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STMicroelectronics STM32L072RBT3

Name: STM32L072RBT3
Brand: STMicroelectronics
SKU: STM32L072RBT3
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32L072RBT3

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 64-LQFP

Datasheet:: STM32L072RBT3.pdf

Description:: IC MCU 32BIT 128KB FLASH 64LQFP

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Product details

Overview

STM32L072RBT3 from STMicroelectronics is an ultra-low-power 32-bit Arm® Cortex®-M0+ microcontroller in LQFP64 package, featuring 192 KB Flash, 20 KB SRAM, 6 KB EEPROM with ECC, USB 2.0 crystal-less interface, and dual 12-bit DACs. It operates from 1.65–3.6 V across –40 to +125 °C and delivers 0.86 µA Stop mode + RTC with 20-KB RAM retention-ideal for battery-powered industrial sensors and portable medical devices.

For engineers reviewing the STM32L072RBT3 datasheet, STM32L072RBT3 pinout, STM32L072RBT3 application, or STM32L072RBT3 equivalent, key selection criteria include ultra-low-power mode current (0.29 µA Standby), 12-bit ADC performance (1.14 Msps, 16-channel), USB crystal-less timing tolerance, DAC output buffer capability down to 1.8 V, and 78 I/Os with 5V tolerance.

Technical Context

The STM32L072RBT3 integrates a Cortex-M0+ core with MPU, supporting dynamic voltage scaling and clock gating to achieve sub-1 µA low-power states. Its memory subsystem includes dual-bank Flash with read-while-write and ECC, plus 6 KB of data EEPROM also protected by ECC-enabling robust firmware updates and parameter storage in harsh environments.

Its analog subsystem combines two independent 12-bit DACs with output buffers, two ultra-low-power comparators (operable down to 1.65 V with window mode and wake-up), and a 12-bit ADC with hardware oversampling and up to 16 channels-supporting simultaneous sensor signal conditioning and precision control loops without external components.

Key Specifications

Parameter	Value and Actual Design Meaning
Core	Arm Cortex-M0+, up to 32 MHz; enables deterministic real-time control with 0.95 DMIPS/MHz efficiency
Flash / SRAM / EEPROM	192 KB Flash (dual-bank, ECC), 20 KB SRAM, 6 KB EEPROM (ECC); supports safe over-the-air updates and nonvolatile configuration storage
Low-power modes	0.29 µA Standby (3 wakeup pins), 0.86 µA Stop + RTC + 20-KB RAM retention; extends coin-cell battery life to >10 years in periodic-sensing applications
ADC	12-bit, 1.14 Msps, 16-channel; achieves ±1 LSB INL at 10 ksps, usable down to 1.65 V supply
DACs	2 × 12-bit with output buffers; deliver rail-to-rail analog outputs down to 1.8 V, eliminating need for external op-amps in actuator drive
USB	USB 2.0 full-speed, crystal-less with battery charging detection; removes external 48 MHz crystal and reduces BOM cost and board area
I/O count / tolerance	78 GPIOs (5V tolerant on most), 24 capacitive sensing channels; enables direct interfacing with legacy 5 V peripherals and integrated touch UI

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, ECOPACK2 certified.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Power supply / ground	Dual power domains: VDDA for analog (1.65–3.6 V), VDD for digital; separate filtering required for ADC/DAC noise immunity
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD15, PH0–PH1	General-purpose I/O	78 total GPIOs; 5V-tolerant on most pins-allows mixed-voltage system integration without level shifters
PA1, PA2, PA3, PA4, PA5, PA6, PA7, PB0, PB1, PB2, PB10, PB11, PC0–PC5, PC13, PC14, PC15	ADC input channels	16-channel 12-bit ADC with hardware oversampling; supports differential mode and internal temperature sensor/VREFINT measurement
PA4, PA5	DAC outputs	Two independent 12-bit DACs with integrated output buffers; each drives ≥5 mA load directly, usable for analog setpoints or waveform generation
PA11, PA12	USB D+/D−	Crystal-less USB 2.0 FS interface; uses internal 48 MHz RC oscillator calibrated via CRS-eliminates external crystal and matching components
PC13, PC14, PC15	RTC/LSE functions	Supports 32.768 kHz external crystal for RTC accuracy ±20 ppm; PC13 also serves as tamper/wakeup pin

Key Features

Feature	Design Value
Ultra-low-power operation	0.29 µA Standby (3 wakeup pins), 5 µs wakeup from Flash-enables rapid response to intermittent events while preserving multi-year battery life
ECC-protected memories	192 KB Flash and 6 KB EEPROM both feature error-correcting code-prevents silent corruption in field-deployed firmware and calibration data
Crystal-less USB	Internal 48 MHz RC oscillator auto-calibrated via USB SOF packets-reduces component count, PCB area, and EMI risk vs crystal-based solutions
Dual buffered DACs	Two independent 12-bit DACs with rail-to-rail output buffers operating down to 1.8 V-supports direct driving of analog actuators or reference voltages without external amplification
Capacitive touch controller	24-channel TSC supporting touchkey, linear, and rotary sensors-enables intuitive HMI in space-constrained portable devices with no external IC

Applications

Smart Utility Meter

Wearable Health Monitor

Use Scenario: Battery-operated gas/water meter logging flow data hourly and transmitting via NB-IoT/LPWAN.

IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition (pressure/temperature), secure data encryption, RTC-timed transmission windows, and ultra-low-power sleep scheduling.

Use Value: 0.29 µA Standby and 0.86 µA Stop+RTC enable >15-year coin-cell operation; ECC Flash ensures firmware integrity over decades of field use.

Use Scenario: Continuous ECG/PPG monitoring patch with onboard signal conditioning and Bluetooth LE telemetry.

IC Role / Device Role / Timing Role: Analog front-end controller acquiring raw biosignals via ADC, performing real-time filtering, generating bias voltages via DACs, and managing BLE connectivity.

Use Value: Dual 12-bit DACs provide precise electrode biasing; 12-bit ADC with hardware oversampling achieves >14-bit ENOB for clinical-grade signal fidelity.

Industrial Wireless Sensor Node

Asset Tracking Beacon

Use Scenario: Ruggedized vibration/temperature node deployed in factory machinery, reporting condition data every 5 minutes via LoRaWAN.

IC Role / Device Role / Timing Role: Low-power host MCU coordinating MEMS sensor reads, CRC-secured packet assembly, and scheduled RF transmission bursts.

Use Value: 78 5V-tolerant I/Os simplify connection to legacy industrial sensors; 24-channel TSC enables on-device button/tamper detection without extra components.

Use Scenario: GPS-denied indoor asset tracker using BLE proximity and accelerometer-based motion detection.

IC Role / Device Role / Timing Role: Motion-triggered controller waking from Standby on accelerometer interrupt, reading sensor fusion data, and broadcasting encrypted BLE beacons.

Use Value: 3-wakeup-pin Standby mode allows immediate response to movement; 96-bit unique ID enables cryptographic device binding and anti-cloning security.

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
STM32L073RBT6	Same package and pinout; adds CAN FD controller and higher-temp grade (–40 to +125 °C same), but no functional difference in core/peripherals for non-CAN use cases	Required only when CAN FD bus communication is needed; otherwise identical software/hardware compatibility	Select STM32L073RBT6 only if CAN FD is mandatory; STM32L072RBT3 remains optimal for cost-sensitive, CAN-free designs
STM32L432KCU6	Cortex-M4F core (100 MHz), 256 KB Flash, 64 KB SRAM, no EEPROM; higher performance but 1.5× higher active current (110 µA/MHz vs 93 µA/MHz)	Better suited for DSP-intensive tasks (e.g., FFT-based vibration analysis); unsuitable where EEPROM-based parameter retention is required	Choose STM32L432KCU6 for compute-heavy edge processing; retain STM32L072RBT3 when EEPROM, ultra-low standby, or DAC/ADC precision dominate requirements

Compared with STM32L072RBT3, STM32L073RBT6 adds CAN FD at no pinout or power cost-ideal for industrial networks-while STM32L432KCU6 trades EEPROM and sub-µA standby for M4F performance and larger memory, better for algorithmic workloads but less optimal for long-life battery operation.

Availability

STM32L072RBT3 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM32L072RBT3 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 ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM32L0 series targets ultra-low-power embedded applications demanding multi-year battery life, robust memory integrity, and rich analog integration-including energy meters, medical wearables, and IoT edge nodes.

FAQ

What is the maximum operating frequency and core type of the STM32L072RBT3?

The STM32L072RBT3 features an Arm Cortex-M0+ core rated for up to 32 MHz operation. It achieves 0.95 DMIPS/MHz and includes a Memory Protection Unit (MPU) for secure task isolation. The maximum frequency is sustained across the full 1.65–3.6 V supply range and –40 to +125 °C temperature range, with dynamic voltage scaling optimizing power per performance point.

Does the STM32L072RBT3 support USB without an external crystal?

Yes-the STM32L072RBT3 integrates a factory-trimmed 48 MHz RC oscillator with automatic calibration via USB Start-of-Frame (SOF) packets, enabling full USB 2.0 full-speed (12 Mbps) operation without any external crystal or oscillator. This reduces BOM cost, PCB area, and EMI susceptibility while maintaining ±0.25% frequency accuracy required for USB compliance.

How many I/O pins are 5V tolerant, and what is their voltage rating?

78 of the 84 fast I/Os on the STM32L072RBT3 are 5V tolerant-specifically all GPIOs except those dedicated to USB (PA11/PA12), oscillator inputs (PH0/PH1), and BOOT0. These pins safely accept input voltages up to 5.5 V regardless of VDD level, enabling direct interfacing with 5 V logic, sensors, and industrial peripherals without external level-shifting circuitry.

What is the endurance and retention specification for the 6 KB data EEPROM?

The integrated 6 KB data EEPROM is specified for 100,000 write/erase cycles and 20-year data retention at 85 °C (or 40 years at 25 °C), with built-in ECC for single-bit error correction and double-bit error detection. Unlike external EEPROMs, it shares the same qualification and reliability testing as the MCU die-ensuring consistent lifetime behavior in mission-critical applications like utility metering and medical devices.

STM32L072RBT3 Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 64-LQFP

Series:: STM32L0

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M0+

Core Size:: 32-Bit Single-Core

Speed:: 32MHz

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

Peripherals:: Brown-out Detect/Reset, DMA, POR, PWM, WDT

Number of I/O:: 51

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

Program Memory Type:: FLASH

EEPROM Size:: 6K x 8

RAM Size:: 20K x 8

Voltage - Supply (Vcc/Vdd):: 1.65V ~ 3.6V

Data Converters:: A/D 16x12b; D/A 2x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32L072RBT3 FAQ

1.How can I place an order for STM32L072RBT3 through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32L072RBT3 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 STM32L072RBT3 reliable?

The price and inventory of STM32L072RBT3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L072RBT3 is usually 5 days.

3.What payment methods are accepted for STM32L072RBT3?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L072RBT3 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32L072RBT3?

STM32L072RBT3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32L072RBT3 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 STM32L072RBT3?

For technical support, including STM32L072RBT3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L072RBT3 requirements.

6.How does Aetrix verify that STM32L072RBT3 is sourced from the original manufacturer or authorized distributors?

All STM32L072RBT3 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 STM32L072RBT3 meets industry standards.

7.What is the process for return or replacement of STM32L072RBT3?

All STM32L072RBT3 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L072RBT3, 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 STM32L072RBT3 part is unused and in its original packaging.

Return procedure for STM32L072RBT3:

1.Submit a request within 90 days.

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

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