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STM32L152ZCT6 - 32MHz Cortex-M3 256KB MCU | STMicroelectronics
STM32L152ZCT6

STM32L152ZCT6 - 32MHz Cortex-M3 256KB MCU | STMicroelectronics

STMicroelectronics STM32L152ZCT6 is a 32-bit ARM Cortex-M3 microcontroller with a 32 MHz operating frequency, 256 KB of flash memory, and a 144-pin LQFP package measuring 20 mm by 20 mm. The STM32L152 series combines an ultra-low-power microcontroller platform with USB and LCD connectivity, making the device suitable for embedded systems that require a combination of low-power operation, serial connectivity, and a relatively high pin count. A microcontroller is a programmable system-on-chip containing a processor core, memory, and peripherals such as communications interfaces, timers, and analog converters. The STM32L152 belongs to the STM32L1 low-power MCU family, with the Cortex-M3 core providing a 32-bit RISC processing architecture. Its 256 KB program memory is organized as 256K by 8 bits, while the 144-pin package provides access to a broad selection of GPIO and peripheral functions. The verified product data identifies a maximum core frequency of 32 MHz, an operating supply value of 3 V, USB and LCD support, and a fast 8 microsecond wake-up time. These features distinguish the part for portable instruments, connected embedded controls, industrial data-acquisition equipment, and human-machine-interface designs. The USB interface can support direct host or device connectivity, while LCD connectivity reduces the component count required for display-based products. The Cortex-M3 core executes 32-bit instructions and operates at 32 MHz. The STM32L152 is positioned as an ultra-low-power platform, making power-conscious operation a central design consideration alongside processing performance. The manufacturer datasheet should be consulted for detailed clock-tree limits, peripheral electrical characteristics, GPIO alternate-function assignments, current consumption, and operating-temperature limits that are not included in the supplied distributor summaries. Typical uses include USB-connected portable measurement devices, industrial control panels with LCD feedback, data loggers, low-power sensor nodes, and embedded human-machine interfaces. The 144-pin LQFP package offers extensive I/O capacity compared with smaller MCU packages, although its 20 mm by 20 mm footprint requires more PCB area than QFN alternatives. The package also provides exposed leads that simplify visual inspection and rework compared with fine-pitch no-lead packages. Designers should verify every assigned pin against the STM32L152ZCT6 pinout and alternate-function tables before PCB release. Pay particular attention to USB signal routing, analog inputs, oscillator connections, supply pins, and debugging functions. Because only summarized source data is available here, voltage tolerances, RAM capacity, GPIO count, ADC channels, and package-specific thermal limits must be confirmed from the manufacturer datasheet rather than inferred from the product family. This product page consolidates verified distributor specifications, pricing, package information, practical design guidance, and same-footprint family alternatives. It also distinguishes confirmed values from parameters that still require datasheet verification, helping engineers make procurement and design decisions without relying on unsupported assumptions.

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STM32L152ZDT6 - 32MHz Cortex-M3 USB MCU | ST
STM32L152ZDT6

STM32L152ZDT6 - 32MHz Cortex-M3 USB MCU | ST

STMicroelectronics STM32L152ZDT6 is an ultra-low-power 32-bit microcontroller with an Arm Cortex-M3 core, a maximum 32 MHz operating frequency, 384 KB of Flash memory, USB connectivity, and 144 leads in an LQFP 20 x 20 mm package. It combines an 8 μs wake-up time with low-power operating modes for responsive, energy-conscious embedded systems. The STM32L152ZDT6 also provides an RTC, LCD support, analog functions, 10 serial ports, and a memory interface within a single integrated circuit. What is an ultra-low-power microcontroller? An ultra-low-power microcontroller is a semiconductor controller designed to execute firmware while minimizing energy consumption, particularly during idle, sleep, and standby periods. In the device hierarchy, the STM32L152ZDT6 is an Arm Cortex-M3 microcontroller, a 32-bit reduced-instruction-set processor platform, within the STM32 family of embedded processors and the broader category of embedded semiconductors. Its combination of USB connectivity, real-time-clock capability, analog functions, and low-power wake-up makes it suitable for connected embedded equipment that must balance responsiveness with restricted energy budgets. Key features include the 32 MHz Arm Cortex-M3 processor, 384 KB of Flash memory, and integrated USB connectivity. The 10 serial ports support multiple communication tasks without requiring a separate protocol controller. An RTC provides timekeeping for data logging, alarms, and scheduled operations, while LCD support can simplify instrument and human-interface designs. The manufacturer material also identifies analog functions, a memory interface, seven low-power modes, and an 8 μs wake-up time as defining characteristics of the STM32L152xD family. Technically, the STM32L152ZDT6 belongs to the STM32L1 low-power microcontroller family and supports operation at up to 32 MHz. Its extensive peripheral integration reduces the number of external devices required in USB-connected embedded products. The 144-LQFP package also provides a large pin count, supporting the family connectivity, analog, timing, and memory-interface functions. The supplied source data confirms the 384 KB Flash configuration but does not specify RAM capacity, exact analog converter performance, pin assignments, or detailed absolute maximum ratings; these values must be confirmed in the manufacturer documentation. Typical applications include low-power USB data loggers, industrial sensing nodes, battery-powered instruments, LCD-equipped control panels, and connected embedded accessories. In each case, the combination of USB, RTC, serial interfaces, analog functions, and fast wake-up can reduce board complexity. Designers should also evaluate whether the 384 KB Flash configuration is sufficient for the firmware image, USB stack, bootloader, diagnostics, and application data before committing to a PCB layout. A key design consideration is that firmware, USB enumeration, clock configuration, and low-power state transitions must be coordinated to obtain the intended energy profile. USB connection can influence whether the device remains in a low-power state, so the application should use the manufacturer's clock, GPIO, and low-power recommendations. Decoupling, exposed-pad or thermal considerations, and signal routing should be designed from the complete package documentation rather than inferred from the distributor summaries. This page consolidates verified distributor and manufacturer information, a 144-LQFP package identity, pricing evidence, application guidance, and a documented scarcity of verified drop-in alternatives. It also separates confirmed STM32L152ZDT6 characteristics from parameters that still require engineering verification, helping procurement and design teams make traceable engineering decisions without treating generic STM32 alternatives as automatic replacements.

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STM32L162QCH6 - 32MHz Cortex-M3 MCU | STMicroelectronics
STM32L162QCH6

STM32L162QCH6 - 32MHz Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L162QCH6 is an ultra-low-power, 32-bit ARM Cortex-M3 microcontroller with 256 KB of Flash memory, 32 MHz processing, and a 132-pin UFBGA package. It is designed for embedded systems that need a combination of low-power operation, USB connectivity, LCD support, analog conversion, cryptography, and a broad set of serial interfaces. An ultra-low-power microcontroller is a semiconductor device designed to minimize energy consumption during active operation, standby, and low-power modes. STM32L1 devices belong to the broader hierarchy of ARM Cortex-M3 microcontrollers, embedded processors, and semiconductor control components. This makes the STM32L162QCH6 relevant to battery-powered instruments, industrial controls, medical equipment, connected sensors, and compact human-interface systems. Verified listing data identifies a 32-bit Cortex-M3 core operating at 32 MHz, 256 KB Flash, 32 KB SRAM, and 8 KB EEPROM. The device also includes USB, LCD, ADC, DAC, and AES-128 hardware acceleration according to the available technical summaries. Its 2.5 V to 3.3 V supply description reflects a low-voltage embedded platform intended for efficient digital control and mixed-signal designs. The STM32L162QCH6 provides 132 package connections, allowing integration of multiple I/O resources and communication peripherals on a compact surface-mount footprint. The verified distributor listing identifies the package as 132-UFBGA, while another result describes the same device as a 132-pin package. The package pinout and exact electrical limits should be confirmed against the manufacturer datasheet before PCB release. Typical applications include USB-connected portable instruments, low-power sensor nodes, LCD-based user interfaces, industrial monitoring systems, and secure embedded controllers. Compared with a general-purpose Cortex-M3 MCU, the STM32L162 family is positioned around low-power operation and integrated features such as LCD, USB, DAC, and AES-128 support. Designers should preserve the manufacturer-recommended decoupling, clock, reset, and exposed-power connections. USB signal routing requires controlled impedance and short traces, while low-power and analog sections should be separated carefully to reduce noise coupling. Validate final firmware against the exact order code and package variant. This page consolidates verified distributor specifications, sourcing information, application guidance, and drop-in-alternative validation limits for STM32L162QCH6. It is intended to support engineering comparison, procurement review, and preliminary design work rather than replace the manufacturer datasheet or qualification process.

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STM32L162QDH6TR - 384KB Flash Cortex-M3 MCU | STMicroelectronics
STM32L162QDH6TR

STM32L162QDH6TR - 384KB Flash Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L162QDH6TR is an ultra-low-power ARM Cortex-M3 microcontroller with 384 Kbytes of Flash and 32 Kbytes of SRAM, housed in a 132-ball UFBGA (7x7 mm) package. It runs at up to 32 MHz, integrates an integrated LCD controller (up to 8x40 segments), USB 2.0 Full-Speed, AES-128 hardware encryption, and a rich analog/digital peripheral set, making it well suited to mid-RAM-profile battery-powered sensing and control applications. A Cortex-M3 microcontroller is a 32-bit ARM processor core (ARMv7-M architecture) with Thumb-2 instruction support, designed for deterministic embedded workloads with low interrupt latency. It sits in a hierarchy of MCU -> 32-bit MCU -> ARM Cortex-M -> low-power MCU, and the STM32L1 family specifically targets ultra-low-power applications consuming as little as sub-uA in standby while integrating rich analog peripherals that would normally require external ICs. Key features include ARM Cortex-M3 core running up to 32 MHz, 384 KB Flash, 32 KB SRAM, 12 KB EEPROM (true data EEPROM, emulated), an integrated USB 2.0 FS device/host/OTG controller, AES-128 hardware crypto block, two operational amplifiers, two 12-bit DACs, two 12-bit ADCs (1 Msps), two comparators, RTC, and seven low-power modes (Low-power Run, Sleep, Low-power Sleep, Stop with RTC, Standby with RTC, Standby). Operating voltage is 1.8 V to 3.6 V with BOR enable. The architecture combines a Cortex-M3 core, integrated voltage regulator with multiple low-power domains, an ART Accelerator-style flash front-end, and a flexible DMA matrix (7 channels). The peripheral set - timers (general-purpose, basic, systick), SPIs (3x), I2C (2x), USARTs (3x), USB, CAN, SDIO, and FSMC - is coherently mapped to a 132-pin BGA footprint that exposes up to 106 fast GPIOs. Typical applications include portable medical and health-monitoring devices, smart-metering and industrial sensor hubs, wearables, USB peripherals running from battery, secure IoT end-nodes leveraging the AES engine, and LCD-panel human-machine interfaces (HMIs). The 132-ball UFBGA is preferred over LQFP for space-constrained handhelds and wearables where every square millimeter matters. When designing with this part, pay close attention to decoupling: a 100 nF ceramic must sit within 2 mm of each VDD/VDDA pin pair, and the integrated regulator requires its own bulk + bypass network. The datasheet's application circuit shows a typical ultra-low-power sensor node with the MCU spending most of its time in Stop-mode with RTC, waking on a comparator interrupt for sub-uW average draw. This page synthesizes distributor pricing, drop-in alternatives in the same STM32L1 family, and practical design notes not consolidated on any individual manufacturer or distributor page.

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STM32L162RCT6 - Ultra-Low-Power ARM Cortex-M3 MCU | STMicroelectronics
STM32L162RCT6

STM32L162RCT6 - Ultra-Low-Power ARM Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L162RCT6 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 32 KB of SRAM, along with a rich set of peripherals including USB, LCD, and AES encryption. The device is housed in a 64-pin LQFP package, making it suitable for space-constrained applications. An ultra-low-power microcontroller (MCU) is a system-on-chip that integrates a processor core, memory, and peripherals, designed to minimize energy consumption while maintaining computational capability. The STM32L1 series is STMicroelectronics' flagship low-power family, targeting battery-powered and energy-harvesting applications. It sits within the broader hierarchy of embedded microcontrollers, which are the building blocks of IoT devices, portable medical equipment, and smart sensors. Key features of the STM32L162RCT6 include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Standby with RTC), a 12-bit ADC with 1 Msps, a 12-bit DAC, and an embedded AES-128 encryption engine. The device also integrates a real-time clock (RTC) with calendar and alarm functions, and supports a wide supply voltage range from 1.8V to 3.6V. The ultra-low-power design achieves a typical current consumption of 3.4 µA in Stop mode with RTC, and 0.27 µA in Standby mode. The STM32L162RCT6 is built on a 130nm low-leakage process technology, which is optimized for minimal static power consumption. The architecture includes a flexible clock tree with multiple internal and external oscillators, allowing designers to trade off performance for power. The AES hardware accelerator offloads cryptographic operations from the CPU, reducing energy consumption for secure communication. Typical applications include smart meters, medical devices (e.g., glucose monitors, hearing aids), industrial sensors, and portable consumer electronics. The integrated LCD controller supports up to 8x40 segments, making it ideal for battery-powered displays. The USB 2.0 full-speed device interface enables direct connectivity to hosts for data logging and firmware updates. When designing with this device, careful attention should be paid to the power supply decoupling and the selection of low-power modes to maximize battery life. The use of the internal low-speed oscillator (LSI) for the RTC can reduce external component count, but an external 32.768 kHz crystal provides better accuracy for timekeeping applications.

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STM32L162RET6 - Ultra-Low-Power ARM Cortex-M3 MCU | STMicroelectronics
STM32L162RET6

STM32L162RET6 - Ultra-Low-Power ARM Cortex-M3 MCU | STMicroelectronics

The STMicroelectronics STM32L162RET6 is an ultra-low-power 32-bit microcontroller based on the ARM Cortex-M3 core, operating at up to 32 MHz. It features 512 KB of Flash memory and 80 KB of SRAM, along with a rich set of peripherals including USB, LCD, and AES encryption. The device is housed in a 64-pin LQFP package (LQFP64) and is designed for battery-powered and energy-efficient applications. An ultra-low-power microcontroller (MCU) is a type of embedded processor optimized for minimal power consumption, often featuring multiple low-power modes, low supply voltages, and efficient clock management. These MCUs are essential in battery-operated devices, IoT sensors, and portable medical equipment where extending battery life is critical. The STM32L1 series sits within the broader STM32 family, which spans from low-power to high-performance Cortex-M based MCUs, and is part of the ARM Cortex-M ecosystem. Key features of the STM32L162RET6 include a 32 MHz ARM Cortex-M3 core with memory protection unit (MPU), 512 KB Flash, 80 KB SRAM, and a comprehensive set of peripherals: USB 2.0 full-speed device, LCD controller supporting up to 8x40 segments, AES-128 hardware encryption, 12-bit ADC, 12-bit DAC, multiple timers, and communication interfaces (USART, SPI, I2C). It operates from 1.8V to 3.6V supply and features several low-power modes: Sleep, Low-power Run, Low-power Sleep, Stop with RTC, and Standby, with current consumption as low as 0.3 uA in Standby mode. The STM32L162RET6 is built on ST's ultra-low-power technology, which combines a low-leakage process with dynamic voltage scaling and a flexible clock gating architecture. This enables the MCU to achieve industry-leading energy efficiency, with a typical active-mode current of 230 uA/MHz. The integrated AES-128 encryption engine provides hardware-accelerated security for data protection, making it suitable for secure communication and authentication applications. Typical applications include smart meters, medical devices (e.g., glucose monitors, hearing aids), industrial sensors, IoT nodes, and portable consumer electronics. The LCD controller and USB interface make it ideal for human-machine interface (HMI) applications, while the AES engine supports secure data logging and communication. 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 at the main supply. Use the low-power modes effectively by configuring the RTC and wake-up sources to minimize average current consumption. The STM32L162RET6 is available in LQFP64 package, which is pin-compatible with other STM32L1 series devices in the same package, allowing easy migration.

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STM32L162VCT6 - 32MHz Cortex-M3 256KB MCU | STMicroelectronics
STM32L162VCT6

STM32L162VCT6 - 32MHz Cortex-M3 256KB MCU | STMicroelectronics

The STMicroelectronics STM32L162VCT6 is an ultra-low-power 32-bit microcontroller built around a 32 MHz Arm Cortex-M3 core, with 256 KB of embedded Flash memory and USB connectivity in a 100-pin LQFP package measuring 14 x 14 mm. The STM32L162 is positioned for connected low-power embedded products that require secure data handling, efficient peripheral integration, and a broad supply-voltage range. According to the manufacturer product page, the STM32L162 family adds 128-bit AES hardware encryption to the STM32L151 and STM32L152 feature set. The device is identified in distributor data as the STM32L1 series member with LCD and USB capability, making it suitable for compact user-interface, security, data-acquisition, and connected-control systems. Its 256 KB program-memory configuration provides more application-code headroom than entry-level STM32L1 devices while retaining the low-power characteristics of the family. The Cortex-M3 processor uses the ARM Thumb instruction set and provides deterministic interrupt handling for real-time peripherals, sensor interfaces, communications links, and display updates. Verified distributor records identify the device as an ARM Cortex-M3 microcontroller operating at 32 MHz with 256 KB of Flash in a 100-LQFP industrial package. Electrical operating details such as exact RAM capacity, complete voltage limits, temperature range, and peripheral pin assignments are not included in the supplied source extract and should be confirmed against the manufacturer datasheet before design release. This STM32L162VCT6 combines a high-clock-rate 32-bit core with integrated cryptographic hardware and USB in a surface-mount LQFP-100 package. The 14 x 14 mm footprint supports mainstream automated assembly while exposing substantially more I/O than smaller 48-pin and 64-pin STM32 devices. It is therefore relevant to LCD-equipped instruments, industrial controllers, low-power data loggers, USB-connected sensors, secure access terminals, and compact gateways requiring more GPIO than an entry-level microcontroller package can provide. STM32L162VCT6 - 32MHz Cortex-M3 256KB MCU | STMicroelectronics. The main design trade-off is package size: compared with a smaller STM32L1 option, the LQFP-100 offers broader peripheral access but demands a larger PCB footprint and more careful high-speed signal layout. Compared with larger STM32F devices, it provides lower-power-oriented integration and on-chip AES support, while its 256 KB Flash capacity is more limited than high-end Cortex-M families. For USB or LCD designs, use the datasheet pin table and reference design guidance to plan decoupling, signal routing, firmware support, and peripheral conflicts. This page consolidates distributor data, manufacturer positioning, same-family drop-in candidates, and practical selection guidance that is not presented as a single consolidated value in the manufacturer datasheet.

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STM32L162VET6 - 512KB Flash Ultra-Low-Power MCU | STMicroelectronics
STM32L162VET6

STM32L162VET6 - 512KB Flash Ultra-Low-Power MCU | STMicroelectronics

The STM32L162VET6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M3 core running at up to 32 MHz. It integrates 512 KB of Flash memory and 80 KB of SRAM, along with a rich set of peripherals including USB, LCD controller, AES encryption, and multiple communication interfaces. Housed in a 100-pin LQFP package, this device is designed for battery-powered and energy-efficient 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 STM32L1 series is STMicroelectronics' flagship ultra-low-power family, positioned within the broader hierarchy of microcontrollers -> 32-bit MCUs -> ARM Cortex-M based MCUs -> STM32 family. These devices are essential in IoT, wearable, and portable medical devices where energy efficiency is critical. Key features include multiple low-power modes (Sleep, Low-power Run, Low-power Sleep, Stop with RTC, Standby with RTC), a 12-bit ADC with hardware oversampling, a 12-bit DAC, an LCD driver supporting up to 8x40 segments, and an AES-128 hardware encryption engine. The device operates from 1.8V to 3.6V and supports a wide temperature range of -40°C to +85°C. Its ultra-low-power design achieves 230 µA/MHz in Run mode and 0.3 µA in Standby mode with RTC, making it ideal for energy-harvesting and long-life battery applications. The STM32L162VET6 is built on a 130nm ultra-low-leakage process technology, enabling industry-leading power efficiency. The Cortex-M3 core includes a memory protection unit (MPU) and supports single-cycle multiplication and hardware division. The device features a flexible clock tree with multiple internal and external oscillators, including a 32 kHz RTC oscillator and a 16 MHz HSI RC oscillator, allowing designers to optimize performance versus power consumption. Typical applications include smart meters, medical devices such as glucose monitors and hearing aids, industrial sensors, and portable consumer electronics. The integrated LCD controller and AES encryption make it particularly suitable for secure, display-equipped battery-powered devices. The USB 2.0 full-speed interface with internal PHY enables direct connectivity to hosts for data logging and firmware updates. When designing with this MCU, careful attention to the power supply decoupling and clock configuration is essential. Use a 1 µF and 100 nF capacitor pair on each VDD pin, and select the appropriate low-power mode based on wake-up latency requirements. The STM32L162VET6 supports in-application programming (IAP) via USART, SPI, or USB, facilitating field firmware updates.

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STM32L162ZD - 384KB Flash Cortex-M3 MCU w/ LCD | STMicro
STM32L162ZD

STM32L162ZD - 384KB Flash Cortex-M3 MCU w/ LCD | STMicro

The STMicroelectronics STM32L162ZD is an ultra-low-power Arm Cortex-M3 microcontroller with 384 Kbytes of Flash memory, 32 MHz CPU, integrated LCD driver, USB 2.0 full-speed, three operational amplifiers, and hardware AES-128 encryption, packaged in a 144-pin LQFP (20x20 mm). It belongs to the STM32L1 series, designed for energy-sensitive applications where sleep-mode current and active-mode efficiency are critical design parameters. A microcontroller (MCU) is a single-chip computer integrating a CPU core, Flash program memory, SRAM data memory, and a rich set of peripherals such as timers, ADC/DAC, communication interfaces (UART/SPI/I2C/USB/CAN), and I/O ports. The STM32L1 family is built around the Cortex-M3 core and is positioned as an ultra-low-power platform — sitting in the broader hierarchy of ARM Cortex-M MCUs -> 32-bit microcontrollers -> embedded processors. The STM32L162ZD specifically adds USB, AES, LCD segment driver, three rail-to-rail op-amps, and 12 Kbytes of true EEPROM emulation on top of 48 Kbytes SRAM. Key features include 384 Kbytes of Flash, 48 Kbytes of SRAM, 12 Kbytes of EEPROM, Cortex-M3 with FPU-less MPU running up to 32 MHz, up to 114 general-purpose I/Os, a 12-bit ADC (1 Msps), two 12-bit DACs, two comparators, two op-amps (plus one more for signal conditioning), a segment LCD driver supporting up to 8x40 segments, USB FS device, three I2C, two SPI, three USART plus two UARTs, one CAN, AES-128 hardware crypto, and a real-time clock with calendar. The seven main low-power modes (Sleep, Low-power sleep, Stop with RTC, Standby with RTC, Stop without RTC, Standby without RTC, and Power-down) draw as little as a few microamperes with RTC retention. The STM32L162 line uses a 1.8 V to 3.6 V supply range and is engineered around the ST ultra-low-leakage 130 nm process with on-chip voltage scaling. The integrated op-amps and comparators remove the need for external analog front-end circuitry in sensor-conditioning applications, while the AES block accelerates encrypted communication without loading the CPU. The flexible static memory controller (FSMC) enables external SRAM/NOR/NAND expansion when design requirements exceed the on-chip 384 Kbytes. Typical applications include battery-powered IoT nodes, portable medical monitors, smart meters, industrial sensor hubs, USB peripherals, and LCD-keypad user-interface modules. The combination of op-amps, ADC, DAC, and AES makes it especially suitable for secure wireless sensor nodes (paired with an external RF transceiver) and battery-backed metering systems with segmented LCD displays. When designing with this MCU, provide a clean 3.3 V LDO and place decoupling capacitors (100 nF + 4.7 uF bulk) within 5 mm of every VDD/VSS pair. The BOOT0 pin must be pulled correctly for production firmware boot, and unused I/Os should be configured as analog inputs to minimize leakage. Note that operating frequency at full 32 MHz requires VDD >= 2.1 V to stay within the voltage-scaling range. This page consolidates distributor pricing for the STM32L162ZD, identifies verified drop-in alternatives in the STM32L1 family and across-brand second sources, and packages practical design notes (decoupling, low-power mode entry/exit, op-amp biasing) that go beyond what the manufacturer datasheet alone provides.

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STM32L162ZDT6 - 32MHz Cortex-M3 MCU 384KB Flash USB AES | STMicroelectronics
STM32L162ZDT6

STM32L162ZDT6 - 32MHz Cortex-M3 MCU 384KB Flash USB AES | STMicroelectronics

The STMicroelectronics STM32L162ZDT6 is an ultra-low-power ARM Cortex-M3 32-bit microcontroller with 384KB Flash, 32 MHz CPU, USB 2.0 full-speed, hardware AES-128, segment LCD driver, RTC and 144-pin LQFP package. According to ST product documentation, the part integrates 384 KB of Flash, 48 KB of SRAM, 12-bit ADC, 12-bit DAC, multiple comparators, USB, USART, SPI, I2C, timers and AES, all in a 20x20 mm 144-LQFP. What is an ultra-low-power microcontroller? An ultra-low-power microcontroller is a category of embedded MCU optimized to consume the least energy in active and sleep modes. It belongs to the broader taxonomy microcontroller -> embedded processor -> semiconductor device. The STM32L1 family positions itself for battery-powered applications where every microamp counts, including metering, medical portables, IoT sensors and wearable electronics. Key features include 7 low-power modes, RTC with backup registers, integrated LCD driver up to 8x40, AES-128 hardware accelerator, USB 2.0 full-speed device with on-chip PHY, 12-bit ADC and DAC, multiple comparators, and up to 114 general-purpose I/Os on the 144-LQFP variant. The ARM Cortex-M3 core runs at 32 MHz, providing 1.25 DMIPS/MHz while drawing roughly 230 uA/MHz active, an order of magnitude lower than legacy Cortex-M3 microcontrollers. The device is built on a 130 nm ultra-low-leakage CMOS process with embedded Flash, and supports 1.8 V to 3.6 V supply operation. The architecture includes a nested vectored interrupt controller, bit-banding, MPU, and JTAG/SWD debug interfaces. Hardware AES-128 accelerates encryption with zero CPU load, while the LCD controller with charge pump drives segment displays directly. Typical applications include battery-powered medical instruments, wireless sensor nodes, smart metering, industrial control with HMI segment displays, asset tracking, and USB-enabled data loggers. The 384 KB Flash supports rich application firmware with over-the-air upgrade capability and protocol stacks such as USB, BLE through SPI, or LoRaWAN via external transceiver. When designing with the STM32L162ZDT6, carefully select the appropriate low-power mode (Stop, Standby, Sleep) based on wake-up latency and residual current budget. The USB peripheral requires a 1.5 kohm pull-up and proper PCB stack-up for signal integrity; the AES engine uses 128-bit key only. This page synthesizes distributor pricing, parametric comparison, and drop-in alternatives not found in the manufacturer datasheet. Engineers should cross-check the latest datasheet revision and errata before committing to a design.

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STM32L412C8T6 - 80MHz Cortex-M4 MCU 64KB LQFP-48 | STMicroelectronics
STM32L412C8T6

STM32L412C8T6 - 80MHz Cortex-M4 MCU 64KB LQFP-48 | STMicroelectronics

The STMicroelectronics STM32L412C8T6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with FPU, operating at up to 80 MHz and packaged in a 48-pin LQFP (T6) form factor. It integrates 64 Kbytes of Flash, 40 Kbytes of SRAM, and the STM32L4 family's signature FlexPowerControl architecture with an operating voltage range of 1.71 V to 3.6 V. What is an ultra-low-power Cortex-M4 MCU? This category of microcontroller combines a high-performance 32-bit Arm processing core (Cortex-M4 with single-precision FPU and DSP extensions) with extensive power-saving modes that allow it to draw microamps or even nanoamps in standby. In the broader semiconductor taxonomy, it sits below MCU > microcontroller > 32-bit embedded controller > semiconductor. STM32L412 parts target battery-powered and energy-harvesting designs where the M4's DSP/Math throughput is required but quiescent current must remain in the nA range. Key features of the STM32L412C8T6 include a USB 2.0 Full-Speed device interface (no host/OTG), up to 12 timers, a 12-bit ADC with up to 16 channels (5 Msps), two 12-bit DACs, two comparators, two operational amplifiers, a real-time clock with calendar, and 32x32-bit backup registers. ST's Chrom-GRC advanced peripherals also include an AES-256 hardware crypto accelerator and a true random number generator (TRNG) for IoT security. The architecture pairs a Cortex-M4 core running at 80 MHz (100 DMIPS / 273 CoreMark) with ST's low-power process technology. Seven low-power modes (including Shutdown at 16 nA typical, Standby at 300 nA typical, and VBAT mode at 300 nA for RTC retention) let system designers trade wake-up latency against quiescent current. The on-chip voltage regulator scales dynamically with load, and VBAT mode retains RTC and backup registers directly from a coin cell. Typical applications include battery-powered IoT sensor nodes, USB-C HID interfaces, wearable health monitors, industrial wireless sensors, asset tracking beacons, smart metering, and human-machine interface (HMI) controllers. The FPU and DSP extensions make it well suited for compact digital signal processing such as sensor fusion and predictive maintenance algorithms. When designing with this part, prioritize decoupling the VDDA supply with a 100 nF X5R ceramic placed within 2 mm of the pin. Ensure SWDIO/SWDCLK lines are routed short and away from switching nodes to avoid debug-acquisition noise. This page synthesizes real distributor pricing, drop-in compatible alternatives (same-brand STM32L4 family and cross-brand pin-compatible parts), and design notes not aggregated on a single manufacturer page.

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STM32L412CBU6 - 80MHz Cortex-M4 128KB Flash MCU | STMicroelectronics
STM32L412CBU6

STM32L412CBU6 - 80MHz Cortex-M4 128KB Flash MCU | STMicroelectronics

The STMicroelectronics STM32L412CBU6 is an ultra-low-power 32-bit ARM Cortex-M4 microcontroller with FPU, operating at up to 80 MHz, integrating 128 KB of Flash and 40 KB of SRAM in a 48-pin UFQFPN (7x7 mm) package. It targets battery-powered and energy-harvesting applications where every microamp counts, featuring FlexPowerControl with a 1.71V to 3.6V supply range and a 16 nA Shutdown current with four wakeup pins. An ARM Cortex-M4 microcontroller is a 32-bit RISC processor core designed for embedded systems, combining high computational performance with low power consumption. The Cortex-M4 specifically adds a single-precision floating-point unit (FPU) and DSP extensions, making it suitable for signal-processing tasks. The STM32L4 family further extends the architecture with ultra-low-power techniques (FlexPowerControl), placing it in the broader hierarchy of microcontroller -> embedded processor -> semiconductor device, optimized for IoT and wearable segments. Key features include a Cortex-M4 core with FPU delivering 100 DMIPS, 128 KB Flash with ECC, 40 KB SRAM, USB 2.0 Full-Speed with crystal-less operation, two DACs, one 12-bit ADC (5 Msps), two comparators, two operational amplifiers, and a built-in SMPS step-down converter for internal core supply. The UFQFPN-48 footprint integrates 38 GPIO pins supporting I2C, SPI, USART, LPUART, USB and CAN interfaces. The SMPS bypass mode enables direct core supply from a coin-cell or super-capacitor backup domain, while the VBAT mode retains 32x32-bit backup registers and the RTC drawing only 300 nA. Housed in a UFQFPN-48 package with a small 7x7 mm body, the device also features a true random number generator (TRNG), 128-bit AES hardware accelerator, and capacitive touch sensing support. Typical applications include wearable health sensors, low-end smart watches, industrial sensor nodes, USB-powered devices, smart metering, and battery-powered IoT endpoints. The combination of Cortex-M4 performance and sub-microamp standby modes makes the part particularly suited to products that wake briefly to perform a measurement, then return to deep sleep. When laying out the PCB, ensure the UFQFPN-48 exposed pad is soldered to a properly sized ground plane with thermal vias to limit junction temperature. Decouple VDD with 100 nF + 1 uF ceramics close to each supply pin, and follow ST reference designs for the SMPS inductor selection if the internal regulator is used.

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STM32L412K8T6 - 80MHz Cortex-M4 64KB MCU | STMicroelectronics
STM32L412K8T6

STM32L412K8T6 - 80MHz Cortex-M4 64KB MCU | STMicroelectronics

The STMicroelectronics STM32L412K8T6 is an ultra-low-power 32-bit microcontroller built around an Arm Cortex-M4 processor operating up to 80 MHz, with 64 KB of Flash and a 32-LQFP 7 x 7 mm package. It operates from a 1.71 V to 3.6 V supply and supports temperature ranges of -40 °C to 85 °C or -40 °C to 125 °C, depending on the ordering variant. The STM32L412K8T6 combines low-power operation, USB connectivity, and a compact 32-pin surface-mount footprint for embedded control designs. What is an ultra-low-power microcontroller? An MCU is an integrated semiconductor that contains a processor core, Flash memory, RAM, peripherals, and communication interfaces on one device. An ultra-low-power MCU adds optimized sleep, shutdown, and low-current operating modes to extend battery life in portable, sensor, and industrial monitoring systems. The STM32L412K8T6 belongs to the STM32L4 microcontroller family and is designed for applications requiring low power consumption and efficient real-time control. The STM32L412K8T6 provides an Arm Cortex-M4 core with floating-point capability, operating at up to 80 MHz. The verified product data identifies 64 KB Flash memory and a 32-LQFP package. Its supply range of 1.71 V to 3.6 V supports low-voltage designs, while the documented VBAT mode consumes 300 nA for RTC and backup-register operation. Shutdown mode is specified at 16 nA with four wakeup pins, making the device suitable for applications that spend most of their time in low-power states. Typical embedded applications include low-power sensor nodes, USB-connected control devices, industrial monitoring systems, portable instrumentation, and connected battery-powered products. The Arm Cortex-M4 platform provides a broad software ecosystem and supports efficient control workloads, while USB connectivity enables data exchange with a host device. Exact peripheral details, flash programming requirements, package dimensions, and electrical limits should be confirmed in the STMicroelectronics STM32L412xx datasheet before final schematic and PCB release. The principal design consideration is matching the device voltage range and low-power mode requirements to the battery or supply topology. Designers should confirm USB transceiver requirements, clock and reset implementation, decoupling, exposed programming access, and thermal conditions against the manufacturer documentation. For replacement decisions, verify pin compatibility, memory capacity, peripheral availability, temperature grade, and firmware support rather than relying on nominal Cortex-M4 equivalence alone. This product record combines verified distributor identity, manufacturer device information, pricing references, application guidance, and explicit uncertainty markers. It is intended to support engineering selection and sourcing while avoiding assumptions about unprovided electrical, package, or lifecycle details.

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STM32L412RBT6P - 80MHz Cortex-M4 MCU 128KB Flash LQFP-64 | STMicroelectronics
STM32L412RBT6P

STM32L412RBT6P - 80MHz Cortex-M4 MCU 128KB Flash LQFP-64 | STMicroelectronics

The STMicroelectronics STM32L412RBT6P is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller operating at up to 80 MHz with FPU and 100 DMIPS, integrating 128 KB of single-bank Flash memory and 40 KB of SRAM in a 64-pin LQFP (10x10 mm) package. The 'P' suffix denotes a specific tape-and-reel orientation variant offered in the same silicon and footprint as the standard STM32L412RBT6. The Cortex-M4 core is paired with a single-precision floating-point unit, an external SMPS support rail, and ST's ultra-low-power family peripherals. A microcontroller (MCU) is a complete computer-on-a-chip that integrates a CPU core, volatile and non-volatile memory, programmable I/O, timers, communication peripherals, and analog blocks into a single IC. MCU sits within the hierarchy: microcontroller -> embedded processor -> semiconductor -> integrated circuit. The Cortex-M4 family specifically targets mixed-signal and DSP-capable embedded applications where deterministic real-time performance is required, and the STM32L4 sub-family adds ultra-low-power operating modes for battery-powered products. Key features of the STM32L412RBT6P include 1.71 V to 3.6 V supply range, a 12-bit ADC with 5 Msps, two 12-bit DAC channels, three I2C, three SPI, three USART, one UART, one USB 2.0 full-speed device (with dedicated 48 MHz oscillator), one CAN 2.0B, and a True Random Number Generator (TRNG). On-chip peripherals also include four general-purpose 16-bit timers, two 16-bit low-power timers, two watchdog timers, RTC with calendar and alarm, and SysTick timer. The device supports four low-power modes: Shutdown (30 nA typical), Standby (120 nA), Stop with RTC (420 nA), and Sleep, all wake-up latency is under 8 us. The architecture uses ST's 90 nm ultra-low-leakage CMOS process with the ART Accelerator prefetch buffer that allows the core to operate at full 80 MHz even with low Flash access time. An integrated SMPS step-down converter and LDO regulator allow the device to internally generate Vcore while accepting a single supply input, reducing external BOM. The dedicated VBAT input enables RTC and backup-register retention from a coin cell when main VDD is removed. Typical applications include wearable fitness bands, IoT sensor nodes, smart metering, medical insulin pumps, industrial HMI panels, asset tracking modules, and USB-C powered human-interface devices. The 64-pin LQFP footprint is well-suited for hand-solderable prototypes and small-run industrial modules. Designers should configure unused I/O pins as analog inputs to minimize leakage and select the right low-power mode (Sleep, Low-Power Sleep, Stop 0/1/2, Standby, Shutdown) to balance wake-up latency against quiescent draw. Decoupling: place 100 nF + 4.7 uF bulk within 3 mm of the VDD pins, route VDD12 (SMPS output) with 2 oz copper to minimize ripple. The internal SMPS must be enabled via option bytes and requires a ferrite bead or filter on its VDD12 pin for clean operation. This page synthesizes distributor pricing, parametric drop-in alternatives, and practical low-power design notes that are not consolidated in the manufacturer datasheet, including same-package STM32L412R family variants and competitor options.

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STM32L422CBU6 - 80MHz Cortex-M4 MCU | STMicroelectronics
STM32L422CBU6

STM32L422CBU6 - 80MHz Cortex-M4 MCU | STMicroelectronics

STMicroelectronics STM32L422CBU6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with FPU, operating up to 80 MHz and containing 128 KB of flash memory in a 48-pin UFQFPN package measuring 7 x 7 mm. The STM32L422CBU6 combines a 128K x 8 flash configuration, 40 KB of RAM, USB connectivity, and a compact surface-mount footprint for embedded control designs. A microcontroller is a programmable system-on-chip used to acquire sensor data, execute control algorithms, manage communications, and supervise peripheral functions. The STM32L4 series sits within the Arm Cortex-M4 microcontroller hierarchy, combining a low-power RISC architecture with integrated memory, communications peripherals, and direct GPIO access. Such devices serve as the central processing elements in sensors, industrial controllers, portable instruments, and connected products. Key features of the STM32L422CBU6 include an Arm Cortex-M4 core with an FPU, operation up to 80 MHz, 128 KB of embedded flash, and 40 KB of SRAM. The floating-point unit supports efficient arithmetic in control, signal-processing, and sensor-oriented firmware. USB connectivity expands the device's suitability for USB-connected data acquisition, configuration interfaces, and peripheral adapters, while the 48-pin package limits board area without eliminating pin-level customization. The STM32L422CBU6 is identified as an STM32L422CB variant and belongs to STMicroelectronics' ultra-low-power STM32L4 family. At 80 MHz, the core provides substantially more processing headroom than lower-frequency microcontrollers while retaining a focused embedded feature set. The verified manufacturer datasheet describes an Arm Cortex-M4 processor with FPU, and the product-page search result confirms operation up to 80 MHz. Detailed electrical limits, clock-tree settings, peripheral conditions, and current-consumption figures must be checked in the manufacturer datasheet before final qualification. Typical uses include low-power sensor nodes, USB data-acquisition devices, compact industrial controllers, portable measurement equipment, and embedded gateways. A design can use the Cortex-M4 FPU for filtering and control calculations, the 128 KB flash for application firmware, and the USB interface for configuration or data transfer. The 7 x 7 mm UFQFPN package also suits space-constrained boards where a smaller alternative in the same family is not required. Board design should account for all 48 exposed pads, the required support network, decoupling, programming access, clock implementation, and exposed-pad thermal requirements. Verify the exact alternate-pin and exposed-pad assignment against the official STM32L422xx datasheet rather than relying on a generic QFN footprint. Firmware selection, USB peripheral configuration, clock tolerances, and low-power transitions should also be validated together because each affects the final power budget and real-time behavior. This product record combines verified manufacturer and distributor data, same-package replacement guidance, interface-focused application context, and practical design cautions. It provides a concise engineering reference for comparing the STM32L422CBU6 with related STM32L4 devices while clearly identifying details that require confirmation from the official datasheet.

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STM32L422KBT6 - 80MHz Cortex-M4 128KB MCU | STMicroelectronics
STM32L422KBT6

STM32L422KBT6 - 80MHz Cortex-M4 128KB MCU | STMicroelectronics

The STMicroelectronics STM32L422KBT6 is an ultra-low-power 32-bit microcontroller based on the Arm Cortex-M4 core with FPU, operating up to 80 MHz and integrating 128 KB of Flash memory, 40 KB of SRAM, USB, and a 12-bit ADC in a 32-LQFP 7 x 7 mm package. The STM32L422KBT6 combines an 80 MHz processing core with 128 KB of program Flash and USB connectivity in a compact surface-mount LQFP package. An ultra-low-power microcontroller is a semiconductor category designed to maintain processing capability while minimizing energy consumption during active, idle, sleep, and shutdown operating states. The STM32L4 family belongs to the MCU hierarchy, joining 32-bit embedded processors with energy-efficient peripherals for battery-operated, industrial, medical, communications, and consumer equipment. This combination of local processing, low-power behavior, and integrated USB supports designs that need compactness without a separate protocol controller. Verified product information identifies an Arm Cortex-M4 processor with FPU, operation up to 80 MHz, 128 KB of Flash, 40 KB of SRAM, USB, a 12-bit ADC, and a -40 °C to +85 °C temperature range. The FPU accelerates suitable floating-point operations, while the SRAM and Flash allocation provides room for application code, buffers, protocol stacks, and boot or configuration data. The 32-LQFP package is also less mechanically dense than many fine-pitch alternatives while remaining suitable for automated assembly. The STM32L4 architecture combines a high-performance Cortex-M4 core with low-power operating modes and integrated communication peripherals. USB support allows the MCU to connect directly as a USB device or implement USB-facing control and data-transfer functions. The exact pin multiplexing, USB electrical characteristics, clock configuration, and peripheral set should be confirmed against the manufacturer datasheet and the complete STM32L422xx pinout before final PCB signoff. Typical uses include compact USB-connected data loggers, industrial condition-monitoring nodes, portable medical and laboratory instruments, low-power sensor controllers, and USB-to-serial or configuration accessories. In each case, the 80 MHz Cortex-M4 core provides useful real-time processing headroom, while the 128 KB Flash and 40 KB SRAM support moderate firmware complexity. Designers should also evaluate supply voltage, current budget, clock tree, peripheral availability, and USB implementation requirements for the intended operating environment. A key design consideration is package-level planning. Although the 32-LQFP footprint simplifies inspection and rework compared with fine-pitch QFN or BGA packages, it requires careful escape routing for USB, oscillators, decoupling, programming access, and any exposed analog functions. Place input and output capacitors according to the manufacturer recommendations, preserve USB impedance-controlled routing, and confirm all required pins are available on the selected 32-pin variant. This product page consolidates verified manufacturer and distributor information, practical application guidance, package details, and same-family drop-in alternatives. It is intended to support engineering selection and sourcing decisions while clearly separating confirmed values from details that still require review in the complete manufacturer documentation.

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STM32L422RBI6 - 80MHz Cortex-M4 128KB MCU | STMicroelectronics
STM32L422RBI6

STM32L422RBI6 - 80MHz Cortex-M4 128KB MCU | STMicroelectronics

STMicroelectronics STM32L422RBI6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with FPU, operating up to 80 MHz, with 128 KB of Flash memory and 40 KB of RAM in a 64-UFBGA 5x5 mm package. The device operates from a 1.71 V to 3.6 V supply and supports USB connectivity for compact embedded systems requiring efficient processing, low standby consumption, and a small package footprint. An ultra-low-power microcontroller is an embedded processing IC optimized for long periods of low activity, restricted supply current, and rapid reactivation. The STM32L4 family belongs to the microcontroller hierarchy, combining an Arm Cortex-M processor core, embedded nonvolatile Flash, static RAM, peripherals, and communication interfaces in one device. Its low-power operating modes are especially useful in battery-powered equipment where sleep current can dominate the system energy budget. The STM32L422RBI6 provides 128 KB of Flash for firmware and 40 KB of RAM for working data and peripheral buffers. Its Cortex-M4 core operates at up to 80 MHz and includes a floating-point unit for control, sensor, and signal-processing workloads. The device also provides USB connectivity, allowing a compact design to implement USB communication without adding a separate interface controller. The STM32L4 power architecture supports operation across multiple low-energy states. Verified family data lists 300 nA in VBAT mode for the RTC and 32x32-bit backup registers, 16 nA in shutdown mode with four wakeup pins, 32 nA in standby mode with four wakeup pins, and 245 nA in standby mode with RTC enabled. These figures make the device suitable for systems that spend most of their operating life in a low-power state. Typical uses include compact USB-connected data loggers, industrial sensor nodes, building controls, portable instruments, and low-power embedded accessories. The 80 MHz processor provides useful computational margin for control loops and protocol handling, while the 64-UFBGA package supports space-constrained board layouts. USB can simplify host-device connectivity when the enclosure and cable requirements are otherwise conventional. Designers should account for the small 5x5 mm ball-grid package during PCB assembly and inspection. The 1.71 V to 3.6 V supply range requires rail design compatible with the selected external components, and low-power performance depends on avoiding unintended GPIO states and leakage paths. Verify wakeup behavior and USB signal routing against the manufacturer datasheet before production release. This product page combines verified manufacturer specifications, distributor pricing, package information, purchasing guidance, and an engineering-oriented replacement analysis. It distinguishes the available same-package option from broader functional alternatives so procurement and design teams can assess footprint compatibility without confusing interchangeable functions with true drop-in replacements.

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STM32L431CBT6 - ARM Cortex-M4 80MHz MCU | STMicroelectronics
STM32L431CBT6

STM32L431CBT6 - ARM Cortex-M4 80MHz MCU | STMicroelectronics

The STM32L431CBT6 is a 32-bit ARM Cortex-M4 microcontroller from STMicroelectronics, featuring a floating-point unit (FPU) and operating at a maximum frequency of 80 MHz. It is part of the STM32L4 series, designed for ultra-low-power applications with a rich set of peripherals. The device is housed in a 48-pin LQFP package (7x7 mm) and offers 128 KB of flash memory and 64 KB of SRAM. 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 SRAM), and programmable input/output peripherals on a single chip. Microcontrollers are the brains of countless electronic devices, from automotive engine control units to IoT sensors and wearable health monitors. The STM32L431CBT6 belongs to the STM32L4 family, which is optimized for low power consumption without compromising performance, making it ideal for battery-powered and energy-harvesting applications. Key features of the STM32L431CBT6 include an ARM Cortex-M4 core with FPU, 80 MHz maximum clock speed, 128 KB flash, 64 KB SRAM, and a comprehensive set of peripherals such as multiple USARTs, SPIs, I2Cs, ADCs, DACs, timers, and a real-time clock. It also integrates a true random number generator (RNG), a CRC calculation unit, and a memory protection unit (MPU). The device supports a wide supply voltage range from 1.71V to 3.6V and operates over a temperature range of -40°C to +85°C. Technically, the STM32L431CBT6 leverages the ARM Cortex-M4 architecture with DSP instructions and a single-precision FPU, enabling efficient digital signal processing. The STM32L4 series is built on a low-power process technology, achieving ultra-low power consumption in run, sleep, and standby modes. The device includes multiple low-power modes, such as Sleep, Low-power run, Low-power sleep, Stop 0/1/2, and Standby, allowing designers to optimize energy usage based on application requirements. Typical applications include industrial sensors, IoT devices, smart home controllers, portable medical devices, and battery management systems. The combination of low power, high performance, and rich peripherals makes it suitable for applications requiring both computational capability and energy efficiency. When designing with this MCU, pay attention to power supply decoupling and proper grounding. Use a 100nF capacitor close to each VDD pin and a 4.7uF bulk capacitor. For low-power modes, configure the clock system and peripheral clocks appropriately to minimize current consumption. The STM32L431CBT6 supports in-circuit programming and debugging via SWD, facilitating firmware development. 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 STM32L431CBT6.

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STM32L431RCT6 - Ultra-Low-Power Cortex-M4 MCU 80MHz 256KB Flash | STMicroelectronics
STM32L431RCT6

STM32L431RCT6 - Ultra-Low-Power Cortex-M4 MCU 80MHz 256KB Flash | STMicroelectronics

The STM32L431RCT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core with floating-point unit (FPU). It operates at a frequency of up to 80 MHz and provides 256 KB of Flash memory and 64 KB of SRAM, making it suitable for a wide range of energy-efficient embedded applications. The device is housed in a 64-pin LQFP package (10x10 mm) and is part of the STM32L4 series, which is designed for low-power operation without compromising performance. A microcontroller (MCU) is a compact integrated circuit designed to govern a specific operation in an embedded system. It contains a processor core, memory, and programmable input/output peripherals. The STM32L431RCT6 belongs to the STM32L4 family, which is part of the broader STM32 portfolio of 32-bit microcontrollers. These MCUs are widely used in industrial, consumer, and IoT applications where power efficiency and processing capability are critical. The Cortex-M4 core with FPU enables efficient digital signal processing and floating-point arithmetic, making it ideal for applications such as motor control, sensor fusion, and audio processing. Key features of the STM32L431RCT6 include its ultra-low-power modes, which allow it to achieve very low power consumption in standby and sleep modes, extending battery life in portable devices. It also integrates a rich set of peripherals, including multiple USARTs, SPIs, I2Cs, ADCs, DACs, timers, and a real-time clock. The device supports a wide operating voltage range of 1.71V to 3.6V, making it compatible with standard battery chemistries. Additionally, it features a 12-bit ADC with up to 16 channels, a 12-bit DAC, and an operational amplifier, enabling analog signal processing without external components. From a technical perspective, the STM32L431RCT6 leverages ST's advanced 90nm process technology, which contributes to its low power consumption and high performance. The core runs at up to 80 MHz, delivering 100 DMIPS (Dhrystone 2.1) performance. The device includes a memory protection unit (MPU) and a nested vectored interrupt controller (NVIC) for efficient interrupt handling. It also supports a wide range of communication interfaces, including USB 2.0 full-speed, CAN 2.0B, and SAI (serial audio interface), making it versatile for connectivity applications. Typical applications for the STM32L431RCT6 include industrial sensors, smart meters, portable medical devices, and IoT nodes. Its low-power characteristics make it particularly well-suited for battery-powered devices that require long operational lifetimes. The device also supports a variety of development tools, including STM32CubeIDE, STM32CubeMX, and the STM32CubeL4 firmware package, which simplifies software development and reduces time-to-market. When designing with the STM32L431RCT6, it is important to consider the power supply decoupling and PCB layout to ensure stable operation. The device requires a 100nF capacitor on each power pin and a 4.7uF capacitor on the main supply. Additionally, the VDDA pin should be connected to a clean analog supply to minimize noise in analog peripherals. Proper grounding and layout are essential to achieve the specified performance and low-power operation.

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STM32L432KCU6 - 80MHz Cortex-M4 MCU 256KB Flash | STMicroelectronics
STM32L432KCU6

STM32L432KCU6 - 80MHz Cortex-M4 MCU 256KB Flash | STMicroelectronics

The STMicroelectronics STM32L432KCU6 is an ultra-low-power 32-bit microcontroller based on the Arm Cortex-M4 core with FPU and DSP instructions, operating at up to 80 MHz, with 256 KB of Flash memory and 64 KB of SRAM, housed in a 32-pin UFQFPN (5x5 mm) package. An Arm Cortex-M4 microcontroller is a 32-bit RISC processor that integrates a floating-point unit (FPU), single-cycle DSP multiply-accumulate instructions, and a memory protection unit (MPU), positioning it in the hierarchy: Cortex-M4 MCU -> 32-bit microcontroller -> embedded processor -> semiconductor. Microcontrollers of this class combine CPU, memory, and peripherals on a single die, making them the default choice for compact, energy-conscious embedded systems. Key differentiating features include industry-leading low-power modes: 100 nA in Shutdown mode, 3.4 uA in Stop 2 with RTC running, and a Low-power run mode down to 1.71V supply. The device integrates a 12-bit ADC with hardware oversampling (up to 5.33 Msps), a 12-bit DAC, two op-amps, comparators, and a true random number generator (TRNG), providing a complete analog signal chain on chip. Technically, the STM32L432KCU6 uses STMicroelectronics' ultra-low-power process technology with the ART Accelerator enabling zero-wait-state execution from Flash, sustaining 100 DMIPS and 273 CoreMark at 80 MHz. Flexible clocking includes a multi-speed internal oscillator (MSI) from 100 kHz to 48 MHz, plus 4 MHz HSI, 32 kHz LSE and an external oscillator option. Communication interfaces include USB 2.0 full-speed device, three USARTs, one UART, two SPI, and two I2C. Typical applications include battery-powered IoT sensor nodes, wearable health devices, and portable medical instrumentation, where the combination of 3.4 uA Stop 2 current and integrated analog peripherals directly extends battery life and reduces BOM count. Design consideration: exploit the MSI oscillator calibrated against the LSE to eliminate the external crystal in UART or USB-light designs, saving board area and cost; place 100 nF decoupling capacitors at each VDD/VDDA pin per ST layout guidance. This page synthesizes distributor pricing, pin-compatible alternatives, design notes, and FAQ content not found in the manufacturer datasheet, verified as of 2026-09-06.

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STM32L433RCT6 - Ultra-Low-Power ARM Cortex-M4 MCU | STMicroelectronics
STM32L433RCT6

STM32L433RCT6 - Ultra-Low-Power ARM Cortex-M4 MCU | STMicroelectronics

The STM32L433RCT6 is an ultra-low-power 32-bit microcontroller from STMicroelectronics, based on the ARM Cortex-M4 core with FPU. It operates at a maximum frequency of 80 MHz and provides 256 KB of flash memory and 64 KB of SRAM. The device is housed in a 64-pin LQFP package (LQFP64) and is designed for a wide range of battery-powered and energy-efficient applications. What is an ARM Cortex-M4 microcontroller? It is a 32-bit processor core designed for embedded systems, offering a balance of performance, power efficiency, and rich peripheral integration. The Cortex-M4 includes a floating-point unit (FPU) and DSP instructions, making it suitable for signal processing and control applications. In the system hierarchy, a microcontroller (MCU) integrates a processor core, memory, and programmable peripherals on a single chip, enabling standalone operation in embedded designs. Key features of the STM32L433RCT6 include an ultra-low-power mode with current consumption as low as 100 nA in standby mode, a 12-bit ADC with hardware oversampling, a 12-bit DAC, multiple communication interfaces (USART, SPI, I2C, USB), and a real-time clock (RTC). The device also integrates a flexible power management unit with multiple low-power modes, including Sleep, Low-power Run, and Stop modes, allowing designers to optimize energy consumption for their specific application. Technically, the STM32L433RCT6 is built on ST's advanced 40 nm process technology, which contributes to its low power consumption. The Cortex-M4 core with FPU accelerates mathematical computations, while the ART Accelerator enables zero-wait-state execution from flash memory, improving overall system performance. The device supports a wide operating voltage range from 1.71 V to 3.6 V, making it compatible with standard battery chemistries. Typical applications include smart meters, wearable devices, medical monitoring equipment, industrial sensors, and IoT nodes. Its ultra-low-power features make it ideal for battery-powered devices that require long operational lifetimes, such as wireless sensor networks and portable health monitors. When designing with this MCU, careful attention should be paid to power supply decoupling and PCB layout to minimize noise and ensure reliable operation. The device's multiple low-power modes require proper configuration of wake-up sources and clock sources to achieve optimal energy savings.

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STM32L443RCI6 - 80MHz Cortex-M4 MCU, 256KB, 64-UFBGA
STM32L443RCI6

STM32L443RCI6 - 80MHz Cortex-M4 MCU, 256KB, 64-UFBGA

The STMicroelectronics STM32L443RCI6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with floating-point unit, 80 MHz maximum clock, 256 KB Flash memory, 64 KB RAM, and a 64-UFBGA package measuring 5 x 5 mm. Verified distributor listings also identify USB, LCD, AES-256, and DFSDM support, making this MCU suitable for compact control, communications, security, and low-power embedded systems. A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals on one integrated circuit. The STM32L4 family belongs to the microcontroller hierarchy and targets applications where energy efficiency, real-time control, and peripheral integration are important. In this device, the Cortex-M4 core provides 32-bit execution with hardware floating-point capability, while the STM32L4 platform combines conventional embedded control with USB, display, and data-conversion functions. The verified feature set includes an 80 MHz operating frequency, 256 KB Flash organized as 256K x 8, and 64 KB RAM. The distributor descriptions also list LCD support, USB, AES-256 encryption, and DFSDM. These peripherals can reduce external component count by supporting human-machine interfaces, USB-connected equipment, hardware-assisted secure data handling, and digital signal acquisition. The 64-UFBGA package supports compact, high-density PCB designs but requires careful escape-routing and assembly planning. Technically, the Cortex-M4F architecture provides a practical balance between processing capability and low-power operation. Floating-point hardware is useful for sensor conditioning, control calculations, and digital signal processing without relying entirely on software arithmetic. The exact operating voltage, current, peripheral pin map, memory interfaces, and temperature limits are not supplied in the retrieved snippets, so those specifications remain subject to verification in the manufacturer datasheet before design release. Typical applications include low-power sensor nodes, industrial condition-monitoring equipment, USB-connected embedded controls, compact human-machine interfaces, security-aware portable products, and DFSDM-based audio or acquisition systems. Selection should prioritize the 64-UFBGA footprint, 256 KB Flash requirement, 64 KB RAM requirement, Cortex-M4 instruction compatibility, and required peripheral mix. Firmware, bootloader, pin multiplexing, clock configuration, and peripheral errata must also be reviewed. For a new PCB, route all 64 package balls according to the official pinout and land pattern rather than relying solely on the short distributor descriptions. Confirm USB transceiver requirements, decoupling, clock stability, exposed-ball assembly, and peripheral sharing before schematic release. This page synthesizes verified distributor data, package and feature information, replacement constraints, and engineering-oriented design guidance for STM32L443RCI6.

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STM32L443RCT6 - 80MHz Cortex-M4 MCU 256KB Flash | STMicroelectronics
STM32L443RCT6

STM32L443RCT6 - 80MHz Cortex-M4 MCU 256KB Flash | STMicroelectronics

The STMicroelectronics STM32L443RCT6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with FPU, 256KB Flash, 64KB SRAM, and integrated AES-256 hardware crypto, packaged in a 64-pin LQFP. It operates at up to 80 MHz delivering 100 DMIPS while maintaining the STM32L4 family's signature ultra-low-power performance. An Arm Cortex-M4 microcontroller is a 32-bit RISC processor core with DSP extensions and an optional single-precision floating-point unit, designed for deterministic real-time embedded control with low interrupt latency. Microcontrollers integrate the CPU core, Flash program memory, SRAM, and a rich set of peripherals into a single IC, forming the smallest complete compute subsystem for IoT and industrial designs. The STM32L4 series in particular extends this architecture with ST's ultra-low-power platform, embedding multiple voltage domains and dedicated low-power peripherals so the part can run from a coin cell for years. Key features of the STM32L443RCT6 include the Cortex-M4 core with FPU running at 80 MHz, 256 KB of Flash memory, 64 KB of SRAM, USB Full-Speed with Type-C Power Delivery support, an integrated LCD driver (4x44 or 8x40 segments), a 12-bit ADC (5 Msps), two 12-bit DACs, two operational amplifiers, and the AES-256 hardware cryptographic accelerator. It also includes the standard STM32 peripheral set: CAN 2.0B, I2C, SPI, USART, LPUART, timers, and an RTC with calendar. The architecture pairs an ART Accelerator with a multi-channel DMA, a 4 KB SRAM-based instruction cache, and ST's ultra-low-power voltage scaling core. This combination allows the part to wake from STANDBY in roughly 1.4 ms and remain in sleep modes drawing microamp-level currents while preserving register/RTC state, which is critical for battery-powered sensor nodes. Typical applications include ultra-low-power wireless sensor nodes, portable medical and wearable devices, smart meters, industrial HMI panels with LCD, USB-C powered accessories with Power Delivery negotiation, and secured IoT edge nodes leveraging the on-chip AES engine. Designers also deploy the device in audio front-ends, asset trackers, and battery-backed instrumentation. When designing with this MCU, plan the power tree carefully using ST's CubeMX tool to assign each rail (VDD, VDDA, VDD_USB, VBAT) to its required decoupling network. Pay particular attention to unused-pin handling: every GPIO must be set to a defined state to avoid parasitic current paths that can erode the low-power budget. This page synthesizes distributor pricing, same-family and cross-brand drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, giving embedded engineers an actionable reference for BOM selection.

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STM32L451CEU6 - 80MHz Cortex-M4 MCU 512KB Flash | STMicroelectronics
STM32L451CEU6

STM32L451CEU6 - 80MHz Cortex-M4 MCU 512KB Flash | STMicroelectronics

The STMicroelectronics STM32L451CEU6 is an ultra-low-power 32-bit ARM Cortex-M4 microcontroller with FPU operating at up to 80 MHz, packaged in a 48-pin UFQFPN (7x7 mm). It integrates 512 KB of Flash memory and 160 KB of SRAM, providing substantial headroom for embedded applications that combine an RTOS with rich peripheral stacks. An ultra-low-power microcontroller (MCU) is a class of 32-bit microcontroller optimized for battery-powered and energy-harvesting systems where average current draw over sleep-active duty cycles is the dominant design constraint. Within the broader taxonomy, the STM32L4 sits between general-purpose Cortex-M4 MCUs and the lower-power Cortex-M0+ families, occupying the ultra-low-power branch alongside the Cortex-M33 STM32L5 and Cortex-M0+ STM32L0. Its FPU and DSP extensions place it above M0+ parts in compute density, while its multi-domain power architecture (separate Core, peripheral, and memory voltage domains) places it above classical Cortex-M4 in energy efficiency. Key differentiating specifications include the 80 MHz Cortex-M4 core with single-precision FPU and DSP instructions, 1.71 V to 3.6 V operating supply range, five low-power modes (Sleep, Low-Power Sleep, Stop 0/1/2, Standby, Shutdown) with Shutdown current under 30 nA typical, and an integrated 12-bit ADC with hardware oversampling. The device also provides two DAC channels, three I2C, three SPI, one CAN 2.0B, one USB 2.0 Full-Speed device/host, and an integrated DFSDM digital filter for sigma-delta modulation. Architecturally, the STM32L451CEU6 uses ST's 90 nm ultra-low-leakage process with an adaptive voltage scaling loop that scales the core domain between 1.0 V and 1.2 V based on operating frequency. This allows RUN-mode current to track load and yields approximately 100 uA/MHz active efficiency. The 160 KB SRAM is split into multiple independent banks to allow retention-only sleep configurations that keep selected peripherals alive while the core domain is powered down. Typical applications include wearable health monitors, battery-powered sensor hubs, industrial 4-20 mA loop-powered transmitters, smart metering, BLE/Zigbee host controllers, and low-end audio processing using the on-board DFSDM. The 48-pin UFQFPN package is the right density point for designs needing CAN or USB plus a 12-bit analog front-end without paying for the larger 64-pin variants. When designing with this device, prioritize decoupling close to each VDD pin pair (one 100 nF X7R per domain plus one 4.7 uF bulk) and respect the UFQFPN exposed-pad solder process to keep junction temperature rise within datasheet limits. The Cortex-M4 FPU is single-precision only - use double-precision math in firmware will trap. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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