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STMicroelectronics STM32L151UCY6TR
- Part No.:
- STM32L151UCY6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 63-UFBGA, WLCSP
- Datasheet:
-
STM32L151UCY6TR.pdf
- Description:
- IC MCU 32BIT 256KB FLASH 63WLCSP
- Quantity:
- Payment:
- Shipping:
Inventory:934
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Product details
Overview
STM32L151UCY6TR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 256 KB Flash, 32 KB SRAM, 8 KB EEPROM with ECC, integrated LCD controller (up to 8×40 segments), and USB 2.0 interface. It operates from 1.65 V to 3.6 V across –40 °C to +105 °C and delivers 1.25 DMIPS/MHz performance. It targets battery-powered portable instrumentation, smart sensors, and wearable health monitors requiring long runtime and on-chip analog integration.
For engineers reviewing the STM32L151UCY6TR datasheet, STM32L151UCY6TR pinout, STM32L151UCY6TR application, or STM32L151UCY6TR equivalent, key selection criteria include standby current (0.29 µA), 12-bit ADC with 25 channels and 1 Msps sampling, dual 12-bit DACs with output buffers, ultra-low-power comparators with wake-up capability, and WLCSP63 package compatibility for space-constrained designs.
Technical Context
The STM32L151UCY6TR implements dynamic voltage scaling (DVS) with three operating ranges (UHV, HV, MV) to optimize power vs. performance. Its Cortex-M3 core supports Thumb-2 instruction set, MPU, and nested vectored interrupt controller (NVIC), enabling deterministic real-time response in mixed-signal embedded systems.
It integrates a full low-power peripheral suite: dual op-amps configurable as PGA or transimpedance amplifier, two ultra-low-power comparators with window mode and independent wake-up capability, and a dedicated LCD driver with contrast adjustment and step-up converter - all functional down to 1.8 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | ARM Cortex-M3, 32-bit, up to 32 MHz - enables deterministic real-time control with 1.25 DMIPS/MHz efficiency. |
| Memory | 256 KB Flash (with ECC), 32 KB SRAM, 8 KB true EEPROM (with ECC) - ensures data integrity and firmware resilience in field-deployed devices. |
| Power Modes | 0.29 µA Standby (3 wakeup pins), 0.44 µA Stop (16 wakeup lines), 8.6 µA Low-power run - extends battery life in intermittent-sensing applications. |
| Analog Peripherals | 12-bit ADC (1 Msps, 25 channels), 2×12-bit DAC (buffered outputs), 2×op-amps, 2×ultra-low-power comparators - supports sensor signal conditioning and analog feedback without external components. |
| Communication | 1×USB 2.0 (48 MHz PLL), 3×USART, up to 8×SPI (incl. 2×I2S), 2×I2C - enables local connectivity (I2C/SPI sensors), wired host interface (USB), and audio streaming (I2S). |
| Package | WLCSP63, 0.4 mm pitch, 3.17 × 3.17 mm - provides minimal footprint for wearables and compact IoT endpoints. |
| LCD Support | Up to 8×40 segment drive, contrast adjustment, blinking mode, integrated step-up converter - eliminates external LCD bias circuitry. |
Pinout & Package
STM32L151UCY6TR is housed in a 63-ball Wafer-Level Chip-Scale Package (WLCSP63) with 0.4 mm pitch and 3.17 × 3.17 mm body size, optimized for ultra-compact PCB layouts and thermal performance in thin-profile devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VDDA, VDDIO2 | Power supply inputs | Separate domains for digital core (VDD), analog (VDDA), and I/O (VDDIO2) enable noise isolation and flexible rail sequencing. |
| VSS, VSSA | Ground references | Dedicated analog ground (VSSA) minimizes coupling noise into ADC/DAC/OPAMP paths. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PE0–PE15 | General-purpose I/Os | Up to 70 5V-tolerant GPIOs, all mappable to 16 external interrupt vectors - supports flexible peripheral routing and robust input interfacing. |
| OSC_IN / OSC_OUT | External crystal oscillator terminals | Supports 1–24 MHz crystals for precise timing; paired with internal 32 kHz RTC oscillator for calendar functions. |
| USB_DP / USB_DM | USB 2.0 full-speed differential pair | Integrated transceiver with internal 48 MHz PLL eliminates need for external clock source in USB applications. |
| VLCD | LCD voltage supply output | Internal step-up converter generates adjustable VLCD rail (2.4–5.5 V) - removes external charge pump for segment LCDs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power operation | 0.29 µA Standby mode with 3 wakeup pins enables multi-year battery life in maintenance-free sensor nodes. |
| On-chip analog integration | Dual operational amplifiers + dual 12-bit DACs + 2 ultra-low-power comparators allow closed-loop analog signal processing without external ICs. |
| ECC-protected memories | 256 KB Flash and 8 KB EEPROM both include error-correcting code - critical for firmware integrity and long-term data logging reliability. |
| Capacitive touch sensing | Support for up to 23 channels via built-in CTSU - enables direct implementation of touch buttons, sliders, and wheels without dedicated controller. |
| Development support | Serial wire debug (SWD), JTAG, and ETM trace interfaces simplify firmware validation and real-time profiling in resource-constrained environments. |
Applications
| Portable Medical Sensor | Smart Utility Meter |
|---|---|
Use Scenario: Wearable ECG patch continuously monitoring heart rate and rhythm using dry electrodes and onboard signal conditioning. IC Role / Device Role / Timing Role: Main system controller executing acquisition firmware, driving LCD display, managing USB data upload, and regulating power states between measurements. Use Value: 0.44 µA Stop mode with 16 wakeup lines allows microsecond-latency wake-up from motion-triggered sampling, while integrated op-amps and ADC eliminate external front-end components. |
Use Scenario: Battery-backed water/gas meter reading ambient pressure, temperature, and flow via analog sensors, storing hourly logs for remote retrieval. IC Role / Device Role / Timing Role: Primary data logger with RTC, EEPROM-based storage, and low-power UART communication to RF module. Use Value: 8 KB EEPROM with ECC ensures decade-long retention of billing-critical consumption data; 1.15 µA Standby+RTC sustains 10+ year battery life. |
| Industrial Handheld Terminal | Wireless Sensor Node |
Use Scenario: Ruggedized barcode scanner with monochrome segment LCD, tactile keypad, and Bluetooth LE coexistence via USB host interface. IC Role / Device Role / Timing Role: Application processor handling UI rendering, button scanning, LCD refresh, and USB CDC communication to host PC. Use Value: Integrated LCD driver (8×40 segments) with contrast control and step-up converter reduces BOM count by eliminating external bias IC and discrete regulators. |
Use Scenario: LoRaWAN node measuring soil moisture, temperature, and light intensity in agricultural fields, transmitting data every 15 minutes. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating analog inputs, performing basic calibration, and managing sleep/wake cycles for RF transmission bursts. Use Value: 12-bit ADC with 25 channels and 1 Msps sampling supports simultaneous multi-sensor acquisition; 10 nA I/O leakage prevents parasitic discharge in high-impedance sensor circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M3 microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L071KBU6 | Lower memory (128 KB Flash, 20 KB RAM), no LCD driver, no DAC, single op-amp - smaller feature set, lower cost. | Suitable for simpler sensor nodes without display or analog output requirements. | Select when LCD, DAC, or dual op-amp functionality is unnecessary and BOM cost is primary constraint. |
| STM32L431CCU6 | Higher performance (80 MHz Cortex-M4F), larger memory (256 KB Flash, 64 KB SRAM), no EEPROM, no LCD driver - enhanced compute and DSP capability. | Better for applications needing floating-point math, audio preprocessing, or larger firmware footprints. | Choose when migrating from L1 to L4 architecture for increased processing headroom and future-proofing. |
Compared with STM32L151UCY6TR, STM32L071KBU6 sacrifices analog integration and display support for cost reduction, while STM32L431CCU6 trades EEPROM and LCD capability for higher CPU throughput and FPU - making each suitable for distinct tiers of ultra-low-power system complexity.
Availability
STM32L151UCY6TR is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial handheld terminals, and wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and consistent WLCSP63 packaging.
Supply support for STM32L151UCY6TR 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 since 1987.
The STM32L1 series was engineered specifically for ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust memory reliability - targeting wearables, metering, and environmental monitoring systems.
FAQ
Does STM32L151UCY6TR support USB device mode without external crystal?
Yes. The part integrates a 48 MHz PLL fed by its internal 16 MHz HSI RC oscillator, enabling full-speed USB 2.0 device operation without requiring an external crystal. This simplifies layout and reduces BOM count in cost-sensitive or space-constrained designs where USB connectivity is needed.
What is the maximum number of capacitive sensing channels supported?
The STM32L151UCY6TR supports up to 23 capacitive sensing channels using its built-in Capacitive Sensing Controller (CTSU). These channels can be configured as touch buttons, sliders, or proximity sensors, and operate independently of CPU load via hardware-accelerated measurement and filtering.
Is the 8 KB EEPROM truly erasable at byte level and endurance-rated?
Yes. The 8 KB true EEPROM supports byte-level write/erase operations and is rated for 400,000 erase/write cycles with 20-year data retention at 55 °C, verified per ST's production characterization. It uses the same ECC protection as Flash memory for bit-error resilience.
Can the integrated op-amps drive standard audio line-level signals?
No. The two operational amplifiers are optimized for low-power sensor signal conditioning (e.g., bridge amplification, filter stages) with rail-to-rail input/output and typical gain-bandwidth product of 160 kHz. They lack the slew rate and output current required for line-level audio drivers.
STM32L151UCY6TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 63-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:
- 256KB (256K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 8K x 8
- RAM Size:
- 32K 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:
STM32L151UCY6TR FAQ
1.How can I place an order for STM32L151UCY6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151UCY6TR 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 STM32L151UCY6TR reliable?
The price and inventory of STM32L151UCY6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151UCY6TR is usually 5 days.
3.What payment methods are accepted for STM32L151UCY6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151UCY6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151UCY6TR?
STM32L151UCY6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151UCY6TR 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 STM32L151UCY6TR?
For technical support, including STM32L151UCY6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151UCY6TR requirements.
6.How does Aetrix verify that STM32L151UCY6TR is sourced from the original manufacturer or authorized distributors?
All STM32L151UCY6TR 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 STM32L151UCY6TR meets industry standards.
7.What is the process for return or replacement of STM32L151UCY6TR?
All STM32L151UCY6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151UCY6TR, 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 STM32L151UCY6TR part is unused and in its original packaging.
Return procedure for STM32L151UCY6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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