driver, USB reprogramming, and secure OTA update engine. Use Value: 16 nA shutdown current and 825 nA Stop 2 mode extend CR2032 battery life to >5 years; integrated OPAMP + PGA conditions raw sensor signals without external amplifiers. |
Use Scenario: Battery-backed gas/water meter with tamper detection, pulse counting, and RF mesh reporting. IC Role / Device Role / Timing Role: System controller handling metrology ADC sampling, RTC calendar, anti-tamper monitoring, and secure data logging. Use Value: 5 passive anti-tamper pins trigger immediate erase of backup registers; VBAT-powered RTC maintains time accuracy during mains outage. |
| Industrial Wireless Sensor Node | Portable Medical Diagnostic Tool |
|
Use Scenario: LoRaWAN edge node measuring temperature, humidity, and vibration in harsh factory environments. IC Role / Device Role / Timing Role: Low-power host MCU interfacing with MEMS sensors, driving sub-GHz transceiver, and executing lightweight cryptography. Use Value: ULPMark™-CP score of 407 validates energy efficiency; 4 μs wake-up from Stop mode ensures rapid response to event-triggered sampling. |
Use Scenario: Handheld blood glucose or SpO₂ analyzer requiring FDA-grade reliability and user interface feedback. IC Role / Device Role / Timing Role: Safety-critical controller managing calibrated ADC measurements, LCD display, button input, and USB-CDC diagnostics. Use Value: Hardware parity on 40-Kbyte SRAM and ECC on flash enable IEC 62304 Class C compliance; LCD driver supports 4×52-segment display without external bias generator. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power Arm Cortex-M0+ microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L073RZT6 | Same 64-pin LQFP package but 192-Kbyte flash, no USB crystal-less, higher 340 nA Stop mode current | Lacks integrated USB PHY and LCD driver; requires external crystal for USB | Choose when USB connectivity is unnecessary and legacy L0-series toolchain compatibility is required |
| RA2E2A202JGE | Renesas 48-MHz Cortex-M23, 128-Kbyte flash, 16-Kbyte SRAM, 250 nA Stop mode, no LCD or USB FS | No crystal-less USB or segment LCD driver; different security model (Trusted Secure IP) | Prefer for designs prioritizing Arm TrustZone over ultra-low-power analog integration |
Compared with STM32L073RZT6 and RA2E2A202JGE, the STM32U073RCT6 uniquely combines crystal-less USB, 8×48 LCD drive, and 16 nA shutdown in a single 64-pin LQFP - reducing system-level BOM count by up to 4 passive components and eliminating external clock sources.
Availability
STM32U073RCT6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable medical diagnostic tools requiring stable component supply across extended product lifecycles.
Supply support for STM32U073RCT6 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 automotive semiconductors since 1987.
The STM32U0 series targets battery-constrained applications demanding sub-20 nA shutdown, certified security, and high analog integration - extending the STM32 portfolio into primary-cell and energy-harvesting systems.
FAQ
What is the maximum allowed VDDA voltage when using the internal 2.048 V reference buffer?
The internal voltage reference buffer requires VDDA ≥ 2.4 V to output ~2.048 V. If VDDA drops below this threshold, the buffer must be disabled to prevent undefined behavior. This constraint is enforced in hardware per DS14548 §3.6.1 and validated in ST's UM2732 reference design.
Does the STM32U073RCT6 support hardware AES encryption?
No - the STM32U073RCT6 does not integrate a hardware AES engine. It relies on software libraries (e.g., Mbed TLS) accelerated by its 56 MHz Cortex-M0+ core and ART Accelerator. True random number generation (TRNG) is present for key derivation, but cryptographic operations execute in firmware.
Can the 12-bit DAC operate independently of VDDA when VDD is powered?
No - the DAC requires VDDA to be within 1.80 V to 3.6 V for operation, regardless of VDD state. The DAC output stage is powered from VDDA, and attempting to use it with VDDA < 1.80 V may cause output saturation or nonlinearity, as specified in DS14548 §5.3.12.
How many GPIOs retain state in Standby mode with RTC enabled?
In Standby mode with RTC enabled, only the 8-Kbyte SRAM2 region (mapped at 0x1000_0000 and aliased at 0x2000_8000) retains data. GPIO configuration registers do not persist; all I/O states are lost unless explicitly saved to backup registers or SRAM2 before entering Standby.
STM32U073RCT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32U0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit
- Speed:
- 56MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, CapSense, DMA, LCD, LVD, PWM, Temp Sensor, TRNG, WDT
- Number of I/O:
- 53
- Program Memory Size:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 40K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b SAR; D/A 1x12b
- Oscillator Type:
- External, Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32U073RCT6 FAQ
1.How can I place an order for STM32U073RCT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32U073RCT6 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 STM32U073RCT6 reliable?
The price and inventory of STM32U073RCT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U073RCT6 is usually 5 days.
3.What payment methods are accepted for STM32U073RCT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U073RCT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32U073RCT6?
STM32U073RCT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32U073RCT6 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 STM32U073RCT6?
For technical support, including STM32U073RCT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U073RCT6 requirements.
6.How does Aetrix verify that STM32U073RCT6 is sourced from the original manufacturer or authorized distributors?
All STM32U073RCT6 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 STM32U073RCT6 meets industry standards.
7.What is the process for return or replacement of STM32U073RCT6?
All STM32U073RCT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32U073RCT6, 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 STM32U073RCT6 part is unused and in its original packaging.
Return procedure for STM32U073RCT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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