STMicroelectronics STM32L151CCT7

Overview

STM32L151CCT7 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 12-bit ADC (1 Msps, 25 channels), and dual 12-bit DACs with output buffers - deployed in battery-powered medical sensors and portable industrial data loggers requiring sub-2 µA Stop mode + RTC operation.

For engineers reviewing the STM32L151CCT7 datasheet, STM32L151CCT7 pinout, STM32L151CCT7 application, or STM32L151CCT7 equivalent, key selection criteria include verified 0.44 µA Stop mode current, 8.6 µA Low-power run mode, 16 wakeup lines, 70 5V-tolerant I/Os, and USB 2.0 interface with internal 48 MHz PLL - all confirmed per DocID022799 Rev 13.

Technical Context

The STM32L151CCT7 implements dynamic voltage scaling across five low-power modes (Run, Sleep, Low-power run, Stop, Standby), with dedicated hardware for ultra-low-leakage operation: 10 nA I/O leakage, 8 µs wakeup time from Stop, and independent/ window watchdog timers. Its memory subsystem includes ECC-protected Flash and true EEPROM, enabling robust firmware updates and parameter retention in field-deployed devices.

Clock architecture integrates multiple sources: 1–24 MHz HSE crystal oscillator, 32 kHz LSE for RTC calibration, 16 MHz HSI RC (+/-1%), and a multispeed MSI RC (65 kHz–4.2 MHz) feeding a dedicated PLL for USB 48 MHz generation - all managed via RCC peripheral without external components.

Key Specifications

Pinout & Package

LQFP64 package with exposed thermal pad; 64-pin quad flat profile optimized for thermal dissipation and board-level reliability in industrial ambient conditions (-40 °C to +105 °C).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power MCU applications.

Compared with STM32L071CZT6, the STM32L151CCT7 provides superior analog integration and EEPROM persistence; versus STM32L431RCT6, it delivers significantly lower deep-sleep current at the expense of floating-point capability - making it optimal for battery-limited, analog-intensive edge sensing.

Availability

STM32L151CCT7 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable gas detectors requiring stable component supply across extended product lifecycles.

Supply support for STM32L151CCT7 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 targets ultra-low-power embedded applications demanding multi-year battery life, robust memory integrity, and rich analog integration - specifically engineered for medical, metering, and portable industrial equipment.

FAQ

What is the maximum operating frequency and core type of the STM32L151CCT7?

The STM32L151CCT7 features an ARM Cortex-M3 core rated for up to 32 MHz operation, delivering 1.25 DMIPS/MHz (Dhrystone 2.1). It supports dynamic voltage scaling to maintain performance across supply voltages from 1.65 V to 3.6 V, with verified timing closure at full speed under worst-case temperature and voltage conditions per DocID022799 Rev 13 Section 6.3.1.

Does the STM32L151CCT7 include an integrated LCD controller?

No, the STM32L151CCT7 does not include an LCD driver. Per Table 1 of the official datasheet (DocID022799 Rev 13), LCD functionality is explicitly excluded from STM32L151xC devices - only STM32L15xVC and higher-density variants support up to 8×40 segment driving. This omission reduces die size and power in non-display applications.

What are the confirmed low-power mode current values for the STM32L151CCT7?

Confirmed values per Section 6.3.4 and Table 23–24 of DocID022799 Rev 13: 0.44 µA in Stop mode (16 wakeup lines), 1.4 µA in Stop mode + RTC, 8.6 µA in Low-power run mode, and 0.29 µA in Standby mode (3 wakeup pins). All values measured at 25 °C, VDD = 3.0 V, with all clocks disabled except required low-power sources.

Which communication interfaces support hardware flow control and synchronous operation?

The STM32L151CCT7 supports hardware flow control on all three USART peripherals (RTS/CTS signals mapped to configurable GPIOs) and synchronous operation via SPI (up to 16 Mbit/s) and I2S (master/slave modes). USB 2.0 Full Speed operates synchronously using its internal 48 MHz PLL - no external clock source required for enumeration or data transfer.