STM32L422KBT6 - 80MHz Cortex-M4 128KB MCU | STMicroelectronics
Teilenummer: STM32L422KBT6 ✓ AktivSTM32L422KBT6 Übersicht
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.
Drop-in-Alternativen für STM32L422KBT6 – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
STM32L422CBT6
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
STM32L422KAT6
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
STM32L432CBT6
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
STM32L442CBT6
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
STM32L452CBT6
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
STM32L422KBT6 Grenzwerte & elektrische Eigenschaften
| Product Type | Ultra-low-power 32-bit microcontroller |
| Processor Core | Arm Cortex-M4 with FPU |
| Architecture | 32-bit RISC |
| Maximum CPU Frequency | 80 MHz |
| Flash Memory | 128 KB |
| Flash Organization | 128K x 8 |
| SRAM | 40 KB |
| ADC Resolution | 12 bit |
| USB Interface | USB |
| Gehäuse | 32-LQFP, 7 mm x 7 mm |
| Pin-Anzahl | 32 pins |
| Montageart | Surface mount |
| Betriebstemperaturbereich | -40 °C to +85 °C |
STM32L422KBT6 Pin-Konfiguration
| Pin 1 | VBAT — Backup supply input |
| Pin 2 | PC14 — General-purpose or low-speed output port pin |
| Pin 3 | PC15 — General-purpose or low-speed output port pin |
| Pin 4 | NRST — Active-low reset input |
| Pin 5 | VDDA/VREF+ — Analog supply and positive reference input |
| Pin 6 | PA0 — General-purpose or alternate-function port pin |
| Pin 7 | PA1 — General-purpose or alternate-function port pin |
| Pin 8 | PA2 — General-purpose or alternate-function port pin |
| Pin 9 | PA3 — General-purpose or alternate-function port pin |
| Pin 10 | PA4 — General-purpose or alternate-function port pin |
| Pin 11 | PA5 — General-purpose or alternate-function port pin |
| Pin 12 | PA6 — General-purpose or alternate-function port pin |
| Pin 13 | PA7 — General-purpose or alternate-function port pin |
| Pin 14 | PB0 — General-purpose or alternate-function port pin |
| Pin 15 | PB1 — General-purpose or alternate-function port pin |
| Pin 16 | VSS/VREF- — Ground and negative reference connection |
| Pin 17 | VDD — Digital supply input |
| Pin 18 | PA8 — General-purpose or alternate-function port pin |
| Pin 19 | PA9 — General-purpose or alternate-function port pin |
| Pin 20 | PA10 — General-purpose or alternate-function port pin |
| Pin 21 | PA11 — General-purpose or alternate-function port pin |
| Pin 22 | PA12 — General-purpose or alternate-function port pin |
| Pin 23 | PA13 — Debug and general-purpose or alternate-function port pin |
| Pin 24 | VSS — Ground connection |
| Pin 25 | VDD — Digital supply input |
| Pin 26 | PA14 — Debug and general-purpose or alternate-function port pin |
| Pin 27 | PA15 — Debug and general-purpose or alternate-function port pin |
| Pin 28 | PB3 — Debug and general-purpose or alternate-function port pin |
| Pin 29 | PB4 — Debug and general-purpose or alternate-function port pin |
| Pin 30 | PB5 — General-purpose or alternate-function port pin |
| Pin 31 | PB6 — General-purpose or alternate-function port pin |
| Pin 32 | PB7 — General-purpose or alternate-function port pin |
Typische Anwendungen
STM32L422KBT6 ist geeignet für 6 Anwendungs: USB Industrial Sensor Controller, Portable Medical Data Logger, USB-to-Serial Configuration Adapter, Battery-Powered Condition Monitoring Node, Laboratory Instrumentation Control, Networked Building Control Module.
USB Industrial Sensor Controller
The STM32L422KBT6 fits a USB-connected industrial sensor controller because its 80 MHz Arm Cortex-M4 core can execute sampling logic, filtering, and communication routines while the 40 KB SRAM accommodates working buffers. The integrated USB capability can provide a direct device interface for configuration or data transfer, and the 12-bit ADC supports analog measurement channels. Its -40 °C to +85 °C range suits many factory environments. The engineering trade-off is that USB routing, clocking, decoupling, and ESD protection must be implemented carefully to preserve signal integrity and production reliability.
Empfohlen
Portable Medical Data Logger
The STM32L422KBT6 is suitable for a portable medical data logger that must collect sensor data, maintain timestamps, and transfer records through USB. Its 80 MHz Cortex-M4 core with FPU provides processing headroom for filtering and fixed-point or floating-point calculations, while 128 KB of Flash and 40 KB of SRAM support application firmware and data buffering. The compact 32-LQFP package assists miniaturization. For medical use, engineers must still validate electrical safety, EMC, calibration, and applicable regulatory requirements; the MCU's temperature rating alone does not establish medical certification.
Empfohlen
USB-to-Serial Configuration Adapter
The STM32L422KBT6 can serve as the controller in a USB-to-serial configuration accessory, combining USB connectivity with 80 MHz processing and 128 KB of internal Flash. A 40 KB SRAM allocation allows protocol buffers and command processing without requiring external memory in many configurations. The 32-LQFP package provides accessible assembly and inspection compared with finer-pitch alternatives. Firmware must implement the selected USB class, descriptors, clock initialization, and serial transceiver interface, while USB impedance and ESD considerations remain central to a reliable cable-connected product.
Empfohlen
Battery-Powered Condition Monitoring Node
The STM32L422KBT6 is appropriate for a battery-powered condition-monitoring node because it belongs to STMicroelectronics' ultra-low-power STM32L4 family and combines low-power design priorities with an 80 MHz Cortex-M4 core. The 128 KB Flash and 40 KB SRAM can hold monitoring algorithms, event logs, and communication buffering, while USB provides a convenient local service connection. Exact sleep-mode current and wake-up timing are not present in the verified data and must be measured or obtained from the datasheet. Power-budget calculations should include sensor standby current, USB attachment, and regulator losses.
Empfohlen
Laboratory Instrumentation Control
The STM32L422KBT6 can control a compact laboratory instrument that combines analog measurement, local logic, and USB connectivity. Its 80 MHz Cortex-M4 core with FPU handles signal conditioning algorithms and control sequencing, while the 12-bit ADC supports front-end measurement tasks. With 128 KB of Flash and 40 KB of SRAM, moderate multi-function firmware is practical without demanding external memory. Design verification should cover ADC accuracy, analog-noise behavior, reference stability, calibration storage, and USB enumeration. A higher-resolution converter may be preferable when the measurement chain requires more than the MCU ADC can provide.
Empfohlen
Networked Building Control Module
The STM32L422KBT6 is well matched to a compact building-control module requiring local logic, analog sensing, and USB commissioning. Its Cortex-M4 processing supports protocol handling and control tasks, and the 40 KB SRAM provides room for message buffers. The 12-bit ADC can monitor sensors through suitable conditioning circuits, while USB offers a practical configuration and diagnostic connection. For an installed commercial product, add appropriate communication protection, transient immunity, and environmental validation. The -40 °C to +85 °C specification supports many indoor and sheltered industrial locations but not uncontrolled extreme environments.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für STM32L422KBT6 – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | STM32L422CBT6 | STM32L422KAT6 | STM32L432CBT6 | STM32L442CBT6 | STM32L452CBT6 |
|---|---|---|---|---|---|---|
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) |
Wichtigste Unterscheidungsmerkmale
- Integrated USB in a low-power Cortex-M4 platform (vs. STM32F072VBT6TR)
- Confirmed 40 KB SRAM allocation (vs. STM32L432CBT6)
- Accessible 32-LQFP package with USB support (vs. STM32L452CBT6)
Designhinweise
Separate analog and digital supply routing where the datasheet permits it, and place the required decoupling capacitors adjacent to the corresponding VDD and VDDA pins. The verified web data does not specify capacitor values, voltage limits, or regulator topology, so those values must be taken from the STM32L422xx datasheet rather than estimated. Keep USB-sourced and switching-converter noise away from VDDA, and verify the power budget in every low-power mode because USB attachment can prevent the complete shutdown of attached circuitry.
Treat the USB D+ and D- connection as a controlled-impedance interface. Route the pair over a continuous reference plane, minimize stubs and test-point discontinuities, and place any required USB series termination close to the transmitter. Keep the 32-LQFP footprint free from unintended copper or conductive contamination around fine leads. Confirm NRST accessibility, debug programming access, oscillator placement, and all analog inputs against the manufacturer pin table before releasing the PCB.
Do not assume that a different STM32L4 order code is interchangeable merely because it uses an Arm Cortex-M4 core and an LQFP package. Compare the ordering table, exact flash and SRAM capacity, temperature grade, USB support, ADC channels, pin alternate functions, and electrical limits. The listed alternatives are same-brand family candidates sourced from LLM knowledge rather than explicit manufacturer cross-references, so each substitution requires datasheet review and firmware regression testing before production use.
Compliance-Informationen
The supplied verified web results do not explicitly state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields therefore remain unknown rather than being inferred from the manufacturer domain or package type.