My Inquiry
My Account
STMicroelectronics STM32L151RET6
- Part No.:
- STM32L151RET6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L151RET6.pdf
- Description:
- IC MCU 32BIT 512KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,736
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32L151RET6 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 - deployed in battery-powered medical sensors, portable industrial loggers, and smart utility meters requiring sub-µA standby operation.
For engineers reviewing the STM32L151RET6 datasheet, STM32L151RET6 pinout, STM32L151RET6 application, or STM32L151RET6 equivalent, key selection criteria include verified 290 nA Standby current, RWW-capable dual-bank Flash architecture, 102 5V-tolerant I/Os, and integrated USB 2.0 PHY with internal 48 MHz PLL - all validated for extended-life embedded designs operating from 1.65 V to 3.6 V.
Technical Context
The STM32L151RET6 implements dynamic voltage scaling across five low-power modes (Run, Sleep, Low-power Run, Low-power Sleep, Stop, Standby), enabling precise trade-offs between performance (up to 32 MHz) and current consumption (as low as 290 nA). Its memory protection unit (MPU) enforces privilege-level access control for secure firmware execution.
It integrates a full suite of analog peripherals including two operational amplifiers, two ultra-low-power comparators with window mode and wake-up capability, and a temperature sensor with factory calibration - all functional down to 1.8 V supply, supporting precision sensing without external signal conditioning.
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 environments. |
| Memory | 512 KB Flash (dual-bank, ECC, RWW), 80 KB SRAM, 16 KB EEPROM (ECC) - enables safe firmware updates and nonvolatile data logging without external memory. |
| Low-Power Modes | 290 nA Standby (3 wakeup pins), 560 nA Stop (16 wakeup lines), 11 µA Low-power Run - extends battery life to years in intermittent-sensing applications. |
| Analog Peripherals | 12-bit ADC (1 Msps, 40 channels), 2×12-bit DACs with buffers, 2× op-amps, 2× comparators - supports closed-loop analog control and sensor signal chain integration. |
| Communication | 1× USB 2.0 FS (internal 48 MHz PLL), 5× USART, up to 8× SPI (incl. 2× I2S), 2× I2C - provides flexible connectivity for host interfaces, wireless modules, and sensor networks. |
| I/O & Packaging | 102 5V-tolerant GPIOs, LQFP64 package (10 × 10 mm) - simplifies PCB layout and ensures robust interfacing with legacy 5V logic and industrial peripherals. |
Pinout & Package
LQFP64 package (10 × 10 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant, industrial temperature range (–40 °C to +105 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD for digital/analog core (1.65–3.6 V), VSS reference - requires local decoupling per ST AN4229 guidelines. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 102 total GPIOs; 102 are 5V-tolerant, all mappable to 16 external interrupt vectors - enables flexible peripheral routing and hardware debouncing. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; supports external reset button or supervisor IC assertion - critical for fail-safe recovery in unattended systems. |
| USB_DP / USB_DM | USB 2.0 Full-Speed differential pair | Integrated transceiver with internal 1.5 kΩ pull-up on DP - eliminates external USB resistor network and reduces BOM count. |
| OSC_IN / OSC_OUT | External crystal oscillator inputs | Supports 1–24 MHz crystals; paired with internal 32 kHz RTC oscillator - enables high-accuracy timekeeping and clock redundancy. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power standby | 290 nA with 3 wakeup pins active - enables decade-scale battery operation in IoT endpoint nodes using coin cells. |
| RWW Flash architecture | Dual 256 KB banks allow concurrent code execution and firmware update - eliminates system downtime during OTA upgrades. |
| Capacitive touch sensing | Up to 34 channels with hardware-accelerated acquisition - replaces mechanical buttons in medical handhelds and industrial HMI without CPU overhead. |
| Embedded CRC unit | Hardware-accelerated checksum generation for Flash, RAM, and DMA transfers - ensures data integrity in safety-critical logging applications. |
| 96-bit unique ID | Fuse-programmed device serial number - enables secure device authentication and cryptographic key binding in connected devices. |
Applications
| Portable ECG Monitor | Smart Water Meter |
|---|---|
Use Scenario: Continuous 3-lead ECG acquisition with Bluetooth LE telemetry and rechargeable Li-ion power management. IC Role / Device Role / Timing Role: Central controller managing analog front-end (ADC, op-amps), real-time signal processing, USB/USART firmware updates, and ultra-low-power sleep scheduling. Use Value: 1.4 µA Stop+RTC mode preserves timekeeping while minimizing quiescent drain; dual DACs generate precise calibration signals for analog path validation. |
Use Scenario: Ultrasonic flow measurement with pulse counting, LCD display, tamper detection, and NB-IoT backhaul via UART. IC Role / Device Role / Timing Role: System-on-chip integrating metrology engine (ADC, timers), human interface (LCD, capacitive keys), and secure communication stack. Use Value: 16 KB EEPROM stores meter calibration constants with ECC protection; 102 5V-tolerant I/Os interface directly with legacy pulse-output sensors and solenoid drivers. |
| Wireless Sensor Node | Industrial Temperature Logger |
Use Scenario: Battery-powered environmental node measuring temperature, humidity, and ambient light; transmitting data hourly via LoRaWAN. IC Role / Device Role / Timing Role: Power-aware coordinator sampling sensors, managing RF module power states, and executing AES-128 encryption before transmission. Use Value: 8 µs wakeup time from Stop mode minimizes latency in event-triggered sampling; internal temperature sensor provides self-calibration reference. |
Use Scenario: Intrinsically safe, explosion-proof logger recording thermocouple and RTD readings in oil/gas refineries over 10-year deployments. IC Role / Device Role / Timing Role: Isolated data acquisition hub with cold-junction compensation, backup register retention, and watchdog-secured firmware execution. Use Value: –40 °C to +105 °C operating range and 10 nA I/O leakage ensure reliability in extreme ambient conditions; 128-byte backup registers retain timestamps across power cycles. |
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 |
|---|---|---|---|
| STM32L431RCT6 | Higher performance (80 MHz Cortex-M4F), 256 KB Flash, no EEPROM, lower standby current (180 nA), no LCD driver | Better suited for sensor fusion with floating-point math; lacks EEPROM-based parameter storage for field calibration | Select when DSP capability and lower standby outweigh EEPROM dependency and cost sensitivity. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 1024 KB Flash, 256 KB RAM, 32 KB EEPROM, 1.6 µA Stop mode, no USB | Superior memory density and analog integration (12-bit ADC + PGA), but requires external USB transceiver | Prefer for high-channel-count data loggers needing >512 KB program space and integrated programmable gain amplification. |
Compared with STM32L151RET6, the STM32L431RCT6 trades EEPROM and USB integration for higher compute throughput and lower standby, while the EFM32PG12B500F1024GL125 offers larger memory and richer analog resources at the cost of USB omission and higher BOM complexity.
Availability
STM32L151RET6 is available at Aetrix Electronics and suitable for portable medical devices, smart utility meters, and industrial data loggers requiring stable component supply across multi-year production cycles.
Supply support for STM32L151RET6 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog components for industrial, automotive, and consumer markets.
The STM32L1 series targets ultra-low-power embedded applications demanding long battery life, robust analog integration, and certified security features - optimized for wearables, metering, and remote sensing.
FAQ
What is the maximum operating frequency and corresponding supply voltage range?
The STM32L151RET6 operates up to 32 MHz across its full 1.65 V to 3.6 V supply range, with dynamic voltage scaling enabling reduced core voltage at lower frequencies to minimize active power. At 32 MHz, typical current draw is 195 µA/MHz in Run mode with code executing from Flash.
Does this MCU support hardware encryption or secure boot features?
The STM32L151RET6 does not include dedicated cryptographic accelerators or secure boot ROM. It relies on software-based AES libraries and external secure elements for encryption; secure firmware updates require custom implementation using its 96-bit unique ID and ECC-protected Flash/EEPROM.
How many I/O pins support external interrupt capability?
All 102 GPIOs are individually configurable for external interrupt generation and mapped across 16 independent external interrupt vectors (EXTI0–EXTI15), allowing simultaneous edge-triggered wake-up from any combination of pins in Stop or Standby mode.
Is the internal 32 kHz RTC oscillator calibrated, and what is its accuracy?
Yes, the internal 32 kHz LSE oscillator supports automatic calibration against the HSE or HSI clock sources, achieving ±500 ppm accuracy over –40 °C to +85 °C after calibration - sufficient for metering-grade timekeeping without external crystal.
STM32L151RET6 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:
- 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:
STM32L151RET6 FAQ
1.How can I place an order for STM32L151RET6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151RET6 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 STM32L151RET6 reliable?
The price and inventory of STM32L151RET6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151RET6 is usually 5 days.
3.What payment methods are accepted for STM32L151RET6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151RET6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151RET6?
STM32L151RET6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151RET6 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 STM32L151RET6?
For technical support, including STM32L151RET6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151RET6 requirements.
6.How does Aetrix verify that STM32L151RET6 is sourced from the original manufacturer or authorized distributors?
All STM32L151RET6 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 STM32L151RET6 meets industry standards.
7.What is the process for return or replacement of STM32L151RET6?
All STM32L151RET6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151RET6, 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 STM32L151RET6 part is unused and in its original packaging.
Return procedure for STM32L151RET6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L151RET6 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
