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STMicroelectronics STM32L151C8T6TR
- Part No.:
- STM32L151C8T6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L151C8T6TR.pdf
- Description:
- IC MCU 32BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,829
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Product details
Overview
STM32L151C8T6TR from STMicroelectronics is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller in LQFP48 package, featuring 128 KB Flash, 16 KB SRAM, 4 KB EEPROM with ECC, 12-bit ADC (1 Msps, 24 channels), dual 12-bit DACs, USB 2.0 interface, and LCD driver support - deployed in battery-powered medical sensors and portable industrial data loggers.
For engineers reviewing the STM32L151C8T6TR datasheet, STM32L151C8T6TR pinout, STM32L151C8T6TR application, or STM32L151C8T6TR equivalent, key selection criteria include standby current (0.3 µA), RTC-enabled stop mode (1.2 µA), 32 MHz max CPU frequency, 73 5V-tolerant I/Os, and integrated capacitive touch sensing (20 channels).
Technical Context
The STM32L151C8T6TR implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with sub-µA retention states. Its Cortex-M3 core operates from 32 kHz to 32 MHz, supported by five clock sources including factory-trimmed 16 MHz HSI (±1%), 32 kHz LSE for RTC calibration, and PLL for USB 48 MHz clock generation.
Peripherals are partitioned across power domains: analog subsystem (ADC, DAC, comparators) functions down to 1.8 V; digital I/Os support 5V tolerance on 73 pins; and the 80-byte backup register + 4 KB EEPROM retain data across power cycles. The device includes a CRC calculation unit and 96-bit unique ID for firmware integrity and device identification.
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 (with ECC), 16 KB SRAM, 4 KB true EEPROM (with ECC) - enables robust firmware storage, runtime variable retention, and wear-leveling-capable nonvolatile parameter storage. |
| Power Consumption | 0.3 µA Standby (3 wakeup pins), 1.2 µA Stop + RTC - extends coin-cell or energy-harvesting battery life to multi-year operation in always-on sensor endpoints. |
| Analog Peripherals | 12-bit ADC (1 Msps, 24 channels), 2×12-bit DACs with buffers, 2×ultra-low-power comparators - supports precision sensor signal acquisition, analog output control, and windowed threshold detection without external components. |
| Communication | 1×USB 2.0 FS, 3×USART (ISO 7816/IrDA), 2×SPI (16 Mbit/s), 2×I²C (SMBus/PMBus) - enables direct PC connectivity, smart-card interfacing, high-speed sensor bus aggregation, and power-management bus communication. |
| I/O & Timing | 73 fast I/Os (5V tolerant), 10 timers (6×16-bit advanced, 2×basic, 2×watchdogs), 20-channel capacitive sensing - supports mixed-signal system integration, motor control PWM generation, safety-critical timeout supervision, and touch UI without overlay components. |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for compact PCB layouts in space-constrained portable devices and conforms to JEDEC MO-220 standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 1.65–3.6 V supply domain supporting independent analog/digital regulation; decoupling required per datasheet Section 6.1.6. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2 | General-purpose I/O | 73 total GPIOs; 5V-tolerant on all except analog inputs; mappable to 16 EXTI lines for flexible wake-up and interrupt routing. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts 1.65–3.6 V logic; supports external reset button or supervisor IC connection. |
| BOOT0 | Boot mode selection | High at reset enables system memory bootloader via USART; low selects main Flash memory execution - critical for field firmware updates. |
| USB_DP / USB_DM | USB 2.0 full-speed differential pair | Integrated transceivers require no external PHY; 1.5 kΩ pull-up on DP for device enumeration; supports CDC/VCP and HID class implementations. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power architecture | 0.57 µA Stop mode (16 wakeup lines) and <8 µs wake-up time - enables rapid response to sensor events while minimizing average system current. |
| Embedded memory protection | Memory Protection Unit (MPU) with configurable regions - enforces privilege separation between firmware modules for secure bootloader and application partitioning. |
| Hardware-accelerated peripherals | DMA controller (7 channels), CRC unit, and 96-bit unique ID - offloads CPU from data movement, ensures firmware image integrity, and enables device-specific licensing. |
| Capacitive touch sensing | 20-channel CTSU supporting touchkey, linear, and rotary sensors - eliminates mechanical buttons and reduces BOM cost in HMI applications. |
| Programmable voltage detector | PVD with 8 selectable thresholds (2.0–2.9 V) - provides early warning of brownout conditions before system reset, enabling graceful shutdown or data save. |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition with Bluetooth LE telemetry and multi-year battery life. IC Role / Device Role / Timing Role: Central MCU managing analog front-end sampling, USB/USART firmware updates, RTC timestamping, and low-power sleep scheduling. Use Value: Sub-µA standby and 1.2 µA Stop+RTC enable >5-year operation on CR2032; integrated 12-bit ADC/DAC eliminate external signal chain components. |
Use Scenario: Tamper-resistant electricity/water meter with pulse counting, LCD display, and secure firmware updates over optical port. IC Role / Device Role / Timing Role: Main controller executing metrology algorithms, driving segment LCD, validating firmware signatures via CRC+unique ID, and managing optical UART communication. Use Value: 4 KB EEPROM with ECC stores calibration constants and tamper logs; 5V-tolerant I/Os interface directly with optical coupler circuits without level shifters. |
| Industrial Wireless Sensor Node | Portable Diagnostic Tool |
Use Scenario: Battery-powered vibration/temperature node transmitting data via LoRaWAN gateway using SPI-connected transceiver. IC Role / Device Role / Timing Role: Host processor handling sensor fusion (ADC + temp sensor), SPI master to RF module, and adaptive duty cycling based on motion-triggered wake-up. Use Value: 20-channel capacitive sensing detects enclosure opening; ultra-low I/O leakage (10 nA) prevents false triggers in high-impedance sensor interfaces. |
Use Scenario: Handheld medical device performing real-time waveform analysis, battery monitoring, and USB-CDC host communication with PC software. IC Role / Device Role / Timing Role: Real-time signal processor running FFT-based diagnostics, USB device endpoint, and dual DAC-driven analog test stimulus generator. Use Value: Dual buffered 12-bit DACs generate precise test waveforms; USB 2.0 FS enables plug-and-play PC connectivity without external PHY or driver installation. |
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 |
|---|---|---|---|
| STM32L071KBT6 | ARM Cortex-M0+, 64 KB Flash, 20 KB RAM, no USB, no LCD, lower peripheral count | Suitable for simpler sensor nodes without USB or display; lacks DAC and capacitive sensing | Select when cost and code size are prioritized over analog feature richness and USB connectivity. |
| STM32L431RCT6 | Cortex-M4F, 256 KB Flash, 64 KB SRAM, USB, no EEPROM, higher active current (80 µA/MHz) | Better for DSP-intensive tasks (e.g., audio processing); requires external nonvolatile storage for parameter retention | Choose when floating-point math or higher throughput is needed, and battery life is secondary to compute capability. |
Compared with STM32L151C8T6TR, the STM32L071KBT6 trades analog integration and USB for lower cost and smaller footprint, while the STM32L431RCT6 upgrades CPU performance and memory at the expense of ultra-low-power efficiency and embedded EEPROM.
Availability
STM32L151C8T6TR is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable diagnostic tools requiring stable component supply across multi-year production cycles.
Supply support for STM32L151C8T6TR 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 STM32L1 series targets ultra-low-power embedded applications where battery longevity, analog integration, and security coexist - designed specifically for medical, metering, and portable industrial equipment demanding sub-µA sleep and robust firmware resilience.
FAQ
Does STM32L151C8T6TR support USB device mode without external crystal?
Yes - it integrates an internal 48 MHz PLL fed by the 16 MHz HSI oscillator, enabling full-speed USB 2.0 device operation without an external crystal. The HSI is factory-trimmed to ±1% accuracy, meeting USB suspend/resume timing requirements per USB 2.0 specification Section 7.1.7.2.
What is the maximum operating temperature for industrial-grade STM32L151C8T6TR?
The STM32L151C8T6TR is rated for operation from –40°C to +85°C ambient temperature. This industrial temperature grade is confirmed in Table 6.3.1 (General operating conditions) of the official datasheet DocID17659 Rev 12, and applies to all LQFP48-packaged variants in the STM32L151x6/8/B family.
Can the 4 KB EEPROM be used for storing calibration data across power cycles?
Yes - the 4 KB true EEPROM includes built-in ECC and supports 400K write/erase cycles with 20-year data retention at 85°C. It is accessed via dedicated PEC (Program/Erase Controller) peripheral and retains values during all low-power modes including Standby, making it ideal for storing sensor calibration coefficients and device-specific configuration.
How many I/O pins support capacitive touch sensing on STM32L151C8T6TR?
The STM32L151C8T6TR supports up to 20 capacitive sensing channels using its CTSU peripheral. These channels map to specific GPIOs (PA0–PA7, PB0–PB1, PC0–PC7, PD0–PD2) as defined in Section 3.14 of the datasheet, and support touchkey, linear slider, and rotary wheel topologies without external components.
STM32L151C8T6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- 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:
- 64KB (64K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 4K x 8
- RAM Size:
- 10K 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:
STM32L151C8T6TR FAQ
1.How can I place an order for STM32L151C8T6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151C8T6TR 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 STM32L151C8T6TR reliable?
The price and inventory of STM32L151C8T6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151C8T6TR is usually 5 days.
3.What payment methods are accepted for STM32L151C8T6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151C8T6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151C8T6TR?
STM32L151C8T6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151C8T6TR 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 STM32L151C8T6TR?
For technical support, including STM32L151C8T6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151C8T6TR requirements.
6.How does Aetrix verify that STM32L151C8T6TR is sourced from the original manufacturer or authorized distributors?
All STM32L151C8T6TR 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 STM32L151C8T6TR meets industry standards.
7.What is the process for return or replacement of STM32L151C8T6TR?
All STM32L151C8T6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151C8T6TR, 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 STM32L151C8T6TR part is unused and in its original packaging.
Return procedure for STM32L151C8T6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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