STM32L422RBI6 - 80MHz Cortex-M4 128KB MCU | STMicroelectronics
Référence : STM32L422RBI6 ✓ ActifSTM32L422RBI6 Présentation
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.
Alternatives de remplacement direct pour STM32L422RBI6 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
STM32L422RBT6
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
STM32L422RBI6 Valeurs maximales et caractéristiques électriques
| Product Type | Ultra-low-power 32-bit microcontroller |
| Processor Core | Arm Cortex-M4 with FPU |
| Maximum Core Frequency | 80 MHz |
| Architecture | 32-bit RISC |
| Flash Memory | 128 KB |
| RAM | 40 KB |
| Supply Voltage Range | 1.71 V to 3.6 V |
| VBAT Mode Current | 300 nA |
| Shutdown Mode Current | 16 nA with 4 wakeup pins |
| Standby Mode Current | 32 nA with 4 wakeup pins |
| Standby Mode Current with RTC | 245 nA |
| RTC Backup Registers | 32 x 32-bit |
| Plage de température de fonctionnement | -40°C to 85°C / 125°C |
| Connectivity | USB |
| Boîtier | 64-UFBGA, 5x5 mm |
| Type de montage | Surface Mount |
Guide de configuration des broches du STM32L422RBI6 64-ufbga, 5x5 mm
Configuration des broches du STM32L422RBI6 (boîtier 64-ufbga, 5x5 mm). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour STM32L422RBI6.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
STM32L422RBI6 convient pour 6 applications: USB Connected Data Logger, Industrial Sensor Node, Battery-Powered Wearable Accessory, Building Control Endpoint, Portable Measurement Instrument, Compact Industrial Communication Module.
USB Connected Data Logger
The STM32L422RBI6 fits a compact USB data logger because it combines an 80 MHz Arm Cortex-M4 with FPU, 128 KB Flash, 40 KB RAM, and USB connectivity. Firmware can acquire sensor data, perform filtering, maintain records, and present the results through the integrated USB interface without requiring a separate USB controller. The 64-UFBGA 5x5 mm package also helps reduce board area. A design that spends most of its time waiting for a host connection can use the verified 32 nA standby condition or 16 nA shutdown condition, provided the data-acquisition circuitry is placed in a compatible low-power state. USB routing, connector protection, supply sequencing, and firmware support still require normal engineering review.
Recommandé
Industrial Sensor Node
The STM32L422RBI6 is suitable for an industrial sensor node where processing capability, compact size, and low standby consumption must coexist. Its Cortex-M4 core can run up to 80 MHz, providing headroom for acquisition, filtering, digital conversion, and communications, while 128 KB Flash and 40 KB RAM support embedded firmware and working buffers. The 1.71 V to 3.6 V supply range supports low-voltage power-tree designs. When the node operates at intervals, the verified 245 nA standby-with-RTC figure can be relevant for battery budgeting. The 64-UFBGA 5x5 mm package requires careful PCB design, and final suitability must include validation of the exact temperature grade and industrial qualification requirements.
Recommandé
Battery-Powered Wearable Accessory
The STM32L422RBI6 can support a battery-powered wearable accessory that must perform occasional processing while keeping standby consumption low. The MCU provides an 80 MHz Cortex-M4 with FPU, 128 KB Flash, and 40 KB RAM for response handling, activity classification, and compact control logic. Verified low-power figures include 300 nA in VBAT mode, 32 nA in standby mode, and 16 nA in shutdown mode, allowing power calculations to account for both active and dormant periods. Its 64-UFBGA 5x5 mm package helps meet wearable space constraints, although assembly and board-layout capability become important. The complete current budget must also include sensors, radios, regulators, indicator LEDs, and any peripheral leakage.
Recommandé
Building Control Endpoint
The STM32L422RBI6 fits a low-power building-control endpoint that monitors inputs and operates for long intervals between system events. Its 80 MHz Cortex-M4 core can execute control logic, debouncing, protocol handling, and local calculations, while USB provides a service or configuration interface when needed. The 128 KB Flash capacity accommodates application firmware and data structures, and 40 KB RAM is available for transient state and communication buffers. The verified 32 nA standby current is useful when the endpoint spends most of its time inactive. The 1.71 V to 3.6 V operating range supports design flexibility, but external relay drivers, sensor interfaces, and wired-network transceivers may require separate supplies and should be included in the complete power calculation.
Recommandé
Portable Measurement Instrument
The STM32L422RBI6 is appropriate for a portable measurement instrument that combines local signal processing with USB data transfer. Its Cortex-M4 with FPU operates up to 80 MHz and can manage sampling, filtering, calibration, and user commands, while 128 KB Flash and 40 KB RAM provide usable embedded storage without requiring a separate controller. USB simplifies connection to a computer or service fixture. For instruments that spend significant time between measurements, the verified 32 nA standby and 16 nA shutdown currents support battery-aware design, although the analog front end will often dominate total consumption. The 64-UFBGA package reduces footprint but demands capable assembly and inspection. Production validation should include analog settling, USB interoperability, thermal behavior, and battery-life measurements.
Recommandé
Compact Industrial Communication Module
The STM32L422RBI6 can serve as the control MCU in a compact industrial communication module requiring USB connectivity and low-power standby behavior. The 80 MHz Arm Cortex-M4 handles protocol framing, packet processing, diagnostics, and configuration, while 128 KB Flash and 40 KB RAM support moderately complex firmware. USB can provide a service, configuration, or host interface without a separate USB bridge, reducing component count. The 64-UFBGA 5x5 mm package supports compact module layouts, while the 1.71 V to 3.6 V supply range facilitates integration with low-voltage power systems. If the module idles between network transactions, the verified 32 nA standby condition can improve energy efficiency. Ethernet or other wired interfaces would require separate transceivers and careful isolation from the USB and control circuitry.
Recommandé
Données de référence d'ingénierie pour STM32L422RBI6 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | STM32L422RBT6 |
|---|---|---|
| Package | 64-UFBGA (5x5 mm) | 64-UFBGA (5x5 mm) - same |
| Brand | STMicroelectronics | STMicroelectronics |
| Processor Core | Arm Cortex-M4 with FPU | Arm Cortex-M4 with FPU |
| Maximum Core Frequency | 80 MHz | 80 MHz |
| Flash Memory | 128 KB | 128 KB |
| RAM | 40 KB | 40 KB |
| Supply Voltage Range | 1.71 V to 3.6 V | 1.71 V to 3.6 V |
| Connectivity | USB | USB |
| Shutdown Mode Current | 16 nA with 4 wakeup pins | 16 nA with 4 wakeup pins |
| Standby Mode Current | 32 nA with 4 wakeup pins | 32 nA with 4 wakeup pins |
| Standby Current with RTC | 245 nA | 245 nA |
Principaux différenciateurs
- Low-power mode performance (vs STM32L422RBT6)
- Processing and memory combination (vs STM32L422RBT6)
- Connected low-power architecture (vs STM32L422RBT6)
Notes de conception
Budget the complete sleep-mode power path, not only the MCU. The verified STM32L422xx family figures include 16 nA in shutdown, 32 nA in standby, and 245 nA in standby with RTC, but external pull resistors, sensors, transceivers, regulators, and leakage can dominate the board current. Confirm that unused GPIOs are configured without unwanted paths to ground or supply, and measure the assembled board with the intended peripheral states enabled.
The 64-UFBGA 5x5 mm land pattern requires close attention to PCB design and assembly. Use a manufacturer-supported footprint and stackup, place decoupling capacitors close to the relevant supply pins, and confirm the fabrication and assembly capability for the ball pitch and ball size. Because the supplied web evidence does not provide a complete ball map, engineers must derive the footprint and pin assignments directly from the official STM32L422xx datasheet rather than relying on a generic UFBGA library.
Do not treat a generic STM32L4 device as a drop-in replacement without verifying the exact 64-UFBGA ball assignment, firmware support, clock tree, USB implementation, memory organization, and low-power behavior. The verified cross-reference search produced tools and general guides rather than a confirmed pin-compatible replacement. For production use, compare the candidate's manufacturer ordering table and errata with the STM32L422RBI6 datasheet, then run boot, interrupt, USB, timing, and power-state validation on the assembled PCB.
Informations de conformité
The supplied web results do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. AEC-Q100 is not applicable because this is an industrial microcontroller rather than an automotive-qualified device. Exact compliance must be confirmed from the manufacturer product documentation.
