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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersSTM32L072KZT6
STM32L072KZT6 Image
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STM32L072KZT6 - STMicroelectronics

Manufacturer Part Number
STM32L072KZT6
Manufacturer
STMicroelectronics
Allelco Part Number
32D-STM32L072KZT6
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
10,214 pcs available, New & Original
Parts Description
IC MCU 32BIT 192KB FLASH 32LQFP
Package
32-LQFP (7x7)
Data sheet
STM32L072KZT6.pdf

PCN Packaging

2.73KHz.pdf

PCN Assembly/Origin

STM8/STM32 10/Mar/2020.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 10214
  • Unit Price: $3.247
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $3.247 $3.25
10+ $2.835 $28.35
30+ $2.592 $77.76
100+ $2.344 $234.40
500+ $2.23 $1,115.00
1500+ $2.179 $3,268.50
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

STM32L072KZT6 Tech Specifications
STMicroelectronics - STM32L072KZT6 technical specifications, attributes, parameters and parts with similar specifications to STMicroelectronics - STM32L072KZT6

Product Attribute Attribute Value
Manufacturer STMicroelectronics
Voltage - Supply (Vcc/Vdd) 1.65V ~ 3.6V
Supplier Device Package 32-LQFP (7x7)
Speed 32MHz
Series STM32L0
RAM Size 20K x 8
Program Memory Type FLASH
Program Memory Size 192KB (192K x 8)
Peripherals Brown-out Detect/Reset, DMA, POR, PWM, WDT
Package / Case 32-LQFP
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Number of I/O 25
Mounting Type Surface Mount
EEPROM Size 6K x 8
Data Converters A/D 10x12b; D/A 2x12b
Core Size 32-Bit Single-Core
Core Processor ARM® Cortex®-M0+
Connectivity I²C, IrDA, SPI, UART/USART, USB
Base Product Number STM32L072

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN 3A991A2
HTSUS 8542.31.0001

Parts Introduction

STM32L072KZT6 Image
STM32L072KZT6 (1)

Manufacturer Part Number

STM32L072KZT6

Manufacturer

STMicroelectronics

STM32L072KZT6 Image
STM32L072KZT6 (2)

Introduction

Embedded Microcontroller for power-sensitive and performance-driven applications

Product Features and Performance

ARM Cortex-M0+ core architecture

32-Bit Single-Core processing for efficient handling of tasks

32MHz operating speed for responsive performance

Advanced connectivity with I2C, IrDA, SPI, UART/USART, USB

Comprehensive set of peripherals including Brown-out Detect/Reset, DMA, POR, PWM, WDT

192KB of flash program memory

6KB of EEPROM

20KB of RAM for data storage

10x12-bit A/D converters

2x12-bit D/A converters

Built-in internal oscillator

Wide operating temperature range from -40°C to 85°C

STM32L072KZT6 Image
STM32L072KZT6 (3)

Product Advantages

Low power consumption suitable for battery-powered devices

High integration to reduce external components and system costs

Support for multiple communication interfaces enabling versatile design choices

Key Technical Parameters

Speed: 32MHz

Number of I/Os: 25

Program Memory: 192KB FLASH

EEPROM: 6KB

RAM Size: 20KB

Supply Voltage: 1.65V to 3.6V

Data Converters: A/D 10x12b, D/A 2x12b

Mounting Type: Surface Mount

Package: 32-LQFP (7x7)

STM32L072KZT6 Image
STM32L072KZT6 (4)

Quality and Safety Features

Brown-out Detect and Reset for system integrity

Watchdog Timer (WDT) to ensure continuous operation

Qualified for industrial temperature ranges

Compatibility

STM32 ecosystem support for easy integration

Broad toolchain and software library support from STMicroelectronics and third-parties

STM32L072KZT6 Image
STM32L072KZT6 (5)

Application Areas

IoT devices

Consumer electronics

Industrial control systems

Smart home automation

Battery-operated applications

Product Lifecycle

Currently active product

Not near discontinuation

Replacements or upgrades are typically available within the STM32 microcontroller family

Reasons to Choose This Product

Ultra-low power consumption extending product battery life

Robust set of features enabling design flexibility

STMicroelectronics' strong support and resources

High reliability for demanding industrial applications

Exceptional performance-to-power consumption ratio in its class

Frequently Asked Questions(FAQ)

How does the STM32L072KZT6 compare to other STM32L0 series microcontrollers in terms of power efficiency and memory configuration for battery-operated IoT edge devices?
The STM32L072KZT6 offers a balanced profile within the STM32L0 series, delivering up to 32MHz operation with 192KB of flash memory and 20KB of RAM, which is among the higher-end configurations in the L0 family. Its ultra-low-power architecture supports multiple low-power modes, including a deep-sleep mode with current consumption as low as 1.0 µA. When compared to lower-memory variants like the STM32L052 or STM32L071, the L072KZT6 provides significantly more program storage without a proportional increase in active power draw, making it suitable for applications requiring moderate code complexity and data logging. This makes it particularly advantageous over smaller-footprint alternatives when firmware size begins to approach available resources.
What are the key trade-offs when selecting the STM32L072KZT6 for USB-based communication in embedded systems?
The inclusion of an integrated USB 2.0 full-speed peripheral in the STM32L072KZT6 allows direct host or device functionality without external transceivers, reducing component count and PCB area. However, this comes with constraints: the microcontroller requires a precise 48 MHz clock derived from its internal PLL, which limits flexibility in timing-sensitive applications unless the system can tolerate tight oscillator tolerance requirements. Additionally, while the USB interface simplifies firmware development for PC connectivity, it increases power consumption during active transfers—up to 10–15 mA—compared to non-USB peripherals like UART or SPI. Designers must also consider the 1.8V I/O voltage threshold on USB pins, necessitating level translation if interfacing with 3.3V-only peripherals.
Can the STM32L072KZT6 reliably operate in industrial environments with temperature fluctuations between -20°C and +70°C?
Yes, the STM32L072KZT6 is rated for operation from -40°C to +85°C, which fully encompasses the -20°C to +70°C range specified. Its internal voltage regulator and clock management circuits are designed to maintain stability across this extended thermal envelope. At cold temperatures, the startup time may increase slightly due to slower internal oscillator settling, but this is typically manageable with proper reset sequencing. The device’s flash memory retains programmed data down to -40°C, ensuring reliability for long-term storage in harsh conditions. Therefore, it meets industrial-grade environmental requirements out of the box without additional components.
What are the implications of using the STM32L072KZT6 in a system requiring both analog sensing and digital signal generation?
The STM32L072KZT6 integrates 10-channel 12-bit ADCs and two 12-bit DACs, enabling simultaneous acquisition and output of analog signals. For example, a sensor reading via ADC0 can be processed by the Cortex-M0+ core and used to generate a control voltage through DAC1, all within a single cycle-efficient loop. The ADC supports sample rates up to 1 Msps in continuous conversion mode, while the DACs offer update rates around 500 kSPS. A practical limitation arises when both converters share the same clock domain; thus, high-precision timing for one affects the other unless decoupled via DMA and careful timing planning. This makes the device ideal for motor control or audio applications where minimal latency between input and output is critical.
How should the STM32L072KZT6 be powered in a portable device to maximize battery life?
To optimize battery life, the STM32L072KZT6 should be supplied via a regulated 1.8V to 3.6V source, ideally using a buck converter or LDO with low quiescent current. The MCU supports dynamic voltage scaling: running at 3.0V allows full 32MHz performance, while stepping down to 1.8V enables reduced power consumption at lower frequencies. During idle periods, the STOP or STANDBY mode should be employed, where supply current drops below 1 µA. Additionally, disabling unused peripherals (e.g., USB, DAC) and configuring GPIOs as inputs with pull-downs reduces leakage. For coin-cell or lithium-thionyl chloride batteries, a precision voltage monitor can trigger shutdown before undervoltage lockout occurs, extending shelf life.
In what scenarios would the STM32L072KZT6 be preferred over an ESP32 or nRF52840 for wireless-connected applications?
While the ESP32 and nRF52840 integrate radio capabilities, the STM32L072KZT6 excels when wireless functionality is handled externally via UART-to-WiFi or BLE modules. Its ultra-low-power modes and deterministic response make it ideal for wake-on-interrupt architectures where the main processor remains asleep until a sensor event triggers an interrupt. The L072KZT6’s 192KB flash and 20KB RAM support complex state machines and protocol stacks (e.g., Modbus RTU, LoRaWAN class C), whereas adding radio via external module increases BOM cost and power overhead during transmission bursts. Thus, the L072KZT6 is better suited for gateways or sensors where power budget and real-time responsiveness outweigh integrated wireless convenience.
What considerations apply when using the STM32L072KZT6’s I2C interface in a noisy industrial setting?
The STM32L072KZT6’s I2C peripherals support standard (100 kbps) and fast (400 kbps) modes, but noise resilience depends heavily on physical layer design. In electrically noisy environments, pull-up resistors should be minimized (e.g., 2.2kΩ instead of 4.7kΩ) to reduce rise times and susceptibility to electromagnetic interference. Shielded cables and proper grounding are essential for long traces. Additionally, enabling the internal Schmitt-trigger input stage improves signal integrity at the expense of slightly higher power. Firmware-wise, implementing timeout detection prevents bus hangs from locking up the system. Unlike some competitors, the L072KZT6 lacks built-in I2C fault recovery, so software monitoring is mandatory in critical applications.
How does the EEPROM emulation in the STM32L072KZT6 affect write endurance and system reliability?
The STM32L072KZT6 does not have dedicated EEPROM but emulates it using flash sectors. Each flash block can endure approximately 10,000 erase/write cycles, meaning the effective EEPROM lifetime is constrained by how frequently specific memory locations are updated. For instance, storing 100 bytes every hour results in roughly 27 years of life if only one sector is used. To extend durability, wear leveling—either in hardware (if supported) or software—is necessary. The L072KZT6 includes a built-in flash memory controller that manages erase operations automatically, but developers must avoid writing to the same address repeatedly. Logging data incrementally or compressing writes improves longevity significantly compared to naive byte-by-byte updates.
Is the STM32L072KZT6 suitable for real-time motor control applications requiring precise PWM timing?
Yes, the STM32L072KZT6 includes multiple general-purpose timers capable of generating up to 16-bit resolution PWM signals with center-aligned or edge-aligned modes. With a 32MHz system clock, the timer resolution is 31.25 ns per tick, allowing microsecond-level precision. The advanced-control timer (TIM1) supports complementary outputs with dead-time insertion up to 255 ns, essential for half-bridge MOSFET drivers. However, achieving sub-microsecond jitter requires careful calibration of the internal HSI or external crystal, as temperature drift can shift timing over time. Compared to higher-performance MCUs, the L072KZT6 lacks hardware floating-point unit, so PID algorithms must run in fixed-point arithmetic—acceptable given the Cortex-M0+’s efficient integer execution.
What role does the brown-out detection feature play in the STM32L072KZT6’s robustness?
The STM32L072KZT6 features configurable brown-out reset (BOR) thresholds at 1.65V, 1.9V, and 2.1V, protecting against system instability during supply dips. If VDD falls below the selected threshold, the internal BOR circuitry forces a chip reset, preventing erratic behavior caused by insufficient voltage. This is especially critical in battery-powered designs where load transients or weak connections cause sudden drops. The BOR can be set via option bytes and operates independently of the core logic, ensuring protection even during firmware crashes. Unlike some MCUs that only detect undervoltage after reset, the L072KZT6 continuously monitors supply, offering proactive fault containment without software overhead.
How does the choice of packaging (Tray vs. Tape & Reel) impact the use of the STM32L072KZT6 in automated assembly?
The STM32L072KZT6 is available in a Tray package for prototyping and small-batch production, while Tape & Reel (T&R) versions are required for high-volume SMT lines. Trays allow manual handling but risk ESD damage during transport; they also require manual placement, increasing labor costs. T&R packaging enables pick-and-place machines to feed components continuously, improving throughput and reducing placement errors. For automated assembly, the 32-LQFP (7x7) footprint is compatible with standard nozzles, but fine-pitch leads demand precise alignment. The MSL 3 rating (168-hour floor life) applies regardless of packaging, so humidity control cabinets are necessary if parts sit unopened beyond that window.
Can the STM32L072KZT6 drive capacitive touch sensors directly?
No, the STM32L072KZT6 does not include a dedicated capacitive touch controller (CTIM). However, external ICs like the Freescale MC32P1020 or Microchip MTCH6102 can interface via I2C or SPI, with the L072KZT6 managing the host protocol. Alternatively, self-capacitance sensing can be implemented using the GPIOs and a simple RC timing circuit, though this consumes CPU cycles and limits channel count. Given the limited I/O (only 25 pins) and shared peripherals, adding touch sensing reduces available interfaces for other functions. Thus, direct drive isn’t feasible, but integration with third-party touch controllers is straightforward and common in user interfaces.
What are the limitations of using the STM32L072KZT6 for cryptographic applications?
The STM32L072KZT6 lacks hardware acceleration for AES, SHA, or ECC, making it unsuitable for high-throughput encryption. Software implementation of AES-128 on the Cortex-M0+ achieves ~10 KB/s, which may bottleneck secure boot or OTA updates. Additionally, the absence of a true random number generator (TRNG) requires software entropy sources, potentially compromising security if poorly implemented. While it supports basic CRC calculation, it cannot offload packet integrity checks. For lightweight authentication, pre-shared keys over TLS-PSK may be used, but performance remains constrained. Thus, the L072KZT6 is best paired with external crypto chips like the ATECC608A for sensitive deployments.
How does the internal oscillator accuracy affect the STM32L072KZT6’s UART baud rate tolerance?
The STM32L072KZT6 uses an internal 16 MHz HSI oscillator calibrated to ±1% at 25°C. This allows UART baud rates like 115200 bps with less than 2.5% error, meeting most serial communication standards. However, at temperature extremes (-40°C to +85°C), the HSI drifts beyond ±3%, which could cause framing errors in strict protocols (e.g., CAN, RS-485). For reliable operation, an external 8 MHz or 16 MHz crystal with TCXO improves accuracy to ±20 ppm. In such cases, the L072KZT6’s PLL can generate precise 48 MHz or 32 MHz clocks, enabling baud rates with sub-percent error margins. Therefore, critical serial links should avoid relying solely on HSI.
What is the impact of enabling DMA on the STM32L072KZT6’s interrupt latency?
Enabling DMA on the STM32L072KZT6 reduces CPU load during bulk data transfers (e.g., ADC to memory, UART RX buffers), freeing the Cortex-M0+ core for other tasks. Interrupt latency remains bounded by ~12 clock cycles (375 ns at 32 MHz) for priority 0 interrupts, unaffected by DMA activity since the NVIC handles prioritization transparently. However, if multiple peripherals trigger simultaneously, the L072KZT6’s single-core architecture means one service routine must yield to another, introducing queuing delays. Also, excessive DMA usage without double-buffering can lead to race conditions in circular buffer implementations. Despite this, DMA remains essential for maintaining real-time performance in streaming applications like sensor fusion or audio capture.
Why might the STM32L072KZT6 be chosen over a PIC32MZ despite similar pin counts?
Although the PIC32MZ offers higher performance (200 MHz) and hardware FPU, the STM32L072KZT6 wins in power-constrained environments due to its proven ultra-low-power modes and mature ecosystem. The L072KZT6 consumes 1.2 mA/MHz in run mode vs. 5–8 mA/MHz for the PIC32MZ, translating to days longer battery life in sleep-wake cycles. It also benefits from extensive HAL libraries, FreeRTOS support, and compatibility with ARM toolchains like Keil and GCC. Furthermore, the L072KZT6’s 192KB flash fits many embedded Linux ports (e.g., Zephyr), whereas the PIC32MZ often exceeds practical memory needs for non-Linux apps. Thus, the L072KZT6 strikes a better balance between capability and efficiency for mid-range IoT nodes.
How does the Moisture Sensitivity Level (MSL 3) affect storage and handling of the STM32L072KZT6?
The STM32L072KZT6 has an MSL 3 rating, indicating it can withstand exposure to ambient humidity for up to 168 hours (7 days) before soldering. Beyond this, moisture-induced popcorning risks increase during reflow. To mitigate, parts should be stored in dry cabinets with silica gel or nitrogen purging. Once opened, assembly must occur within 7 days, or baking (typically 125°C for 24 hours) is required to desorb moisture. This applies to both tray and reel formats. Compliance with JEDEC J-STD-020 ensures standardized handling, but engineers must track lot dates and usage timelines carefully to avoid yield loss in mass production.
What design precautions are needed when using the STM32L072KZT6 with an external USB PHY?
Although the STM32L072KZT6 includes a full-speed USB transceiver, many designs use external PHYs (e.g., Microchip USB251xB) for enhanced isolation or compliance testing. In such cases, the D+/D− lines must be routed with impedance-controlled traces (90 Ω differential), length-matched, and isolated from noisy digital nets. The L072KZT6’s USB pull-up resistor (1.5 kΩ) must connect to VBUS, and ESD protection diodes (e.g., TVS arrays) are strongly recommended at connectors. Firmware must handle USB enumeration correctly, including descriptor setup and endpoint configuration. Without external PHY, the internal transceiver suffices, but signal quality degrades over long cables (>1 m), making external buffering preferable for robust host communication.

Parts with Similar Specifications

The three parts on the right have similar specifications to STMicroelectronics STM32L072KZT6

Product Attribute STM32L072KZU6 STM32L072KBU7TR STM32L072CZY3TR STM32L072RBT6
Part Number STM32L072KZU6 STM32L072KBU7TR STM32L072CZY3TR STM32L072RBT6
Manufacturer STMicroelectronics STMicroelectronics STMicroelectronics STMicroelectronics
Connectivity - - - -
Mounting Type - Surface Mount Through Hole Surface Mount
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
EEPROM Size - - - -
Speed - - - -
Program Memory Type - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Voltage - Supply (Vcc/Vdd) - - - -
Core Size - - - -
Peripherals - - - -
RAM Size - - - -
Program Memory Size - - - -
Core Processor - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Base Product Number - DAC34H84 MAX500 ADS62P42
Number of I/O - - - -
Series - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Oscillator Type - - - -
Data Converters - - - -

STM32L072KZT6 Datasheet PDF

Download STM32L072KZT6 pdf datasheets and STMicroelectronics documentation for STM32L072KZT6 - STMicroelectronics.

HTML Datasheet
STM32L072x8,xB,xZ Datasheet.pdf
PCN Packaging
2.73KHz.pdf
PCN Assembly/Origin
STM8/STM32 10/Mar/2020.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

  • Daic***K.
    Mar 23, 2026

    Very good. No issue after long time testing.

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Electrostatic Discharge Protection and Handling

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STM32L072KZT6 Image

STM32L072KZT6

STMicroelectronics
32D-STM32L072KZT6

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