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STMicroelectronics STM32L151RET6TR
- Part No.:
- STM32L151RET6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L151RET6TR.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,023
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Product details
Overview
STM32L151RET6TR from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 80 KB SRAM, 16 KB EEPROM with ECC, 12-bit ADC (1 Msps, up to 40 channels), and dual 12-bit DACs with output buffers. It operates from 1.65 V to 3.6 V across –40 °C to +105 °C and delivers 195 µA/MHz in Run mode - deployed in battery-powered industrial sensors and portable medical monitors.
For engineers reviewing the STM32L151RET6TR datasheet, STM32L151RET6TR pinout, STM32L151RET6TR application, or STM32L151RET6TR equivalent, key selection criteria include standby current (290 nA), RTC-enabled Stop mode (1.11 µA), 102 I/Os (5V tolerant), USB 2.0 interface with internal 48 MHz PLL, and LCD driver exclusion per device variant (STM32L151xE lacks LCD).
Technical Context
This MCU implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby) with hardware-accelerated wake-up from Stop mode in 8 µs. Its memory subsystem includes dual-bank Flash enabling Read-While-Write (RWW) and ECC protection for both Flash and EEPROM.
The analog subsystem integrates two operational amplifiers, two ultra-low-power comparators with window mode and wake-up capability, a temperature sensor, and VREFINT reference - all functional down to 1.8 V supply. Clock architecture supports four internal oscillators (HSI, LSI, MSI, LSE) plus external crystal options and a USB-capable PLL.
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 MPU for memory isolation. |
| Flash Memory | 512 KB with ECC and RWW capability - supports firmware updates without halting execution. |
| SRAM | 80 KB - sufficient for complex RTOS stacks and data buffering in edge-sensing applications. |
| EEPROM | 16 KB true EEPROM with ECC - retains calibration data and configuration across power cycles without external NV memory. |
| ADC | 12-bit, 1 Msps, up to 40 channels - captures high-fidelity sensor signals (e.g., thermistors, strain gauges) with integrated oversampling. |
| DAC | 2× 12-bit with output buffers - generates precise analog waveforms or bias voltages for sensor excitation or actuator control. |
| Low-Power Standby | 290 nA (3 wakeup pins) - extends shelf life and operational runtime in energy-harvesting or coin-cell-powered devices. |
| USB Interface | Full-speed USB 2.0 with internal 48 MHz PLL - eliminates need for external clock source in USB-connected peripherals. |
Pinout & Package
LQFP64 (10 × 10 mm) package with 64-pin quad flat lead frame; RoHS-compliant, moisture sensitivity level 3 (MSL3), rated for industrial temperature range (–40 °C to +105 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply (1.65–3.6 V) | Supplies core and I/O domains; requires local decoupling for noise-sensitive analog operation. |
| VSS | Ground reference | Dedicated analog/digital ground pins enable separation of noisy digital return paths from precision analog circuits. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE7 | General-purpose I/Os | 102 total I/Os; 5V-tolerant on most ports - simplifies interface with legacy logic and sensors. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion. |
| BOOT0 | Boot mode selection | Configures boot source (system memory, embedded Flash, or SRAM); sampled at reset only. |
| USB_DP / USB_DM | USB differential data lines | Integrated full-speed transceiver; no external PHY required - reduces BOM count and PCB area. |
| VREF+ | Analog reference positive input | Accepts external reference or connects to internal VREFINT for stable ADC/DAC scaling. |
| VBAT | Backup power supply | Connects to coin cell or supercapacitor to retain RTC and 128-byte backup registers during main power loss. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 290 nA with 3 wakeup pins - enables >10-year battery life in always-on environmental monitors. |
| Memory ECC protection | Hardware-implemented ECC on Flash and EEPROM - prevents silent data corruption in safety-critical logging. |
| Capacitive touch sensing | Up to 34 channels with built-in charge transfer circuitry - eliminates external touch controller in HMI designs. |
| Programmable voltage detector | Configurable threshold (4 levels) with interrupt generation - enables graceful shutdown before brownout-induced reset. |
| Dual operational amplifiers | Unity-gain stable, rail-to-rail I/O, 1.3 MHz GBW - condition sensor signals (e.g., bridge outputs) before ADC sampling. |
| Temperature sensor | Calibrated ±1.5 °C accuracy over –40 °C to +105 °C - provides system thermal monitoring without external IC. |
Applications
| Industrial Sensor Node | Portable Medical Monitor |
|---|---|
Use Scenario: Wireless temperature/humidity node powered by AA batteries with LoRaWAN backhaul. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, signal conditioning, low-power scheduling, and USB/UART firmware updates. Use Value: 11 µA Low-power run mode and 560 nA Stop mode extend battery life to 5+ years; integrated op-amps reduce external component count. |
Use Scenario: Handheld ECG recorder with OLED display, rechargeable Li-ion battery, and USB-C charging/data export. IC Role / Device Role / Timing Role: Central processor handling analog front-end digitization, real-time QRS detection, and USB mass storage emulation. Use Value: Dual 12-bit DACs generate precise pacing waveforms; 12-bit ADC achieves ≥70 dB SNR for clinical-grade signal fidelity. |
| Smart Utility Meter | Asset Tracking Beacon |
Use Scenario: Battery-operated water/gas meter with ultrasonic flow sensing and NB-IoT connectivity. IC Role / Device Role / Timing Role: Primary MCU executing metrology algorithms, RTC-based billing intervals, and secure firmware updates via encrypted OTA. Use Value: 16 KB EEPROM stores tamper logs and calibration coefficients with ECC; 1.11 µA Stop+RTC enables 15-year meter lifetime. |
Use Scenario: GPS-denied indoor asset tag using BLE beaconing, accelerometer-based motion detection, and ambient light sensing. IC Role / Device Role / Timing Role: System-on-chip managing multi-sensor fusion, low-duty-cycle BLE advertising, and wake-on-motion event handling. Use Value: 34-channel capacitive sensing detects proximity/touch without mechanical buttons; 10 nA I/O leakage prevents parasitic discharge in deep sleep. |
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 active current (80 µA/MHz), but no EEPROM and reduced I/O count (51 vs. 102) | Better suited for floating-point math (e.g., FFT-based vibration analysis), less ideal for EEPROM-dependent calibration storage | Select when computational throughput outweighs nonvolatile memory requirements and I/O density. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 40 MHz, 1024 KB Flash, 256 KB RAM, no EEPROM, 20 nA deep sleep | Superior deep-sleep current but lacks integrated USB and DAC; requires external USB PHY and DAC for equivalent functionality | Prefer for extreme energy-constrained applications where USB/DAC are implemented externally or omitted. |
Compared with STM32L151RET6TR, STM32L431RCT6 trades EEPROM and I/O count for higher CPU performance and lower active power, while EFM32PG12B500F1024GL125 achieves lower deep-sleep current but adds design complexity through external peripheral dependencies.
Availability
STM32L151RET6TR is available at Aetrix Electronics and suitable for battery-powered industrial sensors, portable medical monitors, smart utility meters, and asset tracking beacons requiring stable component supply across extended product lifecycles.
Supply support for STM32L151RET6TR 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.
The STM32L1 series targets ultra-low-power embedded applications demanding long battery life, robust analog integration, and industrial-grade reliability - optimized for sensor nodes, wearables, and metering systems.
FAQ
Does STM32L151RET6TR include an integrated LCD controller?
No. The STM32L151RET6TR belongs to the STM32L151xE subfamily, which explicitly excludes the LCD controller present in STM32L152xE devices. This omission reduces die size and cost for applications not requiring segmented display driving.
What is the maximum operating frequency with guaranteed timing at 1.8 V supply?
At 1.8 V, the maximum guaranteed CPU frequency is 16 MHz, enabled by Dynamic Voltage Scaling (DVS) Level 2. This ensures reliable operation under low-voltage battery conditions while maintaining real-time responsiveness.
How many independent 16-bit timers with PWM capability does this MCU support?
It supports six 16-bit general-purpose timers (TIM2–TIM5, TIM9–TIM11), each with up to four independent capture/compare channels usable for PWM generation, input capture, or quadrature decoding - totaling 24 configurable PWM outputs.
Is the 16 KB EEPROM accessible concurrently with code execution from Flash?
Yes. The EEPROM is mapped into the memory space and supports read/write operations during program execution. Its ECC protection and endurance rating (up to 400k write/erase cycles) make it suitable for frequent parameter updates without requiring external memory.
STM32L151RET6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-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:
- 51
- Program Memory Size:
- 512KB (512K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 16K x 8
- RAM Size:
- 80K 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:
STM32L151RET6TR FAQ
1.How can I place an order for STM32L151RET6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151RET6TR 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 STM32L151RET6TR reliable?
The price and inventory of STM32L151RET6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151RET6TR is usually 5 days.
3.What payment methods are accepted for STM32L151RET6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151RET6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151RET6TR?
STM32L151RET6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151RET6TR 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 STM32L151RET6TR?
For technical support, including STM32L151RET6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151RET6TR requirements.
6.How does Aetrix verify that STM32L151RET6TR is sourced from the original manufacturer or authorized distributors?
All STM32L151RET6TR 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 STM32L151RET6TR meets industry standards.
7.What is the process for return or replacement of STM32L151RET6TR?
All STM32L151RET6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151RET6TR, 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 STM32L151RET6TR part is unused and in its original packaging.
Return procedure for STM32L151RET6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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