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STM32L051C8T6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
STM32L051C8T6

STM32L051C8T6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics

The STM32L051C8T6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M0+ core running at up to 32 MHz. It integrates 64 KB of Flash memory and 8 KB of SRAM, with a rich set of peripherals including a 12-bit ADC, comparators, timers, and multiple communication interfaces (I2C, SPI, USART). The device operates from a 1.8V to 3.6V supply and features several low-power modes, making it ideal for battery-powered and energy-harvesting applications. Data verified as of 2026-08-05. What is an ultra-low-power microcontroller? An ultra-low-power microcontroller is a type of embedded processor designed to minimize energy consumption while maintaining computational capability. It fits within the broader hierarchy: ARM Cortex-M0+ core -> 32-bit microcontroller -> embedded processor -> semiconductor. These devices are optimized for applications where battery life is critical, such as IoT sensors, wearables, and portable medical devices. The STM32L0 series specifically targets the low-power segment with multiple sleep modes and dynamic voltage scaling. Key features include a 12-bit ADC with hardware oversampling, a low-power UART, and a real-time clock (RTC) with calendar. The device supports a wide operating temperature range of -40°C to +85°C and is available in a 48-pin LQFP package. The STM32L051C8T6 also includes a unique device ID, CRC calculation unit, and a true random number generator (RNG) for security applications. Technically, the STM32L051C8T6 is built on ST's ultra-low-power technology, featuring a flexible clock tree with multiple internal/external oscillators. It supports a 1.8V to 3.6V power supply and has a typical current consumption of 3.4 µA in Stop mode with RTC, and 0.29 µA in Standby mode. The device also includes a brown-out reset (BOR) and power-on reset (POR) for reliable operation. Typical applications include IoT sensor nodes, smart home devices, portable medical monitors, and industrial sensor interfaces. Its low power consumption and rich analog peripherals make it suitable for battery-powered designs where long operational life is required. When designing with this MCU, pay attention to the power supply decoupling and the selection of the appropriate low-power mode for your application. Use the STM32CubeMX tool to configure the clock tree and peripherals efficiently. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the ST datasheet, providing a comprehensive resource for engineers evaluating the STM32L051C8T6.

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STM32L052K6T6 - 32MHz USB Cortex-M0+ MCU | STMicroelectronics
STM32L052K6T6

STM32L052K6T6 - 32MHz USB Cortex-M0+ MCU | STMicroelectronics

The STMicroelectronics STM32L052K6T6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller operating at up to 32 MHz, with 32 KB of Flash memory and USB 2.0 crystal-less connectivity in a 32-LQFP 7x7 mm package. It combines low-power embedded control with serial peripherals for connected industrial, IoT, sensor, and USB-powered products. A microcontroller is a semiconductor that integrates a processor core, programmable memory, digital I/O, and peripherals into one device. The STM32L0 family belongs to the ARM Cortex-M microcontroller hierarchy and targets embedded systems where compact size, efficient processing, and low standby or operating power are important. Its peripheral integration reduces the component count needed for communications, timing, analog measurement, and control. The verified product information identifies an ARM Cortex-M0+ core, 32 MHz operation, 32 KB Flash organized as 32K x 8, USB 2.0 crystal-less connectivity, and a 32-LQFP package. Distributor listings also identify I2C and SPI support, making the device relevant for sensor networks, USB-to-serial equipment, compact control boards, and low-power connected products. The exact SRAM, voltage range, temperature limits, and peripheral ratings were not supplied in the verified excerpts and therefore are not asserted here. The crystal-less USB feature is a practical differentiator for designs that need USB connectivity without relying on a dedicated external crystal for the specified USB implementation. Firmware must still satisfy the USB clocking, impedance, power, and enumeration requirements described by the manufacturer. The 32 MHz Cortex-M0+ core provides a responsive platform for control logic while retaining the STM32 family's low-power positioning. Typical applications include low-power IoT nodes, USB-connected sensors, industrial instrumentation, low-power control boards, compact data-acquisition products, and embedded automation modules. These uses benefit from the MCU's combination of USB, I2C, SPI, Flash, and a compact 32-LQFP footprint. The 7x7 mm package is easy to route on a reasonably dense PCB while preserving exposed assembly and inspection access. Designers should verify the complete pinout, alternate-function mapping, power requirements, decoupling recommendations, clocking scheme, and USB layout against the official STM32L052K6 datasheet before layout release. USB differential routing, ground-return continuity, input filtering, and exposed-pad thermal design are more important than simply matching the package outline. Firmware should also confirm peripheral mapping and low-power-mode timing rather than assuming that a lower-power alternative is automatically interchangeable. This page combines verified distributor and manufacturer listings with structured application, comparison, and design guidance. It is intended to help engineers identify the correct STM32L052K6T6 platform while separating confirmed data from parameters that still require direct datasheet confirmation.

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STM32L052K6U6 - 32MHz USB Cortex-M0+ MCU | STMicroelectronics
STM32L052K6U6

STM32L052K6U6 - 32MHz USB Cortex-M0+ MCU | STMicroelectronics

STMicroelectronics STM32L052K6U6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller with a 32 MHz maximum clock, 32 KB flash memory, and USB 2.0 crystal-less connectivity in a 32-pin UFQFPN package measuring 5 mm by 5 mm. The device is designed for energy-sensitive embedded systems that require compact control, serial connectivity, timers, and low power operation. A microcontroller is a programmable integrated circuit containing a processor core, memory, peripherals, and input/output interfaces. The STM32L0 series belongs to the ARM Cortex-M0+ class of embedded processors, combining a compact instruction set with broad peripheral integration. This product hierarchy places the STM32L052K6U6 within microcontrollers, embedded processors, and the broader semiconductor category. Key verified features include a 32-bit ARM Cortex-M0+ core, operation up to 32 MHz, 32 KB flash, and USB 2.0 crystal-less connectivity. The 32-pin UFQFPN package supports compact surface-mount layouts where board area is constrained. Its low-power positioning makes it relevant for connected sensors, USB peripherals, industrial controls, and battery-operated equipment, provided that the selected operating modes and peripheral requirements are confirmed against the manufacturer documentation. The part is suitable when a design needs an Arm Cortex-M0+ control core, USB connectivity, and a compact package. Its 32 MHz clock specification provides a clear performance target for embedded firmware, while the 32 KB flash capacity should be checked carefully against application code size, bootloader requirements, and future updates. The crystal-less USB feature can simplify clock integration, but USB layout, power, firmware, and signal-integrity requirements still require careful implementation. Before design release, verify the complete pin assignment, electrical limits, memory map, USB support, operating-temperature grade, and package land pattern in the official STMicroelectronics documentation. The supplied verified data confirms the core, clock, flash, USB connectivity, package, and distributor identity, but it does not provide every electrical or pin-level parameter required for a complete hardware design. This product page combines verified manufacturer and distributor information, structured specifications, application guidance, and design considerations. It is intended to support component identification and sourcing while clearly identifying details that still require confirmation from the official STM32L052K6 datasheet.

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STM32L053C8T6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
STM32L053C8T6

STM32L053C8T6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics

The STMicroelectronics STM32L053C8T6 is an ultra-low-power 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at up to 32 MHz. It features 64 KB of Flash memory and 8 KB of SRAM, with a rich set of peripherals including USB 2.0, 12-bit ADC, DAC, comparators, and multiple communication interfaces. The device is housed in a 48-pin LQFP package, making it suitable for space-constrained applications. An ultra-low-power microcontroller (MCU) is a system-on-chip that integrates a processor core, memory, and peripherals, optimized for minimal energy consumption. The STM32L0 series is part of the STM32 family, which spans from entry-level Cortex-M0+ to high-performance Cortex-M7 cores. These MCUs are designed for battery-powered and energy-harvesting applications where power efficiency is critical, often featuring multiple low-power modes and dynamic voltage scaling. Key features include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Standby with RTC), a 12-bit ADC with hardware oversampling, a 12-bit DAC, two ultra-low-power comparators, and a USB 2.0 crystal-less device. The device also integrates a real-time clock (RTC) with calendar and alarm functions, and a true EEPROM emulation. The operating voltage range is 1.8V to 3.6V, with a temperature range of -40°C to +85°C. The STM32L053C8T6 is built on ST's ultra-low-power technology, featuring a flexible power management that allows the core to run at 32 MHz while consuming only 84 µA/MHz in Run mode. The device supports a wide range of communication interfaces including I2C, SPI, USART, and LPUART, making it versatile for IoT and sensor applications. The integrated USB 2.0 interface supports both device and host modes, with a crystal-less design that reduces BOM cost. Typical applications include IoT sensor nodes, wearable devices, smart home controllers, industrial sensors, and portable medical devices. The ultra-low-power consumption and rich analog peripherals make it ideal for battery-powered systems that require long operational life. The device also supports firmware updates via USB or UART bootloader, simplifying field maintenance. When designing with this MCU, careful attention should be paid to the power supply decoupling and the selection of low-power modes to maximize battery life. The use of the internal 16 MHz HSI oscillator can reduce external component count, but for precise timing, an external crystal is recommended. The device's low-power modes require proper configuration of the RTC and wake-up sources to achieve optimal energy efficiency.

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STM32L053R8T6 - 32MHz Ultra-Low-Power Cortex-M0+ MCU | ST
STM32L053R8T6

STM32L053R8T6 - 32MHz Ultra-Low-Power Cortex-M0+ MCU | ST

The STMicroelectronics STM32L053R8T6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller with a maximum CPU frequency of 32 MHz, 64 KB of Flash memory, 8 KB of SRAM, and a 64-pin LQFP-64 (10x10 mm) package. What is an ultra-low-power microcontroller? It is an embedded processor optimized to minimize energy consumption while still providing enough compute for sensing, control, and communication tasks. It sits in the product hierarchy: microcontroller -> ARM Cortex-M0+ -> ultra-low-power MCU -> battery-powered embedded system. These devices rely on low-leakage process technology, flexible clock gating, and sleep/stop/standby modes to cut current draw to microamp or nanoamp levels, enabling multi-year operation from a coin cell. Key features include a USB 2.0 full-speed crystal-less device controller, an LCD driver supporting up to 8x28 segments, a 12-bit ADC with hardware oversampling, a 12-bit DAC, two ultra-low-power comparators, and a real-time clock with calendar. The STM32L053R8T6 runs from a 1.8 V to 3.6 V supply (down to 1.65 V in power-down without BOR), operates from -40C to +125C, and provides I2C, SPI, and USART serial interfaces. Technically, this MCU is built in a 110 nm ultra-low-leakage process. It integrates an NVIC, a memory protection unit, a true random number generator, a CRC calculation unit, and a unique 96-bit device ID. Typical Run-mode consumption is 84 uA/MHz, while Standby with RTC is only 0.29 uA. The flexible clock tree accepts an internal 16 MHz RC, an external crystal, or a 32.768 kHz oscillator for low-power RTC timekeeping. Typical applications include portable medical devices, wireless IoT sensor nodes, smart utility meters, wearable devices, and LCD-equipped industrial products. The very low standby current and configurable wake-up events make this MCU ideal for systems that must spend most of their life asleep and wake periodically to sample, log, or transmit. When designing with this device, place a 100 nF decoupling capacitor near each VDD pin and a 1 uF bulk capacitor on the main supply. Configure the RTC, EXTI, or USART wake-up sources to keep average current in the microamp range while preserving responsiveness. This page synthesizes distributor availability, drop-in STM32L0 alternatives, comparison data, and practical low-power design notes that are not reprinted in the datasheet, helping engineers select and validate the part faster.

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STM32L071CBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
STM32L071CBT6

STM32L071CBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics

The STM32L071CBT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M0+ core. It operates at a maximum frequency of 32 MHz and features 128 KB of Flash memory and 20 KB of SRAM. The device is housed in a 48-pin LQFP package (7x7 mm) and is designed for a wide range of battery-powered and energy-efficient applications. An ultra-low-power microcontroller (MCU) is a type of integrated circuit that combines a processor core, memory, and peripherals on a single chip, optimized for minimal power consumption. The STM32L0 series is part of the broader STM32 family, which includes various ARM Cortex-M based MCUs. These devices are essential in embedded systems where energy efficiency is critical, such as IoT devices, wearables, and industrial sensors. The STM32L071CBT6 sits within the STM32L0 category, which is known for its low-power modes and high integration. Key features of the STM32L071CBT6 include multiple low-power modes (Sleep, Low-power run, Low-power sleep, Stop with RTC, Stop without RTC, Standby with RTC, Standby without RTC), a 12-bit ADC with hardware oversampling, a 12-bit DAC, two comparators, and a wide range of communication interfaces including I2C, SPI, USART, and LPUART. The device also integrates a USB 2.0 full-speed device controller, a real-time clock (RTC) with calendar, and a true random number generator (TRNG). The STM32L071CBT6 is built on STMicroelectronics' ultra-low-power technology, which enables a dynamic current consumption as low as 87 uA/MHz in Run mode and 0.4 uA in Standby mode with RTC. This makes it ideal for applications that require long battery life, such as smart meters, medical devices, and wireless sensor nodes. The device also supports a wide supply voltage range from 1.65V to 3.6V, allowing operation from a single coin cell battery. Typical applications include IoT edge nodes, portable medical devices, smart home sensors, and industrial monitoring systems. The rich set of analog peripherals and communication interfaces makes it a versatile choice for many embedded designs. When designing with the STM32L071CBT6, it is important to consider the power supply decoupling and the use of the low-power modes to maximize battery life. The device supports a flexible clocking scheme with an internal 16 MHz RC oscillator, an external crystal oscillator, and a PLL. Proper PCB layout with short, low-inductance traces for the crystal and decoupling capacitors is recommended for reliable operation.

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STM32L071CBT7 - 32MHz Cortex-M0+ 128KB MCU | STMicroelectronics
STM32L071CBT7

STM32L071CBT7 - 32MHz Cortex-M0+ 128KB MCU | STMicroelectronics

The STMicroelectronics STM32L071CBT7 is an ultra-low-power Arm Cortex-M0+ 32-bit microcontroller with a 32 MHz CPU, 128 KB of Flash memory, and a 48-LQFP 7 x 7 mm package. It belongs to STMicroelectronics' STM32L0 access-line family and is intended for compact, energy-conscious embedded products. The verified distributor data identifies the MCU as a 32-bit device with 128 KB organized as 128K x 8, while the manufacturer page describes the STM32L071xx family's 32 MHz Cortex-M0+ core. An ultra-low-power microcontroller is a semiconductor component optimized to complete embedded control tasks while minimizing energy consumption during active operation, standby, and wake-up transitions. The STM32L0 family sits within the broader hierarchy of microcontroller, embedded processor, embedded control IC, and power-conscious semiconductor. This positioning makes the STM32L071CBT7 suitable for products where battery life, compact size, deterministic control, and low system overhead matter more than maximum compute throughput. The verified data highlights three principal attributes: a 32 MHz Arm Cortex-M0+ processor, 128 KB of Flash memory, and a 48-LQFP 7 x 7 mm package. LCSC additionally identifies a 12-bit conversion feature and an operating temperature range of -40 C to +105 C. These details make the device a general-purpose embedded controller for low-power sensing, actuator control, portable equipment, and compact industrial modules. The exact RAM, peripheral, voltage, current, and package-pin details must be confirmed against the manufacturer datasheet before design release. The STM32L071CBT7 is intended for firmware that benefits from a familiar Arm Cortex-M ecosystem, efficient 32-bit instruction execution, and embedded Flash-resident program storage. Its 128 KB Flash capacity is larger than many minimal microcontrollers and can accommodate boot code, application logic, configuration tables, and protocol handlers. The 32 MHz clock provides useful processing headroom for sensor polling, digital filtering, user-interface state machines, and communication-stack tasks, although real-time performance remains dependent on peripherals and firmware configuration. Typical embedded uses include low-power environmental sensors, battery-operated portable instruments, compact motor or actuator controllers, connected sensing nodes, and industrial automation modules. In a sensor node, the MCU could acquire measurements, filter data, manage a low-power duty cycle, and store operating parameters. In an industrial module, it could coordinate inputs and outputs while supporting field-bus or serial communication. The package and exact peripheral complement should be selected against the mechanical drawing and pin definition. The primary design consideration is to validate every electrical and pin requirement from the official manufacturer datasheet before layout. Confirm the complete LQFP-48 pin map, supply limits, decoupling requirements, oscillator connections, I/O limits, and programming interface. For a new ultra-low-power design, calculate average current from the selected operating mode, peripheral load, wake-up rate, and measurement duty cycle rather than relying only on the maximum clock frequency. This page consolidates exact distributor and manufacturer facts, distinguishes verified data from missing parameters, and adds selection, sourcing, and design guidance. It also avoids presenting unverified pin mappings or cross-manufacturer drop-in claims as guaranteed replacements.

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STM32L071K8U3 - 32MHz, 64KB Ultra-Low-Power MCU | ST
STM32L071K8U3

STM32L071K8U3 - 32MHz, 64KB Ultra-Low-Power MCU | ST

The STMicroelectronics STM32L071K8U3 is an ultra-low-power, 32-bit Arm Cortex-M0+ microcontroller with a 32 MHz operating frequency, 64 KB of Flash memory, and a 32-pin UFQFPN package measuring 5 mm by 5 mm. It is designed for compact, battery-powered embedded systems that need efficient processing, low standby power, and integrated mixed-signal capabilities without requiring a large external memory subsystem. What is an ultra-low-power microcontroller? An ultra-low-power MCU is a semiconductor controller optimized to complete sensing, control, and communications tasks while consuming little active and sleep energy. The STM32L0 access line belongs to the STM32 family of 32-bit Arm Cortex-M microcontrollers and combines a low-power CPU with timers, communication peripherals, analog conversion, and GPIO in one package. This integration reduces board area, component count, and system power compared with a discrete control design. Verified source data identifies an Arm Cortex-M0+ core, 32 MHz maximum operating frequency, 64 KB organized as 64K x 8 Flash, and a 32-UFQFPN 5 x 5 mm package. The Mouser listing further identifies the device as an ultra-low-power Arm Cortex-M0+ MCU with 64 KB of Flash and a 32 MHz CPU. Additional RAM size, supply-voltage range, ADC characteristics, timer resources, GPIO count, and package tolerances are not present in the supplied source excerpts and therefore require confirmation from the manufacturer documentation. The STM32L0 architecture is suitable for energy-sensitive control systems because software can place the processor into low-power operating states between events. Low-power execution is particularly useful for portable sensors, where the MCU may wake to read an analog value, update an output, exchange data, and return to sleep. The 64 KB Flash capacity also accommodates embedded firmware, boot logic, configuration data, and application code in a compact 32-pin package. Typical uses for this microcontroller include connected environmental sensors, compact industrial monitors, battery-powered data loggers, appliance controllers, low-power wireless sensor nodes, and wearable accessories. Selection should prioritize verified peripheral compatibility, pin-level requirements, firmware portability, and power-mode support rather than core frequency alone. A firmware migration between STM32 families is simpler when peripheral behavior and software abstractions remain consistent, but a new design still requires board-level review. PCB implementation should preserve clean grounding and short analog paths around MCU power and sensing pins. Decoupling capacitors should be placed close to the associated supply pins, while exposed-pad or thermal requirements must follow the exact land pattern in the official package drawing. Firmware should use the correct startup vector table, clock initialization, and low-power mode transitions; excessive polling can negate the benefit of a sleep-capable MCU. This page combines verified distributor and manufacturer listings, commercial availability links, procurement context, and package-specific design guidance. It does not infer undocumented electrical values, and it distinguishes confirmed STM32L071K8U3 facts from parameters that still require verification in the official datasheet.

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STM32L072CBT6 - 32MHz Cortex-M0+ MCU 128KB Flash USB | STMicroelectronics
STM32L072CBT6

STM32L072CBT6 - 32MHz Cortex-M0+ MCU 128KB Flash USB | STMicroelectronics

The STMicroelectronics STM32L072CBT6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller running at up to 32 MHz with 128 KB of Flash, 20 KB of SRAM, and a crystal-less USB 2.0 full-speed device interface, supplied in a 48-pin LQFP (7x7 mm) industrial-grade package. An MCU (microcontroller unit) integrates a CPU core, embedded memory, and peripherals on a single chip, acting as the compute element in embedded designs. The STM32L072xx sits within the STM32L0 ultra-low-power family of Arm Cortex-M0+ devices, occupying the energy-conscious tier below the mainstream STM32F0 and the higher-performance STM32L4 lines, targeting battery-powered systems where quiescent current is the dominant figure of merit. Differentiating features include the crystal-less USB 2.0 full-speed controller (eliminating the external 12 MHz crystal in many designs), seven low-power modes reaching sub-µA standby, a flexible low-power timer (LPTIM) for autonomous operation, a 12-bit ADC, and a 1.65 V to 3.6 V supply range that supports direct coin-cell, alkaline, or Li-ion operation. Multiple USART, SPI, and I2C interfaces aggregate sensors and radios. The Cortex-M0+ core pairs a two-stage pipeline with single-cycle I/O for low dynamic power, while the integrated USB 2.0 FS PHY, BOR, and programmable voltage detector (PVD) reduce external components. Independent watchdogs (WWDG/IWDG), a real-time clock, and an AES-128 hardware accelerator address safety, timekeeping, and security in metering or IoT end nodes. Typical applications include battery-powered metering, portable medical monitors, USB-connected sensor dongles, and smart-building IoT end nodes. The crystal-less USB is particularly attractive for low-cost, small-form-factor devices where a 12 MHz crystal would compromise enclosure size. Design consideration: budget SRAM carefully (20 KB) when running a USB stack plus wireless protocol buffer - enabling link-layer encryption or larger descriptors can push SRAM to its ceiling. This page synthesizes distributor pricing, pin-compatible STM32L0 alternatives, and practical design notes not found in the manufacturer datasheet.

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STM32L072CZT6 - 192KB Flash Cortex-M0+ MCU | STMicroelectronics
STM32L072CZT6

STM32L072CZT6 - 192KB Flash Cortex-M0+ MCU | STMicroelectronics

The STMicroelectronics STM32L072CZT6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller with 192 KB of Flash, 20 KB of SRAM, and integrated USB 2.0 (crystal-less) in a 48-pin LQFP (7x7 mm) package. It runs at up to 32 MHz and operates from a 1.65 V to 3.6 V supply, making it suitable for battery-powered and energy-harvesting applications. The part belongs to the STM32L0 ultra-low-power family with multiple low-power modes (Stop, Standby, Shutdown) drawing sub-microamp quiescent currents. An ARM Cortex-M0+ microcontroller (MCU) is a 32-bit RISC processor core from ARM's Cortex-M family optimized for energy efficiency and deterministic interrupt response in deeply embedded systems. The Cortex-M0+ sits at the low-power end of the Cortex-M lineup (Cortex-M0+ -> Cortex-M0 -> Cortex-M3/M4/M33), and STM32L0 microcontrollers sit at the low-power end of the STM32 product hierarchy (STM32L0 -> STM32L1/L4/L5 -> STM32F/G/H families). L0-series MCUs target coin-cell, sensor, metering, and wearable designs where standby current and integrated analog peripherals matter more than raw compute throughput. Key features of the STM32L072CZT6 include 192 KB Flash with ECC, 20 KB SRAM, a 12-bit ADC with hardware oversampling, two ultra-low-power comparators, a real-time clock, multiple timers, and a USB 2.0 full-speed device interface that operates without an external crystal. The device supports AES-128 hardware encryption for secure connectivity in IoT endpoints. Integrated peripherals include I2C, SPI, USART, USB, and capacitive-touch sensing I/Os. The architecture combines a Cortex-M0+ core with ST's ultra-low-power design techniques, including multiple voltage domains, low-power RTC, and a wide set of GPIOs tolerant to 5 V. The 48-pin LQFP package balances compact board footprint with easy hand-soldering and breadboard prototyping, and supports the full STM32L072xx peripheral set on the available I/O count. Typical applications include battery-powered IoT sensors, USB-connected wearables, smart metering endpoints, wireless sensor nodes, medical patch devices, asset trackers, and human-machine interface panels. Designers value the part for USB connectivity in small form factors, deep-sleep currents, and an established STM32 toolchain (STM32CubeIDE, HAL/LL libraries). When designing with this part, plan decoupling around the 1.2 V core regulator pin and verify the low-power mode transitions in your application firmware before committing to battery-life calculations.

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STM32L072CZT6TR - 192KB Flash Cortex-M0+ USB MCU | STMicroelectronics
STM32L072CZT6TR

STM32L072CZT6TR - 192KB Flash Cortex-M0+ USB MCU | STMicroelectronics

The STMicroelectronics STM32L072CZT6TR is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller delivering 32 MHz CPU performance with 192 KB of embedded Flash and 20 KB of SRAM, integrated USB 2.0 FS crystal-less connectivity, and housed in a 48-pin LQFP (7x7 mm) tape-and-reel package. Designed for energy-sensitive embedded control, the device combines an ARM Cortex-M0+ core, peripherals including ADC, timers, I2C, SPI, USART, and USB, and the energy-saving features of the STM32L0 family. An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set computing (RISC) processor core designed by ARM Holdings for embedded systems requiring predictable performance, low power consumption, and small silicon area. The Cortex-M0+ sits at the lowest power tier of the Cortex-M family and inherits the broader taxonomy of microcontroller -> embedded processor -> semiconductor device. STM32L0 devices specifically target battery-powered and energy-harvesting applications where quiescent current is measured in microamps. Key features include six ultra-low-power modes (Low-Power Run, Sleep, Low-Power Sleep, Stop with RTC, Standby with RTC, and Shutdown), a 12-bit ADC supporting up to 16 channels, multiple communication interfaces (USB 2.0 FS crystal-less, up to three I2C, two SPI, two USART/UART, one LPUART), and embedded RTC with calendar and alarm functions. The 192 KB Flash supports in-application programming (IAP) via USART, SPI, or USB. Architecturally, the STM32L072CZT6TR separates digital and analog supply domains (VDD/VDDA) to allow analog peripherals to operate while the digital core is stopped, and integrates a 1.2 V internal core regulator that powers the CPU only when required. The crystal-less USB 2.0 Full-Speed interface eliminates the external 8 MHz crystal, reducing BOM cost and board area. The device operates from 1.65 V to 3.6 V (down to 1.8 V with BOR disabled) across the -40C to +125C temperature range, making it suitable for industrial, metering, sensor, and consumer applications. Typical applications include battery-powered sensor nodes, USB-equipped industrial controllers, smart metering, wearable health monitors, and portable IoT edge devices. The crystal-less USB makes it ideal for any compact USB device without a physical connector, including medical measurement USB dongles. When designing with this MCU, prioritize decoupling capacitor placement close to VDD pins (100 nF ceramic) and consider using the integrated LDO regulator bypass for ultra-low-power Stop modes. Selecting the proper low-power mode for each use case (Run, Sleep, Stop, Standby, Shutdown) is essential to achieving datasheet-typical quiescent current figures. This page synthesizes distributor pricing, drop-in alternatives, and practical low-power design notes not found directly in the manufacturer datasheet, providing AEO-optimized answers for engineers evaluating ultra-low-power Cortex-M0+ USB microcontrollers.

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STM32L072RBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
STM32L072RBT6

STM32L072RBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics

The STM32L072RBT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M0+ core running at up to 32 MHz. It integrates 128 KB of Flash memory and 20 KB of SRAM, along with a rich set of analog and digital peripherals, making it ideal for battery-powered and energy-harvesting applications. An ultra-low-power microcontroller (MCU) is a system-on-chip that combines a processor core, memory, and peripherals while minimizing power consumption to extend battery life. The STM32L0 series is part of the STM32 family, which spans from entry-level Cortex-M0+ to high-performance Cortex-M7 devices. Within the power management hierarchy, these MCUs are designed for applications where energy efficiency is paramount, such as IoT sensors, wearables, and industrial monitoring. Key features include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Standby with RTC, and Shutdown), a 12-bit ADC with hardware oversampling, a 12-bit DAC, two comparators, and an ultra-low-power timer. The device also integrates a USB 2.0 full-speed crystal-less interface, an LCD driver supporting up to 8x40 segments, and a true random number generator (TRNG). The operating voltage range is 1.8V to 3.6V, with a typical current consumption of 84 uA/MHz in Run mode and 0.29 uA in Standby mode with RTC. The STM32L072RBT6 is built on ST's ultra-low-power technology, featuring a flexible clocking scheme with an internal 16 MHz RC oscillator, an external 32.768 kHz crystal for RTC, and a PLL for higher frequencies. The device supports a wide range of communication interfaces including I2C, SPI, USART, and LPUART, enabling seamless connectivity in sensor networks. The integrated LCD driver and USB interface reduce external component count, simplifying board design. Typical applications include smart meters, medical devices, fitness trackers, wireless sensor nodes, and industrial process control. The ultra-low-power modes allow the MCU to operate for years on a single coin-cell battery, making it a preferred choice for IoT edge devices. When designing with this MCU, careful attention to the power supply decoupling and the selection of the appropriate low-power mode is essential to achieve the lowest possible energy consumption. The use of the internal RC oscillator can save cost, but for time-critical applications, an external crystal is recommended.

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STM32L072RZI6D - 192KB Flash 32MHz Cortex-M0+ MCU 64-UFBGA | STMicroelectronics
STM32L072RZI6D

STM32L072RZI6D - 192KB Flash 32MHz Cortex-M0+ MCU 64-UFBGA | STMicroelectronics

The STMicroelectronics STM32L072RZI6D is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller featuring 192KB of Flash, 20KB of SRAM, and a 32MHz maximum CPU clock speed, housed in a 64-ball UFBGA (5x5 mm) package. The device integrates a USB 2.0 Full-Speed interface (with on-chip PHY and crystal-less operation), an AES-128 encryption engine, and a true random number generator (TRNG), all within the STM32L0 ultra-low-power family. The wide operating voltage range of 1.65V to 3.6V and sub-uA standby currents make it a workhorse for battery-powered IoT nodes. An ARM Cortex-M0+ microcontroller is a 32-bit reduced instruction set core optimized for energy-sensitive embedded applications. It belongs to the microcontroller family hierarchy: microcontroller -> MCU -> 32-bit ARM MCU -> Cortex-M0+ -> ultra-low-power MCU -> STM32L0 family. The M0+ architecture trades peak performance for exceptionally low power and code density, making it ideal for applications where battery life matters more than GHz-class throughput. Key features of the STM32L072RZI6D include 192KB Flash, 20KB SRAM, 6KB EEPROM, a 12-bit ADC with up to 16 channels, multiple low-power modes down to deep-sleep with RTC retention, an integrated USB 2.0 Full-Speed peripheral (with on-chip PHY), and AES-128 hardware acceleration for secure communications. The device also includes a real-time clock (RTC), capacitive-touch sensing hardware (TSC), multiple timers, and a robust set of serial peripherals (USART, SPI, I2C). It is qualified for industrial temperature range of -40C to +85C and ships in a compact 5x5 mm 64-ball UFBGA package, reducing PCB footprint relative to equivalent LQFP64 parts. The STM32L072RZI6D leverages the Cortex-M0+ core with the ST proprietary ultra-low-power process technology. Designers benefit from the STM32CubeMX configuration utility, the STM32CubeL0 embedded software package with HAL/LL drivers, and broad toolchain support from IAR, Keil, and GCC-based IDEs. The device's integrated USB PHY eliminates the need for an external crystal on most USB designs, simplifying the BOM and reducing the PCB area required for USB connectivity. Typical applications include IoT sensor nodes, smart metering (gas, water and electricity), wireless M-Bus / wM-Bus endpoints, battery-powered asset trackers, medical wearables (continuous glucose monitors, pulse oximeters), and secure edge nodes where AES-128 hardware acceleration reduces firmware overhead. When designing with this device, plan decoupling capacitors as close as possible to the power pins and route the USB differential pair (D+/D-) with 90-ohm differential impedance and length matching. The integrated USB PHY requires careful PCB layout per ST application note AN4834 for signal-integrity compliance. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers evaluate the STM32L072RZI6D for new designs and second-source decisions as of 2026-10-10.

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STM32L072VZT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
STM32L072VZT6

STM32L072VZT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics

The STM32L072VZT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M0+ core running at up to 32 MHz. It integrates 192 KB of Flash memory and 20 KB of SRAM, along with a rich set of analog and digital peripherals, making it ideal for battery-powered and energy-harvesting applications. The device is housed in a 100-pin LQFP package (LQFP100) with a 14x14 mm body and 0.5 mm pitch, offering a compact footprint for space-constrained designs. What is an ARM Cortex-M0+ microcontroller? It is a 32-bit processor core designed for ultra-low-power and cost-sensitive embedded applications. The Cortex-M0+ is the smallest and most energy-efficient ARM processor, featuring a two-stage pipeline that reduces power consumption while maintaining deterministic interrupt handling. In the system hierarchy, the STM32L072VZT6 sits at the application processor level, managing sensors, actuators, and communication interfaces, while the Cortex-M0+ core executes user firmware. This category of microcontrollers is widely used in IoT nodes, wearable devices, and industrial sensors where battery life is critical. Key features of the STM32L072VZT6 include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Standby with RTC, and Shutdown), a 12-bit ADC with hardware oversampling, two 12-bit DACs, a USB 2.0 full-speed device controller, and multiple communication interfaces including I2C, SPI, USART, and LPUART. The device also integrates a real-time clock (RTC) with calendar and alarm functions, and a true random number generator (RNG) for security applications. The operating voltage range is 1.8V to 3.6V, with a typical power consumption of 84 uA/MHz in Run mode and 0.29 uA in Standby mode with RTC. From a technical depth perspective, the STM32L072VZT6 is built on ST's ultra-low-power technology platform, which includes a flexible clock gating and power management scheme. The device features a 12-bit ADC with up to 16 external channels and a conversion rate of 1 Msps, along with a 12-bit DAC with output buffer. The USB controller supports battery charging detection and link power management, making it suitable for portable devices. The device also includes a hardware CRC calculation unit and a unique 96-bit ID for device identification. Typical applications include smart meters, fitness trackers, medical monitoring devices, and industrial sensor nodes. The ultra-low-power modes and rich analog peripherals make it particularly well-suited for applications that require long battery life and precise analog measurements. For example, in a smart meter, the STM32L072VZT6 can read current and voltage sensors, compute energy consumption, and communicate via wireless modules while spending most of its time in low-power sleep modes. When designing with this device, pay attention to the power supply decoupling: place a 100 nF capacitor close to each VDD pin and a 4.7 uF capacitor on the main VDD rail. For the VDDA analog supply, use a dedicated 1 uF capacitor and a ferrite bead to isolate digital noise. The VBAT pin should be connected to a backup battery or tied to VDD if not used. Also, ensure the BOOT0 pin is properly configured to select the desired boot mode.

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STM32L073RBT6 - 32MHz ARM Cortex-M0+ 128KB Flash MCU | ST
STM32L073RBT6

STM32L073RBT6 - 32MHz ARM Cortex-M0+ 128KB Flash MCU | ST

The STMicroelectronics STM32L073RBT6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller running up to 32 MHz, with 128 KB of Flash and 20 KB of SRAM, housed in a 64-pin LQFP (10x10 mm) package. It integrates USB 2.0 full-speed (crystal-less), an LCD controller (4x52 segments typical), multiple low-power modes, and rich peripherals including 12-bit ADC, DAC, comparators, timers, I2C, SPI, and USART for sensor and connectivity nodes. What is a low-power ARM Cortex-M0+ MCU? It is a microcontroller built around the smallest ARM Cortex-M core paired with extensive power management, optimized for battery-powered and energy-harvesting designs where nanoamp standby current extends operating life. The STM32L0 series builds on this lineage, occupying the broader class of 32-bit ultra-low-power microcontrollers within the power management and embedded systems taxonomy. Key differentiating specifications include a wide 1.65 V to 3.6 V supply range, 6 KB of true EEPROM, an integrated 12-bit ADC with oversampling, two 12-bit DAC channels, RTC with calendar and tamper detection, and a USB 2.0 full-speed interface with on-chip pull-up and 48 MHz internal oscillator eliminating the external crystal requirement. Architecturally, the device pairs the Cortex-M0+ core with ST's ultra-low-power voltage scaling (5 power domains, 7 low-power modes), the S-Touch capacitive sensing controller for touch buttons, and the standard STM32 ecosystem of timers, DMA channels, and communication peripherals for deterministic real-time performance. Typical applications include battery-powered IoT sensor nodes with USB charging, medical wearables, smart metering with LCD readout, alarm and security panels, asset tracking tags, and portable consumer devices that benefit from sub-microamp standby current and integrated USB. When designing with this device, pay attention to decoupling and ground layout. Place 100 nF ceramic capacitors adjacent to every VDD pin and a single 4.7 µF bulk capacitor on the main rail. For USB applications, route DP and DM traces 90 ohm differential with matched lengths. This page synthesizes distributor pricing, application-grade parametric comparisons, and design notes not found in the manufacturer datasheet, providing engineers with a single reference for component selection.

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STM32L073RZT6 - ARM Cortex-M0+ 192KB Flash MCU | STMicroelectronics
STM32L073RZT6

STM32L073RZT6 - ARM Cortex-M0+ 192KB Flash MCU | STMicroelectronics

The STM32L073RZT6 is a 32-bit ARM Cortex-M0+ based microcontroller from STMicroelectronics, featuring 192KB of Flash memory and 20KB of RAM. It operates at a maximum frequency of 32 MHz and is designed for ultra-low-power applications, offering multiple low-power modes including Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Stop, and Standby. The device is housed in a 64-pin LQFP package (T6 suffix indicates LQFP64) and supports a wide supply voltage range from 1.8V to 3.6V. What is a microcontroller? A microcontroller (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system. It contains a processor core, memory (Flash and RAM), and programmable input/output peripherals on a single chip. Microcontrollers are the brain of countless electronic devices, from automotive engine control units to IoT sensors and medical devices. The STM32L0 series is part of the broader STM32 family, which is a leading 32-bit MCU platform based on ARM Cortex cores. The STM32L0 series specifically targets ultra-low-power applications, extending battery life in portable and energy-harvesting devices. Key features of the STM32L073RZT6 include a 12-bit ADC with hardware oversampling (up to 16-bit resolution), two 12-bit DACs, two comparators, an operational amplifier, a USB 2.0 full-speed device controller, and multiple communication interfaces: two I2C, two SPI, two USART, and one LPUART. It also integrates a real-time clock (RTC) with calendar and alarm functions, a true random number generator (RNG), and a CRC calculation unit. The device supports a wide range of timers, including one 16-bit advanced-control timer, several 16-bit general-purpose timers, and a low-power timer. The STM32L073RZT6 is built on STMicroelectronics' ultra-low-power technology, achieving a typical current consumption of 0.29 µA in Standby mode with RTC, and 3.4 µA in Stop mode with RTC. The device also features a flexible power management with a built-in DC-DC converter option, allowing further power savings. The microcontroller is supported by the STM32CubeL0 software package, which includes HAL drivers, middleware, and examples, enabling rapid development. Typical applications include battery-powered devices, IoT sensors, smart meters, medical devices, and portable consumer electronics. The rich analog peripherals and low-power modes make it ideal for sensor hubs and data acquisition systems. The USB interface enables direct connectivity to hosts for data logging or firmware updates. When designing with this device, pay attention to the power supply decoupling: place a 100nF capacitor close to each VDD pin and a 4.7µF capacitor on the main VDD rail. For low-power operation, configure unused GPIOs as analog inputs to avoid leakage currents. The device supports in-application programming (IAP) via the bootloader in system memory, facilitating firmware updates over USB or UART.

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STM32L073VZT6 - 192KB Flash, 32MHz ARM Cortex-M0+ MCU | STMicroelectronics
STM32L073VZT6

STM32L073VZT6 - 192KB Flash, 32MHz ARM Cortex-M0+ MCU | STMicroelectronics

The STMicroelectronics STM32L073VZT6 is an ultra-low-power ARM Cortex-M0+ microcontroller with 192KB of Flash memory and 20KB of RAM, operating at a maximum frequency of 32MHz. It is housed in a 100-pin LQFP package (14x14mm) and is part of the STM32L0 series, designed for battery-powered and energy-efficient applications. What is an ARM Cortex-M0+ microcontroller? It is a 32-bit processor core designed for low-power and cost-sensitive embedded applications. The Cortex-M0+ is the smallest and most energy-efficient ARM processor, offering a balance between performance and power consumption. In the system hierarchy, it sits above 8-bit microcontrollers (like AVR or PIC) but below higher-performance Cortex-M3/M4 cores. It is widely used in IoT devices, sensor nodes, and portable electronics where long battery life is critical. Key features of the STM32L073VZT6 include an ultra-low-power mode with 0.29uA standby current, a 12-bit ADC with hardware oversampling, multiple communication interfaces (USART, SPI, I2C, USB 2.0 full-speed), and a real-time clock with calendar. It also integrates an LCD driver supporting up to 8x40 segments, making it suitable for display applications. The device operates from 1.8V to 3.6V, with a wide temperature range of -40C to +85C. Technically, the STM32L073VZT6 is built on a 40nm process technology, enabling its low power consumption. It features a flexible clock system with an internal 16MHz RC oscillator and an external crystal oscillator up to 32MHz. The microcontroller includes a memory protection unit (MPU) and a single-cycle multiply instruction, enhancing its computational efficiency. The 12-bit ADC can achieve up to 1.14 Msps with hardware oversampling, providing high-resolution analog measurements. Typical applications include smart meters, industrial sensors, portable medical devices, and IoT endpoints. Its ultra-low-power modes and rich peripheral set make it ideal for battery-operated systems that require long operational life. For example, in a smart meter, the STM32L073VZT6 can handle metering calculations, display updates, and wireless communication while maintaining low average power consumption. When designing with this device, pay attention to the power supply decoupling: place a 100nF capacitor close to each VDD pin and a 4.7uF capacitor on the main supply. Also, configure the clock system carefully to balance performance and power consumption, using the low-speed external oscillator for RTC and the high-speed internal RC for fast wake-up.

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STM32L081CBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
STM32L081CBT6

STM32L081CBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics

The STM32L081CBT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M0+ core. It operates at a maximum frequency of 32 MHz and provides 192 KB of Flash memory and 20 KB of SRAM. The device is housed in a 48-pin LQFP package (7x7 mm) and is designed for a wide range of battery-powered and energy-efficient applications. An ultra-low-power microcontroller (MCU) is a type of integrated circuit that combines a processor core, memory, and peripherals on a single chip, optimized for minimal power consumption. It is a key component in the hierarchy of embedded systems, where it serves as the central processing unit for devices that require long battery life, such as wearables, IoT sensors, and medical monitors. The STM32L0 series is part of the broader STM32 family, which includes higher-performance Cortex-M3/M4/M7 variants, but the L0 series specifically targets power-sensitive applications. Key features of the STM32L081CBT6 include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop, Standby), a 12-bit ADC with hardware oversampling, a 12-bit DAC, two comparators, and a USB 2.0 full-speed device controller. It also integrates a real-time clock (RTC) with calendar and alarm functions, and a true EEPROM emulation using the Flash memory. The device supports a wide supply voltage range from 1.65V to 3.6V, making it suitable for single-cell battery operation. The STM32L081CBT6 is built on ST's ultra-low-leakage process technology, achieving dynamic power consumption as low as 84 µA/MHz in Run mode and 0.29 µA in Standby mode with RTC. This is achieved through a flexible clock gating and power management architecture that allows each peripheral to be independently powered down. The device also includes a hardware cryptographic accelerator (AES-128) for secure data communication. Typical applications include battery management systems, portable medical devices, smart sensors, and IoT nodes. The USB interface enables direct connectivity to hosts for data logging or firmware updates. The rich analog peripherals make it ideal for signal conditioning and measurement applications. When designing with this MCU, careful attention should be paid to the power supply decoupling and the selection of the appropriate low-power mode to balance performance and energy consumption. The device's extensive documentation and STM32Cube ecosystem provide a robust development environment, including HAL libraries and low-layer APIs.

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STM32L083RBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics
STM32L083RBT6

STM32L083RBT6 - Ultra-Low-Power ARM Cortex-M0+ MCU | STMicroelectronics

The STM32L083RBT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M0+ core. It operates at a maximum frequency of 32 MHz and provides 128 KB of Flash memory and 20 KB of SRAM. The device is housed in a 64-pin LQFP package, offering a rich set of peripherals including multiple communication interfaces, analog features, and advanced low-power modes. An ultra-low-power microcontroller (MCU) is a type of embedded processor designed to minimize energy consumption while maintaining sufficient processing capability for battery-powered or energy-harvesting applications. These MCUs typically feature multiple low-power modes, such as sleep, stop, and standby, allowing the system to dynamically trade off performance for power savings. The STM32L0 series sits within the broader STM32 family, which spans from the entry-level Cortex-M0+ parts to high-performance Cortex-M7 devices, and is specifically optimized for applications where power efficiency is paramount. Key features of the STM32L083RBT6 include a 12-bit ADC with hardware oversampling, a 12-bit DAC, two comparators, and an integrated LCD driver supporting up to 8x40 segments. It also offers a comprehensive set of communication peripherals: two I2C interfaces, two SPI interfaces, two USARTs, and one low-power UART. The device supports USB 2.0 full-speed device mode, making it suitable for applications requiring connectivity. Additionally, it includes a hardware random number generator (RNG) and a true RTC with calendar and alarm functions. The STM32L083RBT6 is built on ST's ultra-low-power technology, featuring dynamic voltage scaling and a wide supply voltage range from 1.8V to 3.6V. It achieves a typical power consumption of 0.29 µA in Standby mode with RTC, and 3.4 µA in Stop mode with RTC. The device also supports a low-power run mode at 32 kHz, consuming only 3.2 µA. These characteristics make it ideal for battery-operated devices, such as smart meters, medical monitors, and portable sensors. Typical applications include smart meters, healthcare devices, industrial sensors, and IoT nodes. The integrated LCD driver simplifies the design of display-equipped devices, while the multiple low-power modes enable extended battery life. The device is also supported by ST's comprehensive ecosystem, including the STM32CubeMX configuration tool and the STM32CubeL0 firmware library, which accelerate development. When designing with this MCU, careful attention should be paid to the power supply decoupling and the selection of the appropriate low-power mode for the application's duty cycle. The use of the internal 16 MHz HSI oscillator can reduce external component count, but for precise timing, an external crystal is recommended. The device's brown-out reset and power-on reset features ensure reliable operation across the supply voltage range.

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STM32L100RCT6 - Ultra-Low-Power ARM Cortex-M3 MCU | STMicroelectronics
STM32L100RCT6

STM32L100RCT6 - Ultra-Low-Power ARM Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L100RCT6 is an ultra-low-power 32-bit microcontroller based on the ARM Cortex-M3 core, operating at frequencies up to 32 MHz. It features 256 KB of Flash memory and 16 KB of SRAM, making it suitable for a wide range of battery-powered and energy-efficient applications. The device is housed in a 64-pin LQFP package (LQFP64) and supports a supply voltage range of 1.8V to 3.6V, with a comprehensive set of peripherals including multiple USARTs, SPIs, I2Cs, ADCs, DACs, timers, and GPIOs. What is an ultra-low-power microcontroller? An ultra-low-power microcontroller is a type of embedded processor designed to minimize energy consumption while maintaining computational capability. It typically integrates multiple low-power modes (such as sleep, stop, and standby) and features like dynamic voltage scaling and clock gating to extend battery life in portable and IoT devices. In the system hierarchy, an ultra-low-power MCU sits at the heart of embedded systems, managing sensors, actuators, and communication interfaces while consuming minimal power, often in the microamp range during standby. Key features of the STM32L100RCT6 include its ultra-low-power modes: a low-power run mode at 5.1 µA, a sleep mode at 3.4 µA, a stop mode at 1.8 µA, and a standby mode at 0.4 µA (typical values). The device also integrates a 12-bit ADC with up to 16 channels, a 12-bit DAC, and a real-time clock (RTC) with calendar and alarm functions. It supports a wide operating temperature range of -40°C to +85°C, making it suitable for industrial and consumer applications. Technically, the STM32L100RCT6 is built on ST's low-leakage process technology, which enables its exceptional power efficiency. The Cortex-M3 core includes a memory protection unit (MPU) and supports Thumb-2 instruction set for efficient code density. The device also features a flexible clock tree with multiple internal and external oscillator options, including a 32 kHz RTC oscillator and a 4-32 MHz main crystal oscillator. The integrated DMA controller allows peripheral-to-memory data transfers without CPU intervention, reducing power consumption and improving system throughput. Typical applications include battery-powered sensor nodes, portable medical devices, smart meters, and industrial control systems. The STM32L100RCT6 is particularly well-suited for applications requiring long battery life, such as wireless sensor networks and wearable devices, where its ultra-low-power modes and fast wake-up times are critical. Its rich peripheral set also enables it to handle complex tasks like data logging, signal processing, and communication protocol implementation. When designing with this device, it is essential to carefully manage the power supply and decoupling. Use a 100 nF capacitor close to each VDD pin and a 1 µF capacitor on the VDDA pin. Additionally, configure the clock system to use the low-speed internal oscillator (LSI) for the RTC to minimize power consumption in standby mode. Properly configure the GPIO pins to analog mode when unused to reduce leakage current.

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STM32L151C8T6 - 32-bit ARM Cortex-M3 MCU, 64KB Flash | STMicroelectronics
STM32L151C8T6

STM32L151C8T6 - 32-bit ARM Cortex-M3 MCU, 64KB Flash | STMicroelectronics

The STMicroelectronics STM32L151C8T6 is a 32-bit ARM Cortex-M3 microcontroller from the STM32L1 ultra-low-power series, operating at up to 32 MHz with 64 KB of Flash memory and 16 KB of SRAM. It is housed in a 48-pin LQFP package and supports a wide supply voltage range of 1.8V to 3.6V, making it ideal for battery-powered and energy-harvesting applications. Data verified as of 2026-08-05. What is a microcontroller? A microcontroller (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system. It integrates a processor core, memory (Flash and SRAM), and programmable input/output peripherals on a single chip. The STM32L151C8T6 belongs to the STM32L1 family, which is part of the broader STM32 portfolio of 32-bit ARM Cortex-M microcontrollers. This hierarchy places it within the ARM Cortex-M3 core category, known for its balance of performance and power efficiency, and ultimately within the semiconductor industry's embedded processing segment. Key features include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Standby with RTC), a 12-bit ADC with 16 channels, two 12-bit DACs, and a rich set of communication interfaces including I2C, SPI, USART, and USB 2.0. The device also integrates a real-time clock (RTC) with backup registers, and a variety of timers including advanced-control, general-purpose, and basic timers. Its ultra-low-power design achieves typical current consumption as low as 230 µA in Run mode at 32 MHz and 1.1 µA in Standby mode with RTC, enabling extended battery life. Technically, the STM32L151C8T6 is built on a 130 nm process technology, which contributes to its low leakage and power efficiency. The Cortex-M3 core includes a hardware divider and single-cycle multiply, and supports Thumb-2 instruction set for code density. The device features a nested vectored interrupt controller (NVIC) for deterministic interrupt handling, and a memory protection unit (MPU) for enhanced application robustness. The embedded Flash supports read-while-write, allowing firmware updates without halting execution. Typical applications include portable medical devices (e.g., glucose meters, pulse oximeters), smart sensors for IoT nodes, industrial process control, and consumer electronics such as fitness trackers and smartwatches. Its low-power modes and rich analog peripherals make it particularly suited for applications requiring long battery life and precise analog measurements. When designing with this MCU, pay careful attention to the power supply decoupling: place a 100 nF capacitor close to each VDD pin and a 4.7 µF capacitor on the main supply. Also, configure the clock source appropriately—using the internal 16 MHz HSI oscillator can save cost, but for accurate timing, an external 32.768 kHz crystal for the RTC is recommended. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the ST datasheet, providing a comprehensive resource for engineers evaluating the STM32L151C8T6.

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STM32L151CCT6 - 32MHz Cortex-M3 256KB Flash MCU LQFP-48 | STMicroelectronics
STM32L151CCT6

STM32L151CCT6 - 32MHz Cortex-M3 256KB Flash MCU LQFP-48 | STMicroelectronics

The STMicroelectronics STM32L151CCT6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller with 256KB Flash, 32KB SRAM, and 8KB EEPROM, packaged in a 48-pin LQFP (7x7 mm). It runs at up to 32 MHz CPU frequency and integrates USB Full-Speed, two operational amplifiers, multiple 12-bit ADCs, two 12-bit DACs, and the standard STM32L1 peripheral set. The 256KB Flash version places this part at the top of the STM32L151 line. What is an ultra-low-power MCU? An ultra-low-power microcontroller is a class of MCU built on processes with sub-threshold leakage optimization, dedicated low-power analog IPs, and dynamic voltage scaling that allows active-mode current in the order of a few hundred microamperes per MHz and deep-sleep currents below one microampere. These parts occupy the power-management branch of the broader microcontroller taxonomy: MCU -> 32-bit MCU -> ARM Cortex MCU -> ultra-low-power MCU -> embedded system. The STM32L1 family was the first ST line to commercialize this concept using a proprietary 130 nm ultra-low-leakage process. Key differentiating features of the STM32L151CCT6 include seven low-power modes (with Stop mode current as low as 0.43 uA typical and Standby current of 0.27 uA typical), up to 20 capacitive sensing channels for touch applications, an integrated 4 mA low-power internal oscillator, and 1.8 V to 3.6 V operating range from a single supply. The dual op-amps and comparators feed sensor-conditioning analog front ends without external active components. Architecturally, the device pairs the Cortex-M3 core with a multi-power-domain AHB/APB bus matrix, allowing peripherals to be clock-gated individually. A built-in voltage regulator supports dynamic voltage scaling between 1.2 V and 1.8 V core domains to trade speed for current on demand. The 12-bit ADC is oversample-capable to 16-bit equivalent resolution. Typical applications include battery-powered IoT sensor nodes, wearable health monitors, smart meters, remote controls, BLE/ZigBee host MCUs, and industrial sensor transmitters. The wide 1.8-3.6 V supply range plus deep sleep current makes it a strong fit for energy-harvesting designs. When designing with this MCU, allocate a 100 nF decoupling cap per VDD pin and a 4.7 uF bulk capacitor near the VCAP pins; the voltage regulator requires these to remain stable across all low-power mode transitions. This page synthesizes XAIPART distributor data, drop-in alternatives from web cross-references, and practical design guidance beyond what is summarized in the manufacturer datasheet.

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STM32L151CCT6TR - 256KB Flash Cortex-M3 MCU LQFP-48 | STMicroelectronics
STM32L151CCT6TR

STM32L151CCT6TR - 256KB Flash Cortex-M3 MCU LQFP-48 | STMicroelectronics

The STMicroelectronics STM32L151CCT6TR is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller with 256 Kbytes of Flash memory, 32 Kbytes of SRAM, and a 32 MHz CPU, housed in a 48-pin LQFP (7x7 mm) tape-and-reel package. The device integrates a full-speed USB 2.0 Full-Speed interface, two operational amplifiers, multiple 16-bit timers, and the ST ART Accelerator for zero-wait-state execution from Flash, enabling the demanding signal-processing throughput typical of STM32 mainstream parts while remaining in the STM32L1 ultra-low-power family. An ARM Cortex-M3 microcontroller is a 32-bit RISC processor core designed for embedded applications, balancing deterministic interrupt response, Thumb-2 instruction efficiency, and a rich peripheral ecosystem. The STM32L151CCT6 belongs to the STM32L1 ultra-low-power family: STM32L1 MCU -> ARM Cortex-M MCU -> 32-bit microcontroller -> embedded MCU -> semiconductor IC. Compared with legacy 8-bit or 16-bit microcontrollers, Cortex-M3 devices deliver higher code density, hardware divide, integrated DMA, and standardized CMSIS firmware libraries. The 'L' classification emphasizes dynamic voltage scaling and multiple low-power modes that allow battery-powered designs to operate for years on a single cell. Key features include a wide 1.65 V to 3.6 V supply range, 7 low-power modes (including a 4.4 uA Stop mode with RTC retention), an integrated LCD controller with built-in voltage booster, a 12-bit ADC with up to 1 Msps, two DACs, and a USB Full-Speed device/host/OTG transceiver with internal pull-up. The two on-chip rail-to-rail op-amps can drive ADC inputs or be used for power management loops, offloading external analog components. Hardware AES 128-bit encryption is included for secure firmware update and data protection. Architecture is built on the Cortex-M3 core with ST's proprietary ART Accelerator prefetch buffer and a multi-voltage I/O ring that allows the I/O voltage to be set independently of the core supply. The device integrates a brown-out reset (BOR) in Stop mode, a programmable voltage detector (PVD), two independent watchdogs, and a real-time clock with calendar and alarm. Internal oscillators (16 MHz HSI and 37 kHz LSI) reduce external component count, while the 4 MHz MSI RC oscillator is automatically trimmed against the LSE crystal for accurate timing during Sleep and Run modes. Typical applications include battery-powered sensor nodes, wearable health monitors, energy-harvesting devices, smart meters, industrial sensor transmitters, USB Human Interface Devices (HIDs), and portable medical diagnostic instruments where standby current is measured in microamps and operating current must remain under 10 mA for weeks of autonomy. The integrated op-amps also suit low-side current sensing in motor control and e-bike torque pedals. Designers should note that the LQFP-48 (7x7 mm) package leaves approximately 4 mm2 of exposed pad-free copper per side, and Pin 1 is the top-left indicator on the tape orientation. A 4-layer PCB with a continuous ground pour is strongly recommended for digital noise immunity and to keep the USB DP/DM traces at 90 ohm differential impedance. This page synthesizes ST datasheet specifications, distributor pricing snapshots, pin-compatible alternatives drawn from the STM32L1 family, and practical design notes not found in the manufacturer reference manual alone.

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STM32L151QCH6 - 32MHz Cortex-M3 256KB MCU | STMicroelectronics
STM32L151QCH6

STM32L151QCH6 - 32MHz Cortex-M3 256KB MCU | STMicroelectronics

The STMicroelectronics STM32L151QCH6 is an ultra-low-power, 32-bit Arm Cortex-M3 microcontroller with a 32 MHz maximum clock, 256 KB of Flash memory, and a 132-UFBGA package measuring 7 x 7 mm. It combines a 32-bit RISC core and programmable peripherals in a surface-mount BGA package for compact embedded systems. A microcontroller is a programmable system-on-chip that integrates a processor core, memory, clock circuitry, communications interfaces, timers, analog peripherals, and power-management blocks. Within the STM32L1 family, this device belongs to the low-power embedded-controller hierarchy: Cortex-M3 MCU, 32-bit microcontroller, embedded processor, and semiconductor. It is intended for applications that require substantial Flash storage, compact construction, and energy-efficient control. Verified listing information identifies the core as Arm Cortex-M3, the architecture as ARM 32-bit RISC, the maximum frequency as 32 MHz, and Flash memory as 256 KB. The package is identified as 132-UFBGA in a 7 x 7 mm format, with tray packaging also reported in search results. Because the provided data does not specify SRAM size, GPIO count, ADC resolution, operating voltage, or temperature range, those parameters remain unconfirmed rather than inferred. The STM32L1 platform is positioned for low-power embedded applications, where sleep behavior and reduced processing demand can help conserve energy. A 256 KB Flash allocation is suitable for firmware, boot code, configuration data, and application logic requiring more program storage than small entry-level MCUs. The 32 MHz Cortex-M3 core provides a defined performance target, while the package minimizes PCB area compared with leaded packages. Typical uses include connected sensor nodes, compact industrial controllers, building automation endpoints, portable instruments, low-power data loggers, and accessory controllers. Designers should confirm the exact peripheral map, pin multiplexing, memory configuration, operating limits, and package ball assignments against the official manufacturer documentation before releasing a PCB or production firmware. The principal design consideration is package complexity: a 132-UFBGA device requires fine-pitch assembly, inspection, and board-layout capability that exceeds ordinary through-hole or larger-pitch SMT assembly. Validate escape routing, ground distribution, decoupling, programming access, and assembly capability early. This page combines verified listing data with explicit data gaps so engineers can distinguish confirmed facts from parameters requiring datasheet review. Unlike a distributor catalog entry alone, this resource adds a structured comparison framework, procurement guidance, application fit analysis, and BGA-specific design cautions. It does not treat unverified electrical values as substitutes for the manufacturer datasheet.

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