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STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48
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STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48

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STM32L151CCT6 Product Overview

STM32L151CCT6 is an Arm Cortex-M3 MCU at 32 MHz, LQFP-48. 256 KB Flash, 32 KB SRAM, 4 KB EEPROM, 12-bit ADC (14 ch), two 12-bit DACs, two comparators, capacitive touch channels, LP timers, RTC, 3×USART, 2×SPI, 2×I2C. Up to 37 x 5 V-tolerant I/Os. 1.8–3.6 V, -40–85 °C. Compared to the STM32L151CBT6A (128 KB Flash, 16 KB SRAM), the STM32L151CCT6 significantly increases both Flash and SRAM, delivering a top-tier ultra-low-power platform for battery-powered sensors, portable meters, and industrial measurement applications that need generous memory and strong processing without a segment display.


STM32L151CCT6 Core Features

Core: The STM32L151CCT6 features an Arm Cortex-M3 32 MHz core with a low-power design

Memory: The STM32L151CCT6 provides 256 KB Flash, 32 KB SRAM, and 4 KB EEPROM, offering ample storage for complex firmware

Analog: 12-bit ADC (14 ch), 2×12-bit DACs, 2×Comparators, capacitive touch

Connectivity: 3×USART, 2×SPI, 2×I2C

Timers: LP Timer, GP Timers, RTC

I/Os: 37 (5 V-tolerant)

Package: LQFP-48

Temperature Range: -40°C to 85°C


STM32L151CCT6 Applications

Battery-Powered Sensors: The STM32L151CCT6 is ideal for wireless sensor nodes needing complex data processing and large code space

Portable Devices: High-performance wearables and portable medical devices can leverage the STM32L151CCT6's rich analog features

Industrial Metering: Water, gas, and electricity meters are perfect applications for the STM32L151CCT6

Consumer Electronics: Advanced remote controls, e-labels, and smart cards benefit from the STM32L151CCT6's compact integration

Energy Harvesting Applications: Self-powered sensor nodes and energy harvesting systems can rely on the STM32L151CCT6's ultra-low power consumption


STM32L151CCT6 Key Advantages

256 KB Flash + 32 KB SRAM: The STM32L151CCT6 delivers class-leading storage to comfortably handle complex algorithms and protocol stacks

Cortex-M3 Core + Ultra-Low Power: The STM32L151CCT6 achieves a perfect balance of excellent processing performance and long battery life

Dual DACs & Comparators: The STM32L151CCT6 offers flexible analog output and signal threshold detection without external chips

Capacitive Touch Sensing: Easily implement touch buttons and sliders for enhanced HMI

4 KB EEPROM: The STM32L151CCT6 provides secure storage for critical configuration and operational data

5 V-tolerant I/Os: Enhanced noise immunity and simplified external circuit design

Full Ecosystem Compatibility: Easy development with STM32CubeIDE/HAL/LL libraries for the STM32L151CCT6


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STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48STM32L151CCT6 ST Mainstream Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator Capacitive Touch LQFP-48 STM32L151CCT6 ST Arm Cortex-M3 Ultra-Low-Power 32-bit MCU 256KB Flash 32KB SRAM EEPROM DAC Comparator LQFP-48





FAQ

1. What is STM32L151CCT6?
STM32L151CCT6 is an ultra-low-power 32-bit MCU from STMicroelectronics' STM32L1 series, based on an Arm® Cortex®-M3 core in an LQFP-48 package (7 mm × 7 mm). Running at up to 32 MHz, the STM32L151CCT6 provides 256 KB Flash and 32 KB SRAM, along with a 12-bit ADC, 12-bit DAC, capacitive touch sensing (TSC), and a USB device interface. As a mid‑range memory variant of the L151 series without a segment LCD driver, the STM32L151CCT6 strikes a balance of high performance, rich analog features, and low power consumption in an easy‑to‑solder 48‑pin LQFP package, making it ideal for battery‑powered devices with moderate firmware sizes.

2. What are the key specifications of STM32L151CCT6?

  • Core: Arm® Cortex®-M3, up to 32 MHz, 1.25 DMIPS/MHz

  • Memory: 256 KB Flash, 32 KB SRAM

  • Operating Voltage: 1.65 V to 3.6 V

  • Temperature Range: -40 °C to +85 °C (industrial grade)

  • I/O Count: up to 37

  • Package: LQFP-48 (7 mm × 7 mm)

3. Is the LQFP-48 package on the STM32L151CCT6 easy to solder? Is it suitable for hand assembly?
The LQFP-48 has all pins exposed with a 0.5 mm pitch, allowing drag‑soldering of the STM32L151CCT6 with a standard iron—no hot‑air station or reflow oven required. Compared to the QFN variant (UFQFPN‑48), the STM32L151CCT6 offers significant advantages in hand soldering, visual inspection, and rework, making it an excellent choice for prototyping, small‑batch production, and educational use. The 7 mm × 7 mm size provides a good balance between manual handling and miniaturization.

4. What applications is STM32L151CCT6 suitable for?
With its compact 48‑pin package, 256 KB Flash, USB device interface, DAC, and capacitive touch sensing, the STM32L151CCT6 is well‑suited for battery‑powered devices that need rich analog features and USB communication without a segment display. Typical applications include portable medical monitors, wireless sensor nodes, USB dongles, industrial handheld data loggers, and compact IoT endpoints requiring local analog output and touch interaction.

5. What development tools support STM32L151CCT6?
ST provides free STM32CubeMX for graphical configuration and STM32CubeIDE as an integrated development environment for the STM32L151CCT6, along with the STM32CubeL1 firmware library. Debugging and programming are handled by ST‑Link debuggers. The NUCLEO‑L152RE board (LQFP‑64) can serve as a compatible prototyping platform for the STM32L151CCT6—though it carries a slightly different chip, the peripheral architecture is consistent, enabling straightforward code migration to the 48‑pin package after validation.

6. How does STM32L151CCT6 perform in terms of power consumption?

  • Temperature Range: -40 °C to +85 °C

  • Ultra‑low‑power modes of the STM32L151CCT6:

    • Standby mode: ~0.3 µA (no RTC)

    • Stop mode: ~0.5 µA (no RTC), ~1.3 µA with RTC

    • Low‑power Run mode: ~10 µA/MHz

    • Run mode: ~230 µA/MHz

7. What is the difference between STM32L151CCT6 and STM32L152CCT6? Why doesn't it have a segment LCD driver?
The core distinction is that the STM32L151CCT6 omits the segment LCD driver to achieve lower cost and power consumption. Beyond that, both share identical processing performance, memory sizes, and analog/digital peripherals (ADC, DAC, USB, TSC, etc.). If your application does not require a segment display, the STM32L151CCT6 is the more cost‑effective choice; if you need a segment display, the L152 is the way to go.

8. Is 32 KB SRAM on the STM32L151CCT6 sufficient for running a USB stack, and how can memory be optimized?
The 32 KB SRAM on the STM32L151CCT6 can support a lightweight RTOS (e.g., FreeRTOS) and standard USB device libraries (such as CDC virtual COM port or HID keyboard/mouse) with careful memory planning. Use static allocation to reduce fragmentation, minimize task stack sizes, strip unused library modules, and leverage DMA to offload background data transfers. If larger data buffers are needed, external SPI Flash or SRAM can be added for expansion.

9. What can the USB device interface on the STM32L151CCT6 do, and what are the special clock requirements?
The on‑chip USB 2.0 full‑speed device controller on the STM32L151CCT6 can be configured as a CDC virtual COM port, an HID device, or an MSC mass storage device for data exchange and firmware updates with a PC or mobile device. Because USB communication demands extremely tight clock accuracy (≤0.25% tolerance), the internal RC oscillator is insufficient for the STM32L151CCT6. An external 8 MHz or 16 MHz high‑precision crystal must be used to ensure stable connectivity.

10. What upgrade options are available if I need more Flash or SRAM than the STM32L151CCT6 provides?
If your code footprint grows or you need larger runtime memory beyond what the STM32L151CCT6 offers, you can upgrade to the pin‑compatible STM32L151RET6 (512 KB Flash / 80 KB SRAM), which uses the same LQFP‑64 package but doubles the storage. If your product later requires a segment display, you can seamlessly switch to the STM32L152 series with minimal hardware changes. All these devices are supported within the unified STM32Cube ecosystem, allowing extensive code reuse.

Property:
Specification
Product Type:
Arm Cortex-M3 Ultra-Low-Power 32-bit MCU
Brand:
STMicroelectronics
Core:
Cortex-M3 32 MHz
Package:
LQFP-48
Memory:
256 KB Flash, 32 KB SRAM, 4 KB EEPROM
Analog:
12-bit ADC, 2×12-bit DACs, 2×Comparators, Capacitive Touch
Connectivity:
USART, SPI, I2C
I/Os:
37
Voltage:
1.8V–3.6V
Temperature:
-40°C to 85°C
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