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STMicroelectronics STM8L151C6U3TR
- Part No.:
- STM8L151C6U3TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM8L151C6U3TR.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,054
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Product details
Overview
STM8L151C6U3TR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 32 KB Flash, 1 KB data EEPROM with ECC, 2 KB RAM, 12-bit ADC (1 Msps, 25 channels), 12-bit DAC, two ultra-low-power comparators, RTC with BCD calendar and auto-wakeup, and integrated capacitive touch sensing (up to 16 channels). It operates from 1.65 V to 3.6 V across –40 °C to +85 °C and targets battery-powered sensor nodes and portable medical devices.
For engineers reviewing the STM8L151C6U3TR datasheet, STM8L151C6U3TR pinout, STM8L151C6U3TR application, or STM8L151C6U3TR equivalent, key selection criteria include verified Halt-mode current (350 nA), fast wakeup time (4.7 µs), RTC calendar accuracy with external 32 kHz crystal, SWIM debug interface compatibility, and UFQFPN48 package thermal performance in compact wearable designs.
Technical Context
The STM8L151C6U3TR implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates dual clock domains: high-speed (1–16 MHz HSE or 16 MHz factory-trimmed RC) and low-speed (32 kHz LSE or 38 kHz RC), managed by a Clock Security System for fault detection.
Its power architecture supports five distinct low-power modes - including Active-halt (1.3 µA with full RTC) and Halt (350 nA) - with per-pin leakage limited to 50 nA and guaranteed 4.7 µs wake-up from Halt. Peripheral clock gating and autonomous DMA (4 channels) enable sensor data acquisition without CPU intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit STM8 Harvard core with 3-stage pipeline; enables deterministic real-time execution and efficient interrupt handling in resource-constrained systems. |
| Max Operating Frequency | 16 MHz; delivers 16 CISC MIPS peak performance while maintaining ultra-low active power (195 µA/MHz + 440 µA). |
| Halt Mode Current | 350 nA at 3.0 V, –40 °C to +85 °C; enables multi-year battery life in always-on environmental monitors. |
| ADC Resolution & Speed | 12-bit, up to 1 Msps across 25 channels; supports simultaneous sampling of temperature, voltage, and analog sensor inputs with internal reference. |
| DAC Output | 12-bit buffered DAC on PB4/PB5/PB6; provides precise analog biasing or calibration signal generation without external components. |
| RTC Functionality | BCD calendar with alarm and periodic auto-wakeup from Halt mode; eliminates need for external real-time clock IC in time-stamped logging applications. |
| Capacitive Sensing | Up to 16-channel hardware-accelerated touch sensing; enables robust proximity, touchkey, and rotary control in moisture-prone industrial interfaces. |
Pinout & Package
STM8L151C6U3TR is housed in a 48-pin UFQFPN (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad. This leadless package supports high I/O density and improved thermal dissipation in space-constrained PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domain: VDD powers digital/analog peripherals; separate VDDA ensures stable ADC/DAC reference under noisy conditions. |
| NRST | Active-low reset input | Accepts standard push-pull or open-drain reset sources; supports programmable voltage detector (PVD) monitoring for brownout recovery. |
| SWIM | Single-wire interface for debug | Enables non-intrusive programming and real-time debugging using one dedicated pin-no JTAG header required. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | All 41 pins support interrupt mapping and configurable pull-up/down; 16 support capacitive sensing with built-in charge transfer logic. |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz external crystals; paired with internal trimming for ±1% frequency stability over temperature and voltage. |
| LSE_IN / LSE_OUT | LSE crystal oscillator terminals | Drives 32.768 kHz watch crystal for RTC; enables calendar operation and sub-µA wakeup timing independent of main clock. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Halt mode | 350 nA consumption with RTC running-enables >10-year coin-cell battery life in metering applications. |
| Hardware capacitive sensing controller | 16-channel scan engine with automatic baseline compensation-eliminates firmware overhead for touch UI in wearables. |
| Flexible memory protection | Read-while-write (RWW) Flash and ECC-protected EEPROM-supports field firmware updates and secure parameter storage. |
| Dual-speed clock system | Independent high-speed (16 MHz) and low-speed (38 kHz RC / 32 kHz crystal) domains-enables concurrent processing and precision timing. |
| Autonomous peripheral operation | DMA-driven ADC-to-memory transfers and timer-triggered DAC updates-reduces CPU load and extends sleep duration. |
Applications
| Smart Utility Metering | Portable Medical Sensor |
|---|---|
Use Scenario: Battery-powered water/gas meter with hourly pulse counting, temperature compensation, and tamper detection. IC Role / Device Role / Timing Role: Main system controller managing pulse capture via input capture timers, RTC-based timestamping, and low-power sleep between readings. Use Value: 350 nA Halt mode and 4.7 µs wakeup ensure >15-year battery life while maintaining accurate timekeeping and event logging. |
Use Scenario: Disposable ECG patch with single-lead acquisition, motion artifact filtering, and Bluetooth LE data streaming. IC Role / Device Role / Timing Role: Analog front-end controller performing 12-bit ADC sampling, digital filtering, and SPI communication to BLE SoC. Use Value: Integrated 12-bit ADC (1 Msps) and hardware-accelerated capacitive sensing enable reliable electrode contact detection without added components. |
| Industrial Wireless Node | Home Appliance Control Panel |
Use Scenario: LoRaWAN-enabled temperature/humidity node deployed in HVAC ducts with 10-year maintenance interval. IC Role / Device Role / Timing Role: Sensor aggregator acquiring data via I²C sensors, computing dew point, and triggering periodic RF transmission bursts. Use Value: Ultra-low leakage I/O (50 nA/pin) prevents battery drain during long idle periods; RTC alarm wakes MCU only when measurement window opens. |
Use Scenario: Touch-sensitive oven control panel operating in high-temperature kitchen environments (up to 85 °C ambient). IC Role / Device Role / Timing Role: Capacitive touch controller with proximity wake-up and segmented LED driver interface. Use Value: Built-in 16-channel touch sensing tolerates condensation and glove use; wide-temp Flash/ECC memory ensures firmware integrity over product lifetime. |
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 |
|---|---|---|---|
| STM8L052C6T6 | 16 KB Flash, no RTC calendar, no DAC, 1.8–3.6 V operation only (no 1.65 V support) | Suitable for simpler sensor endpoints where calendar timekeeping and analog output are unnecessary | Select when cost sensitivity outweighs RTC/DAC requirements and extended voltage range is not needed. |
| STM32L053R8T6 | 32-bit ARM Cortex-M0+, 64 KB Flash, 8 KB RAM, same 350 nA Halt current, but requires SWD instead of SWIM | Better suited for applications needing higher compute throughput or existing ARM toolchain integration | Choose when migrating from legacy STM8 codebase is impractical or when future scalability to BLE/USB is anticipated. |
Compared with STM8L052C6T6, STM8L151C6U3TR adds RTC calendar, DAC, and deeper voltage support for energy harvesting; versus STM32L053R8T6, it retains SWIM simplicity and lower gate count for minimal firmware footprints in deeply embedded roles.
Availability
STM8L151C6U3TR is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, industrial wireless nodes, and home appliance control panels requiring stable component supply across extended product lifecycles.
Supply support for STM8L151C6U3TR 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, MEMS, and automotive semiconductors since 1987.
The STM8L ultra-low-power MCU family was engineered specifically for battery-operated and energy-harvesting applications demanding sub-microamp sleep currents, integrated analog peripherals, and long-term industrial reliability without sacrificing development simplicity.
FAQ
What is the maximum allowed VDD voltage for STM8L151C6U3TR?
The absolute maximum VDD rating is 4.0 V, but the device is specified for reliable operation within 1.65 V to 3.6 V. Operation above 3.6 V may cause permanent damage or unpredictable behavior, especially to the internal voltage regulator and analog peripherals like the ADC and DAC.
Does STM8L151C6U3TR support true hardware AES encryption?
No. The STM8L151C6U3TR does not include a hardware AES engine. It offers software-based cryptographic libraries via ST's STM8L Standard Peripherals Library, but lacks dedicated crypto accelerators. For secure boot or OTA update signing, external secure elements or software-only implementations are required.
Can the internal 38 kHz RC oscillator be used as the RTC clock source?
Yes-the internal 38 kHz low-consumption RC oscillator can drive the RTC, but its typical accuracy is ±30% over temperature and voltage. For calendar-grade timekeeping, ST recommends using the external 32.768 kHz crystal (LSE) connected to LSE_IN/LSE_OUT, which achieves ±20 ppm accuracy with proper load capacitance.
Is SWIM debug supported in all low-power modes?
SWIM is fully functional in Run, Wait, and Low Power Run modes. It is disabled in Low Power Wait, Active-halt, and Halt modes to preserve ultra-low current. Debug access must be re-established after waking to Run mode; no breakpoint or halt capability exists while in deep sleep states.
STM8L151C6U3TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM8L EnergyLite
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, IrDA, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, IR, POR, PWM, WDT
- Number of I/O:
- 41
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 25x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8L151C6U3TR FAQ
1.How can I place an order for STM8L151C6U3TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8L151C6U3TR 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 STM8L151C6U3TR reliable?
The price and inventory of STM8L151C6U3TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8L151C6U3TR is usually 5 days.
3.What payment methods are accepted for STM8L151C6U3TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8L151C6U3TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8L151C6U3TR?
STM8L151C6U3TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8L151C6U3TR 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 STM8L151C6U3TR?
For technical support, including STM8L151C6U3TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8L151C6U3TR requirements.
6.How does Aetrix verify that STM8L151C6U3TR is sourced from the original manufacturer or authorized distributors?
All STM8L151C6U3TR 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 STM8L151C6U3TR meets industry standards.
7.What is the process for return or replacement of STM8L151C6U3TR?
All STM8L151C6U3TR units undergo pre-shipment inspection (PSI). If there is an issue with STM8L151C6U3TR, 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 STM8L151C6U3TR part is unused and in its original packaging.
Return procedure for STM8L151C6U3TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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