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STMicroelectronics STM32L151RDT7
- Part No.:
- STM32L151RDT7
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L151RDT7.pdf
- Description:
- IC MCU 32BIT 384KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,182
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Product details
Overview
STM32L151RDT7 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 384 KB Flash, 48 KB SRAM, 12 KB EEPROM with ECC, USB 2.0 interface, and 12-bit ADC (1 Msps, up to 40 channels) - deployed in battery-powered medical sensors, portable industrial loggers, and smart utility meters requiring sub-µA standby operation.
For engineers reviewing the STM32L151RDT7 datasheet, STM32L151RDT7 pinout, STM32L151RDT7 application, or STM32L151RDT7 equivalent, key selection criteria include verified 305 nA Standby current, 1.35 µA Stop mode + RTC, 102 5V-tolerant I/Os, and dual 12-bit DAC outputs with buffers - all validated for operation across -40°C to 105°C.
Technical Context
This MCU implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with hardware-accelerated wakeup from Stop mode in 8 µs. Its memory subsystem includes dual-bank Flash enabling Read-While-Write (RWW), ECC-protected SRAM and EEPROM, and FSMC supporting SRAM/PSRAM/NOR interfaces.
The analog subsystem integrates three operational amplifiers, two ultra-low-power comparators with window mode and wakeup capability, a temperature sensor, and VREFINT reference - all functional down to 1.8 V supply. Clock architecture combines HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), MSI (65 kHz–4.2 MHz), and PLL for USB (48 MHz).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm® Cortex®-M3, 32-bit, up to 32 MHz - delivers 33.3 DMIPS peak performance with MPU for secure memory partitioning. |
| Flash Memory | 384 KB with ECC and RWW capability - enables firmware updates without halting real-time operations. |
| SRAM | 48 KB - sufficient for complex RTOS stacks and sensor fusion algorithms in constrained environments. |
| EEPROM | 12 KB true EEPROM with ECC - retains calibration data and device configuration across 400k write cycles. |
| Low-Power Standby | 305 nA (3 wakeup pins) - extends coin-cell battery life to >10 years in always-on monitoring applications. |
| ADC | 12-bit, 1 Msps, up to 40 channels - supports simultaneous sampling of multi-sensor arrays with internal temperature sensor and VREFINT. |
| DAC | 2-channel, 12-bit with output buffers - generates precise analog control signals (e.g., bias voltages, sensor excitation) without external op-amps. |
| I/O Count | 102 pins, 5V tolerant - simplifies interface to legacy peripherals and reduces level-shifter count in mixed-voltage systems. |
Pinout & Package
LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad - optimized for compact PCB layouts and thermal dissipation in sealed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Core & I/O power supply | 1.65–3.6 V input; powers CPU, memories, and all digital peripherals - requires local 100 nF decoupling. |
| VSS | Ground reference | Digital ground plane connection; must be low-impedance and tied to analog ground at single point. |
| NRST | Active-low reset input | Asynchronous reset trigger; accepts 1.65–3.6 V logic levels and supports external pull-up for reliable startup. |
| PA0–PA15 | General-purpose I/O bank A | 16 configurable pins with interrupt capability; support alternate functions including USART2_TX, ADC1_IN0, TIM2_CH1. |
| USB_DM / USB_DP | USB 2.0 full-speed differential pair | Integrated transceiver with internal 1.5 kΩ pull-up on DP - eliminates need for external USB PHY or pull-up resistor. |
| PC13–PC15 | Low-power oscillator inputs | Connect to 32.768 kHz crystal for RTC operation; PC14/PC15 support calibration via RCC_BDCR register. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power modes | 305 nA Standby, 0.475 µA Stop, 11 µA Low-power Run - enables decade-long battery life in intermittent sensing nodes. |
| Memory protection unit (MPU) | Configurable region-based access control - isolates RTOS kernel, application tasks, and peripheral drivers for safety-critical use. |
| Capacitive touch sensing | Up to 34 channels with hardware-accelerated acquisition - supports slider, wheel, and proximity detection without CPU overhead. |
| Embedded CRC unit | Hardware-accelerated 32-bit CRC calculation - validates firmware integrity and communication payloads in real time. |
| Programmable voltage detector (PVD) | 7-level threshold selection (2.2–2.9 V) - triggers interrupt or reset before brownout, protecting EEPROM writes and state retention. |
| 96-bit unique ID | Factory-programmed serial number - enables secure device authentication and license binding in cloud-connected endpoints. |
Applications
| Portable Medical Sensor | Smart Utility Meter |
|---|---|
Use Scenario: Wearable ECG patch continuously acquiring biopotential signals with onboard signal conditioning and BLE-ready data buffering. IC Role / Device Role / Timing Role: Primary controller managing analog front-end (op-amps, ADC), real-time filtering, low-power RTC timestamping, and USB mass storage for firmware updates. Use Value: 12-bit ADC with 1 Msps and integrated op-amps eliminate external signal chain components; 305 nA Standby extends CR2032 battery life beyond 36 months. |
Use Scenario: Battery-backed electricity meter logging voltage, current, and energy consumption every 15 minutes, transmitting via NB-IoT during scheduled windows. IC Role / Device Role / Timing Role: System-on-chip handling metrology ADC sampling, EEPROM-based tariff storage, RTC-driven wakeups, and UART-based modem control. Use Value: 12 KB EEPROM with ECC ensures 10+ years of tamper-resistant billing history; 1.35 µA Stop+RTC enables precise 15-minute intervals with minimal battery drain. |
| Industrial Wireless Node | Asset Tracking Beacon |
Use Scenario: Ruggedized vibration sensor node mounted on rotating machinery, performing FFT analysis locally and transmitting alerts only on anomaly detection. IC Role / Device Role / Timing Role: Real-time processor executing sensor fusion algorithms, managing SPI-connected MEMS accelerometer, and controlling low-power RF transceiver timing. Use Value: Dual-bank Flash allows over-the-air firmware update while maintaining active monitoring; 102 5V-tolerant I/Os interface directly to legacy industrial sensors without level shifters. |
Use Scenario: GPS-denied indoor asset tracker using BLE beaconing and capacitive touch wake-on-proximity in warehouse logistics. IC Role / Device Role / Timing Role: Ultra-low-power coordinator managing capacitive touch wakeup, BLE advertising stack, and backup register-retained last-known location. Use Value: 34-channel capacitive sensing detects proximity without mechanical switches; 10 nA I/O leakage prevents parasitic discharge of supercapacitor backup power source. |
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), lower standby (150 nA), but no true EEPROM - uses emulated EEPROM in Flash. | Better suited for sensor fusion with floating-point math; lacks dedicated EEPROM for high-write-cycle calibration storage. | Select when DSP capability and lower standby outweigh EEPROM endurance requirements. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1.4 µA Stop mode, integrated DC-DC converter, but no USB interface and only 32 KB RAM. | Optimized for RF-heavy applications (e.g., Sub-GHz + BLE); lacks USB for direct PC connectivity or firmware drag-and-drop. | Select for battery-operated RF nodes where USB is unnecessary and DC-DC efficiency is critical. |
Compared with STM32L151RDT7, the STM32L431RCT6 trades EEPROM reliability for higher compute throughput and lower standby, while the EFM32PG12B500F1024GL125 sacrifices USB and memory size for superior RF integration and DC-DC efficiency - making STM32L151RDT7 optimal for USB-enabled, EEPROM-dependent, cost-sensitive industrial sensors.
Availability
STM32L151RDT7 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, and industrial wireless nodes requiring stable component supply across extended product lifecycles.
Supply support for STM32L151RDT7 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 analog integration, and industrial-grade reliability - with design focus on metering, wearables, and environmental monitoring.
FAQ
What is the maximum operating temperature range for STM32L151RDT7?
The STM32L151RDT7 is qualified for industrial operation from -40°C to +105°C ambient temperature, with all electrical specifications guaranteed across this range per DS8576 Rev 13 Section 6.3.1. This includes full functionality of ADC, DAC, op-amps, and RTC with calibration.
Does STM32L151RDT7 support USB device mode without external components?
Yes - it integrates a full-speed USB 2.0 transceiver with internal 1.5 kΩ pull-up resistor on USB_DP, enabling USB device mode (e.g., CDC, HID, MSC) using only standard USB Type-A cable and host-side drivers. No external PHY or pull-up resistor is required.
How many independent 12-bit DAC channels does STM32L151RDT7 provide?
The STM32L151RDT7 provides two independent 12-bit DAC channels (DAC1 and DAC2), each with built-in output buffer, configurable trigger sources (timers, software), and noise suppression modes - confirmed in Section 3.12 of DS8576 Rev 13.
Is the 12 KB EEPROM truly persistent and ECC-protected?
Yes - the 12 KB EEPROM is implemented as dedicated silicon memory (not emulated in Flash), supports 400,000 write/erase cycles and 20-year data retention at 85°C, and includes hardware ECC for single-bit correction and double-bit detection per DS8576 Rev 13 Table 35 and Section 3.7.
STM32L151RDT7 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L151RDT7 FAQ
1.How can I place an order for STM32L151RDT7 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151RDT7 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 STM32L151RDT7 reliable?
The price and inventory of STM32L151RDT7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151RDT7 is usually 5 days.
3.What payment methods are accepted for STM32L151RDT7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151RDT7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151RDT7?
STM32L151RDT7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151RDT7 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 STM32L151RDT7?
For technical support, including STM32L151RDT7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151RDT7 requirements.
6.How does Aetrix verify that STM32L151RDT7 is sourced from the original manufacturer or authorized distributors?
All STM32L151RDT7 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 STM32L151RDT7 meets industry standards.
7.What is the process for return or replacement of STM32L151RDT7?
All STM32L151RDT7 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151RDT7, 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 STM32L151RDT7 part is unused and in its original packaging.
Return procedure for STM32L151RDT7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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