STMicroelectronics STM32L151C6T6A

Overview

STM32L151C6T6A from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 128 KB Flash, 32 KB SRAM, 4 KB EEPROM with ECC, 12-bit ADC (1 Msps, 24 channels), and dual 12-bit DACs - deployed in battery-powered medical sensors, portable industrial loggers, and smart utility meters requiring sub-µA standby operation.

For engineers reviewing the STM32L151C6T6A datasheet, STM32L151C6T6A pinout, STM32L151C6T6A application, or STM32L151C6T6A equivalent, key selection criteria include verified ultra-low-power mode current (0.28 µA Standby), integrated true EEPROM endurance (100k cycles), USB 2.0 full-speed support with internal 48 MHz PLL, and capacitive touch sensing capability for human-interface designs.

Technical Context

The device implements a 32-bit ARM Cortex-M3 core with MPU, operating from 32 kHz to 32 MHz, delivering 1.25 DMIPS/MHz; its power architecture supports five low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with hardware-controlled voltage scaling and dynamic clock gating.

Peripherals include a 7-channel DMA controller, 10 timers (6x 16-bit general-purpose with PWM/IC/OC), 2 ultra-low-power comparators with wake-up capability, and rich communication interfaces: 3x USART (with IrDA/ISO 7816), 2x SPI (16 Mbit/s), 2x I²C (SMBus/PMBus), and USB 2.0 full-speed with internal transceiver and PLL.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), 48-pin quad flat lead frame with exposed thermal pad - optimized for compact PCB layouts and thermal dissipation in space-constrained embedded modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151C6T6A, STM32L051K8U6 trades EEPROM and USB for lower cost and smaller footprint, while STM32L431CCU6 upgrades compute capability at the expense of ultra-low-power precision and nonvolatile data storage density.

Availability

STM32L151C6T6A is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM32L151C6T6A 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, MEMS, and automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and certified security features - specifically engineered for medical, metering, and environmental monitoring systems.

FAQ

What is the maximum operating frequency and core type of the STM32L151C6T6A?

The STM32L151C6T6A integrates an ARM Cortex-M3 32-bit core with a maximum CPU frequency of 32 MHz, achieving 1.25 DMIPS/MHz (Dhrystone 2.1). It includes a Memory Protection Unit (MPU) for secure task isolation and supports dynamic voltage scaling to optimize performance versus power consumption across operating modes.

Does the STM32L151C6T6A include on-chip EEPROM, and what are its endurance specifications?

Yes, it includes 4 KB of true on-chip EEPROM with built-in ECC, rated for 100,000 write/erase cycles and 20-year data retention at 55°C. This eliminates the need for external serial EEPROM in applications requiring frequent parameter logging or calibration storage, such as utility meters and medical devices.

Can the STM32L151C6T6A support USB communication without external components?

Yes - it integrates a full-speed USB 2.0 transceiver with internal pull-ups and a dedicated 48 MHz PLL, enabling USB device functionality using only the PA11/PA12 pins and standard USB connector. No external crystal, PHY, or termination resistors are required, simplifying design and reducing bill-of-materials cost.

What low-power modes are supported, and what is the lowest achievable current draw?

The device supports five low-power modes: Run, Sleep, Low-power Run, Stop, and Standby. The lowest current draw is 0.28 µA in Standby mode with three wakeup pins enabled and RTC running, verified per datasheet Rev 5 (DocID024330) under 3.3 V and 25°C conditions - ideal for infrequently awakened sensor endpoints.