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STMicroelectronics STM32L082CZU6
- Part No.:
- STM32L082CZU6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32L082CZU6.pdf
- Description:
- IC MCU 32BIT 192KB FLSH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,418
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Product details
Overview
STM32L082CZU6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller with 192 KB Flash, 20 KB SRAM, and 6 KB EEPROM; features USB 2.0 (crystal-less), dual 12-bit DACs, 12-bit ADC (1.14 Msps), AES-128 hardware encryption, and operates from 1.65 V to 3.6 V across –40 °C to +125 °C - deployed in battery-powered IoT sensor nodes requiring secure, long-life operation.
For engineers reviewing the STM32L082CZU6 datasheet, STM32L082CZU6 pinout, STM32L082CZU6 application, or STM32L082CZU6 equivalent, key selection considerations include standby current (0.29 µA), USB crystal-less timing accuracy, DAC output buffer voltage range (down to 1.8 V), and WLCSP36 package thermal performance for space-constrained designs.
Technical Context
The STM32L082CZU6 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and multiple low-power modes including Stop mode with RTC + 20 KB RAM retention at 0.86 µA. Its clock system combines HSI16 (±1%), HSI48 (self-calibrated for USB), LSE (32 kHz RTC), and PLL for flexible CPU frequency up to 32 MHz.
Analog subsystem includes two independent 12-bit DACs with output buffers, a 12-bit ADC with 13 channels and 1.14 Msps sampling, and two ultra-low-power comparators with wake-up capability down to 1.65 V - all operating within the same ultra-low-voltage envelope as the digital domain.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M0+ with MPU, 32 MHz max - enables deterministic real-time control with memory protection in resource-constrained edge devices. |
| Flash / SRAM / EEPROM | 192 KB Flash (ECC, read-while-write), 20 KB SRAM, 6 KB EEPROM (ECC) - supports robust firmware updates, data logging, and parameter storage without external nonvolatile memory. |
| USB Interface | Crystal-less USB 2.0 full-speed - eliminates external crystal and matching components, reducing BOM cost and PCB area in portable applications. |
| Low-Power Performance | 0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20 KB RAM retention - extends battery life to multi-year operation in coin-cell–powered sensors. |
| Analog Peripherals | 12-bit ADC (1.14 Msps, 13 ch), 2×12-bit DACs with buffers (1.8 V min supply), 2×ULP comparators - enables high-fidelity signal acquisition and analog output generation within same low-voltage domain. |
| Crypto & Security | AES-128 hardware engine + true RNG + firewall protection - provides authenticated firmware updates and encrypted sensor data transmission without CPU overhead. |
| Operating Range | 1.65 V to 3.6 V supply, –40 °C to +125 °C - supports industrial-grade deployment in harsh environments including metering and automotive body electronics. |
Pinout & Package
STM32L082CZU6 is housed in a 36-ball WLCSP (2.61 × 2.88 mm, 0.4 mm pitch), optimized for minimal footprint and thermal performance in ultra-compact wearable and sensor modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core, SRAM, and most peripherals; requires local decoupling for low-noise operation in sensitive analog measurements. |
| VSS | Ground reference | Digital and analog ground planes must be connected at single point near VSS balls to minimize noise coupling into ADC/DAC paths. |
| PA0–PA15, PB0–PB11, PC0–PC7, PH0–PH1 | General-purpose I/Os (34 tolerant to 5 V) | Support multiple alternate functions including USB D+/D−, ADC inputs, DAC outputs, and touch sensing channels - configurable per application need. |
| PA11/PA12 | USB D−/D+ | Dedicated crystal-less USB interface pins; internal transceivers and trimming eliminate external oscillator - critical for compact USB-C peripheral designs. |
| VBAT | Backup power supply | Connects to coin cell or supercap to retain RTC and 20-byte backup registers during main power loss - enables time-stamped event logging. |
| NRST | Active-low reset input | Accepts standard push-pull or open-drain reset sources; internal pull-up ensures reliable startup without external resistor in most designs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 0.29 µA with 3 wakeup pins active - enables decade-scale battery life in maintenance-free environmental monitors. |
| Crystal-less USB | HSI48 self-calibration against USB SOF packets achieves ±0.25% accuracy - removes crystal, load caps, and layout sensitivity while maintaining full-speed compliance. |
| Dual buffered DACs | Two independent 12-bit DACs with rail-to-rail output buffers operating down to 1.8 V - drives analog actuators or reference voltages directly without external op-amps. |
| Capacitive touch controller | Up to 19-channel TSC supporting touchkey, linear, and rotary sensors - enables intuitive HMI in space-limited medical or home automation devices. |
| Hardware AES-128 | Dedicated crypto engine with DMA support - encrypts sensor payloads at line rate without stalling CPU, essential for LoRaWAN or NB-IoT edge security. |
Applications
| Smart Utility Metering | Portable Medical Sensor |
|---|---|
Use Scenario: Battery-powered water/gas meter with hourly pulse counting, temperature compensation, and encrypted RF upload. IC Role / Device Role / Timing Role: Main MCU managing metrology ADC, RTC timestamping, AES-encrypted LoRa transmission, and ultra-low-power sleep scheduling. Use Value: 0.29 µA standby and 5 µs wake-up from Flash enable >10-year coin-cell operation while maintaining precise timekeeping and secure data integrity. | Use Scenario: Wearable ECG patch capturing analog biopotentials, performing on-device filtering, and transmitting via BLE or USB. IC Role / Device Role / Timing Role: Signal acquisition hub with 12-bit ADC (1.14 Msps), dual DACs for calibration reference generation, and USB crystal-less interface for host configuration. Use Value: Integrated DAC buffers (1.8 V min) and ultra-low-noise ADC enable clinical-grade signal fidelity without external analog front-end components. |
| Industrial Wireless Node | Secure Asset Tracker |
Use Scenario: Ruggedized vibration/temperature node in factory equipment, reporting via NB-IoT with tamper detection. IC Role / Device Role / Timing Role: Edge processor executing sensor fusion, watchdog-monitored firmware, AES-encrypted payload signing, and RTC-based duty cycling. Use Value: Hardware firewall + true RNG + 6 KB ECC EEPROM ensure firmware integrity and secure key storage - meeting IEC 62443-3-3 SL2 requirements. | Use Scenario: GPS-enabled logistics tracker with motion-triggered wake-up, geofence alerts, and encrypted cellular uploads. IC Role / Device Role / Timing Role: Low-power coordinator managing GPS UART, accelerometer interrupt wake-up, AES-encrypted MQTT publish, and VBAT-backed RTC for time-synchronized events. Use Value: 0.86 µA Stop mode + RTC + 20 KB RAM retention preserves context and schedule across weeks of inactivity - eliminating cold-start delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L072CZU6 | Same WLCSP36 package, but 128 KB Flash, no USB, no DAC - lacks crystal-less USB and analog output capability. | Suitable for simpler sensor nodes without USB connectivity or analog actuation needs. | Select when USB and DAC are unnecessary and cost reduction is prioritized over feature headroom. |
| STM32L432KCU6 | Cortex-M4F core, 256 KB Flash, 64 KB SRAM, USB, but higher active current (81 µA/MHz) and no EEPROM. | Better for compute-intensive tasks (e.g., FFT-based vibration analysis), but less optimal for multi-year battery life. | Choose when floating-point math or larger code size is required, accepting trade-off in standby power and EEPROM absence. |
Compared with STM32L072CZU6, the STM32L082CZU6 adds USB and DACs at identical package size and standby current; versus STM32L432KCU6, it trades processing headroom for significantly lower static power and integrated EEPROM - making it superior for energy-constrained, analog-rich edge endpoints.
Availability
STM32L082CZU6 is available at Aetrix Electronics and suitable for smart metering, portable medical sensors, industrial wireless nodes, and secure asset trackers requiring stable component supply across extended product lifecycles.
Supply support for STM32L082CZU6 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, secure firmware execution, and rich analog integration - optimized for IoT endpoints where energy, security, and size are primary constraints.
FAQ
Does STM32L082CZU6 support USB without an external crystal?
Yes. The device integrates a self-calibrating 48 MHz HSI48 RC oscillator synchronized to USB Start-of-Frame (SOF) tokens, achieving ±0.25% accuracy - eliminating need for external crystal, load capacitors, or associated PCB layout constraints.
What is the minimum supply voltage for the DAC outputs to function?
The dual 12-bit DACs operate with output buffers enabled down to 1.8 V VDD - verified per DS10688 Section 6.3.16 - enabling direct drive of analog circuits (e.g., sensor biasing, reference generation) in low-voltage battery systems without level-shifting.
How many I/O pins are 5 V tolerant on STM32L082CZU6?
34 GPIOs are 5 V tolerant (as specified in DS10688 Section 2.1 and Table 1), allowing direct interfacing with legacy 5 V logic or sensors without external level translators - critical for mixed-voltage industrial sensor hubs.
Is the 6 KB EEPROM emulated in Flash or implemented as dedicated silicon?
The 6 KB EEPROM is implemented as dedicated silicon with ECC protection (DS10688 Section 3.8), not Flash emulation - providing guaranteed endurance (100k cycles), retention (40 years at 85 °C), and concurrent read/write capability independent of main Flash operations.
STM32L082CZU6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32L0
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M0+
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, I2S, LCD, POR, PWM, WDT
- Number of I/O:
- 40
- Program Memory Size:
- 192KB (192K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 6K x 8
- RAM Size:
- 20K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 13x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L082CZU6 FAQ
1.How can I place an order for STM32L082CZU6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L082CZU6 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 STM32L082CZU6 reliable?
The price and inventory of STM32L082CZU6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L082CZU6 is usually 5 days.
3.What payment methods are accepted for STM32L082CZU6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L082CZU6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L082CZU6?
STM32L082CZU6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L082CZU6 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 STM32L082CZU6?
For technical support, including STM32L082CZU6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L082CZU6 requirements.
6.How does Aetrix verify that STM32L082CZU6 is sourced from the original manufacturer or authorized distributors?
All STM32L082CZU6 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 STM32L082CZU6 meets industry standards.
7.What is the process for return or replacement of STM32L082CZU6?
All STM32L082CZU6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L082CZU6, 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 STM32L082CZU6 part is unused and in its original packaging.
Return procedure for STM32L082CZU6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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