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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32L152VBT6ATR

Name: STM32L152VBT6ATR
Brand: STMicroelectronics
SKU: STM32L152VBT6ATR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32L152VBT6ATR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 100-LQFP

Datasheet:: STM32L152VBT6ATR.pdf

Description:: IC MCU 32BIT 128KB FLASH 100LQFP

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Product details

Overview

STM32L152VBT6ATR 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, integrated LCD controller (up to 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 targets battery-powered industrial sensors, portable medical devices, and smart metering endpoints requiring long runtime and on-chip analog integration.

For engineers reviewing the STM32L152VBT6ATR datasheet, STM32L152VBT6ATR pinout, STM32L152VBT6ATR application, or STM32L152VBT6ATR equivalent, key selection criteria include standby current (0.28 µA), RTC-enabled Stop mode (1.38 µA), 12-bit ADC with 24 channels and 1 Msps, dual buffered DACs, and LCD driver with on-board step-up converter - all in LQFP100 package.

Technical Context

This MCU implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with sub-µA retention states and <8 µs wakeup latency. Its Cortex-M3 core runs up to 32 MHz with 1.25 DMIPS/MHz and includes a memory protection unit (MPU) for secure firmware partitioning.

The analog subsystem integrates two ultra-low-power comparators with window mode and wake-up capability, a temperature sensor, internal 1.22 V reference (VREFINT), and a 12-bit ADC supporting single-ended/differential inputs with programmable sampling time - all functional down to 1.8 V supply.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	ARM Cortex-M3, 32-bit, up to 32 MHz - enables deterministic real-time control with MPU for RTOS-safe memory isolation.
Memory	128 KB Flash (with ECC), 32 KB SRAM, 4 KB true EEPROM (with ECC) - supports robust firmware storage, volatile data buffering, and wear-levelled non-volatile parameter retention.
Power Consumption	0.28 µA Standby (3 wakeup pins), 1.38 µA Stop + RTC - extends coin-cell or energy-harvesting system lifetime to multi-year operation.
Analog Peripherals	12-bit ADC (1 Msps, 24 channels), 2×12-bit DAC (buffered outputs), 2×ultra-low-power comparators - enables high-fidelity sensor signal acquisition and precision analog output generation without external ICs.
Communication	1×USB 2.0 FS (48 MHz PLL), 3×USART (IrDA/ISO7816), 2×SPI (16 Mbit/s), 2×I²C (SMBus/PMBus) - supports wired connectivity, legacy protocol interfacing, and sensor hub aggregation.
LCD Driver	Up to 8×40 segment drive with contrast adjustment, blinking mode, and integrated step-up converter - eliminates external bias generator for segment LCD displays in portable instruments.
Timers & Control	10 timers including 6×16-bit GP timers (4×PWM/IC/OC each), 2×basic timers, 2×watchdogs (IWDG/WWDG) - provides flexible timing, motor control PWM, and safety-critical reset supervision.

Pinout & Package

LQFP100 (14 × 14 mm, 0.5 mm pitch) package with 83 fast I/Os (73 I/Os 5V tolerant), all mappable to 16 external interrupt vectors. Includes dedicated V_DDA/V_SSA, V_REF+/V_REF-, and VLCD rails for analog and LCD power integrity.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Main digital power/ground	Supplies core and digital peripherals; requires local 100 nF + 4.7 µF decoupling per VDD pair.
VDDA, VSSA	Analog power/ground	Isolated analog domain supply; must be filtered separately to maintain ADC/DAC accuracy and comparator stability.
VREF+, VREF-	ADC/DAC reference inputs	Enable external precision reference (e.g., 2.5 V) for improved analog measurement linearity and repeatability.
VLCD	LCD segment bias supply	Output of internal step-up converter; powers LCD glass directly - eliminates need for external charge pump or DC-DC.
PA0–PA15, PB0–PB15, etc.	General-purpose I/O	Configurable as GPIO, alternate function (USART/SPI/I²C/USB), or analog input; 73 pins support 5V tolerance for mixed-voltage system interfacing.

Key Features

Feature	Design Value
Ultra-low-power BOR	5 selectable brownout thresholds (1.65–2.9 V) - ensures reliable reset during battery sag without external supervisor IC.
Internal clock sources	HSI (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), LSE (32.768 kHz) - enables full clock redundancy and RTC operation without external crystals.
Capacitive sensing	20-channel CSD peripheral supporting touchkey, linear, and rotary sensors - replaces mechanical buttons and potentiometers with low-BOM-cost HMI.
DMA controller	7-channel peripheral-to-memory/memory-to-peripheral DMA - offloads CPU during ADC sampling, USB transfers, and SPI bursts to reduce active power.
Pre-programmed bootloader	USART-based ROM bootloader - enables field firmware updates without JTAG/SWD debug hardware.

Applications

Smart Utility Meter

Portable ECG Monitor

Use Scenario: Battery-powered electricity/water/gas meter with pulse counting, LCD display, and RF communication.

IC Role / Device Role / Timing Role: Main system controller managing metrology ADC, LCD refresh, RTC timestamping, and UART-to-RF bridge.

Use Value: 0.28 µA Standby + RTC keeps time and detects tampering events for >10 years on CR2032; integrated LCD driver reduces BOM by eliminating external bias IC.

Use Scenario: Handheld electrocardiogram device acquiring analog leads, processing waveform, and displaying results on monochrome LCD.

IC Role / Device Role / Timing Role: Signal acquisition engine with 12-bit ADC (24-channel multiplexed), dual DAC for calibration offset correction, and LCD controller driving 128×64 segment display.

Use Value: 1 Msps ADC resolution and low-noise analog front-end enable clinical-grade waveform fidelity; 1.38 µA Stop+RTC allows instant-on resume after button press.

Industrial Wireless Sensor Node

Low-Power HVAC Controller

Use Scenario: Battery-operated temperature/humidity/pressure node transmitting data via LoRaWAN or NB-IoT.

IC Role / Device Role / Timing Role: Sensor fusion hub aggregating I²C sensor data, running lightweight edge algorithm, and managing USB/USART for configuration and firmware update.

Use Value: 10.9 µA Low-power Run mode enables continuous sensor polling and BLE advertising at minimal current; CRC unit ensures OTA update integrity.

Use Scenario: Wall-mounted thermostat controlling relays, reading thermistors, and displaying setpoint via segmented LCD.

IC Role / Device Role / Timing Role: Real-time environmental controller with dual 12-bit DACs calibrating sensor offsets, ultra-low-power comparators monitoring fault conditions, and LCD driver managing 4-digit display.

Use Value: On-chip DACs eliminate external trimming components; 5V-tolerant I/Os simplify interface to legacy HVAC bus signals without level shifters.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32L432KCU6	ARM Cortex-M4F (FPU), 256 KB Flash, 64 KB SRAM, no EEPROM or LCD driver, lower standby (150 nA)	Better for floating-point math (motor control, audio); lacks integrated LCD and EEPROM - requires external components for same functionality.	Select when FPU or higher compute throughput is critical and LCD/EPPROM are handled externally.
EFM32PG12B500F1024GL125	Silicon Labs Gecko, ARM Cortex-M4, 1024 KB Flash, 256 KB RAM, no USB, no LCD, 1.4 µA EM4 (deep sleep)	Superior deep-sleep current but missing USB and LCD - suited for sub-GHz wireless nodes where those interfaces are unnecessary.	Choose for RF-centric designs prioritizing lowest possible sleep current and large code space over USB/LCD integration.

Compared with STM32L152VBT6ATR, STM32L432KCU6 trades EEPROM and LCD integration for FPU and lower standby current, while EFM32PG12B500F1024GL125 offers deeper sleep and larger memory but omits USB and LCD - making STM32L152VBT6ATR optimal for cost-sensitive, LCD-equipped, USB-configurable battery devices.

Availability

STM32L152VBT6ATR is available at Aetrix Electronics and suitable for smart utility meters, portable medical monitors, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle support, and guaranteed traceability.

Supply support for STM32L152VBT6ATR 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.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, integrated analog peripherals, and industrial temperature range operation - optimized for metering, wearable health, and IoT edge nodes.

FAQ

What is the maximum operating frequency and core type of STM32L152VBT6ATR?

The STM32L152VBT6ATR features an ARM Cortex-M3 core rated for up to 32 MHz operation. It delivers 1.25 DMIPS/MHz (Dhrystone 2.1) and includes a Memory Protection Unit (MPU) for secure memory partitioning. The maximum frequency is achievable across the full 1.65–3.6 V supply range with dynamic voltage scaling enabled.

Does STM32L152VBT6ATR support USB functionality, and what are its requirements?

Yes, it integrates a full-speed USB 2.0 device interface with an internal 48 MHz PLL, eliminating the need for an external crystal. It requires only standard USB D+/D− routing, VBUS sensing (optional), and proper 3.3 V regulation. No external PHY or clock source is needed - the USB module supports CDC, HID, and MSC class drivers out of the box.

How does the LCD controller in STM32L152VBT6ATR differ from basic segment drivers?

Unlike basic segment drivers, this MCU's LCD controller supports up to 8×40 segments with built-in contrast adjustment, blinking mode, and an on-chip step-up converter generating VLCD from VDD. This eliminates external charge pumps or DC-DC converters, reduces PCB area, and simplifies power design for monochrome segment LCDs in portable instruments.

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

It supports five low-power modes: Sleep, Low-power Run, Low-power Sleep, Stop, and Standby. The lowest current is 0.28 µA in Standby mode with three wakeup pins active and RTC disabled; with RTC enabled, Standby draws 1.11 µA. All modes retain SRAM and register content except Standby, which retains only backup registers and RTC.

STM32L152VBT6ATR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 100-LQFP

Series:: STM32L1

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M3

Core Size:: 32-Bit Single-Core

Speed:: 32MHz

Connectivity:: I2C, IrDA, LINbus, SPI, UART/USART, USB

Peripherals:: Brown-out Detect/Reset, Cap Sense, DMA, I2S, LCD, POR, PWM, WDT

Number of I/O:: 83

Program Memory Size:: 128KB (128K x 8)

Program Memory Type:: FLASH

EEPROM Size:: 4K x 8

RAM Size:: 32K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 24x12b; D/A 2x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32L152VBT6ATR FAQ

1.How can I place an order for STM32L152VBT6ATR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32L152VBT6ATR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM32L152VBT6ATR reliable?

The price and inventory of STM32L152VBT6ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L152VBT6ATR is usually 5 days.

3.What payment methods are accepted for STM32L152VBT6ATR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L152VBT6ATR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32L152VBT6ATR?

STM32L152VBT6ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32L152VBT6ATR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM32L152VBT6ATR?

For technical support, including STM32L152VBT6ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L152VBT6ATR requirements.

6.How does Aetrix verify that STM32L152VBT6ATR is sourced from the original manufacturer or authorized distributors?

All STM32L152VBT6ATR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32L152VBT6ATR meets industry standards.

7.What is the process for return or replacement of STM32L152VBT6ATR?

All STM32L152VBT6ATR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L152VBT6ATR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM32L152VBT6ATR part is unused and in its original packaging.

Return procedure for STM32L152VBT6ATR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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