STMicroelectronics STM32L152QEH6

Overview

STM32L152QEH6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller featuring 512 KB Flash, 80 KB SRAM, 16 KB EEPROM with ECC, integrated LCD controller (8×40 segments), USB 2.0 interface, and dual 12-bit DACs. It operates from 1.65 V to 3.6 V across –40 °C to 105 °C and delivers 195 µA/MHz in Run mode - used in battery-powered medical wearables requiring long runtime, segment LCD display, and analog signal generation.

For engineers reviewing the STM32L152QEH6 datasheet, STM32L152QEH6 pinout, STM32L152QEH6 application, or STM32L152QEH6 equivalent, key selection criteria include ultra-low-power Stop mode current (560 nA), RTC+Standby leakage (1.11 µA), 102 I/Os with 5V tolerance, LCD driver capability, and USB 2.0 support with internal 48 MHz PLL - all critical for portable instrumentation and energy-harvested sensor nodes.

Technical Context

The STM32L152QEH6 implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run/Sleep, Stop, Standby) with hardware-accelerated wake-up from Stop mode in 8 µs. Its Cortex-M3 core runs up to 32 MHz with MPU, supporting RWW Flash operation via dual-bank architecture (2 × 256 KB).

Analog subsystem includes two rail-to-rail op-amps, two ultra-low-power comparators with window mode, a 12-bit 1 Msps ADC with up to 40 channels, and two buffered 12-bit DACs - enabling closed-loop sensor conditioning and precision analog output without external components.

Key Specifications

Pinout & Package

STM32L152QEH6 is housed in a 132-pin UFBGA package (7 × 7 mm, 0.5 mm pitch) with 116 fast I/Os - 102 of which are 5V tolerant and all mappable to 16 external interrupt vectors. The package supports fine-pitch PCB assembly and thermal performance suitable for compact portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L152QEH6, the STM32L432KCU6 trades LCD/ECC EEPROM for FPU and lower Stop current, while the STM32L152RET6 retains full peripheral compatibility but removes LCD support and reduces I/O count - making the QEH6 uniquely suited for battery-powered LCD-based instrumentation.

Availability

STM32L152QEH6 is available at Aetrix Electronics and suitable for portable medical monitors, smart utility meters, industrial sensor nodes, and energy-harvesting IoT endpoints requiring stable component supply, long-term lifecycle assurance, and qualified ultra-low-power performance.

Supply support for STM32L152QEH6 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 - optimized for battery longevity, wide temperature operation, and integrated analog peripherals to minimize external component count in portable and remote systems.

FAQ

What is the maximum operating frequency and core type of the STM32L152QEH6?

The STM32L152QEH6 features an Arm Cortex-M3 core rated for up to 32 MHz operation. It achieves 1.25 DMIPS/MHz (Dhrystone 2.1) and includes a Memory Protection Unit (MPU). Frequency scaling is dynamically managed via the embedded voltage regulator to maintain ultra-low-power operation across voltage ranges from 1.65 V to 3.6 V.

Does the STM32L152QEH6 include an integrated LCD controller, and what are its capabilities?

Yes, the STM32L152QEH6 integrates a dedicated LCD controller supporting up to 8 commons and 40 segments (8×40), with programmable contrast, blinking mode, and an internal step-up converter generating VLCD up to 5.5 V. This eliminates external bias circuitry and enables direct drive of monochrome segment LCDs in portable devices.

How many I/O pins does the STM32L152QEH6 have, and what is their voltage tolerance?

The STM32L152QEH6 provides up to 116 fast I/Os, of which 102 are 5V tolerant. All I/Os are individually configurable and mappable to 16 external interrupt vectors. The UFBGA132 package exposes 116 pins, with dedicated functions including USB D+/D−, LCD segment/common, and analog inputs/outputs.

What are the lowest power consumption modes supported, and what are their typical currents?

The STM32L152QEH6 supports Stop mode at 560 nA and Standby mode at 290 nA (with 3 wakeup pins). With RTC enabled, Standby consumes 1.11 µA. These values are measured at 25 °C with VDD = 3.0 V and all clocks disabled - verified per ST's DS10002 Rev 10 datasheet, Table 22 and Table 23.