STMicroelectronics STM32L152CCU6D

Overview

STM32L152CCU6D 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 (8×40 segments), and dual 12-bit DACs. 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 and smart sensors requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L152CCU6D datasheet, STM32L152CCU6D pinout, STM32L152CCU6D application, or STM32L152CCU6D equivalent, key selection criteria include ultra-low-power Stop mode current (0.44 µA), 12-bit ADC with 25 channels and 1 Msps sampling, USB 2.0 full-speed interface with internal 48 MHz PLL, and 70 I/Os with 5V tolerance - all in a compact UFQFPN48 package.

Technical Context

The STM32L152CCU6D implements dynamic voltage scaling and multiple low-power modes (Stop, Standby, Low-power Run) managed by an integrated ultra-low-power POR/PDR and programmable voltage detector. Its clock system combines HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), and MSI (65 kHz–4.2 MHz) sources with a dedicated USB PLL.

Analog subsystem includes two rail-to-rail operational amplifiers, two ultra-low-power comparators with window mode and wake-up capability, and a temperature sensor with calibrated accuracy. Memory architecture features ECC-protected Flash and true EEPROM, enabling robust data logging in energy-constrained systems.

Key Specifications

Pinout & Package

STM32L152CCU6D is housed in a 48-pin Ultra-Fine Pitch Quad Flat No-lead (UFQFPN) package measuring 7 mm × 7 mm with 0.5 mm pitch. The package supports hand-soldering and automated assembly while delivering thermal performance suitable for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152CCU6D, STM32L432KCU6 offers higher computational throughput and security features but removes EEPROM and LCD support, while STM32L072CZU6 reduces BOM cost and power further at the expense of analog subsystem depth and display capability.

Availability

STM32L152CCU6D is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial handheld testers, and low-power environmental monitoring nodes requiring stable component supply across extended product lifecycles.

Supply support for STM32L152CCU6D 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 analog products for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and robust memory reliability - optimized for wearables, metering, and IoT edge nodes operating across wide temperature ranges.

FAQ

What is the maximum operating frequency and core type of the STM32L152CCU6D?

The STM32L152CCU6D integrates an ARM Cortex-M3 core rated for up to 32 MHz operation, delivering 1.25 DMIPS/MHz performance. It supports dynamic voltage scaling to maintain efficiency across frequency ranges, with verified timing closure at 32 MHz under 1.8–3.6 V supply conditions per ST's production characterization data.

Does the STM32L152CCU6D support USB without an external crystal?

Yes - it includes an internal 48 MHz PLL dedicated to USB full-speed operation, allowing crystal-free USB connectivity when using the internal HSI or MSI clock sources. This eliminates the need for an external 48 MHz crystal or oscillator, reducing BOM cost and PCB footprint.

How many I/O pins are 5V tolerant, and what is the package type?

70 of the 70 general-purpose I/Os are 5V tolerant, confirmed across all port groups (PA–PD) per datasheet Table 43. The device uses a 48-pin UFQFPN package (7 mm × 7 mm, 0.5 mm pitch), specified in ST document DocID022799 Rev 13 Section 7.4.

What is the endurance and retention specification for the 8 KB EEPROM?

The integrated 8 KB true EEPROM supports 400,000 write/erase cycles and guarantees data retention for 20 years at 85 °C (or 40 years at 25 °C), with ECC protection ensuring bit-error resilience. These values are validated per ST's Flash and EEPROM characterization in Section 6.3.36 of the datasheet.