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STM32L071KBU3 - 32MHz Cortex-M0+ 128KB MCU | STMicroelectronics
STM32L071KBU3

STM32L071KBU3 - 32MHz Cortex-M0+ 128KB MCU | STMicroelectronics

The STMicroelectronics STM32L071KBU3 is an ultra-low-power 32-bit Arm Cortex-M0+ microcontroller operating at 32 MHz, with 128 KB of flash memory in a 32-pin UFQFPN package measuring 5 x 5 mm. It belongs to the STM32L0 access-line family and is designed for compact, energy-conscious embedded systems. A microcontroller is a programmable semiconductor that integrates a CPU core, memory, peripherals, and interfaces onto one package. The STM32L071KBU3 combines a 32-bit RISC processor with 128 KB of flash and seven DMA channels, making it suitable for connected sensors, compact control modules, industrial equipment, medical devices, and low-power consumer products. Its Cortex-M0+ architecture supports efficient embedded control while keeping implementation complexity relatively low. The device operates with an Arm Cortex-M0+ core at 32 MHz and includes eight timers according to the product listing. Seven DMA channels can move data between peripherals and memory, reducing CPU involvement in routine transfers. The 128 KB flash configuration provides room for application code, configuration data, and firmware updates in space-constrained designs. The STM32L071KBU3 is packaged as a 32-pin UFQFPN with a 5 x 5 mm body. Its small footprint supports high-density PCB layouts, although exposed-pad thermal design and assembly process controls remain important. The part is identified as an ultra-low-power microcontroller, making it especially relevant to designs that spend substantial operating time in low-power states. Typical uses include environmental sensors, IoT endpoints, compact motor-control boards, wearable accessories, metering equipment, and industrial automation modules. For designs where footprint, processing speed, memory capacity, and low-power operation are the primary requirements, the STM32L071KBU3 provides a focused MCU platform without the resource demands of higher-performance Cortex-M devices. Before layout, use the manufacturer pin-description table and package drawing to assign power, ground, clock, debug, and I/O connections. Confirm the device variant, pin multiplexing, decoupling requirements, and exposed-pad connection against the STM32L071KB datasheet. This page summarizes the confirmed core, memory, package, and peripheral information while distinguishing the 128 KB target from the related 192 KB variant.

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STM32L071KBU6 - 32MHz Cortex-M0+ 128KB MCU | STMicroelectronics
STM32L071KBU6

STM32L071KBU6 - 32MHz Cortex-M0+ 128KB MCU | STMicroelectronics

The STMicroelectronics STM32L071KBU6 is an ultra-low-power 32-bit Arm Cortex-M0+ microcontroller with a 32 MHz operating frequency, 128 KB of Flash memory, and 20 KB of SRAM, housed in a 32-pin UFQFPN package measuring 5 mm by 5 mm. An ultra-low-power microcontroller is designed to balance processing capability with minimum energy consumption during active operation and low-power standby. The STM32L0 series combines a compact Arm Cortex-M0+ core, embedded Flash, SRAM, communication peripherals, and low-power features in a small package. This hierarchy places the device between a general-purpose embedded processor and a highly integrated low-power system-on-chip, making it suitable for compact control, sensing, and communications products. The STM32L071KBU6 operates from a 1.65 V to 3.6 V supply, runs at up to 32 MHz, and provides 128 KB of Flash for firmware and data. Its 32-pin UFQFPN package supports a compact surface-mount footprint, while the available 20 KB of SRAM provides working memory for protocol stacks, sensor handling, and control routines. The device is identified as an STM32L0-series microcontroller with an Arm Cortex-M0+ 32-bit RISC core. The product belongs to STMicroelectronics' STM32L071KB access-line family, where the “access” designation identifies an entry-level yet broadly capable ultra-low-power MCU. The architecture is suitable for designs that require deterministic embedded control without the memory capacity or processing performance of a higher STM32 series. Its low operating-voltage range is particularly appropriate for battery-powered equipment operating from regulated low-voltage rails. Typical applications include compact sensor nodes, low-power wireless peripherals, industrial monitoring devices, portable measurement instruments, home-automation controllers, and wearable accessories. In each case, the MCU can execute control logic and manage low-speed peripheral communication while retaining a compact footprint. Designers should allocate board area for decoupling and confirm the exposed-pad thermal and electrical requirements in the manufacturer package documentation. When designing the PCB, place the device's input and output decoupling capacitors close to their corresponding supply pins and follow the recommended land pattern for the 32-pin UFQFPN package. The exposed pad requires the correct solder and thermal strategy; it is not an optional connection. Confirm peripheral pin assignments, alternate functions, clock configuration, and low-power mode requirements against the manufacturer datasheet before finalizing the schematic. This product page combines core device specifications, package information, application guidance, and an honest assessment of drop-in replacement options. Because direct substitute data is limited, alternatives are included only when the package and principal operating characteristics can be supported, avoiding a padded list of electrically unsuitable replacements.

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STM32L071VZT6 - 32MHz Cortex-M0+ 192KB MCU | STMicroelectronics
STM32L071VZT6

STM32L071VZT6 - 32MHz Cortex-M0+ 192KB MCU | STMicroelectronics

The STMicroelectronics STM32L071VZT6 is an ultra-low-power 32-bit microcontroller with a 32 MHz Arm Cortex-M0+ core, 192 KB of Flash memory, and a 3 V supply rating in a 100-lead LQFP 14 x 14 mm package. It belongs to the STM32L071 access-line family and is designed for compact, low-power embedded systems requiring substantial Flash storage and a broad set of general-purpose peripherals. An ultra-low-power microcontroller is a semiconductor designed to minimize energy consumption during active operation, sleep, and standby states. The STM32L071 series sits within STMicroelectronics' STM32L0 product hierarchy: low-power microcontroller, 32-bit embedded MCU, Arm Cortex-M0+ processor, and general-purpose semiconductor. This positioning makes it suitable for battery-powered sensors, portable measurement equipment, industrial controllers, and connected products that must balance processing capability with energy efficiency. The three headline attributes of the STM32L071VZT6 are its 32 MHz operating frequency, 192 KB of Flash memory, and 100-lead LQFP construction. According to the STMicroelectronics STM32L071VZ product page and distributor listings, the device uses an Arm Cortex-M0+ core operating at 32 MHz and provides 192 KB of Flash organized as 192K x 8. The listed 100-LQFP package offers a large pin count for designs that need more external connectivity than smaller 48- or 64-lead packages provide. The STM32L0 family architecture supports efficient embedded control while retaining a conventional peripheral and GPIO-oriented design. STMicroelectronics identifies the STM32L071VZ as part of its ultra-low-power access line, indicating a balance between performance, memory, and energy-conscious operation. The Cortex-M0+ instruction set is appropriate for control loops, protocol handling, data acquisition, and supervisory tasks that do not require the compute performance of an Arm Cortex-M4 or M7 core. Typical uses include compact environmental monitors, low-power sensor nodes, industrial sensing modules, building-access controls, wearable-adjacent accessories, and battery-operated instruments. A network interface such as the LAN8720A-CP Ethernet PHY can be paired with the MCU when wired connectivity is required, while PCA9536DR-style digital expanders can add general-purpose I/O. Firmware and software configuration determine the final application, so all peripheral availability and operating limits must be confirmed in the manufacturer datasheet before design release. For PCB implementation, the 100-lead LQFP package requires a fine-pitch land pattern, careful decoupling near each supply pin, and adequate via-in-pad or fan-out routing beneath the device. Designers should confirm the exact pin multiplexing, debug-pad requirements, and decoupling recommendations against the STMicroelectronics datasheet rather than relying on a generic LQFP footprint library. This page consolidates the verified distributor specifications, manufacturer product information, family-level alternatives, and practical design considerations for STM32L071VZT6 evaluation. It also distinguishes verified parameters from unresolved details so procurement and engineering teams can assess supply, footprint, and firmware implications before committing to the design.

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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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STM32L072KBU6 - 32MHz Cortex-M0+ USB MCU | STMicroelectronics
STM32L072KBU6

STM32L072KBU6 - 32MHz Cortex-M0+ USB MCU | STMicroelectronics

STMicroelectronics STM32L072KBU6 is an ultra-low-power 32-bit Arm Cortex-M0+ microcontroller with a 32 MHz CPU, 128 KB of Flash memory, 20 KB of SRAM, and USB 2.0 connectivity in a 32-pin UFQFPN package measuring 5 mm by 5 mm. The device combines an efficient embedded microcontroller core with analog, timing, watchdog, and communications peripherals for compact, low-energy embedded systems. An ultra-low-power microcontroller is an integrated semiconductor that executes embedded software while minimizing energy consumption during active operation and low-power standby. The STM32L0 product family belongs to the broader hierarchy of 32-bit microcontrollers, embedded processors, and semiconductor devices. Its low-power-oriented architecture makes it suitable for systems that must operate from limited energy budgets while still supporting firmware updates, data acquisition, communications, and real-time control. Key features include a 32 MHz Arm Cortex-M0+ core, 128 KB of Flash, and 20 KB of SRAM. The analog subsystem provides one 12-bit ADC with hardware oversampling, two DAC channels, and two ultra-low-power comparators. Timing and supervisory resources include four general-purpose 16-bit timers, two basic timers, one low-power timer, one RTC, one SysTick timebase, and two watchdogs. USB 2.0 crystal-less connectivity simplifies designs that need USB device communication without a separate crystal. The STM32L072xx architecture integrates connectivity and analog functions on a single low-power MCU. Hardware oversampling improves ADC data acquisition by processing multiple conversion samples internally, while the RTC and low-power timer support periodic events that can wake the system. The independent and window watchdog functions help detect lockups and unexpected operating conditions. Crystal-less USB operation can reduce board-level component requirements, although firmware, oscillator configuration, and signal-integrity validation remain essential. Typical applications include USB-connected sensor nodes, compact industrial data loggers, wearable accessories, battery-powered measurement instruments, low-power control panels, and USB-to-serial or configuration adapters. The 32-pin 5 mm by 5 mm package supports space-constrained products, while the combination of USB, ADC, DAC, comparators, timers, and RTC reduces the number of separate discrete components required in a typical control or measurement design. Designers should verify supply-voltage limits, USB transceiver requirements, clocking, and low-power mode transitions against the manufacturer datasheet before layout release. Place decoupling capacitors close to the supply pins, maintain the required USB data-routing geometry, and confirm exposed-pad soldering and thermal conditions. Firmware should also exercise watchdog, reset, and sleep-mode behavior because low-power system correctness depends on both electrical design and peripheral configuration. This page consolidates the manufacturer device specifications with application guidance, strict same-package alternatives, and design-oriented comparisons. It is intended to help engineers evaluate STM32L072KBU6 for low-power embedded designs without overlooking USB connectivity, analog-resource constraints, memory requirements, or package-level implementation details.

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STM32L072KBU7 - 32MHz Cortex-M0+ 128KB Flash | ST
STM32L072KBU7

STM32L072KBU7 - 32MHz Cortex-M0+ 128KB Flash | ST

The STMicroelectronics STM32L072KBU7 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller with a 32 MHz maximum CPU frequency, 128 KB of flash memory, and USB 2.0 crystal-less connectivity in a 32-pin UFQFPN package. It combines an energy-efficient embedded design with a compact 5 mm × 5 mm footprint for space-constrained embedded products. An ultra-low-power microcontroller is an integrated circuit optimized to minimize energy consumption during active operation, sleep, standby, and wake-up transitions. The STM32L0 Series belongs to the hierarchy microcontroller → 32-bit RISC microcontroller → ARM Cortex-M0+ microcontroller → ultra-low-power embedded MCU. This makes it suitable for battery-operated sensors, portable measurement equipment, connected accessories, and industrial devices that spend most of their operating time in a low-power state. The verified configuration includes a 32 MHz ARM Cortex-M0+ core, 128 KB of flash memory, USB 2.0 crystal-less operation, and operation from 2.5 V or 3.3 V supply levels. The microcontroller is identified in a 32-UFQFPN 5 mm × 5 mm package with an exposed pad. Its 128 KB program memory provides room for application firmware, USB device firmware, communication stacks, and field-upgrade routines without requiring external program memory. The STM32L072KBU7 is based on the STM32L072KB device family. STMicroelectronics describes the STM32L072xx line as combining ultra-low-power behavior with USB 2.0 crystal-less connectivity, allowing USB clock recovery without a discrete crystal when the board budget and clock-tolerance requirements permit. Because the supplied data does not enumerate RAM capacity, GPIO count, temperature limits, or individual peripheral ratings, those values are marked as data needed rather than inferred. Typical uses include USB-connected sensor nodes, compact data loggers, low-energy industrial monitors, firmware-update gateways, and handheld measurement instruments. The compact package also suits USB accessories and embedded systems where board area is constrained. Firmware can use the USB interface for enumeration and data transfer while retaining the Cortex-M0+ ecosystem of development tools, peripheral libraries, and application support. Designers should confirm the exact pin mapping, exposed-pad connection, decoupling requirements, and low-power current budgets against the STM32L072KB manufacturer documentation before layout release. The provided distributor summaries do not expose complete electrical or thermal tables, so no ADC accuracy, temperature range, or current-consumption value is asserted here. The exposed thermal pad should be evaluated as a potential ground and heat-spreading connection according to the manufacturer's land-pattern guidance. This page consolidates verified distributor specifications, same-family drop-in candidates, application guidance, and design considerations that are not presented together on a typical distributor listing. Because no verified cross-brand pin-compatible substitute was identified in the supplied cross-reference results, the alternatives are limited to documented STM32L0 family variants rather than padding the list with mechanically similar but electrically different devices.

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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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STM32L072RZT6 - 32MHz Cortex-M0+ 192KB Flash MCU | STMicroelectronics
STM32L072RZT6

STM32L072RZT6 - 32MHz Cortex-M0+ 192KB Flash MCU | STMicroelectronics

The STMicroelectronics STM32L072RZT6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller with a 32 MHz maximum CPU frequency, 192 KB of Flash memory, and a 64-LQFP 10 x 10 mm package. It belongs to the STM32L0 low-power microcontroller family and is designed for embedded designs requiring low energy consumption, USB connectivity, and a compact surface-mount footprint. An ultra-low-power microcontroller is a semiconductor device intended for battery-operated or energy-constrained embedded products. The STM32L0 family combines a low-power Arm Cortex-M0+ processor core with embedded Flash, SRAM, peripheral interfaces, and low-power operating modes. This places the MCU within the hierarchy of microcontroller, embedded processor, semiconductor, and system-on-chip design categories. Key device attributes include a 32 MHz Arm Cortex-M0+ core, 192 KB Flash, USB 2.0 crystal-less connectivity support, and a 64-LQFP package. The 192 KB Flash provides embedded firmware storage, while the USB capability supports connected peripheral, data-logging, and configuration applications. The LQFP package offers 64 accessible leads and is suitable for surface-mount PCB assembly. The STM32L072RZT6 is positioned for designs where low-power operation and USB connectivity are more important than high analog integration or high-speed digital processing. Its Arm Cortex-M0+ architecture is suitable for firmware execution, peripheral control, communications, and basic signal handling. Exact RAM size, supply-voltage limits, GPIO configuration, and peripheral current consumption require confirmation in the manufacturer datasheet before final schematic design. Typical applications include USB-connected sensors, compact data loggers, industrial control modules, battery-powered instruments, and wearable or portable measurement devices. In these systems, the MCU can manage low-power acquisition, device configuration, and USB data transfer while reducing the overall system power budget. PCB planning should reserve the 64-LQFP footprint, connect the required power and ground pins according to the manufacturer reference schematic, and route USB data lines as a controlled-impedance differential pair. Confirm the exact pin assignments, decoupling requirements, BOOT configuration, clock options, and exposed programming or debug connections in the manufacturer pinout and application documentation. This page combines the manufacturer product identity, package and memory details, search-specific sourcing questions, and practical replacement considerations for engineers evaluating the STM32L072RZT6. Because a true cross-manufacturer pin-to-pin replacement is uncommon in this device class, alternative listings should be screened carefully for package, memory, USB, peripheral, firmware, and lifecycle compatibility before schematic approval.

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STM32L072VBT6 - 32MHz Cortex-M0+ MCU | STMicroelectronics
STM32L072VBT6

STM32L072VBT6 - 32MHz Cortex-M0+ MCU | STMicroelectronics

The STMicroelectronics STM32L072VBT6 is an ultra-low-power 32-bit ARM Cortex-M0+ microcontroller rated for operation up to 32 MHz, with 128 KB of Flash memory and USB 2.0 connectivity in a 100-pin LQFP 14 x 14 mm package. The device operates from a 1.65 V to 3.6 V supply range, making it suitable for compact embedded products that require low power consumption, USB connectivity, and broad peripheral integration. An ultra-low-power microcontroller is an embedded controller optimized to minimize energy use during active processing, sleep, and standby operation. The STM32L0 family combines an ARM Cortex-M0+ processor, embedded Flash and SRAM, GPIO, timers, communication peripherals, and low-power management within one device. This integration allows a product to replace separate processor, memory, interface, and supervisory components while simplifying firmware and PCB design. The STM32L072VBT6 provides a 32 MHz ARM Cortex-M0+ core and 128 KB of Flash for program storage. Its integrated USB 2.0 controller supports connected peripheral, host, and USB Type-C interface designs. The 100-pin LQFP package provides a high pin count for exposed GPIO and peripheral assignments while retaining a leaded surface-mount form factor that can simplify inspection and assembly. A wide 1.65 V to 3.6 V operating range supports low-voltage embedded systems. The STM32L072VB family combines USB connectivity with ultra-low-power operation for cost-sensitive embedded platforms. Because the MCU integrates USB and multiple peripherals, board designers can reduce external component count and preserve PCB area around connectors, sensors, and communications modules. The 32 MHz Cortex-M0+ architecture provides ample performance for sensor nodes, data acquisition, human-interface equipment, and low-power control systems while maintaining a straightforward embedded software model. Typical uses include USB-connected sensors, compact industrial controllers, wearable accessories, medical monitoring equipment, instrument interfaces, and low-power IoT nodes. The STM32L072VBT6 is particularly suitable when a design needs both a large GPIO footprint and USB without moving to a more complex microcontroller package. Its 128 KB Flash capacity also gives firmware developers room for USB stacks, application logic, diagnostics, and field-upgrade logic. Design around the manufacturer's recommended decoupling, clock, reset, and USB implementation guidance. Place the device's input capacitors close to its supply pins, confirm that the selected USB transceiver or connector meets the required electrical characteristics, and validate low-power mode transitions under the intended peripheral load. PCB signal integrity and USB routing should be checked with the complete stack rather than inferred from the MCU pinout alone. This product page combines manufacturer specifications, verified distributor listings, package information, application guidance, and a parameter-focused comparison with closely related STMicroelectronics devices. It is intended to help engineers identify the correct memory configuration, package, connectivity requirements, and MCU-family alternative before committing a design to production.

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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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STM32L073CZT6 - 32MHz Cortex-M0+ 192KB Flash MCU | STMicroelectronics
STM32L073CZT6

STM32L073CZT6 - 32MHz Cortex-M0+ 192KB Flash MCU | STMicroelectronics

The STMicroelectronics STM32L073CZT6 is an ultra-low-power 32-bit microcontroller with an Arm Cortex-M0+ core, 32 MHz maximum CPU frequency, 192 KB of Flash memory, and a 48-LQFP 7 x 7 mm package. It integrates USB 2.0 crystal-less connectivity, a 12-bit ADC, a 12-bit DAC, and low-power features designed for compact embedded systems. An ultra-low-power microcontroller is an integrated circuit optimized to minimize energy consumption during active operation, sleep, and low-power standby states. The STM32L0 series belongs to the Arm Cortex-M microcontroller hierarchy and combines general-purpose control, analog measurement, firmware storage, and communication interfaces in one device. This makes it suitable for portable instruments, industrial sensors, connected accessories, and low-energy data-acquisition equipment. Principal features include a 32 MHz Arm Cortex-M0+ processor, 192 KB Flash memory, 20 KB SRAM, 6 KB EEPROM, and USB 2.0 support. The analog subsystem includes a 10-channel, 12-bit ADC and a two-channel, 12-bit DAC. Low-power design features include selectable crystal oscillators, a real-time-clock oscillator, low-power brownout detection, programmable voltage detection, and multiple sleep modes. The operating temperature range is -40°C to 85°C. The STM32L073CZT6 uses a compact 48-LQFP package with a 0.5 mm pitch. Its USB implementation supports crystal-less operation, reducing the component count and board area required for USB connectivity. The Cortex-M0+ instruction set is suitable for control loops, protocol handling, and modest signal-processing workloads without the memory requirements of a higher-performance Cortex-M core. Typical applications include USB-connected sensors, compact industrial control modules, low-power instrumentation, handheld meters, battery-operated monitoring equipment, and embedded systems that require analog conversion alongside USB communication. Designers can use the ADC for analog inputs, the DAC for controlled analog outputs, and the USB peripheral for data exchange or programming. PCB implementation should preserve the LQFP-48 land pattern and route USB data lines as a controlled-impedance differential pair. Decoupling capacitors should be placed close to the supply pins, while oscillator and analog grounding should follow the pin-description and layout guidance in the manufacturer datasheet. The 7 x 7 mm package still requires careful thermal and assembly planning at higher switching rates. This product page combines manufacturer specifications, engineering application guidance, structured alternatives, and design considerations to support faster component selection and PCB implementation. It also distinguishes exact drop-in hardware compatibility from parts that require firmware, peripheral, package, or qualification review before substitution.

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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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STM32L083CZT6 - 32MHz Cortex-M0+ MCU | STMicroelectronics
STM32L083CZT6

STM32L083CZT6 - 32MHz Cortex-M0+ MCU | STMicroelectronics

The STMicroelectronics STM32L083CZT6 is an ultra-low-power 32-bit Arm Cortex-M0+ microcontroller with 192 KB of Flash memory, a 32 MHz CPU, USB connectivity, LCD support, AES hardware acceleration, and 40 I/O pins in a 48-LQFP package. The 3.3 V device is designed for compact embedded systems that require flexible serial communications, low power consumption, and integrated security without relying on a separate USB interface controller. A microcontroller is a programmable semiconductor that integrates a CPU core, memory, peripherals, and communication interfaces into one device. The STM32L0 family belongs to the Arm Cortex-M0+ microcontroller class, where Cortex-M0+ is an energy-efficient processor architecture intended for cost-sensitive, embedded control applications. Within the broader semiconductor hierarchy, the STM32L083CZT6 is a 32-bit microcontroller and a member of the STM32L0 ultra-low-power product family. The STM32L083CZ family combines 192 KB of embedded Flash with communication capabilities including I2C, SPI, UART, and USB. Its LCD capability supports applications that need a local display, while its AES accelerator improves the processing efficiency of supported encryption and decryption operations. The device provides 40 I/O pins, giving a board designer access to digital interfaces and general-purpose inputs and outputs without requiring a separate large-scale I/O expander. Technical integration is especially useful in USB-connected embedded products. STMicroelectronics describes the STM32L083xx family as incorporating USB 2.0 crystal-less connectivity, reducing the external clock-component burden for compatible USB designs. The Cortex-M0+ instruction set and integrated peripherals allow firmware to handle device control, data acquisition, user-interface updates, communications, and encrypted data transfer within a single microcontroller package. Typical uses include compact data loggers, industrial sensing modules, USB-connected accessories, low-power control boards, human-interface devices, and embedded systems with local LCD feedback. Its 48-LQFP package also makes it practical for designs that require a relatively large pin count while avoiding the complexity of a ball-grid-array package. Designers should verify the complete pin assignments, peripheral multiplexing, clock configuration, decoupling requirements, and programming options against the manufacturer datasheet before layout. The principal selection trade-off is the combination of USB, LCD support, AES acceleration, and 192 KB of Flash in one low-power MCU; alternatives with fewer I/O pins or smaller memory would require software or hardware changes. This product record consolidates the manufacturer specifications, verified source links, drop-in candidate analysis, interface-oriented use cases, and practical design considerations into one engineering reference. The alternative analysis is deliberately conservative: it separates the electrically and mechanically distinct STM32L071RZT6 from the only confirmed same-package STM32L family alternative.

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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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STM32L100C6U6 - 32MHz Cortex-M3 MCU | STMicroelectronics
STM32L100C6U6

STM32L100C6U6 - 32MHz Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L100C6U6 is a 32-bit ARM Cortex-M3 microcontroller operating up to 32 MHz, with 32 KB of Flash memory and 4 KB of SRAM in a 48-pin UFQFPN package. It supports 2.5 V and 3.3 V operation and combines an ultra-low-power design with USB connectivity and autonomous dynamic voltage scaling. An ultra-low-power microcontroller is an embedded semiconductor designed to complete sensing, control, and communications tasks while minimizing energy consumption. The STM32L1 family belongs to the hierarchy of 32-bit microcontrollers, embedded processors, programmable controllers, and general-purpose semiconductors. This makes the STM32L100C6U6 suitable for battery-operated equipment where useful processing capability must coexist with long standby periods and low active current. The device provides a 32 MHz ARM Cortex-M3 core, 32 KB Flash, 4 KB SRAM, and USB connectivity according to the manufacturer product-page information and distributor records. Its autonomous dynamic voltage scaling adjusts the operating conditions as demand changes, while the low-power architecture includes multiple low-power modes. These characteristics are relevant to portable sensors, compact USB peripherals, industrial controllers, and connected embedded products. The STM32L100C6U6 combines general-purpose processing with low-power design techniques rather than focusing on a single high-throughput interface. Its 32-bit Cortex-M3 architecture supports efficient control workloads, while the 32 KB embedded Flash provides room for firmware, configuration data, and application code. The 48-pin UFQFPN package provides a compact surface-mount option for space-constrained assemblies, while the exposed thermal pad assists heat transfer when the device is properly soldered. Typical uses include low-power sensor nodes, USB-connected portable equipment, industrial monitoring modules, compact control boards, and low-energy IoT devices. In a sensor node, the microcontroller can remain in a low-power state between measurements and use its 32 MHz processing capability when data must be filtered, stored, or transmitted. In a USB peripheral, the integrated connectivity can simplify communication with a host computer. Designers should confirm the exact pin functions, exposed-pad layout, operating-temperature grade, and peripheral assignments against the manufacturer datasheet before layout release. Power sequencing, USB impedance-controlled routing, and low-leakage input design can materially affect reliability. The 48-pin package also requires careful thermal-via placement so heat can leave the exposed pad without compromising USB signal integrity. This product page combines verified manufacturer and distributor information, same-family drop-in candidates, a package-level comparison, and practical design guidance. It helps engineers evaluate the STM32L100C6U6 for low-power USB designs while clearly identifying specifications that still require confirmation from the official datasheet.

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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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STM32L151C6T6 - 32MHz Cortex-M3 Low-Power MCU | STMicroelectronics
STM32L151C6T6

STM32L151C6T6 - 32MHz Cortex-M3 Low-Power MCU | STMicroelectronics

STMicroelectronics STM32L151C6T6 is a 32-bit ARM Cortex-M3 microcontroller operating at 32 MHz, with 32 KB of Flash memory and a 48-pin LQFP package measuring 7 x 7 mm. It belongs to the STM32L1 ultra-low-power family and is designed for compact embedded systems that require efficient processing, USB connectivity, real-time timing, mixed-signal measurement, and serial peripheral support. An ultra-low-power microcontroller is an integrated semiconductor device that executes firmware while minimizing energy consumption during active operation and low-power standby. The STM32L1 family hierarchy places this device among low-power 32-bit ARM microcontrollers, combining processor performance, embedded memory, communications peripherals, and power-management capabilities in one surface-mount package. The STM32L151C6T6 provides a 32-bit ARM Cortex-M3 processor with a maximum clock frequency of 32 MHz. Its 32 KB Flash memory stores application firmware, while the STM32L151x6 family supports connectivity functions including USB. The broader STM32L151 family also includes RTC, LCD, USART, I2C, SPI, timers, ADC, DAC, and comparator resources, making the device applicable to compact control, sensing, communications, and human-interface designs. The STM32L151 architecture uses ARM Cortex-M3 instruction processing and integrates multiple serial and timing peripherals around the core. This architecture is appropriate for firmware involving interrupt-driven control, protocol management, data acquisition, and low-power monitoring. Exact SRAM capacity, EEPROM capacity, operating voltage range, current consumption, and peripheral performance ratings must be confirmed against the manufacturer documentation for the selected ordering code before final circuit design. Typical uses include USB-connected portable instruments, low-power sensor nodes, compact industrial controllers, battery-operated equipment, and LCD-driven human-interface modules. The 48-pin LQFP exposes enough I/O and peripheral connections for mixed-signal designs while remaining compatible with conventional leaded-package inspection and assembly processes. PCB design should preserve the pin arrangement and exposed connections specified by the STM32L151C6 documentation, route sensitive analog inputs away from switching nodes, and place decoupling capacitors close to the appropriate supply pins. Firmware and peripheral configuration should also account for the low-power operating modes and clock tree before power consumption is validated. This product page combines the manufacturer identity, core processing and memory ratings, package details, interface positioning, application guidance, verified package alternatives, and PCB-oriented design considerations into one engineering-focused reference for evaluating the STM32L151C6T6.

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STM32L151C6U6 - 32-Bit ARM Cortex-M3 Microcontroller | STMicroelectronics
STM32L151C6U6

STM32L151C6U6 - 32-Bit ARM Cortex-M3 Microcontroller | STMicroelectronics

The STMicroelectronics STM32L151C6U6 is a 32-bit ARM Cortex-M3 microcontroller in the STM32L1 series, intended for low-power embedded systems that require efficient processing, compact packaging, and a broad set of serial peripherals. The verified-source retrieval for this part timed out without returning distributor records or a manufacturer datasheet extract, so this page does not assert unverified electrical ratings, memory capacities, clock limits, pin assignments, or lifecycle claims. Those values require confirmation against the official STMicroelectronics documentation before schematic release or PCB sign-off. A microcontroller is a programmable semiconductor device that integrates a processor core, memory, and peripherals such as GPIO, serial interfaces, timers, and analog blocks. In system-level terminology, the STM32L151C6U6 belongs to the MCU hierarchy: 32-bit microcontroller, embedded processor, and system-on-chip-class component. Its family designation indicates that it is positioned around low-power and resource-constrained applications rather than high-pin-count high-performance processing. The STM32L1 product family is commonly evaluated for battery-powered sensors, low-power wireless nodes, industrial monitoring equipment, building controls, and portable measurement instruments. Design selection normally compares Flash memory, SRAM, maximum clock frequency, package dimensions, pin count, GPIO count, peripheral mix, operating-voltage range, temperature range, and low-power current consumption. Because none of those numerical values were present in the supplied verified dataset, each unavailable specification is explicitly marked with a DATA_NEEDED identifier on this page. The MPN suffix identifies a specific ordering configuration. Engineers should confirm the package type, pin count, temperature grade, flash-memory capacity, and reel or tray packing directly from the official ordering information. The same caution applies to any board-level replacement: a part must use the same PCB footprint, expose compatible I/O, support the required operating voltage, and provide adequate memory and peripheral resources. Similar family names alone do not establish drop-in compatibility. For a new design, start from the current official STM32L151 datasheet, reference manual, errata, and hardware-design guidance. Confirm the exact pin multiplexing, supply pins, decoupling requirements, boot configuration, programming interface, and exposed-pad treatment. Software should also be validated against the exact device identifier because different memory configurations within the same family can use different startup and low-power routines. This page separates verified information from unresolved engineering data to prevent an unavailable web result from being mistaken for a complete component specification.

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