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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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STM32L412K8U6 - 80MHz Cortex-M4 MCU, 64KB | STMicroelectronics
STM32L412K8U6

STM32L412K8U6 - 80MHz Cortex-M4 MCU, 64KB | STMicroelectronics

STMicroelectronics STM32L412K8U6 is an ultra-low-power 32-bit microcontroller built around an Arm Cortex-M4 processor with floating-point unit, operating at up to 80 MHz, with 64 KB of Flash memory in a 32-pin UFQFPN 5 x 5 mm package. It combines USB connectivity and low-power design in a compact embedded-control package. An ultra-low-power microcontroller is a semiconductor that balances processing capability with reduced energy consumption during active operation and low-power modes. The STM32L4 product hierarchy combines an Arm Cortex-M4 core, embedded Flash, SRAM, communication peripherals, and power-management functions. This makes the STM32L412K8U6 suitable for compact systems requiring flexible processing, serial connectivity, and efficient standby behavior without the complexity of a larger application processor. The principal specifications are an 80 MHz maximum clock frequency, 64 KB of Flash memory, and a 32-pin UFQFPN package measuring 5 x 5 mm. The Arm Cortex-M4 core includes an FPU for efficient single-precision floating-point operations, while USB support expands the available peripheral options. The 64 KB Flash configuration provides a practical balance between firmware capacity and package density for embedded products, control systems, and connected accessories. Compared with larger STM32 members, the K8U6 option offers a compact 32-pin footprint while retaining the performance-oriented Cortex-M4 architecture and 80 MHz operating frequency. The product-family naming structure also provides related density options that can be evaluated when more Flash memory is required, although changing density can affect pin availability, firmware organization, and board-level requirements. Software compatibility must therefore be checked against the exact device configuration. Typical uses include USB-connected industrial controls, compact sensor interfaces, low-power data-acquisition modules, medical and laboratory instruments, and small automation nodes. In these applications, the microcontroller can handle peripheral control, communications, and real-time processing while keeping the board area constrained by the 5 x 5 mm package. PCB implementation should preserve the exposed-pad thermal and electrical requirements of the UFQFPN package. Follow the manufacturer land pattern, provide the specified decoupling network, and review pin multiplexing and peripheral assignments for the selected board revision before releasing firmware. This product page combines the verified STM32L412K8U6 specifications, same-package family options, comparison parameters, and practical implementation guidance to support component selection, schematic review, sourcing, and PCB planning.

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STM32L412R8T6 - 80MHz Cortex-M4 MCU | STMicroelectronics
STM32L412R8T6

STM32L412R8T6 - 80MHz Cortex-M4 MCU | STMicroelectronics

The STMicroelectronics STM32L412R8T6 is an ultra-low-power 32-bit microcontroller based on the Arm Cortex-M4 RISC core, operating at up to 80 MHz. It provides 64 KB of flash memory and is available in a 64-LQFP package measuring 10 x 10 mm. The combination of Cortex-M4 processing, compact package size, and low-power design makes the device suitable for embedded control, sensor monitoring, portable equipment, and USB-connected systems. A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals into one package. The STM32L4 family belongs to the hierarchy of embedded processors, Arm Cortex-M microcontrollers, low-power MCUs, and semiconductor devices. Its Cortex-M4 architecture supports efficient control-oriented software, while the STM32L412R8T6 combines that processing capability with a 64-pin surface-mount package. The principal verified specifications are an 80 MHz maximum operating frequency, 32-bit processing width, and 64 KB of flash memory. The 64-LQFP package provides 64 leads and a 10 x 10 mm body size. Manufacturer search data also identifies the device as an ultra-low-power MCU with USB capability. Detailed RAM capacity, voltage range, ADC characteristics, timer configuration, and current-consumption figures require confirmation in the manufacturer datasheet. The STM32L412R8T6 is positioned for compact embedded systems that need more processing capability than a basic 8-bit controller without adopting a larger high-performance MCU. Its Arm Cortex-M4 core provides a common instruction set and development ecosystem, while the STM32L412xx family is designed around low-power embedded applications. Exact peripheral availability and pin multiplexing must be checked against the order-code-specific pinout. Typical uses include low-power sensor nodes, USB peripheral equipment, industrial monitoring modules, compact consumer accessories, and battery-operated embedded controllers. In these systems, the 80 MHz core can support responsive control logic, while the 64 KB flash store provides room for firmware and configuration data. The 64-LQFP package remains compatible with conventional PCB assembly and inspection processes. Designers should verify the complete order code, voltage ratings, exposed-pin requirements, decoupling, clock configuration, and peripheral pin assignments in the STM32L412xx manufacturer datasheet before layout release. Particular care is required when a design depends on USB, crystal timing, boot behavior, or low-current measurements because those values are not present in the supplied distributor snippets. This page consolidates the verified manufacturer and distributor information, distinguishes exact published data from parameters still requiring datasheet confirmation, and provides application guidance and same-family drop-in alternatives for engineering review. Every proposed alternative still requires firmware, peripheral, timing, and qualification verification before production substitution.

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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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STM32L431CCT6 - 80MHz Cortex-M4 256KB | STMicroelectronics
STM32L431CCT6

STM32L431CCT6 - 80MHz Cortex-M4 256KB | STMicroelectronics

The STMicroelectronics STM32L431CCT6 is an ultra-low-power 32-bit microcontroller built around the Arm Cortex-M4 core, operating at up to 80 MHz with 256 KB of Flash memory in a 48-LQFP package measuring 7 mm by 7 mm. It combines high processing performance with a compact package and low-power-oriented design for embedded control, sensing, communications, and industrial applications. A microcontroller is a programmable system-on-chip that integrates a processor core, Flash program memory, RAM, peripherals, and interface controllers on one semiconductor device. The STM32L4 series occupies the low-power microcontroller segment of the broader embedded-processing hierarchy. STM32L431 devices use the Arm Cortex-M4 RISC core to balance computational performance, peripheral integration, and energy-efficient operation in battery-operated and always-on equipment. The STM32L431CCT6 provides a 32-bit Arm Cortex-M4 processor, an operating frequency of up to 80 MHz, and 256 KB of Flash organized as 256K by 8 bits. Its 48-LQFP package supports compact surface-mount assembly while exposing a broad mix of digital, analog, timing, and communications resources. The part is positioned for designs that require more processing capability than an 8-bit or Cortex-M0+ controller without moving to a larger performance and power class. STMicroelectronics describes the STM32L431xx family as an ultra-low-power microcontroller platform. This architecture is appropriate for applications that spend substantial time in low-energy states and need fast execution when active. The Cortex-M4 instruction set also supports efficient digital signal-processing tasks, while the integrated Flash and peripheral resources reduce the number of external components required in compact embedded systems. Typical uses include connected industrial sensors, low-power data loggers, motor and actuator controllers, compact communication equipment, and portable measurement products. The 80 MHz operating rate supports responsive control loops and communication handling, while the 256 KB Flash capacity accommodates a bootloader, application firmware, configuration data, and update routines. The 7 mm by 7 mm LQFP footprint is also suitable for boards where a very small QFN package would be difficult to assemble. When designing around the STM32L431CCT6, confirm that the PCB land pattern, pin assignment, clock strategy, power requirements, and peripheral allocation match the selected board revision. Place decoupling capacitors close to the supply pins and follow the pin-description table in the manufacturer datasheet when assigning nets. The 48-LQFP package also requires adequate solderable exposed perimeter for assembly and inspection. This product page combines the manufacturer product description, package and memory characteristics, compatible family alternatives, and practical implementation guidance. It is intended to help engineers evaluate the STM32L431CCT6 for low-power embedded designs, verify footprint compatibility, and identify the peripheral details that should be confirmed before schematic release or PCB layout.

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STM32L431RCI6 - 80MHz Cortex-M4 MCU | STMicroelectronics
STM32L431RCI6

STM32L431RCI6 - 80MHz Cortex-M4 MCU | STMicroelectronics

STMicroelectronics STM32L431RCI6 is an ultra-low-power 32-bit microcontroller based on the Arm Cortex-M4 core, operating up to 80 MHz with 256 KB of Flash memory, 64 KB of SRAM, and a 64-UFBGA 5 x 5 mm package. It combines a single-precision floating-point unit with DSP instructions and an RTC featuring a hardware calendar, alarms, and calibration. An ultra-low-power microcontroller is designed to balance responsive processing with low energy consumption during both active operation and sleep. The STM32L4 family belongs to the hierarchy microcontroller, embedded processor, 32-bit RISC processor, and power-conscious embedded controller. This makes the STM32L431RCI6 suitable for connected industrial equipment, compact sensors, portable instruments, and battery-operated products that periodically sleep between tasks. Principal features include an 80 MHz Arm Cortex-M4F processor, 256 KB of Flash, 64 KB of SRAM, a single-precision FPU, full DSP instruction support, and an RTC with hardware calendar, alarms, and calibration. The compact 64-UFBGA package has a 5 x 5 mm body size, allowing a high component density on space-constrained boards while retaining a large set of mixed-signal and communication interfaces. The Cortex-M4F architecture supports efficient single-precision floating-point calculations and DSP operations commonly needed in sensor conditioning, digital filtering, and control algorithms. Its Harvard-style instruction flow and integrated debug support simplify firmware development, while the STM32L4 family's low-power operating modes can help reduce average system energy use in duty-cycled designs. Typical applications include connected industrial sensors, compact environmental monitors, low-power data loggers, portable measurement equipment, and embedded control modules. The device is also suitable for designs that process locally acquired sensor data, maintain time and calendar information, and communicate through serial peripherals such as UART, SPI, or I2C. PCB design should follow the manufacturer's land pattern and provide appropriate high-frequency decoupling near the supply pins. Because the 64-UFBGA footprint is compact, assembly inspection and solder-joint reliability require careful process control. Firmware should also validate low-power transitions, RTC behavior, and peripheral clock configuration during bring-up. This product page combines the manufacturer's core device characteristics, procurement structure, and practical design considerations into an engineering-focused reference. It also highlights the limits of drop-in sourcing: no distinct pin-compatible alternatives are presented unless their package, pinout, memory configuration, and electrical requirements can be verified rather than inferred from a family name.

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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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STM32L431VCI6 - 80MHz Cortex-M4 MCU | STMicroelectronics
STM32L431VCI6

STM32L431VCI6 - 80MHz Cortex-M4 MCU | STMicroelectronics

STMicroelectronics STM32L431VCI6 is an ultra-low-power 32-bit microcontroller based on the Arm Cortex-M4 RISC core, operating at up to 80 MHz and containing 256 KB of Flash memory. The device is offered in a 100-pin UFBGA package measuring 7 x 7 mm. Its Cortex-M4F core includes a single-precision floating-point unit and DSP instructions for efficient arithmetic and signal-processing workloads. An ultra-low-power microcontroller is an embedded processing component designed to balance computational capability with energy efficiency. Within the device hierarchy, the STM32L431VCI6 is a 32-bit microcontroller built around the Arm Cortex-M4 processor core. It belongs to STMicroelectronics' STM32L4 family and supports applications in which compact size, low-power operation, mixed-signal control, communications, and real-time processing are important. Core features include an operating frequency of up to 80 MHz, 256 KB of Flash, single-precision floating-point hardware, and DSP instruction support. The 100-UFBGA package provides a compact surface-mount solution for space-constrained embedded products. Operating voltage selections shown for this exact device include 1.8 V, 2.5 V, and 3.3 V, allowing integration with common low-voltage embedded systems. The manufacturer identifies the device as an ultra-low-power Arm Cortex-M4 MCU. The Cortex-M4 architecture combines a 32-bit RISC instruction set with an efficient exception-based operating model and hardware features suited to control workloads. The floating-point unit accelerates single-precision operations without requiring software emulation, while DSP instructions support common filtering and signal-processing calculations. These capabilities make the MCU suitable for connected sensors, industrial controls, medical instruments, and low-power embedded products requiring more performance than a basic Cortex-M0-class device. Typical applications include low-power sensor nodes, industrial monitoring equipment, compact data loggers, connected measurement instruments, and embedded control systems. The 256 KB Flash capacity provides room for application firmware and configuration data, while the 7 x 7 mm UFBGA package helps reduce board footprint. Confirm peripheral assignments, clock configuration, and power-supply requirements against the manufacturer datasheet before finalizing a PCB layout. For PCB implementation, use the manufacturer land pattern for the 100-UFBGA package and preserve the documented pin, power, ground, decoupling, and programming connections. Because this package has a fine ball pitch and 100 terminals, inspect the assembled board for solder bridges and verify continuity on every power rail. Match external crystal, reset, and boot circuitry to the device reference configuration rather than relying on another STM32 footprint. This page combines the manufacturer product information with practical implementation guidance, focused comparisons, and verified source links. It also distinguishes the exact STM32L431VCI6 configuration from related STM32L431 family variants so engineers can assess memory capacity, package, and qualification requirements before selecting a replacement.

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STM32L431VCT6 - 80MHz Cortex-M4F MCU | STMicroelectronics
STM32L431VCT6

STM32L431VCT6 - 80MHz Cortex-M4F MCU | STMicroelectronics

STMicroelectronics STM32L431VCT6 is an ultra-low-power 32-bit microcontroller built around an Arm Cortex-M4 processor with single-precision floating-point unit, operating up to 80 MHz. The device provides 256 KB of Flash memory and is supplied in a 100-pin LQFP package measuring 14 mm by 14 mm. An ultra-low-power microcontroller is an embedded processing device designed to balance computational performance with low energy consumption. The STM32L431VC family belongs to the STM32L4 series and combines an Arm Cortex-M4 RISC core, embedded Flash, SRAM, analog resources, timers, and communication peripherals within one integrated circuit. This hierarchy places the MCU above the Cortex-M4 processor core and below the broader embedded semiconductor and industrial-control device categories. The STM32L431VCT6 operates as a 32-bit Arm Cortex-M4 MCU with a maximum frequency of 80 MHz. Its Cortex-M4 core includes a single-precision FPU capable of executing single-precision floating-point instructions, while the processor also supports a full set of DSP instructions. The 256 KB Flash configuration provides dedicated program storage, while the 64 KB SRAM value reported for the device supports working memory for control loops, communications, and peripheral data handling. The 100-pin LQFP package exposes substantially more I/O than smaller 32-pin or 64-pin microcontroller packages, allowing integration of multiple analog inputs, timers, serial interfaces, and external-memory connections on one device. Its 14 mm by 14 mm leaded package is also suitable for automated assembly and inspection processes. The operating temperature grade encoded by the T6 suffix and the complete ordering-code details should be confirmed against the manufacturer ordering information before production release. Typical uses include industrial sensor nodes, compact industrial controllers, connected measurement equipment, building-automation controllers, battery-powered condition-monitoring systems, and low-power embedded gateways. The Cortex-M4F processing capability is particularly useful when the control application must process sampled analog values or implement digital signal-processing routines without using a higher-power application processor. PCB planning should begin with the manufacturer's 100-pin package drawing and land pattern. Place decoupling capacitors close to the supply and ground pins, preserve the recommended clock and debug connections, and route sensitive analog inputs away from fast-switching nodes. Firmware, peripheral configuration, pin multiplexing, and low-power behavior should be validated against the STM32L431xx datasheet rather than inferred solely from the order code. This product record combines the verified 80 MHz operating frequency, Cortex-M4F architecture, 256 KB Flash capacity, 64 KB SRAM, and 100-pin LQFP construction with practical design guidance. It also distinguishes verified characteristics from parameters that require direct confirmation in the manufacturer datasheet, helping engineers assess fit before layout, sourcing, and firmware development begin.

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STM32L432KCU3 - 80MHz Cortex-M4 MCU | STMicroelectronics
STM32L432KCU3

STM32L432KCU3 - 80MHz Cortex-M4 MCU | STMicroelectronics

The STMicroelectronics STM32L432KCU3 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with FPU, operating up to 80 MHz and delivering up to 100 DMIPS. It integrates 256 KB of Flash memory and 64 KB of SRAM, supports USB full-speed, analog, and audio functions, and is packaged in a 32-pin UFQFPN measuring 5 mm by 5 mm. An ultra-low-power microcontroller is a compact embedded processing device designed to balance real-time computation with constrained energy use. The STM32L4 family combines a Cortex-M4 processor, embedded memory, analog conversion, connectivity, and low-power peripherals within a single system-on-chip. Its position in the hierarchy is microcontroller, embedded processor, Arm Cortex-M microcontroller, and finally semiconductor, making it suitable for compact control systems that require more performance than a basic low-power MCU. Key features include an 80 MHz Cortex-M4 core, 256 KB of Flash, 64 KB of SRAM, a floating-point unit, USB full-speed support, and analog and audio capabilities. The processor can execute up to 100 DMIPS, making it suitable for responsive control loops, communications, data acquisition, and compact user-interface logic. Its 32-pin UFQFPN package also supports space-constrained board layouts requiring numerous mixed-signal and peripheral connections. The Arm Cortex-M4 architecture provides a 32-bit RISC instruction set with hardware floating-point support, reducing the software burden for common control and signal-processing calculations. USB full-speed connectivity permits direct peripheral interfacing, while the integrated analog, audio, and low-power features reduce the need for separate components in embedded designs. Designers should still verify the exact peripheral allocation, clock configuration, and operating limits for each board design against the manufacturer datasheet. Typical applications include USB-connected data loggers, compact industrial condition-monitoring nodes, low-power audio-control systems, sensor-hub controllers, and wearable or portable measurement equipment. In each case, the combination of 256 KB Flash, 64 KB SRAM, USB full-speed, and an 80 MHz processing core supports moderate firmware complexity while retaining a small 5 mm by 5 mm footprint. The primary design consideration is complete pin and peripheral validation before layout. Confirm USB routing requirements, decoupling, exposed-pad thermal management, oscillator connections, and all required alternate-function assignments in the manufacturer pin-description table. Preserve the exposed-pad land pattern and follow the package land-pattern guidance when creating the PCB footprint. This product page consolidates core specifications, same-family drop-in candidates, application guidance, package considerations, and design notes. It helps engineers compare memory, core frequency, interface capability, and footprint while completing an STM32L432KCU3 datasheet, pinout, replacement, and sourcing review.

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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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STM32L433CCT6 - 80MHz Cortex-M4 256KB Flash | STMicroelectronics
STM32L433CCT6

STM32L433CCT6 - 80MHz Cortex-M4 256KB Flash | STMicroelectronics

The STMicroelectronics STM32L433CCT6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with an FPU, operating at up to 80 MHz and delivering up to 100 DMIPS. It provides up to 256 KB of embedded Flash memory and 64 KB of SRAM, with USB full-speed, LCD, and external SMPS support. The device is packaged in a 48-LQFP package measuring 7 mm by 7 mm. A microcontroller is a programmable semiconductor that integrates a processor core, memory, and peripherals into one device. The STM32L433xx family belongs to the STM32L4 ultra-low-power line and combines Cortex-M4 real-time processing with energy-conscious operation for embedded control, sensor, communication, and human-interface applications. Its Arm Cortex-M4 architecture provides a 32-bit RISC instruction set, while the integrated floating-point unit supports efficient control and signal-processing calculations. The headline features of the STM32L433CCT6 are its 80 MHz maximum operating frequency, 100 DMIPS processing capability, 256 KB Flash memory, and 64 KB SRAM. USB full-speed connectivity enables USB peripherals and host or device communication, while LCD support simplifies connected displays. External SMPS support is useful in designs where the MCU controls a dedicated switched-capacitor or switching-mode power-supply stage. The STM32L433xx architecture is designed for low-power embedded systems while retaining a high-performance Cortex-M4 core and integrated floating-point hardware. The 256 KB Flash capacity is suitable for firmware, boot code, configuration data, and application logic, while 64 KB SRAM supports working memory, buffers, stacks, and peripheral data movement. The combination of USB, LCD, and external SMPS support reduces the number of separate components needed in compact embedded platforms. Typical applications include USB-connected sensor nodes, industrial control and monitoring equipment, compact human-interface panels, connected measurement instruments, and low-power embedded gateways. The LCD and USB features make the device useful in devices that need local display feedback and USB connectivity, while the Cortex-M4 FPU is appropriate for real-time control and floating-point signal processing. When designing around the STM32L433CCT6, check the device-specific pin assignments, power-supply requirements, clock configuration, decoupling recommendations, and exposed-pad connection in the manufacturer datasheet. The 7 mm by 7 mm LQFP footprint supports conventional PCB assembly, but signal integrity and thermal performance still depend on the surrounding layout and power-delivery network.

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STM32L433CCU3 - 80MHz Cortex-M4 MCU | STMicroelectronics
STM32L433CCU3

STM32L433CCU3 - 80MHz Cortex-M4 MCU | STMicroelectronics

The STMicroelectronics STM32L433CCU3 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with a single-precision FPU, operating up to 80 MHz and delivering up to 100 DMIPS. It provides 256 KB of embedded Flash, 64 KB of SRAM, USB full-speed connectivity, an LCD controller, and an external switched-mode power supply in a 48-pin UFQFPN package measuring 7 x 7 mm. A microcontroller is a programmable semiconductor that integrates a processor core, memory, peripherals, and interface logic into one compact device. The STM32L433 belongs to the STM32L4 family of 32-bit RISC microcontrollers, where its Cortex-M4 core combines efficient control processing with floating-point and DSP instruction support. This hierarchy places the device between general-purpose embedded processors and highly integrated application-specific controllers. Principal features include 256 KB of Flash for firmware and data, 64 KB of SRAM for working memory, an Arm Cortex-M4 FPU, 100 DMIPS processing performance, and a maximum clock frequency of 80 MHz. USB full-speed support enables USB connectivity, while the integrated LCD controller serves compact human-interface designs. The external SMPS capability can support efficient power management in low-power embedded systems. The STM32L433 architecture is suited to connected control systems where processing performance, memory capacity, and low-power operation must coexist within a small package. Its Cortex-M4 core executes single-precision floating-point and DSP instructions, while the STM32L4 family peripherals consolidate communication, timing, analog, and debug functions around the processor. The 48-pin UFQFPN package supports compact board layouts without using a large leaded package. Typical applications include USB-connected data acquisition, compact industrial control modules, low-power sensor gateways, human-interface panels with an LCD, secure or connected embedded controllers, and portable measurement equipment. The combination of 80 MHz processing and 256 KB Flash is especially useful for protocol handling, local data processing, and firmware-intensive control tasks. Designers should confirm the pin configuration, supported voltage combinations, clock setup, and peripheral assignment against the manufacturer datasheet before schematic capture. PCB planning must preserve access to the exposed pad, programming and debug interfaces, and all power pins. Firmware should also use the STM32CubeMX or STM32CubeIDE device configuration tools when creating clock trees and peripheral initialization sequences. This page combines the manufacturer specifications, package and memory details, practical application guidance, drop-in alternatives, and design considerations needed to evaluate the STM32L433CCU3 for a new embedded product. It also highlights where a different STM32L4 member may be preferable when memory size, qualification, or extended features differ.

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STM32L433CCU6 - 80MHz Cortex-M4 MCU, 256KB Flash | STMicroelectronics
STM32L433CCU6

STM32L433CCU6 - 80MHz Cortex-M4 MCU, 256KB Flash | STMicroelectronics

The STMicroelectronics STM32L433CCU6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with FPU, operating up to 80 MHz and delivering 100 DMIPS, with 256 KB of Flash memory, 64 KB of SRAM, USB full-speed, LCD support, and an external switched-mode power-supply controller in a 48-pin UFQFPN package measuring 7 x 7 mm. The STM32L433xx family combines performance-oriented embedded processing with energy-conscious operation for embedded, industrial, and connected products. An ultra-low-power microcontroller is an embedded processing component designed to retain useful computing capability while minimizing energy consumption during active, standby, sleep, and backup modes. The STM32L4 series belongs to the microcontroller hierarchy, combining an Arm Cortex-M processor core, embedded nonvolatile Flash, SRAM, communication peripherals, and low-power clock and power-management functions in one device. This integration allows a compact embedded system to replace separate processor, memory, and interface components while supporting battery-powered operation. Key features include a 1.71 V to 3.6 V supply range, 256 KB of Flash, 64 KB of SRAM, an Arm Cortex-M4 processor with single-precision floating-point capability, USB full-speed connectivity, and an LCD controller. The family also supports operating temperatures from -40 °C to 85 °C, 105 °C, or 125 °C, depending on the exact orderable variant. In backup mode, the RTC and 32 x 32-bit backup registers can be supplied from VBAT at 200 nA. The Cortex-M4 architecture provides a 32-bit instruction set with hardware floating-point instructions and up to 100 DMIPS of performance. This performance supports responsive control logic and moderate digital signal-processing workloads while retaining the power-management options expected from an STM32L4 device. Flexible memory and peripherals make the MCU applicable to industrial controllers, human-interface systems, compact data loggers, and USB-connected equipment. Typical applications include low-power industrial sensing equipment, connected measurement instruments, compact user-interface controllers, USB peripheral devices, and embedded systems that require an LCD controller or an external SMPS power rail. The 256 KB Flash capacity provides room for a bootloader, application firmware, configuration data, and update routines, while 64 KB of SRAM supports working buffers and real-time control logic. Designers should plan the PCB for a 48-pin UFQFPN footprint, provide the decoupling and exposed-pad connections specified by the manufacturer datasheet, and confirm the external SMPS configuration before committing to the power architecture. Program development and peripheral configuration should also be checked against the STM32CubeMX and STM32CubeIDE device support selected for this part. This page combines device specifications, application guidance, same-family replacement analysis, and practical design considerations to accelerate MCU selection and board development.

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STM32L433RCI3 - 80MHz Cortex-M4F 256KB Flash 64KB SRAM | STMicroelectronics
STM32L433RCI3

STM32L433RCI3 - 80MHz Cortex-M4F 256KB Flash 64KB SRAM | STMicroelectronics

The STMicroelectronics STM32L433RCI3 is an ultra-low-power Arm Cortex-M4 microcontroller with FPU running at up to 80 MHz, integrating 256 KB of Flash, 64 KB of SRAM, a USB Full-Speed device controller and an LCD controller in a 64-pin UFBGA (5x5 mm) package. It operates from 1.71 V to 3.6 V supply rails, covering 1.8 V, 2.5 V and 3.3 V systems, and is specified over the -40 C to +85 C industrial temperature range. An ultra-low-power microcontroller is a type of embedded processor optimized for battery-operated and energy-harvesting systems. The STM32L4 family belongs to the hierarchy microcontroller -> embedded processor -> semiconductor, and adds ST's ultra-low-power design on top of the standard Arm Cortex-M4 core, enabling microamp-class standby current alongside 100 DMIPS of compute throughput. Key features of the STM32L433RCI3 include 100 DMIPS performance at 80 MHz, 256 KB of Flash memory for firmware, and 64 KB of SRAM for working data and DMA buffers. The device includes a 12-bit ADC, comparators, a programmable timer array, real-time clock, and a flexible power-management architecture with an optional internal SMPS for analog rails. Multiple low-power modes (Stop, Standby, and Shutdown) support designs that must survive long idle periods on coin cells or energy-harvesting sources. Technically, the part combines an Arm Cortex-M4F core (single precision FPU) with a 1.71 V minimum operating voltage for direct 1.8 V battery operation, low-power flash and SRAM retention options, and a peripheral set optimized for sensor-hub and metering designs. The integrated USB FS device and LCD controller reduce the external component count on connected HMI products, while the analog peripherals support direct sensor interfacing without external signal conditioning. Typical applications include Bluetooth and Zigbee sensor-hub modules, connected industrial sensors, low-power data loggers, portable medical and wellness devices, smart meters, compact HMI panels with LCD, and USB-connected battery-powered instrumentation. Each of these designs benefits from the combination of 256 KB Flash, hardware FPU, and deep sleep current in the microamp range. The key design consideration for this part is supply rail planning: the analog and digital sections share a 1.71 V to 3.6 V range, so decoupling and layout must respect the recommended input and output capacitor networks, and any LCD or USB termination must be sized for the 1.8 V minimum rail. Use the pin description table in the STMicroelectronics datasheet when assigning PCB tracks and keep high-current USB and LCD paths away from the ADC inputs. This page combines manufacturer specifications with package-level guidance, drop-in same-family alternatives, and practical design notes covering power, layout and low-power design that are not covered by the raw datasheet parameter tables.

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STM32L433RCI6 - 80MHz Cortex-M4 256KB MCU | STMicroelectronics
STM32L433RCI6

STM32L433RCI6 - 80MHz Cortex-M4 256KB MCU | STMicroelectronics

The STMicroelectronics STM32L433RCI6 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with an integrated floating-point unit, operating up to 80 MHz with 256 KB of Flash memory and 64 KB of SRAM in a 64-pin UFBGA package measuring 5 mm by 5 mm. It supports a 1.71 V to 3.6 V power supply and combines a 100-DMIPS-class Cortex-M4 core with USB full-speed, LCD, and external switched-mode power-supply capabilities. An ultra-low-power microcontroller is a semiconductor designed to perform control, measurement, and communication tasks while minimizing energy consumption. The STM32L4 family belongs to the Arm Cortex-M4 microcontroller, embedded-processor, and power-management semiconductor hierarchy. Its low-power operating modes are useful in battery-powered equipment where the difference between active processing and standby current can determine how long a product operates between service intervals. Key features of the STM32L433RCI6 include its 80 MHz maximum core frequency, 256 KB of embedded Flash, 64 KB of SRAM, Arm Cortex-M4 instruction set, and hardware floating-point unit. The device also provides USB full-speed connectivity and LCD support. According to the manufacturer datasheet, its operating-temperature options extend from -40 °C to 85 °C, 105 °C, or 125 °C, depending on the selected device variant. A 200 nA VBAT mode supports the real-time clock and 32 by 32-bit backup registers. The STM32L4 architecture combines several low-power modes with peripheral activity management, allowing unused peripherals and clock domains to remain inactive. Its 1.71 V to 3.6 V operating range supports low-voltage battery systems and regulated industrial rails. The external SMPS option can support a more efficient multi-rail implementation when the board topology and firmware configuration permit it. The USB full-speed interface is particularly relevant to portable instruments, accessories, and data-logging equipment. Typical applications include low-power USB data loggers, compact sensor-hub controllers, industrial monitoring equipment, medical-device interface modules, connected accessories, and battery-powered test instruments. The combination of 80 MHz processing performance, 256 KB Flash, and 64 KB SRAM is suitable for moderate control workloads that require several communication interfaces or local data buffering without moving to a higher-density microcontroller. Designers should verify pin multiplexing, package-specific functions, decoupling, clock configuration, and boot requirements against the manufacturer datasheet and reference manual. Confirm the exact USB and LCD peripheral instance mappings before assigning board signals, and validate the power budget across run, stop, standby, and VBAT backup modes for the intended battery life. This product page combines manufacturer specifications, package details, application guidance, comparison parameters, and practical design notes to support faster component selection. It also identifies same-package replacement candidates and highlights the firmware, pin-mapping, and power-mode checks required before approving any substitute.

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STM32L433RCT3 - 80MHz Cortex-M4 MCU | STMicroelectronics
STM32L433RCT3

STM32L433RCT3 - 80MHz Cortex-M4 MCU | STMicroelectronics

STMicroelectronics STM32L433RCT3 is an ultra-low-power 32-bit Arm Cortex-M4 microcontroller with FPU, operating at up to 80 MHz. The device provides 256 KB of embedded Flash memory, 64 KB of SRAM, USB full-speed connectivity, LCD controller support, and an external switched-mode power supply capability. It is packaged in a 64-pin LQFP measuring 10 mm by 10 mm. An ultra-low-power microcontroller is an embedded controller designed to balance processing performance, active current, and sleep-state consumption. The STM32L4 product family combines an Arm Cortex-M4 core with energy-saving modes, analog peripherals, and connectivity interfaces. This makes the STM32L433RC family suitable for compact embedded products that need more processing capability than a basic low-cost microcontroller while retaining strict energy budgets. The STM32L433RCT3 supports operation at up to 80 MHz and includes 100 DMIPS-class processing performance according to the manufacturer datasheet. Its 256 KB Flash memory provides room for application code and firmware, while 64 KB of SRAM supports working data, protocol stacks, and peripheral buffers. Integrated USB full-speed, LCD, and external SMPS functions reduce the number of external components required in connected or display-oriented products. The STM32L433RC family uses the Arm Cortex-M4 processor with a floating-point unit. This architecture supports efficient digital signal processing and control calculations without requiring a separate DSP. Peripheral integration includes an LCD interface, USB full-speed interface, and external SMPS option, while the ultra-low-power design is intended for applications where standby and low-power operating modes are important. Typical uses include low-power sensor controllers, compact human-interface devices, USB-connected embedded equipment, industrial monitoring modules, and battery-operated products. The 256 KB Flash configuration is appropriate for moderate networking protocols, control firmware, user interfaces, and data acquisition functions. Developers should select external flash only when the application exceeds both the internal program-memory and SRAM budgets. PCB implementation requires careful attention to the 64-pin LQFP land pattern, power and ground distribution, decoupling, and exposed signal routing. Follow the manufacturer pin descriptions and recommended layout guidance when assigning tracks. Firmware should use the STM32CubeMX-supported device configuration and the clock, flash, and low-power settings documented for the STM32L433RC family. This product page consolidates the core memory, processor, package, interface, and lifecycle facts with application guidance, package considerations, and engineering selection criteria. It is designed to help engineers determine whether the STM32L433RCT3 provides the required compute density, memory, connectivity, and low-power characteristics before beginning PCB and firmware development.

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