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STMicroelectronics STM32L151RDT6
- Part No.:
- STM32L151RDT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L151RDT6.pdf
- Description:
- IC MCU 32BIT 384KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:782
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Product details
Overview
STM32L151RDT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller with 384 KB Flash, 48 KB SRAM, 12 KB EEPROM, USB 2.0 interface, and 12-bit ADC (1 Msps, up to 40 channels) - deployed in battery-powered medical sensors and portable industrial data loggers requiring sub-µA standby operation.
For engineers reviewing the STM32L151RDT6 datasheet, STM32L151RDT6 pinout, STM32L151RDT6 application, or STM32L151RDT6 equivalent, key selection criteria include verified 305 nA Standby current, 1.35 µA Stop mode + RTC, 11 µA Low-power run mode, and LQFP64 package compatibility with legacy PCB footprints.
Technical Context
The device integrates a 32-bit Arm Cortex-M3 core running at up to 32 MHz with MPU, dynamic voltage scaling, and five low-power modes (Run, Sleep, Low-power Run, Stop, Standby). It supports dual-bank Flash for Read-While-Write (RWW) and ECC protection across memory subsystems.
Analog subsystem includes three operational amplifiers, two 12-bit DACs with output buffers, two ultra-low-power comparators with window mode and wakeup capability, and a temperature sensor - all functional down to 1.8 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M3, 32-bit, up to 32 MHz - enables deterministic real-time control with 33.3 DMIPS performance |
| Flash Memory | 384 KB with ECC and dual-bank architecture - supports RWW for firmware updates without halting execution |
| SRAM | 48 KB - sufficient for RTOS stacks, sensor fusion buffers, and USB endpoint descriptors |
| EEPROM | 12 KB true EEPROM with ECC - retains calibration data and configuration across 400k erase/write cycles |
| Standby Current | 305 nA (3 wakeup pins) - extends coin-cell battery life to >10 years in always-on sensing nodes |
| ADC | 12-bit, 1 Msps, up to 40 channels - captures multi-sensor analog inputs (voltage, temp, pressure) with single-cycle sampling |
| DAC | 2× 12-bit with output buffers - generates precise analog control signals for actuator drivers or reference voltages |
| USB Interface | Full-speed USB 2.0 with internal 48 MHz PLL - enables direct PC connectivity without external crystal or PHY |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with 51 general-purpose I/Os (41 5V-tolerant), 16 external interrupt lines, and dedicated pins for USB D+/D−, RTC oscillator (LSE), and system reset (NRST).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core, SRAM, and digital peripherals; requires local 100 nF decoupling |
| VSS | Ground reference | Common return path for analog/digital domains; separate VSSA recommended for ADC/DAC stability |
| PA0–PA15 | General-purpose I/O bank A | Configurable as GPIO, ADC1_IN0–IN15, TIM2/3/5 channels, or USART2_TX/RX - mappable to 16 EXTI lines |
| PC13–PC15 | Low-power RTC domain I/O | Drive 32.768 kHz LSE crystal or serve as tamper/wakeup pins in Standby mode |
| PA11/PA12 | USB D−/D+ | Dedicated full-speed USB transceiver pins with internal pull-ups; no external termination required |
| NRST | Active-low reset input | Asynchronous reset with Schmitt trigger; accepts 1–20 ms pulse width per specification |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 305 nA with 3 wakeup pins - enables decade-long battery life in maintenance-free IoT endpoints |
| Embedded EEPROM | 12 KB with ECC and 400k endurance - eliminates need for external serial EEPROM in field-upgradable devices |
| Capacitive touch sensing | Up to 34 channels with hardware-accelerated acquisition - supports slider, wheel, and proximity detection without CPU load |
| Memory protection unit (MPU) | Configurable regions with privilege/access control - enforces secure partitioning between bootloader and application firmware |
| Pre-programmed USB/USART bootloader | Factory-loaded ROM code - allows firmware updates over USB or UART without debug interface |
| 96-bit unique ID | Factory-programmed silicon serial number - enables secure device authentication and license binding |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG and SpO₂ monitoring using dry electrodes and optical sensors powered by CR2032 coin cell. IC Role / Device Role / Timing Role: Main controller managing analog front-end (ADC/DAC/op-amps), real-time signal processing, and Bluetooth LE data transmission via USART. Use Value: 1.15 µA Standby + RTC enables accurate time-stamped logging during sleep intervals; 12 KB EEPROM stores patient calibration profiles across power cycles. | Use Scenario: Battery-backed electricity meter with pulse counting, tariff switching, and tamper detection over 15-year field life. IC Role / Device Role / Timing Role: System-on-chip handling metrology ADC sampling, LCD display driving, RTC-based billing intervals, and secure firmware updates via isolated UART. Use Value: 0.475 µA Stop mode preserves RTC and backup registers while disabling CPU; PC13–PC15 pins detect enclosure opening via tamper interrupt. |
| Industrial Wireless Sensor Node | Portable Gas Detector |
Use Scenario: LoRaWAN-enabled node measuring temperature, humidity, and CO₂ in HVAC ducts with 2-year battery life. IC Role / Device Role / Timing Role: Central MCU acquiring sensor data via I²C/SPI, performing compensation algorithms, and scheduling low-duty-cycle radio transmissions. Use Value: 11 µA Low-power run mode sustains active computation while maintaining sub-10 µA average current; DMA-driven ADC reduces CPU wakeups. | Use Scenario: Handheld combustible gas detector with electrochemical sensors, audible alarm, and LCD readout operating on AA batteries. IC Role / Device Role / Timing Role: Analog-intensive controller interfacing with 3× op-amps for sensor signal conditioning, 2× DACs for bias voltage generation, and comparator-based fault detection. Use Value: Ultra-low-power comparators (290 nA typical) enable continuous gas threshold monitoring in Stop mode; 10 nA I/O leakage prevents false triggers in high-impedance sensor paths. |
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 |
|---|---|---|---|
| STM32L431RCT6 | Higher performance (80 MHz Cortex-M4F), 256 KB Flash, no embedded EEPROM, 1.1 µA Stop mode | Better suited for sensor fusion with floating-point math; lacks EEPROM for non-volatile config storage | Select when FPU and higher clock speed justify trade-off of external EEPROM or FRAM |
| STM32L071RBT6 | Lower cost Cortex-M0+, 128 KB Flash, 20 KB RAM, 1.8 µA Stop mode, no USB | Targeted at simpler BLE beacons or basic timers where USB and LCD are unnecessary | Choose for cost-sensitive designs without USB or high-resolution analog requirements |
Compared with STM32L151RDT6, the STM32L431RCT6 delivers 2.5× CPU throughput but requires external non-volatile memory for configuration retention, while the STM32L071RBT6 reduces BOM cost and power in USB-free applications at the expense of ADC channel count and DAC precision.
Availability
STM32L151RDT6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable gas detectors requiring stable component supply across long-lifecycle deployments.
Supply support for STM32L151RDT6 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 ICs, sensors, and automotive-grade components since 1987.
The STM32L1 series targets ultra-low-power embedded applications - optimized for battery-operated devices demanding multi-year runtime, robust analog integration, and secure firmware update capabilities.
FAQ
What is the maximum operating frequency of the STM32L151RDT6?
The STM32L151RDT6 operates at up to 32 MHz using its internal 16 MHz RC oscillator with PLL multiplication or external crystal sources. Frequency scaling is dynamically managed by the voltage regulator to maintain ultra-low-power operation across voltage ranges from 1.65 V to 3.6 V, with guaranteed performance at all specified supply levels.
Does the STM32L151RDT6 support USB without an external crystal?
Yes - the device integrates a 48 MHz PLL fed by its internal 16 MHz HSI RC oscillator, enabling full-speed USB 2.0 communication without requiring an external crystal. This simplifies BOM and layout while maintaining USB compliance, though external 48 MHz crystal support remains available for jitter-sensitive applications.
How many ADC channels are available, and what is their resolution and speed?
The STM32L151RDT6 features a single 12-bit ADC with up to 40 input channels (including internal temperature sensor and VREFINT), capable of 1 million samples per second. Conversion accuracy is ±2 LSB INL/DNL over temperature, with programmable sampling times and hardware oversampling support for enhanced effective resolution.
Is the 12 KB EEPROM truly embedded and wear-levelled?
Yes - the 12 KB EEPROM is implemented as true on-die flash memory with built-in ECC and hardware wear leveling managed by the embedded Flash programming logic. It guarantees 400,000 erase/write cycles and 20-year data retention at 55°C, eliminating need for external EEPROM or software wear-leveling algorithms.
STM32L151RDT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- Series:
- STM32L1
- Packaging:
- Tray
- 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:
- 51
- Program Memory Size:
- 384KB (384K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 12K x 8
- RAM Size:
- 48K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.8V ~ 3.6V
- Data Converters:
- A/D 21x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L151RDT6 FAQ
1.How can I place an order for STM32L151RDT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151RDT6 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 STM32L151RDT6 reliable?
The price and inventory of STM32L151RDT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151RDT6 is usually 5 days.
3.What payment methods are accepted for STM32L151RDT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151RDT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151RDT6?
STM32L151RDT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151RDT6 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 STM32L151RDT6?
For technical support, including STM32L151RDT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151RDT6 requirements.
6.How does Aetrix verify that STM32L151RDT6 is sourced from the original manufacturer or authorized distributors?
All STM32L151RDT6 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 STM32L151RDT6 meets industry standards.
7.What is the process for return or replacement of STM32L151RDT6?
All STM32L151RDT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151RDT6, 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 STM32L151RDT6 part is unused and in its original packaging.
Return procedure for STM32L151RDT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L151RDT6 Tags
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