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STMicroelectronics STM32L151C6U6ATR
- Part No.:
- STM32L151C6U6ATR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-UFQFN Exposed Pad
- Datasheet:
-
STM32L151C6U6ATR.pdf
- Description:
- IC MCU 32BIT 32KB FLASH 48UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:4,148
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Product details
Overview
STM32L151C6U6ATR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 32 KB SRAM, 4 KB EEPROM with ECC, 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs - deployed in battery-powered medical sensors, portable industrial monitors, and smart utility meters requiring sub-2 µA Stop mode current and <8 µs wakeup.
For engineers reviewing the STM32L151C6U6ATR datasheet, STM32L151C6U6ATR pinout, STM32L151C6U6ATR application, or STM32L151C6U6ATR equivalent, key selection criteria include verified 1.65–3.6 V operation, RTC-enabled Standby current of 1.11 µA, USB 2.0 full-speed support with internal 48 MHz PLL, and 73 I/Os (5V tolerant) mappable to 16 external interrupt vectors.
Technical Context
The device implements a tightly integrated ultra-low-power architecture with dynamic voltage scaling, multiple clock domains (HSI/MSI/LSE/HSE), and five low-power modes (Run, Sleep, Low-power Run, Stop, Standby) governed by a dedicated power control block with programmable voltage detector and brownout reset thresholds. Its memory subsystem includes ECC-protected Flash and true EEPROM for robust data retention in harsh environments.
Peripherals are partitioned across voltage domains: analog blocks (ADC, DAC, comparators) operate down to 1.8 V; digital I/Os support 5V tolerance; USB PHY uses dedicated 3.3 V supply; and LCD driver (excluded in STM32L151x6-A variants) is omitted - confirming this part lacks on-chip LCD controller functionality per Table 1 and Section 3.9 of the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | ARM Cortex-M3, 32-bit, up to 32 MHz - delivers 1.25 DMIPS/MHz for deterministic real-time control in resource-constrained edge nodes. |
| Memory | 128 KB Flash (ECC), 32 KB SRAM, 4 KB EEPROM (ECC) - enables firmware updates with error correction and nonvolatile parameter storage without external EEPROM. |
| Power Consumption | 0.44 µA Stop mode (16 wakeup lines), 1.11 µA Standby + RTC - supports >10-year battery life in metering and sensor applications. |
| Analog Peripherals | 12-bit ADC (1 Msps, 24 channels), 2×12-bit DACs with buffers, 2×ultra-low-power comparators - supports precision signal acquisition and analog output generation at 1.8 V minimum supply. |
| Communication | 1×USB 2.0 FS (48 MHz PLL), 3×USART (IrDA/ISO 7816), 2×SPI (16 Mbit/s), 2×I²C (SMBus/PMBus) - enables secure wired connectivity and legacy protocol interoperability. |
| I/O & Timers | 73 GPIOs (5V tolerant), 10 timers including 6×16-bit general-purpose (4-channel PWM), 2×watchdogs - supports complex peripheral control and safety-critical timing functions. |
| Package | UFQFPN48, 7 × 7 mm, 0.5 mm pitch - compact footprint suitable for space-constrained portable and wearable designs. |
Pinout & Package
STM32L151C6U6ATR is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN48) package with 0.5 mm pitch and exposed thermal pad. Pin assignments follow ST's standard L151x6-A pinout layout for UFQFPN48, validated against Table 9 (Pin Definitions) and Figure 12 (UFQFPN48 pinout) in DocID024330 Rev 5.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate domains for digital core (VDD), analog (VDDA), and I/O (VDDIO2) enable noise isolation and flexible rail sequencing. |
| VSS, VSSA, VSSIO2 | Ground returns | Dedicated analog (VSSA) and I/O (VSSIO2) grounds minimize coupling noise into sensitive ADC/DAC paths. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15 | General-purpose I/Os | 73 total GPIOs; 5V-tolerant on most pins - simplifies level-shifting in mixed-voltage systems. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external reset supervisors and pushbutton debouncing circuits. |
| BOOT0 | Boot mode selection | High at power-on selects system memory bootloader (USART-based firmware update); low selects user Flash execution. |
| USB_DP / USB_DM | USB 2.0 full-speed differential pair | Integrated PHY with internal termination - eliminates need for external resistors and reduces BOM count. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power modes | Stop mode @ 0.44 µA with 16 wakeup lines and <8 µs wakeup time - enables rapid response to external events while preserving energy. |
| ECC memory protection | Hardware ECC on Flash and EEPROM - prevents silent data corruption in long-life deployments without software overhead. |
| Multi-speed internal RC oscillators | MSI (65 kHz–4.2 MHz), HSI (16 MHz ±1%), LSI (37 kHz) - eliminates external crystals for cost-sensitive applications while maintaining timing flexibility. |
| Capacitive touch sensing | 20-channel CTSU supporting touchkey, linear, and rotary sensors - enables intuitive HMI without dedicated touch controller IC. |
| Programmable voltage detector | PVD with 8 selectable thresholds - allows adaptive brownout detection aligned to battery discharge curve or system voltage margin. |
Applications
| Wearable Health Monitor | Smart Gas Meter |
|---|---|
|
Use Scenario: Continuous ECG/temperature logging with Bluetooth LE telemetry and rechargeable coin-cell power. IC Role / Device Role / Timing Role: Main system controller managing analog front-end sampling, USB/USART firmware updates, and RTC-backed timestamping. Use Value: Sub-µA Stop mode extends battery life beyond 2 years; integrated 12-bit ADC and DAC eliminate external signal conditioning components. |
Use Scenario: Battery-operated ultrasonic flow measurement with tamper detection, valve control, and LoRaWAN backhaul. IC Role / Device Role / Timing Role: Real-time flow computation engine using timer-triggered ADC sampling and PWM-driven solenoid valves. Use Value: 1.38 µA Stop mode + RTC sustains 10+ year field deployment; 5V-tolerant I/Os interface directly with industrial-level sensors and actuators. |
| Industrial Wireless Sensor Node | Portable Data Logger |
|
Use Scenario: Temperature/humidity/pressure monitoring in remote HVAC ducts with solar charging and NB-IoT uplink. IC Role / Device Role / Timing Role: Low-power coordinator handling sensor fusion, secure boot, and encrypted packet assembly before transmission. Use Value: Dual 12-bit DACs calibrate sensor offsets; CRC unit ensures firmware integrity during OTA updates over constrained links. |
Use Scenario: Field-deployed environmental logger capturing GPS-tagged air quality metrics every 15 minutes for 5 years. IC Role / Device Role / Timing Role: Autonomous data acquisition controller with EEPROM-based event logging and watchdog-secured runtime. Use Value: 4 KB EEPROM with ECC stores 100k+ timestamped readings without wear leveling; 10 nA I/O leakage prevents battery drain during extended idle periods. |
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 |
|---|---|---|---|
| STM32L051K8U6 | ARM Cortex-M0+, 64 KB Flash, 8 KB RAM, no EEPROM, lower peripheral count (1×ADC, no DAC), 0.33 µA Stop mode | Suitable for simpler sensor nodes where EEPROM and dual DACs are unnecessary | Select when cost and code size are primary constraints and analog feature set can be reduced. |
| STM32L431CCU6 | ARM Cortex-M4F, 256 KB Flash, 64 KB SRAM, no EEPROM, higher performance (80 MHz), 0.8 µA Stop mode, no 5V-tolerant I/Os | Better for floating-point math (e.g., FFT-based vibration analysis) but requires level shifters for 5V peripherals | Choose when computational throughput outweighs ultra-low-power requirements and external level translation is acceptable. |
Compared with STM32L151C6U6ATR, STM32L051K8U6 trades EEPROM and dual DACs for lower cost and smaller footprint, while STM32L431CCU6 sacrifices sub-µA Stop current and 5V tolerance for Cortex-M4F performance - making the L151 optimal for balanced ultra-low-power, mixed-signal, and industrial I/O needs.
Availability
STM32L151C6U6ATR is available at Aetrix Electronics and suitable for battery-powered medical sensors, smart utility meters, and portable industrial monitors requiring stable component supply across multi-year production cycles.
Supply support for STM32L151C6U6ATR 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.
The STM32L1 series targets ultra-low-power embedded applications demanding long battery life, robust memory integrity, and rich analog integration - optimized for metering, wearables, and industrial IoT endpoints.
FAQ
Does STM32L151C6U6ATR include an integrated LCD controller?
No. The STM32L151C6U6ATR belongs to the STM32L151x6-A subfamily, which explicitly excludes the LCD driver - confirmed in Section 3.9 and Table 1 of the datasheet (DocID024330 Rev 5). Only STM32L152x6/8/B-A variants include the LCD controller.
What is the maximum operating temperature for STM32L151C6U6ATR?
The device is rated for -40°C to +105°C ambient operating temperature, validated per Section 6.3.1 (General Operating Conditions) and Table 14 of the datasheet. This extended range supports deployment in automotive under-hood modules and industrial enclosures without active cooling.
Can STM32L151C6U6ATR run USB without an external crystal?
Yes. The MCU integrates a 48 MHz PLL fed by its internal 16 MHz HSI oscillator (±1% factory-trimmed), enabling full-speed USB 2.0 operation without an external crystal - verified in Section 3.4 (Clock Management) and Table 34 (PLL characteristics).
How many I/O pins support 5V tolerance on STM32L151C6U6ATR?
73 GPIOs are 5V tolerant, as stated in the "Features" section (page 1) and Section 3.6 (GPIOs) of the datasheet. This applies to all I/Os except those dedicated to USB, JTAG/SWD, and BOOT0 - enabling direct interfacing with legacy 5V logic and sensors.
STM32L151C6U6ATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-UFQFN Exposed Pad
- Series:
- STM32L1
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M3
- Core Size:
- 32-Bit Single-Core
- Speed:
- 32MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, Cap Sense, DMA, I2S, POR, PWM, WDT
- Number of I/O:
- 37
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 16K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L151C6U6ATR FAQ
1.How can I place an order for STM32L151C6U6ATR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151C6U6ATR 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 STM32L151C6U6ATR reliable?
The price and inventory of STM32L151C6U6ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151C6U6ATR is usually 5 days.
3.What payment methods are accepted for STM32L151C6U6ATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151C6U6ATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151C6U6ATR?
STM32L151C6U6ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151C6U6ATR 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 STM32L151C6U6ATR?
For technical support, including STM32L151C6U6ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151C6U6ATR requirements.
6.How does Aetrix verify that STM32L151C6U6ATR is sourced from the original manufacturer or authorized distributors?
All STM32L151C6U6ATR 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 STM32L151C6U6ATR meets industry standards.
7.What is the process for return or replacement of STM32L151C6U6ATR?
All STM32L151C6U6ATR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151C6U6ATR, 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 STM32L151C6U6ATR part is unused and in its original packaging.
Return procedure for STM32L151C6U6ATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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