Circuitos Integrados

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

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

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

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

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

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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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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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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STM32L151CBT6

STM32L151CBT6 - 32MHz Cortex-M3 MCU | STMicroelectronics

STMicroelectronics STM32L151CBT6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller operating up to 32 MHz, with 128 KB of Flash memory, 16 KB of SRAM, and 4 KB of EEPROM in a 48-LQFP 7 x 7 mm package. It integrates USB, LCD controller, ADC, DAC, and extensive low-power peripherals for compact embedded systems. A microcontroller is a programmable semiconductor that combines a processor core, memory, and peripherals on one integrated circuit. The STM32L1 family belongs to the broader hierarchy of ARM Cortex-M microcontrollers, embedded processors, and semiconductor control devices. Its Cortex-M3 architecture supports efficient interrupt-driven control, while the integrated peripherals reduce the component count required for sensors, human-interface interfaces, communications, and low-power data acquisition. The STM32L151CBT6 combines 128 KB Flash for firmware with 16 KB SRAM for working data and 4 KB EEPROM for nonvolatile parameters. Its 32 MHz maximum clock provides useful processing capacity for protocol handling and control loops. Integrated connectivity includes USB, and the feature set also includes an LCD controller, ADC, and DAC, enabling compact designs without separate interface converters for every supported function. The STM32L1 platform is designed for energy-conscious embedded products. Low-power operating modes are central to the device family, allowing firmware to balance responsiveness with reduced current consumption during idle periods. Exact supply-voltage limits, current consumption by mode, flash endurance, and operating-temperature limits should be checked against the manufacturer datasheet before fixing the power architecture or product temperature rating. Typical uses include battery-powered sensing equipment, compact industrial controllers, USB-connected data loggers, small human-interface panels, and low-energy measurement instruments. The LCD controller is useful for local status displays, the ADC supports analog measurement, the DAC supports analog output, and USB simplifies connectivity to a host computer or peripheral equipment. PCB implementation should preserve the manufacturer's recommended decoupling and exposed-pad connection details for the 48-LQFP package. Confirm boot configuration, unused-pin treatment, clock options, and USB transceiver requirements in the device documentation. For firmware migration, compare peripheral assignments and software-support packages rather than assuming that another STM32 device is interchangeable solely because it uses an ARM Cortex-M core. This product page consolidates the verified STM32L151CBT6 identity, memory and connectivity characteristics, family-level replacement candidates, comparison fields, and application-oriented design guidance. It is intended to support initial component selection and PCB planning while directing final engineering decisions to the official STMicroelectronics datasheet.

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STM32L151CBU6

STM32L151CBU6 - 32MHz Cortex-M3 128KB Flash Ultra-Low-Power MCU | STMicroelectronics

The STMicroelectronics STM32L151CBU6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller running at up to 32 MHz with 128 KB of embedded Flash and 16 KB of SRAM, housed in a 48-pin UFQFPN (7x7 mm) package. It integrates a 12-bit ADC, a 12-bit DAC, a USB full-speed device peripheral, an LCD controller, 4 KB of EEPROM, and a low-power LCD driver, making it a compact single-chip solution for connected sensing and metering nodes. An ultra-low-power microcontroller is a type of embedded processor engineered to minimise energy consumption during both active operation and deep sleep. This class of device sits inside the broader hierarchy of microcontroller -> embedded processor -> semiconductor, and it differs from general-purpose Cortex-M parts by adding low-power modes, RTC wake-up capability, and analog peripherals designed for battery-operated equipment. The STM32L1 series specifically targets energy-harvesting, metering, sensor-hub, and connected-USB applications where average current draw matters more than raw compute. Key differentiating features include the Cortex-M3 core with hardware multiplier, 128 KB Flash for firmware and data, 16 KB SRAM, 4 KB of EEPROM, and a rich peripheral set spanning USART, SPI, I2C, timers, ADC, DAC, USB, and an LCD controller. Because the analog conversion and USB blocks are on-chip, no external converter or transceiver is required for typical sensor-to-host designs. Architecturally the part is built around a 32-bit Cortex-M3 pipeline with low-power sleep, low-power run, and stop modes, backed by a real-time clock with wake-up timers and external interrupts. The analog section provides a 12-bit successive-approximation ADC with multiple inputs plus a 12-bit DAC on one of the timer outputs, which lets a single device both acquire a sensor signal and generate an excitation or reference voltage without extra silicon. Typical applications include USB-connected sensor and data-logger dongles, smart metering and energy-harvesting nodes, low-power LCD instruments such as thermostats and industrial panel meters, portable medical and wellness monitors with analog front ends, IoT gateway modules, and battery-powered industrial data-acquisition terminals. When designing with this device, budget the supply rail carefully: the USB and analog blocks require headroom for their operating ranges, and decoupling capacitors should sit directly on the power pins. Keep analog signal routing away from the switching and USB return paths, and confirm the temperature grade and regulator topology against the manufacturer datasheet before committing to a production layout. This page consolidates the device parameters, verified distributor availability, qualified drop-in alternatives in the same 48-pin UFQFPN footprint, and practical design notes that go beyond the manufacturer datasheet, giving design and sourcing engineers one reference for the STM32L151CBU6.

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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

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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STM32L151CCU6

STM32L151CCU6 - 32MHz Cortex-M3 MCU | STMicroelectronics

STMicroelectronics STM32L151CCU6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller with a 32 MHz processing frequency, 256 KB of Flash memory, and a 48-pin UFQFPN package measuring 7 x 7 mm. It integrates USB connectivity and two operational amplifiers, making it suitable for compact embedded systems that require moderate processing performance, analog functions, and low-power operation. An ultra-low-power microcontroller is an embedded processing device designed to maintain useful performance while minimizing energy consumption during active operation, sleep, and low-power states. The STM32L151 belongs to the STM32L1 low-power MCU family, combining an ARM Cortex-M3 core, embedded memory, communication peripherals, analog resources, and low-power control features within one integrated package. The STM32L151CCU6 provides 256 KB of Flash for firmware, 32 KB of SRAM for working data, and a 32-bit Cortex-M3 processor operating at up to 32 MHz. Its USB interface supports connected peripheral and embedded-control designs, while the two integrated operational amplifiers reduce the need for separate analog amplifiers in sensing and signal-conditioning circuits. The 48-pin UFQFPN format supports dense PCB layouts without using a large leaded package. The device is positioned for applications that need more memory or peripheral breadth than the smallest STM32L devices while retaining the low-power characteristics of the STM32L1 family. Its 2.5 V and 3.3 V operating references are suitable for embedded equipment using conventional industrial and consumer supply levels. Exact peripheral details, clock limits, electrical limits, and current consumption should be selected from the manufacturer datasheet for the complete STM32L151 and STM32L152 device family. Typical uses include USB-connected data loggers, low-power sensor nodes, compact industrial controllers, medical or laboratory instruments, and embedded access-control modules. The integrated operational amplifiers can support signal acquisition, current sensing, or analog front-end conditioning, while USB connectivity simplifies host-to-device data exchange. Firmware designers should also evaluate low-power modes, wake-up sources, and the peripheral mix when planning battery-operated equipment. A critical design step is to verify the exposed-pad connection, pin assignment, and decoupling requirements directly against the STM32L151CCU6 pinout and recommended circuit diagrams. Place input and output capacitors close to their associated supply pins, route sensitive analog signals away from switching nodes, and follow the manufacturer guidance for exposed-pad thermal and layout requirements. This product page combines the principal STM32L151CCU6 identity, memory, clock, connectivity, analog, and packaging characteristics with practical replacement guidance and design notes. It also distinguishes exact pin-compatible family options from substitutions that require software, memory, peripheral, or qualification review before deployment.

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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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STM32L151QDH6

STM32L151QDH6 - 32MHz Cortex-M3 384KB MCU | STMicroelectronics

STMicroelectronics STM32L151QDH6 is an ultra-low-power, 32-bit ARM Cortex-M3 microcontroller with a 32 MHz operating frequency, 384 KB of Flash memory, and USB connectivity in a 132-UFBGA (7x7 mm) package. The device belongs to the STM32L1 microcontroller family and is suited to compact embedded systems requiring substantial flash storage, low-power operation, and a broad set of mixed-signal peripherals. An ultra-low-power microcontroller is a semiconductor device designed to minimize energy consumption while executing control, communications, sensing, and data-processing functions. The STM32L151QDH6 combines an ARM Cortex-M3 RISC core, embedded Flash, SRAM, USB, analog conversion, digital-to-analog conversion, LCD support, memory interfaces, and communication peripherals. Within the product hierarchy, it is a 32-bit microcontroller and system-on-chip solution for battery-operated and energy-conscious embedded products. Verified device information identifies 384 KB of Flash, a 32 MHz Cortex-M3 core, a 132-UFBGA package, 3.3 V operation, and USB support. Additional verified sources list 48 KB SRAM, 12 KB EEPROM, two 12-bit converters, LCD support, ADC, DAC, and memory interfaces. These resources allow firmware, interface drivers, application logic, and control functions to be consolidated without requiring a separate external memory device in many designs. The USB capability makes this MCU useful for portable data-acquisition equipment, USB-connected sensors, configuration tools, and service interfaces. Its analog resources are useful for industrial monitoring and battery-powered instrumentation, while the large Flash footprint can accommodate connected-device firmware, protocol stacks, and local data-processing functions. The compact 7x7 mm UFBGA is appropriate for space-constrained designs but requires careful PCB layout and assembly process control. Designers should verify supply voltage limits, GPIO drive characteristics, analog-reference requirements, clock configuration, USB transceiver connections, decoupling, and exposed-ball assignments against the manufacturer datasheet before layout. Because the exact 132-ball pinout is not provided in the verified data and no canonical 132-UFBGA package illustration exists in the available package library, this page conservatively omits individual pin assignments rather than presenting unverified connection data. This page consolidates verified distributor and manufacturer information, purchase channels, technical comparisons, drop-in replacement findings, and application guidance. Its main engineering value is separating confirmed STM32L151QDH6 attributes from specifications that still require confirmation from the complete manufacturer datasheet.

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STM32L151R8T6ATR

STM32L151R8T6ATR - 64KB Flash Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L151R8T6ATR is an ultra-low-power ARM Cortex-M3 microcontroller with 64KB Flash and 32MHz CPU, housed in a 64-pin LQFP (10x10x1.4mm) package. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory (Flash), data memory (SRAM), and programmable peripherals. Ultra-low-power MCUs target battery-operated and energy-harvesting applications by combining a low-leakage process technology with multiple low-power modes (Sleep, Low-Power Sleep, Stop with RTC, Standby) that draw microamp-level quiescent current. Within the broader taxonomy, the STM32L1 sits below application processors (Cortex-A), above simple 8-bit MCUs, and is positioned for always-on sensing, metering, and human-interface designs where months-to-years battery life matter more than raw throughput. Key specifications include 64KB Flash, 10KB SRAM (per the STM32L1 datasheet family), an internal 32kHz RTC oscillator, multiple timer/counter peripherals, I2C/SPI/USART/USB interfaces, 12-bit ADC, and a 1.8V-3.6V supply range. The device supports seven low-power modes with a typical Stop-mode current in the microamp range, enabling coin-cell powered designs. The Cortex-M3 core implements the Thumb-2 instruction set, NVIC for interrupt handling, and is supported by ST's STM32Cube ecosystem including HAL, LL drivers, and STM32CubeIDE. Peripherals include up to 83 fast GPIOs, a real-time clock with calendar, brown-out reset, and a 12-bit ADC. Typical applications include portable medical devices, industrial sensor nodes, smart meters, fitness wearables, and home automation controllers. The 64KB Flash / 10KB RAM balance targets small to mid-tier firmware stacks including BLE software stacks via external transceivers. Design with adequate decoupling (100nF + 4.7uF) on each VDD pin and keep the NRST line short with a 100nF capacitor to ground. Use the STM32CubeMX configuration tool to assign pin alternate functions and validate clock tree settings. This page synthesizes distributor pricing, lifecycle status, same-family alternatives, and practical design notes not consolidated in the manufacturer datasheet.

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STM32L151RCT6

STM32L151RCT6 - 32MHz Cortex-M3, 256KB Flash MCU | STMicroelectronics

The STMicroelectronics STM32L151RCT6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller running at 32 MHz with 256 KB of Flash memory and 64 pins in an LQFP (10x10 mm) package. It integrates USB 2.0 full-speed device, three operational amplifiers, and five low-power modes for battery-critical designs. An ultra-low-power MCU is a microcontroller engineered to minimize energy per operation and standby consumption, sitting within the broader hierarchy of ARM Cortex-M-based microcontrollers under the power-management-optimized IC family. The STM32L1 series uses STMicroelectronics proprietary ultra-low-leakage process technology with autonomous dynamic voltage scaling, allowing the core to run from a scaled supply without external regulation complexity. Key features include 256 KB Flash and 32 KB of ECC-enabled RAM, a 32 MHz Cortex-M3 core, USB FS device support, and 3x integrated op-amps that offload analog signal conditioning from external components. The device operates from a 1.65 V to 3.6 V supply and offers multiple low-power modes down to a low-leakage standby state, making it suited for energy-scavenging and coin-cell products. Technically, the autonomous dynamic voltage scaling regulator adjusts core voltage to the operating frequency, cutting dynamic power while preserving wake-up latency. The five low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop, Standby) let designers trade wake-up time against current draw precisely. Typical applications include battery-powered metering, portable medical monitoring, and industrial sensor nodes using USB connectivity for configuration and data upload. A key design consideration: in Stop and Standby modes the low-speed oscillator domain remains critical for RTC-based wake-up, so layout and clock tree configuration deserve early attention. This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet alone.

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STM32L151VBT6

STM32L151VBT6 - 32MHz Cortex-M3 128KB MCU | STMicroelectronics

The STMicroelectronics STM32L151VBT6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller with a 32 MHz maximum clock, 128 KB of Flash memory, and 16 KB of SRAM in a 100-pin LQFP package measuring 14 x 14 mm. It also includes 4 KB of EEPROM and integrated 12-bit ADC and DAC resources, making it suitable for compact control systems that need low-power operation, USB connectivity, LCD control, and analog signal conditioning. A microcontroller is an integrated semiconductor device containing a processor core, nonvolatile program memory, working memory, peripherals, and communication interfaces. In the product hierarchy, the STM32L151VBT6 is an ARM Cortex-M3 MCU within the STM32L1 ultra-low-power family, combining embedded real-time control with low-power management for battery-powered and energy-conscious equipment. The STM32L151VBT6 operates at up to 32 MHz and delivers 1.25 DMIPS/MHz according to the manufacturer information. Its 128 KB Flash supports application firmware, while 16 KB of SRAM provides working space for control routines and data processing. The 4 KB EEPROM allows frequently changed calibration, configuration, or serial data to be retained without consuming Flash space. Its integrated feature set includes a 12-bit ADC, 12-bit DAC, USB, LCD support, programmable voltage detection, brownout reset, and ultra-low-power POR/PDR functions. The device offers a 1 MHz to 24 MHz crystal oscillator range and a 32 kHz oscillator for real-time-clock operation with calibration. These resources reduce external component requirements in sensing, monitoring, and embedded user-interface designs. Typical uses include compact industrial sensors, USB-connected data loggers, low-power instrumentation, LCD-based control panels, battery-powered monitors, and portable measurement equipment. The large 100-pin package exposes substantially more I/O than smaller STM32L1 variants, allowing multiple sensors, displays, communications interfaces, and actuator-control signals to share one controller. Designers should account for the higher pin count and board area when choosing this option, but the LQFP-100 format is particularly useful for through-hole prototyping and automated assembly. Firmware must configure the clock tree, low-power modes, USB transceiver, analog peripherals, and alternate-function routing before the full device capability becomes available. The pin-description and alternate-function tables in the manufacturer datasheet should be used for every PCB assignment. This product page combines the manufacturer-described device characteristics with practical application guidance, footprint selection advice, and electrically focused alternatives. These engineering-oriented details help teams distinguish the STM32L151VBT6 from lower-pin-count, higher-memory, or functionally adjacent STM32L1 devices before committing to a board design.

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STM32L151VCT6

STM32L151VCT6 - 256KB Flash Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L151VCT6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller with 256 Kbytes of Flash, 32 Kbytes of SRAM, and a 32 MHz CPU, housed in a 100-pin LQFP (14x14 mm) package. According to the ST product page, this device is part of the STM32L1 family, integrates USB FS, three rail-to-rail operational amplifiers, a 12-bit ADC, multiple timers, and standard communication peripherals. What is an ultra-low-power MCU? An ultra-low-power microcontroller is a class of embedded processor specifically designed to minimize active and standby current consumption so that battery-powered products can operate for months or years on a single cell. The technology hierarchy is: MCU -> microcontroller -> embedded processor -> semiconductor IC. The STM32L1 family extends ST's mainstream STM32 architecture into energy-harvesting, metering, medical, and IoT segments where quiescent current in the microampere range and flexible low-power modes are critical. Key features highlighted in the datasheet include seven low-power modes (including Stop and Standby with RTC), a wide 1.65-3.6 V supply range, up to 83 general-purpose I/Os, a 12-bit 1 Msps ADC, two 12-bit DACs, USB 2.0 Full-Speed device, three op-amps, two comparators, and a real-time clock with calendar. The integrated voltage regulator and power-on reset simplify external circuitry, while the Cortex-M3 core supports Thumb-2 instruction set for high code density. The STM32L151VCT6 uses a 32 kHz and an internal 16 MHz high-speed RC oscillator with PLL, eliminating external crystals in many designs. JTAG and SWD debug interfaces support standard toolchains including Keil MDK, IAR EWARM, and STM32CubeIDE. AES 128-bit hardware encryption is included in this density variant of the STM32L1 line for secure connectivity use cases. Typical applications include battery-operated sensor nodes, USB peripherals (HID, CDC), portable medical devices, smart-home IoT endpoints, energy-harvesting designs, and industrial metering. The combination of USB, op-amps, and low-power modes is particularly attractive for compact measurement instruments that must communicate with a host PC. When designing with the STM32L151VCT6, select decoupling capacitors of 100 nF near each VDD pin plus a 4.7 uF bulk capacitor. Verify unused pins are tied to a defined logic level to avoid parasitic current paths. The LQFP-100 footprint has 0.5 mm pitch - use 4-layer PCB with controlled impedance for USB D+/D- traces. This page synthesizes distributor pricing, verified drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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STM32L151VCT6A

STM32L151VCT6A - 256KB Flash 32MHz Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L151VCT6A is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller with 256KB of Flash memory, 32KB of SRAM, and a 32MHz CPU, housed in a 100-pin LQFP (14x14mm) package. The 'A' suffix denotes the industrial-grade operating temperature range (-40C to +85C) and tape-and-reel packaging. As part of the STM32L1 family, it targets battery-powered and energy-harvesting applications where every microamp counts. A microcontroller (MCU) is a single-chip computer integrating a CPU core, volatile memory (SRAM), non-volatile memory (Flash), and programmable peripherals into one package. The STM32L1 series specifically occupies the 'ultra-low-power' tier of the MCU taxonomy - sitting between general-purpose Cortex-M0/M3 microcontrollers and dedicated signal-processing MCUs - and is hierarchically classified as: microcontroller -> embedded processor -> semiconductor. The L1 family uses ST's proprietary ultra-low-leakage process and an innovative autonomous dynamic voltage scaling (DVS) topology. Key features include 4KB of true EEPROM (a rare find on Cortex-M MCUs), 12-bit ADC, 12-bit DAC, multiple low-power modes (Standby, Stop, Sleep) drawing as little as 1.4 uA in Stop mode with RTC retention, and a built-in USB 2.0 Full-Speed controller with on-chip transceiver. The 100-LQFP package exposes up to 83 GPIO across multiple 5V-tolerant ports, plus USART, SPI, I2C, USB, CAN, and timers. The Cortex-M3 core delivers 1.25 DMIPS/MHz (Dhrystone MIPS) while supporting Thumb-2 instructions for code density. The integrated voltage regulator dynamically scales the internal core voltage based on clock frequency, enabling the dynamic voltage scaling that defines the L1 family. Five low-power modes - Sleep, Low-Power Sleep, Stop with RTC, Standby, and Standby with RTC - allow energy budgets as low as 9 uA/MHz active and 1.4 uA Stop. Typical applications include wearable fitness bands, portable medical sensors, wireless sensor nodes, smart meters, industrial remote controls, and battery-backed IoT devices. The 256KB Flash is sufficient for RTOS-based designs using FreeRTOS or for BLE/ZigBee stacks when paired with a network co-processor. The integrated 4KB EEPROM eliminates the need for external EEPROM in many designs, simplifying BOM and lowering cost. When designing with the STM32L151VCT6A, choose the LQFP-100 footprint for hand-rework-friendly prototypes and migration to other L1 family parts. Verify your Stop-mode current budget against the 1.4 uA typical figure (it rises to several uA with RTC enabled). For 1.8V-3.6V supply, internal voltage regulation is automatic; at lower voltages the integrated POR/PDR handles brownout reset. This page synthesizes distributor pricing from DigiKey and Mouser, drop-in alternatives within the same LQFP-100 package, and practical design notes not found in the manufacturer datasheet - giving engineers a faster path from part selection to prototype.

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STM32L151VCT6D

STM32L151VCT6D - 32MHz Cortex-M3 MCU 256KB Flash | STMicroelectronics

The STMicroelectronics STM32L151VCT6D is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller with 256 Kbytes of Flash, 32 Kbytes of SRAM, and 8 Kbytes of true EEPROM, packaged in a 100-pin LQFP (14x14 mm). Operating at up to 32 MHz, it integrates USB 2.0 Full-Speed, three operational amplifiers, a 12-bit ADC and DAC, an LCD controller, and a wide range of peripherals designed for battery-powered and energy-harvesting applications. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, memory, and programmable I/O peripherals. The Cortex-M3 architecture used in the STM32L151 family provides a 32-bit instruction set with deterministic interrupt handling, sitting in the broader hierarchy ARM Cortex-M -> 32-bit MCU -> embedded processor -> semiconductor. Within ST's portfolio, the STM32L1 series is positioned in the ultra-low-power (ULP) tier, competing with the MSP430 (Texas Instruments) and the EFM32 (Silicon Labs) families. Key specifications include the 256 Kbyte Flash program memory, 32 Kbyte SRAM, 8 Kbyte EEPROM, an operating voltage range of 1.65 V to 3.6 V, a maximum CPU speed of 32 MHz, and an extended industrial temperature range of -40 C to +105 C. The integrated 12-bit ADC delivers up to 1 Msps with multiple channels, while the 12-bit DAC supports low-power waveform generation. Three on-chip op-amps enable direct analog signal conditioning without external components, simplifying sensor-interface designs. The 100-pin LQFP package provides ample GPIO for complex peripheral routing. USB 2.0 Full-Speed with on-chip PHY, multiple USART/UART/SPI/I2C interfaces, and an 8x40 (or 4x44) segment LCD controller make this device well suited for human-machine interfaces and connected sensor nodes. Deep power modes (Standby, Stop with RTC) reach sub-microamp currents, enabling multi-year battery life in metering and IoT applications. Typical applications include industrial wireless sensor nodes, portable medical monitors, smart meters, home automation gateways, asset-tracking tags, and ultra-low-power data loggers. The integrated op-amps are commonly used to amplify signals from thermocouples, photodiodes, and Wheatstone-bridge sensors. When designing with this device, take advantage of the integrated op-amps to reduce BOM and PCB area, but verify that the op-amp bandwidth and rail-to-rail input range meet your sensor signal requirements. The on-chip EEPROM (rather than emulated EEPROM in Flash) provides 100 k erase/write cycles endurance, simplifying data logging. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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STM32L151VDT6

STM32L151VDT6 - Ultra-Low-Power ARM Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L151VDT6 is an ultra-low-power 32-bit microcontroller based on the ARM Cortex-M3 core, operating at up to 32 MHz. It features 384 KB of Flash memory and 48 KB of SRAM, making it suitable for a wide range of battery-powered and energy-efficient applications. The device is housed in a 100-pin LQFP package (14x14 mm) and supports a supply voltage range of 1.8V to 3.6V. 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, to reduce power draw during idle periods. In the system hierarchy, an ultra-low-power MCU falls under the category of microcontrollers, which are part of embedded systems and integrated circuits. The STM32L1 series is specifically optimized for applications where battery life is critical, such as portable medical devices, smart sensors, and wireless communication nodes. Key features of the STM32L151VDT6 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 1 Msps, two 12-bit DACs, and a wide range of communication interfaces including USART, SPI, I2C, USB, and CAN. The device also integrates a real-time clock (RTC) with calendar and alarm functions, and a true EEPROM emulation capability. Technically, the STM32L151VDT6 is built on a 130nm process technology, which contributes to its low power consumption. The core operates at 1.8V to 3.6V, and the device can run at up to 32 MHz. The Flash memory is organized with 4x64 KB sectors, and the SRAM is 48 KB. The device supports a wide operating temperature range of -40°C to +85°C, making it suitable for industrial applications. Typical applications include portable medical devices (e.g., glucose meters, pulse oximeters), smart meters, wireless sensor nodes, and industrial control systems. The ultra-low-power modes allow the MCU to operate for years on a single coin cell battery in applications with low duty cycles. When designing with this device, it is important to consider the power supply decoupling: place a 100nF capacitor close to each VDD pin and a 4.7uF capacitor at the main power input. Additionally, the VBAT pin should be connected to a backup battery or a capacitor to maintain RTC operation during main power loss.

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STM32L151ZET6

STM32L151ZET6 - 32MHz Cortex-M3 512KB MCU | STMicroelectronics

The STMicroelectronics STM32L151ZET6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller operating at up to 32 MHz, with 512 KB of embedded Flash memory, 80 KB of SRAM, USB, and two operational amplifiers, housed in a 144-LQFP 20 x 20 mm package. The verified distributor data identifies a 2.5 V to 3.3 V supply arrangement, 115 GPIO, 12-bit and 12-bit conversion resources, and an industrial temperature range of -40 °C to +85 °C. A microcontroller is a programmable semiconductor that integrates a processor core, memory, peripherals, and communication interfaces on one device. The STM32L1 family belongs to the broader hierarchy of microcontroller, embedded processor, semiconductor, and electronic-component categories. The STM32L151ZET6 is intended for designs that require substantial embedded memory, a large pin count, low-power operation, USB connectivity, and analog signal conditioning in a single package. The STM32L151ZET6 combines a 32 MHz ARM Cortex-M3 processor with 512 KB of Flash and 80 KB of SRAM. Its 144-pin LQFP package provides 115 GPIO according to the verified listing, enabling extensive connections to sensors, actuators, human-interface interfaces, communications equipment, and external memory or peripheral devices. The integrated USB interface and dual operational amplifiers reduce the need for separate support components in suitable USB-enabled and analog designs. The STM32L1 architecture is positioned for low-power embedded systems where energy efficiency and control capability are both important. Its supply range, conversion resources, GPIO count, and memory capacity make it suitable for industrial control, data acquisition, USB peripherals, communications equipment, and embedded instrumentation. The large 144-LQFP footprint is useful when the design requires many discrete I/O connections and offers straightforward assembly in through-hole-compatible production processes. Because the verified data does not include the complete electrical limits, peripheral map, watchdog details, clock-tree configuration, or a manufacturer-authoritative pinout, those values should be confirmed in the STMicroelectronics device documentation before schematic capture or PCB release. The 115-GPIO figure, 512 KB Flash, 80 KB SRAM, 32 MHz maximum CPU frequency, USB capability, dual operational amplifiers, and -40 °C to +85 °C range are directly reflected in the supplied distributor information. Pricing shown here reflects the quoted distributor unit price as of 2026-10-30 and may change with quantity and market conditions. This page combines verified sourcing data, practical application fit, package information, and a conservative comparison of available drop-in information. The replacement search identified STM32L152ZET6 as the closest documented same-package family alternative, while the broader cross-reference results caution that pin compatibility alone does not guarantee code, timing, or peripheral equivalence.

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STM32L152C8U6

STM32L152C8U6 - 32MHz Cortex-M3 64KB MCU | STMicroelectronics

The STMicroelectronics STM32L152C8U6 is an ultra-low-power 32-bit ARM Cortex-M3 microcontroller rated at 32 MHz, with 64 KB of Flash memory and 48-pin UFQFPN packaging at 7 mm by 7 mm. The listing identifies an MCU rather than a discrete power device, so its main design value is integrated control, communication, analog conversion, and low-power management. A microcontroller is a semiconductor that executes embedded firmware from nonvolatile Flash memory and coordinates a system’s sensors, communications, timers, and actuators. The STM32L1 series belongs to the ARM Cortex-M3 microcontroller hierarchy and combines processor performance, memory, serial interfaces, analog peripherals, and power-management functions on one integrated circuit. This makes the STM32L152C8U6 suitable for compact embedded products that need several peripherals without a discrete processor. Verified distributor information identifies a 32-bit architecture, 32 MHz operating frequency, 64 KB Flash, and 48-pin UFQFPN package. Search results also describe the family as ultra-low power and list RTC, LCD, USB, USART, I2C, SPI, timers, ADC, DAC, and comparators. A secondary result snippet additionally reports 128 KB Flash, 16 KB SRAM, and 4 KB EEPROM for STM32L152-family documentation, but that conflicts with the exact-part DigiKey result identifying this orderable MPN as 64 KB; the exact MPN listing is therefore used. The peripheral mix makes the device useful for USB-connected sensing, industrial data acquisition, meter and instrument control, low-power monitoring, and LCD-based user interfaces. Its 32 MHz Cortex-M3 core provides a common ARM software ecosystem, while ADC, DAC, and comparator resources can reduce the need for external signal-conditioning or conversion components. Firmware compatibility, peripheral availability, and electrical limits must still be checked against the exact STM32L152C8U6 datasheet. A critical design consideration is that the 48-pin UFQFPN package exposes an exposed thermal and electrical pad whose connection requirements must follow the manufacturer land pattern. Decoupling, exposed-pad soldering, clock stability, and analog grounding should be planned before PCB release. Because the supplied source snippets do not provide a complete verified pin list, no guessed pin assignments are used here. This page consolidates exact distributor and manufacturer-source facts, identifies uncertainty where snippets conflict, and avoids treating generic STM32L1 family features as exact specifications unless the provided evidence identifies them for STM32L152C8U6. It also distinguishes verified sourcing information from parameters requiring confirmation in the full manufacturer datasheet.

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