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STMicroelectronics STM32L151QCH6
- Part No.:
- STM32L151QCH6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 132-UFBGA
- Datasheet:
-
STM32L151QCH6.pdf
- Description:
- IC MCU 32BIT 256KB FLSH 132UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,731
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Product details
Overview
STM32L151QCH6 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, 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 1.25 DMIPS/MHz performance. It targets battery-powered IoT sensors and portable medical devices requiring long runtime and integrated analog peripherals.
For engineers reviewing the STM32L151QCH6 datasheet, STM32L151QCH6 pinout, STM32L151QCH6 application, or STM32L151QCH6 equivalent, key selection criteria include standby current (305 nA), RTC-enabled stop mode (1.35 µA), 102 5V-tolerant I/Os, LCD driver support (excluding QCH6 variant), and dual 12-bit DACs with output buffers - all validated for industrial-grade reliability in constrained-energy systems.
Technical Context
The STM32L151QCH6 integrates a Cortex-M3 core with MPU, dynamic voltage scaling, and five low-power modes (Run, Sleep, Low-power Run, Stop, Standby) managed by an ultrasafe BOR and programmable PVD. Its clock system combines HSE (1–24 MHz), LSE (32.768 kHz), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz), plus a dedicated 48 MHz PLL for USB timing.
Analog subsystem includes two rail-to-rail op-amps, two ultra-low-power comparators with window mode and wake-up capability, 12-bit ADC with internal reference and temperature sensor, and two buffered 12-bit DACs. The device supports capacitive touch sensing on up to 23 channels and features CRC calculation unit with 96-bit unique ID.
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 1.25 DMIPS/MHz efficiency. |
| Memory | 256 KB Flash (ECC), 32 KB SRAM, 8 KB EEPROM (ECC) - supports firmware resilience, data logging, and parameter storage without external components. |
| Low-Power Modes | 305 nA Standby (3 wakeup pins), 1.35 µA Stop + RTC - extends coin-cell battery life to multi-year operation in metering and wearables. |
| Analog Peripherals | 12-bit ADC (1 Msps, 40 ch), 2×12-bit DAC (buffered), 2×op-amps, 2×ULP comparators - enables closed-loop sensor signal conditioning and analog output generation in single-chip designs. |
| Connectivity | USB 2.0 FS (48 MHz PLL), 3×USART, up to 8×SPI (2×I2S), 2×I2C - provides flexible host/device communication for firmware updates and sensor data aggregation. |
| I/O & Packaging | 102 5V-tolerant GPIOs, LQFP100 package (14 × 14 mm) - simplifies PCB layout with robust level-shifting and standard surface-mount assembly. |
Pinout & Package
LQFP100 (14 × 14 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial temperature grade (-40°C to +105°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers digital/analog circuits; VSS provides reference return path with low-noise decoupling requirements. |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/O | 102 total GPIOs; 5V-tolerant inputs allow direct interfacing with legacy logic; configurable as EXTI, AF, or analog inputs. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion; supports low-power reset sequencing. |
| BOOT0 | Boot mode selection | High at power-on selects system memory bootloader (USB/USART); enables field firmware recovery without debugger. |
| USB_DP / USB_DM | USB 2.0 full-speed differential pair | Integrated transceiver with internal 1.5 kΩ pull-up on DP; requires no external PHY - reduces BOM and board space for USB-CDC or HID applications. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power architecture | 305 nA standby + RTC retention enables >10-year coin-cell operation in smart utility meters and environmental monitors. |
| ECC-protected memories | Hardware ECC on Flash and EEPROM prevents silent data corruption in safety-critical firmware and calibration storage. |
| Capacitive touch controller | Supports up to 23 self- or mutual-capacitance channels - eliminates external touch ICs in handheld medical devices and industrial HMI panels. |
| Integrated analog front-end | Two op-amps, two ULP comparators, 12-bit ADC/DAC - enables analog sensor signal chain (e.g., thermistor, strain gauge) without discrete signal-conditioning components. |
| Pre-programmed USB bootloader | Factory-loaded ROM bootloader supports DFU over USB - allows secure firmware updates in deployed field units without JTAG hardware. |
Applications
| Smart Utility Metering | Portable Medical Sensors |
|---|---|
Use Scenario: Battery-powered gas/water meters with hourly RF transmission and lifetime >10 years. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition (pressure, flow), RTC-based scheduling, low-power RF wake-up, and secure data encryption. Use Value: 305 nA standby current and 1.35 µA stop+RTC mode directly enable decade-long operation on CR2450 cells without energy harvesting. |
Use Scenario: Wearable ECG patch with continuous analog front-end sampling and Bluetooth LE data streaming. IC Role / Device Role / Timing Role: Analog signal processor and BLE host controller - digitizing raw electrode signals via 12-bit ADC, filtering in Cortex-M3, and managing wireless link timing. Use Value: Integrated 2× op-amps and 2×12-bit DACs eliminate external instrumentation amplifiers and calibration DACs, reducing size and power overhead. |
| Industrial Wireless Sensor Node | Asset Tracking Beacon |
Use Scenario: Vibration/temperature node in predictive maintenance systems, reporting every 5 minutes via LoRaWAN. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating accelerometer, thermistor, and humidity data; managing deep-sleep cycles and wake-up triggers. Use Value: 11 µA low-power run mode and 8 µs wake-up time minimize active time during measurement bursts - critical for duty-cycled LoRa transmissions. |
Use Scenario: GPS-denied indoor asset tracker using BLE proximity and motion-triggered location logging. IC Role / Device Role / Timing Role: Motion-aware controller using internal comparators and accelerometer interface to detect movement and initiate GPS fix or BLE broadcast. Use Value: Ultra-low-power comparators with window mode and wake-up capability enable sub-µA event detection - extending battery life beyond 3 years on CR2032. |
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), lower standby (200 nA), but no EEPROM and reduced analog integration (no op-amps, single DAC). | Better for compute-intensive edge AI inference; less suitable for analog-heavy sensor nodes requiring EEPROM-based calibration storage. | Select when floating-point math or larger code footprint (>512 KB Flash) is required, and analog peripheral count can be reduced. |
| EFM32PG12B500F1024GL125 | ARM Cortex-M4, 256 KB Flash, 64 KB RAM, 32 KB EEPROM, 1.4 µA deep sleep - lacks USB and integrated LCD driver. | Stronger RF coexistence (sub-GHz radio optional), weaker USB connectivity - better for proprietary wireless protocols than USB-connected diagnostics. | Choose for battery-powered mesh nodes where USB is unnecessary and RF integration or deeper sleep is prioritized over analog richness. |
Compared with STM32L151QCH6, STM32L431RCT6 trades analog integration for higher CPU throughput and lower static current, while EFM32PG12B500F1024GL125 offers superior RF ecosystem support but omits USB and LCD - making STM32L151QCH6 optimal for USB-diagnostic, analog-rich, cost-sensitive industrial sensors.
Availability
STM32L151QCH6 is available at Aetrix Electronics and suitable for smart metering, portable medical sensors, industrial wireless nodes, and asset tracking beacons requiring stable component supply and long-term manufacturability.
Supply support for STM32L151QCH6 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, and MEMS sensors for industrial, automotive, and consumer markets.
The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and industrial temperature resilience - optimized for metering, wearables, and sensor edge nodes.
FAQ
Does STM32L151QCH6 support USB device mode without external crystal?
Yes. The STM32L151QCH6 integrates a 48 MHz PLL fed by its internal 16 MHz HSI RC oscillator, enabling full-speed USB 2.0 device operation without an external crystal. This reduces BOM cost and PCB area while maintaining USB compliance for CDC and HID class implementations.
What is the maximum number of capacitive sensing channels supported?
The STM32L151QCH6 supports up to 23 capacitive sensing channels using its built-in touch sensing controller (TSC). Channels can be configured in self-capacitance or mutual-capacitance mode, with hardware-accelerated acquisition and noise immunity features validated per IEC 61000-4-3.
Is the 8 KB EEPROM truly erasable at byte level?
Yes. The 8 KB data EEPROM is implemented as a separate memory block with byte-level write/erase capability and hardware ECC. Each byte supports ≥400k erase/write cycles and data retention of 20 years at 85°C, verified per ST's qualification testing in DS10262 Rev 8.
How many I/Os are 5V tolerant, and which pins are excluded?
102 GPIOs are 5V tolerant on STM32L151QCH6, covering all standard port pins except BOOT0, NRST, and JTAG/SWD debug pins (JTCK, JTMS, JTDO, JTDI, NJTRST). This allows direct interfacing with 5V logic families while maintaining safe operation under mixed-voltage system conditions.
STM32L151QCH6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 132-UFBGA
- 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:
- 109
- 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 40x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L151QCH6 FAQ
1.How can I place an order for STM32L151QCH6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L151QCH6 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 STM32L151QCH6 reliable?
The price and inventory of STM32L151QCH6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151QCH6 is usually 5 days.
3.What payment methods are accepted for STM32L151QCH6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151QCH6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L151QCH6?
STM32L151QCH6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L151QCH6 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 STM32L151QCH6?
For technical support, including STM32L151QCH6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151QCH6 requirements.
6.How does Aetrix verify that STM32L151QCH6 is sourced from the original manufacturer or authorized distributors?
All STM32L151QCH6 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 STM32L151QCH6 meets industry standards.
7.What is the process for return or replacement of STM32L151QCH6?
All STM32L151QCH6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151QCH6, 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 STM32L151QCH6 part is unused and in its original packaging.
Return procedure for STM32L151QCH6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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