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STMicroelectronics STM32L151RDY6TR
- Part No.:
- STM32L151RDY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA, WLCSP
- Datasheet:
-
STM32L151RDY6TR.pdf
- Description:
- IC MCU 32BIT 384KB FLASH 64WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:4,962
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Product details
Overview
STM32L151RDY6TR 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). It operates from 1.65 V to 3.6 V across –40°C to +105°C and delivers 33.3 DMIPS at 32 MHz, targeting battery-powered industrial sensors and portable medical devices.
For engineers reviewing the STM32L151RDY6TR datasheet, STM32L151RDY6TR pinout, STM32L151RDY6TR application, or STM32L151RDY6TR equivalent, key selection criteria include standby current (305 nA), RTC-enabled Stop mode (1.15 µA), 102 5V-tolerant I/Os, and integrated LCD driver support (excluded in this variant), all critical for energy-constrained embedded designs.
Technical Context
This MCU implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with hardware-accelerated power state transitions. Its memory subsystem includes dual-bank Flash enabling Read-While-Write (RWW) and ECC-protected 12 KB true EEPROM for robust data logging.
The analog front-end integrates 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, 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 - enables deterministic real-time control with MPU for memory protection in safety-critical firmware. |
| Memory | 384 KB Flash (ECC, dual-bank RWW), 48 KB SRAM, 12 KB EEPROM (ECC) - supports firmware updates without data loss and secure parameter storage. |
| Power Consumption | 305 nA Standby (3 wakeup pins), 1.15 µA Stop + RTC - extends battery life to multi-year operation in metering and IoT edge nodes. |
| Analog Peripherals | 12-bit ADC (1 Msps, 40 ch), 2×12-bit DAC (buffered), 3×Op-Amps, 2×ULP Comparators - enables local signal acquisition, conditioning, and actuator control without external ICs. |
| Communication | 1×USB 2.0 (48 MHz PLL), 5×USART, 8×SPI (incl. 2×I2S), 2×I2C, 1×SDIO - provides flexible connectivity for host interfaces, wireless modules, displays, and SD cards. |
| I/O & Timing | 102 5V-tolerant GPIOs, 11 timers (incl. 1×32-bit, 6×16-bit PWM-capable), CRC unit, 96-bit unique ID - ensures robust peripheral control, secure device identification, and fast data integrity checks. |
Pinout & Package
LQFP64 (10 × 10 mm) package with exposed thermal pad; 64-pin quad flat pack suitable for automated assembly and thermal management in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual-supply domains: VDD powers core/peripherals; VSS provides reference return path for noise-sensitive analog sections. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 102 total GPIOs; 5V-tolerant on most ports - simplifies level-shifting in mixed-voltage systems. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion. |
| BOOT0 | Boot mode selection | High at power-on enables system memory bootloader via USART/USB - supports field firmware recovery without debugger. |
| USB_DP / USB_DM | Full-speed USB differential pair | Integrated transceiver with internal 1.5 kΩ pull-up on DP - eliminates external USB resistor network. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power architecture | 305 nA Standby, 0.475 µA Stop mode - enables coin-cell operation for >5 years in always-on sensor nodes. |
| Dual-bank Flash with ECC | 384 KB split into two 192 KB banks - allows seamless firmware update while executing from one bank. |
| True EEPROM with ECC | 12 KB nonvolatile storage - retains calibration data and device configuration across 100k write cycles with error correction. |
| Integrated analog subsystem | 3 Op-Amps + 2 DACs + 2 ULP Comparators - replaces 4–6 discrete analog components in sensor signal chains. |
| Hardware CRC engine | Polynomial-agnostic 32-bit CRC calculation - accelerates firmware image verification and communication packet integrity checks. |
Applications
| Smart Utility Meter | Portable ECG Monitor |
|---|---|
Use Scenario: Battery-powered electricity/water/gas meter with hourly data logging and RF transmission. IC Role / Device Role / Timing Role: Main controller managing metrology ADC sampling, EEPROM-based tariff storage, RTC-scheduled wakeups, and UART-to-PLC/RF module interface. Use Value: 305 nA Standby current enables >10-year battery life; 12 KB EEPROM stores 20+ years of billing history with ECC resilience. | Use Scenario: Handheld clinical-grade ECG device with real-time waveform display and Bluetooth upload. IC Role / Device Role / Timing Role: Signal acquisition hub synchronizing 12-bit ADC (lead II/III/aVR), driving OLED via SPI, buffering data in SRAM, and managing USB/Bluetooth HCI. Use Value: Integrated 3 Op-Amps condition raw electrode signals; 1.15 µA Stop+RTC enables instant-on resume after button press. |
| Industrial Wireless Sensor Node | Low-Power HVAC Controller |
Use Scenario: DIN-rail mounted temperature/humidity/CO₂ node transmitting via LoRaWAN every 15 minutes. IC Role / Device Role / Timing Role: System orchestrator reading I²C sensors, managing LoRa modem power states, performing dew-point calculations, and maintaining accurate time via LSE+RTC. Use Value: 8 µs wakeup from Stop mode minimizes active time; 5V-tolerant I/Os interface directly with legacy 5V sensor outputs. | Use Scenario: Wall-mounted thermostat controlling relays, reading NTC thermistors, and displaying status on segmented LCD. IC Role / Device Role / Timing Role: Real-time environmental manager running PID loop at 100 ms intervals, driving 4-digit LCD segments, and logging occupancy events to EEPROM. Use Value: On-chip LCD controller (up to 8×40) eliminates external display driver; 12-bit DAC calibrates analog sensor references. |
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 |
|---|---|---|---|
| STM32L431RCY6TR | Arm Cortex-M4F core, 213 µA/MHz Run, no EEPROM, 256 KB Flash, 64 KB SRAM | Better floating-point performance for FFT-based vibration analysis; lacks EEPROM for long-term calibration retention | Select when DSP-intensive algorithms outweigh nonvolatile data storage needs |
| STM32L071RBT6 | Cortex-M0+, 192 KB Flash, 20 KB RAM, no DAC, 12-bit ADC (1.14 Msps), 200 nA Standby | Lower cost and power for simpler sensor polling; missing Op-Amps and USB limits peripheral integration | Select for basic telemetry nodes where analog signal conditioning is handled externally |
Compared with STM32L151RDY6TR, the STM32L431RCY6TR trades EEPROM and analog integration for higher compute throughput, while the STM32L071RBT6 reduces BOM cost and standby current at the expense of DACs, Op-Amps, and USB - making the L151 optimal for mixed-signal, USB-connected, long-life applications.
Availability
STM32L151RDY6TR is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, industrial wireless sensor nodes, and low-power HVAC controllers requiring stable component supply across extended product lifecycles.
Supply support for STM32L151RDY6TR 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 semiconductors since 1987.
The STM32L1 series targets ultra-low-power embedded applications demanding multi-year battery life, robust data integrity, and rich analog integration - optimized for metering, wearables, and industrial IoT endpoints.
FAQ
What is the maximum operating frequency and corresponding power consumption in Run mode?
The STM32L151RDY6TR achieves 32 MHz CPU frequency with 230 µA/MHz typical current draw. At full speed, total active current is approximately 7.36 mA (230 µA × 32), verified under 3.3 V supply and code execution from Flash per DS8576 Rev 13 Table 17.
Does this part include an integrated LCD controller, and if not, which variants do?
No, the STM32L151RDY6TR (L151xD family) excludes the LCD controller per datasheet Section 2.1 and Table 10. Only STM32L152xD variants - such as STM32L152RCT6 - integrate the 8×40-segment LCD driver with contrast adjustment and blinking mode.
How many 5V-tolerant I/Os does the LQFP64 package support, and which pins are excluded?
The LQFP64 package provides 51 5V-tolerant I/Os. Pins excluded from 5V tolerance include BOOT0, NRST, VREF+, VREF-, VBAT, and all analog inputs (e.g., ADCx_INy, OPAMPx_VINP/VINM) - confirmed in DS8576 Rev 13 Section 6.3.14 and Table 50.
What clock sources are available for the RTC, and what accuracy can be achieved with calibration?
The RTC uses the 32.768 kHz LSE crystal oscillator, supported by hardware calibration adjusting the 32 kHz clock by ±487 ppm in 0.95 ppm steps. With factory-trimmed LSE and software calibration, typical RTC drift is <±2 ppm over –40°C to +85°C, as specified in DS8576 Rev 13 Section 6.3.25.
STM32L151RDY6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA, WLCSP
- 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:
- 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:
STM32L151RDY6TR FAQ
1.How can I place an order for STM32L151RDY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151RDY6TR 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 STM32L151RDY6TR reliable?
The price and inventory of STM32L151RDY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151RDY6TR is usually 5 days.
3.What payment methods are accepted for STM32L151RDY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151RDY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151RDY6TR?
STM32L151RDY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151RDY6TR 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 STM32L151RDY6TR?
For technical support, including STM32L151RDY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151RDY6TR requirements.
6.How does Aetrix verify that STM32L151RDY6TR is sourced from the original manufacturer or authorized distributors?
All STM32L151RDY6TR 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 STM32L151RDY6TR meets industry standards.
7.What is the process for return or replacement of STM32L151RDY6TR?
All STM32L151RDY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151RDY6TR, 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 STM32L151RDY6TR part is unused and in its original packaging.
Return procedure for STM32L151RDY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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