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STMicroelectronics STM32U073K8U6
- Part No.:
- STM32U073K8U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- -
- Datasheet:
-
STM32U073K8U6.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 32UFQFPN
- Quantity:
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Inventory:1,073
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Product details
Overview
STM32U073K8U6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M0+ 32-bit MCU 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 and 9 backup registers - optimized for battery-powered IoT sensors and portable medical devices.
For engineers reviewing the STM32U073K8U6 datasheet, STM32U073K8U6 pinout, STM32U073K8U6 application, or STM32U073K8U6 equivalent, key selection criteria include shutdown current (16 nA), Stop 2 mode consumption (695 nA without RTC), 12-bit ADC conversion time (0.4 µs), LCD segment drive capability (8×48), and 5 V-tolerant GPIO count (up to 69).
Technical Context
The STM32U073K8U6 integrates an ART Accelerator enabling 0-wait-state execution from flash at 56 MHz, paired with a 1-Kbyte instruction cache. Its power architecture includes dual regulators (MR/LPR) and dedicated analog supplies (VDDA, VDDUSB, VBAT) supporting independent domain operation.
It features a 12-bit ADC with hardware oversampling up to 16-bit resolution, a 12-bit DAC with low-power sample-and-hold, two ultra-low-power comparators, one operational amplifier with programmable gain (up to 16×), and 21 capacitive sensing channels - all powered from isolated analog rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M0+, 56 MHz max - deterministic real-time control with MPU support |
| Flash / SRAM | 256-Kbyte single-bank flash with readout protection; 40-Kbyte SRAM (32 KB + 8 KB) with hardware parity - functional safety compliance ready |
| Ultra-Low-Power Modes | Shutdown: 16 nA; Standby (no RTC): 30 nA; Stop 2 (no RTC): 695 nA - enables multi-year battery life in sensor nodes |
| Analog Peripherals | 1× 12-bit ADC (0.4 µs conv.), 1× 12-bit DAC, 2× comparators, 1× OPAMP with PGA - enables precision signal conditioning without external components |
| Communication | USB 2.0 FS crystal-less, 7× USART/LPUART, 4× I²C (up to 1 Mbit/s), 3× SPI - supports mixed-speed peripheral connectivity in space-constrained designs |
| Package & I/O | UFQFPN48 (7 × 7 mm); 48 pins; up to 39 GPIOs with 5 V tolerance - compact footprint for wearable and portable equipment |
| Security | RDP Level 2 (irreversible), HDP, secure boot, TRNG (NIST SP 800-90B candidate), PSA Level 1/SESIP Level 3 candidate - meets baseline embedded security requirements |
Pinout & Package
STM32U073K8U6 is housed in a 48-pin UFQFPN package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant and ECOPACK2 certified. Pin assignments are validated per DS14548 Rev 2 (pages 42–45) and match the STM32U073Kx pin mapping for LQFP48/UFQFPN48 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Digital power supply and ground | 1.71–3.6 V core/I/O rail; decoupling required per datasheet layout guidelines |
| VDDA, VSSA | Analog power and ground | Independent 1.62–3.6 V supply for ADC/DAC/OPAMP - prevents digital noise coupling |
| VBAT | Backup power input | Supplies RTC and 9×32-bit backup registers during main power loss; supports supercapacitor/battery backup |
| PA9/PA10 | USB DM/DP | Crystal-less USB 2.0 full-speed interface - eliminates external oscillator, reduces BOM cost and board area |
| PC13/PC14/PC15 | LSE oscillator inputs | 32.768 kHz crystal connection for RTC calendar accuracy - essential for time-stamped sensor logging |
| PA0 | ADC1_IN0 / TAMP1 | Primary analog input channel and tamper detection pin - enables simultaneous sensing and anti-tamper monitoring |
Key Features
| Feature | Design Value |
|---|---|
| ART Accelerator with 1-KB cache | Enables 0-wait-state execution at 56 MHz from flash - eliminates external RAM for most firmware deployments |
| VBAT domain with RTC + 9×32-bit registers | 130 nA retention current - preserves real-time clock and critical state across power cycles in energy-harvesting systems |
| Capacitive touch sensing (21 channels) | Supports touchkey, linear, and rotary sensors without external IC - reduces component count in HMI designs |
| Integrated LCD controller (8×48 segments) | Drives segment-based displays with internal step-up converter - eliminates external boost IC for portable display interfaces |
| USB crystal-less full-speed PHY | Eliminates 48 MHz crystal and associated load capacitors - saves ~$0.15 BOM cost and 2 mm² PCB area |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/temperature logging with Bluetooth LE offload and multi-year battery life. IC Role / Device Role / Timing Role: Primary system controller managing analog front-end sampling, RTC timestamping, USB firmware updates, and low-power state orchestration. Use Value: 695 nA Stop 2 mode and 4 μs wake-up enable sub-second sensor polling while maintaining >5-year CR2032 battery life. | Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, and secure firmware updates. IC Role / Device Role / Timing Role: Secure metering SoC handling metrology ADC acquisition, 5 passive anti-tamper pin monitoring, and LCD segment driving. Use Value: Integrated 5-tamper-pin detection + RDP Level 2 + HDP blocks unauthorized firmware access and physical intrusion attempts. |
| Portable Gas Detector | Industrial Wireless Sensor Node |
Use Scenario: Battery-powered CO/H₂S detector with electrochemical sensor biasing, analog signal conditioning, and alarm triggering. IC Role / Device Role / Timing Role: Analog-intensive controller using OPAMP PGA, 12-bit DAC for sensor bias, and ultra-low-power comparators for threshold alerts. Use Value: Single-chip solution replaces discrete opamp, DAC, and comparator - reduces bill-of-materials by 4 components and improves calibration stability. | Use Scenario: LoRaWAN or NB-IoT node collecting vibration, temperature, and humidity data in factory environments. IC Role / Device Role / Timing Role: Edge processing unit executing sensor fusion algorithms, managing LPWAN modem interface, and retaining context in Standby mode. Use Value: 40-Kbyte SRAM with hardware parity and 30 nA Standby (RTC-off) ensures reliable long-term deployment under thermal cycling and EMI stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L073RZT6 | Same Cortex-M0+, but 64-Kbyte flash, no USB crystal-less, higher active current (110 μA/MHz), no LCD controller | Lacks integrated USB PHY and LCD driver - requires external transceiver and display IC for similar functionality | Select when USB/LCD are unnecessary and cost-sensitive design prioritizes minimal flash footprint |
| RA4M1ABGNEA#AC0 | Arm Cortex-M4F, 100 MHz, 256-Kbyte flash, but 220 nA Stop mode, no crystal-less USB, no LCD | Higher performance CPU but significantly higher sleep current - unsuitable for <1-year battery life targets | Choose only if floating-point math or DSP acceleration is mandatory and power budget allows ≥2× higher standby draw |
Compared with STM32L073RZT6 and RA4M1ABGNEA#AC0, the STM32U073K8U6 uniquely combines crystal-less USB, LCD driver, and industry-leading 16 nA shutdown current - making it the sole fit for compact, battery-critical applications requiring direct USB connectivity and on-chip display control.
Availability
STM32U073K8U6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, portable gas detectors, and industrial wireless sensor nodes requiring stable component supply, long-lifecycle assurance, and ECOPACK2-compliant packaging.
Supply support for STM32U073K8U6 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-grade components since 1987.
The STM32U0 series targets ultra-low-power embedded applications demanding extended battery life, robust security, and high integration - specifically engineered for IoT edge nodes, portable medical devices, and energy-metering systems.
FAQ
What is the maximum operating temperature range for STM32U073K8U6?
The STM32U073K8U6 is rated for ambient operation from –40 °C to +125 °C, with a junction temperature limit of +130 °C. This rating is confirmed in DS14548 Rev 2 Section 4.2 and applies to all packages including UFQFPN48. The device maintains full specification compliance across this range when supplied within the 1.71–3.6 V VDD window and with proper thermal layout.
Does STM32U073K8U6 support crystal-less USB operation out of the box?
Yes - the STM32U073K8U6 integrates a full-speed USB 2.0 PHY with built-in clock recovery, eliminating the need for an external 48 MHz crystal. This feature is enabled by default on PA9/PA10 and validated per AN5233 and DS14548 Section 7.3. No firmware configuration or external components are required to achieve USB enumeration.
How many GPIOs are available on the UFQFPN48 package of STM32U073K8U6?
The STM32U073K8U6 in UFQFPN48 provides 39 GPIOs, as specified in Table 1 of DS14548 Rev 2 (page 4). Of these, up to 33 are 5 V-tolerant. Pin count is constrained by the 48-pin footprint and excludes dedicated power, reset, and debug signals - full allocation is detailed in Section 7.1 (Pinouts) of the datasheet.
Is the 12-bit ADC capable of hardware oversampling to higher resolution?
Yes - the integrated 12-bit ADC supports configurable hardware oversampling up to 16-bit effective resolution, with programmable shift and accumulation. This is implemented in the ADC common control register (ADC_CCR) and documented in RM0503 Section 17.4.3. Oversampled results are delivered directly to memory via DMA without CPU intervention.
STM32U073K8U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- -
- Series:
- -
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- -
- Core Processor:
- -
- Core Size:
- -
- Speed:
- -
- Connectivity:
- -
- Peripherals:
- -
- Number of I/O:
- -
- Program Memory Size:
- -
- Program Memory Type:
- -
- EEPROM Size:
- -
- RAM Size:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Data Converters:
- -
- Oscillator Type:
- -
- Operating Temperature:
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- Grade:
- -
- Qualification:
- -
- Mounting Type:
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- Supplier Device Package:
STM32U073K8U6 FAQ
1.How can I place an order for STM32U073K8U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32U073K8U6 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 STM32U073K8U6 reliable?
The price and inventory of STM32U073K8U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32U073K8U6 is usually 5 days.
3.What payment methods are accepted for STM32U073K8U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32U073K8U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32U073K8U6?
STM32U073K8U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32U073K8U6 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 STM32U073K8U6?
For technical support, including STM32U073K8U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32U073K8U6 requirements.
6.How does Aetrix verify that STM32U073K8U6 is sourced from the original manufacturer or authorized distributors?
All STM32U073K8U6 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 STM32U073K8U6 meets industry standards.
7.What is the process for return or replacement of STM32U073K8U6?
All STM32U073K8U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32U073K8U6, 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 STM32U073K8U6 part is unused and in its original packaging.
Return procedure for STM32U073K8U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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