STMicroelectronics STM32L151ZDT6

Overview

STM32L151ZDT6 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M3 microcontroller in LQFP144 package, featuring 384 KB Flash with ECC, 48 KB SRAM, 12 KB true EEPROM, USB 2.0 interface, and 12-bit ADC (1 Msps, up to 40 channels). It operates from 1.65 V to 3.6 V across –40°C to +105°C and delivers 33.3 DMIPS at 32 MHz - used in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L151ZDT6 datasheet, STM32L151ZDT6 pinout, STM32L151ZDT6 application, or STM32L151ZDT6 equivalent, key selection considerations include its 305 nA standby current, dual 12-bit DAC outputs with buffers, 3x operational amplifiers, 116 fast I/Os (102 5V-tolerant), and integrated LCD driver support (excluded in ZD variant per DS8576 Rev 13 p.2).

Technical Context

The STM32L151ZDT6 implements dynamic voltage scaling and multiple low-power modes including Stop mode (0.475 µA) and Standby mode (305 nA), with RTC retention and 16 wakeup lines. Its memory subsystem includes dual-bank Flash enabling Read-While-Write (RWW) and ECC protection for both Flash and EEPROM.

It integrates a full USB 2.0 device controller with internal 48 MHz PLL, five USARTs, up to eight SPIs (including two I2S), two I2Cs with SMBus/PMBus support, and SDIO interface - all operating down to 1.8 V analog supply. The 12-bit ADC supports up to 40 channels with temperature sensor and VREFINT calibration.

Key Specifications

Pinout & Package

LQFP144 (20 × 20 mm) package with exposed thermal pad; 144-pin quad flat pack suitable for automated assembly and thermal management in compact industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32L151ZDT6, the STM32L431RCT6 trades EEPROM and ultra-low standby for higher compute density and FPU, while the EFM32PG12B500F1024GL125 offers lower active current but requires external components for USB and analog output - making STM32L151ZDT6 optimal for integrated, battery-constrained designs needing USB, DAC, and EEPROM in one die.

Availability

STM32L151ZDT6 is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and qualified automotive-grade alternatives.

Supply support for STM32L151ZDT6 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, and MEMS sensors for industrial, automotive, and consumer markets.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and certified functional safety - optimized for wearables, metering, and environmental monitoring.

FAQ

Does STM32L151ZDT6 support USB device functionality without external components?

Yes. The STM32L151ZDT6 integrates a full-speed USB 2.0 device controller with internal transceiver and 48 MHz PLL, requiring only passive termination resistors and a USB connector. No external PHY or clock source is needed, reducing bill-of-materials and PCB area for embedded USB applications such as firmware updates or CDC virtual COM ports.

What is the maximum number of capacitive sensing channels supported?

The STM32L151ZDT6 supports up to 34 capacitive sensing channels using its built-in touch sensing controller (TSC). This enables robust proximity, slider, and wheel implementations without external ICs - validated for operation across –40°C to +105°C with automatic drift compensation and noise immunity features.

How does the 12 KB EEPROM differ from standard Flash-based emulated EEPROM?

This is true hardware EEPROM with dedicated silicon cells, supporting byte-level erase/write, 100k endurance cycles, and 40-year data retention at 85°C. Unlike Flash-emulated EEPROM, it requires no software wear-leveling, avoids blocking interrupts during writes, and guarantees atomic 1-byte updates - critical for logging timestamped events or storing calibration constants.

Is the LCD driver functional on STM32L151ZDT6?

No. Per ST's DS8576 Rev 13 (p.2), the LCD driver is excluded in STM32L151xD devices - including the ZD variant. Only STM32L152xD parts include the 8×40 segment LCD controller. Designers requiring display support must select STM32L152ZDT6 or add an external display controller.