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STMicroelectronics STM32L422RBI6
- Part No.:
- STM32L422RBI6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-UFBGA
- Datasheet:
-
STM32L422RBI6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,945
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Product details
Overview
STM32L422RBI6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 80 MHz max frequency, 128 KB flash, 40 KB SRAM, and integrated AES hardware accelerator-designed for battery-powered IoT sensor nodes requiring sub-µA standby operation and secure firmware updates.
For engineers reviewing the STM32L422RBI6 datasheet, STM32L422RBI6 pinout, STM32L422RBI6 application, or STM32L422RBI6 equivalent, key selection criteria include VBAT mode current (300 nA), Stop 2 mode power (0.7 µA), 12-bit dual ADC (5 Msps), LPUART wake-up capability, and UFBGA64 package compatibility with high-density PCB layouts.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a flexible power architecture with seven low-power modes-including Shutdown (16 nA), Standby with RTC (245 nA), and Stop 2 (0.7 µA). Its interconnect matrix decouples bus arbitration to sustain real-time peripheral concurrency without CPU intervention.
It features dual 12-bit ADCs with hardware oversampling up to 16-bit resolution, one operational amplifier with programmable gain amplifier (PGA), and one ultra-low-power comparator-all supplied independently for analog signal integrity. The USB 2.0 full-speed interface operates crystal-less using internal 48 MHz HSI48 with clock recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, 100 DMIPS @ 80 MHz-enables real-time control and sensor fusion algorithms in constrained memory. |
| Flash / SRAM | 128 KB single-bank flash with readout protection; 40 KB SRAM (8 KB with hardware parity)-supports secure boot and fault-tolerant data logging. |
| Low-Power Modes | Shutdown: 16 nA; Standby with RTC: 245 nA; Stop 2: 0.7 µA-enables multi-year battery life in wireless sensor endpoints. |
| Analog Peripherals | 2× 12-bit ADC (5 Msps, 200 µA/Msps); 1× OPAMP with PGA; 1× ultra-low-power comparator-supports precision analog front-end for environmental sensing. |
| Crypto & Security | AES-128/256 hardware accelerator + TRNG + 96-bit unique ID-accelerates encrypted OTA updates and device authentication. |
| Communication | USB 2.0 FS (crystal-less), 3× I²C FM+, 3× USART, 1× LPUART, 2× SPI, QuadSPI-enables robust wired/wireless connectivity with minimal BOM cost. |
| Package | UFBGA64 (5 × 5 mm, 0.4 mm pitch)-supports compact, high-I/O-count designs in space-constrained wearables and smart meters. |
Pinout & Package
STM32L422RBI6 is housed in a 64-ball Ultra-Fine Pitch Ball Grid Array (UFBGA64) package with 0.4 mm ball pitch and 5 × 5 mm body size, optimized for automated assembly and thermal performance in high-density applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.71–3.6 V operation; decoupling required per datasheet layout guidelines to maintain low-noise analog performance. |
| VBAT | Backup power supply | Supplies RTC and 32×32-bit backup registers during main power loss; accepts coin-cell or supercap input. |
| PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2, PH0–PH1 | General-purpose I/Os | Up to 52 fast I/Os; most are 5 V-tolerant-enables direct interfacing with legacy logic and industrial sensors. |
| PA2/PA3 | USART2 TX/RX | Dedicated async serial interface supporting LIN, IrDA, and modem protocols-used for diagnostics and host communication. |
| PA4–PA7 | ADC1_IN1–ADC1_IN4 | Analog input channels for first ADC; support differential and single-ended acquisition with hardware oversampling. |
| PA13/PA14 | SWDIO/SWCLK | Serial Wire Debug interface-enables non-intrusive programming and real-time trace debugging without JTAG pins. |
| PC13 | RTC_OUT / TAMPER | RTC alarm output or tamper detection input-critical for time-stamped event logging and security monitoring. |
| PF0/PF1 | OSC_IN/OSC_OUT | Connects external 4–48 MHz crystal oscillator-required for precise timing in USB, audio, or motor control applications. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Seven configurable low-power modes with sub-µA quiescent currents-enables adaptive energy management across sensor sampling, processing, and transmission phases. |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz-eliminates cache misses and ensures deterministic interrupt latency for real-time control loops. |
| Dual 12-bit ADC with oversampling | Up to 16-bit effective resolution at 5 Msps with 200 µA/Msps power-delivers high-fidelity analog capture for gas, temperature, and pressure sensing. |
| Crystal-less USB 2.0 FS | Internal 48 MHz HSI48 with clock recovery-removes external crystal and matching capacitors, reducing BOM count and board area by ~12 mm². |
| Hardware AES engine | 128/256-bit key encryption with DMA-triggered operation-offloads CPU during secure firmware updates and encrypted sensor data transmission. |
| LPUART wake-up from Stop 2 | Asynchronous UART capable of waking CPU from 0.7 µA Stop 2 mode in <4 µs-enables responsive low-power communication without polling overhead. |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
Use Scenario: Battery-powered water/gas meter with hourly RF transmission and lifetime >10 years. IC Role / Device Role / Timing Role: Main system controller managing metrology ADC, LPUART-to-LoRaWAN bridge, RTC calendar, and AES-encrypted payload signing. Use Value: 245 nA Standby with RTC enables decade-long operation on a single CR2477 cell; LPUART wake-up eliminates continuous UART polling. | Use Scenario: Indoor air quality monitor with CO₂, VOC, and humidity sensing, transmitting via BLE every 5 minutes. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating analog inputs, running FFT-based noise filtering, and scheduling low-duty-cycle BLE advertising. Use Value: Dual ADCs sample multiple sensors simultaneously at 5 Msps; ART Accelerator ensures real-time FFT completion within 12 ms before entering Stop 2 mode. |
| Portable Medical Device | Industrial Predictive Maintenance Sensor |
Use Scenario: FDA-classified wearable ECG patch recording 3-lead signals for 72-hour ambulatory monitoring. IC Role / Device Role / Timing Role: Analog front-end controller with OPAMP+PGA for biopotential amplification, 12-bit ADC oversampling, and secure local storage. Use Value: Integrated OPAMP with PGA eliminates external instrumentation amplifier; 8 KB SRAM with parity ensures reliable ECG waveform buffering. | Use Scenario: Vibration and temperature sensor mounted on motor bearing, transmitting anomaly alerts via NB-IoT. IC Role / Device Role / Timing Role: Edge analytics node performing time-domain feature extraction (RMS, kurtosis) and FFT on accelerometer data before compression. Use Value: Cortex-M4 FPU accelerates floating-point math; 128 KB flash stores firmware + ML inference model; QuadSPI supports external XIP code expansion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L432KBU6 | Same core and peripherals but 256 KB flash, 64 KB SRAM, UFBGA32 package (32 balls) | Better suited for applications needing larger firmware (e.g., BLE stack + OTA) in smaller footprint | Select when higher flash density and reduced I/O count are acceptable trade-offs for lower pin count and cost. |
| STM32L552RET6 | ARMv8-M TrustZone®, 512 KB flash, 256 KB SRAM, 110 µA/MHz run mode, 420 nA shutdown | Required for certified secure boot, cryptographic key isolation, and PSA Level 1 compliance | Choose when hardware-enforced security boundaries and extended memory are mandatory for regulatory certification. |
Compared with STM32L422RBI6, the STM32L432KBU6 offers more memory in a smaller package but fewer I/Os and no QuadSPI, while the STM32L552RET6 adds TrustZone security and higher performance at increased power and cost-making the L422 optimal for cost-sensitive, battery-limited edge nodes where basic crypto suffices.
Availability
STM32L422RBI6 is available at Aetrix Electronics and suitable for smart utility metering, wireless sensor nodes, portable medical devices, and industrial predictive maintenance sensors requiring stable component supply and long-term lifecycle assurance.
Supply support for STM32L422RBI6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering microcontrollers, power ICs, MEMS, and automotive-grade components with focus on energy efficiency and reliability.
The STM32L4 series targets ultra-low-power embedded applications-from battery-operated wearables to industrial IoT endpoints-balancing performance, security, and energy efficiency through patented FlexPowerControl and ART Accelerator technologies.
FAQ
What is the maximum operating temperature range for STM32L422RBI6?
The STM32L422RBI6 is qualified for industrial operation from –40 °C to +85 °C, with extended variants rated to +125 °C. This range is validated per JEDEC JESD47 and supports deployment in outdoor metering, automotive cabin modules, and factory-floor sensors without derating.
Does STM32L422RBI6 support hardware-accelerated SHA or ECC?
No, STM32L422RBI6 does not include dedicated SHA or ECC accelerators. It provides AES-128/256 and TRNG for symmetric encryption and key generation, but elliptic-curve operations must be performed in software using the Cortex-M4 FPU-suitable for lightweight TLS handshakes but not high-throughput PKI.
Can the internal 32 kHz RC oscillator drive the RTC reliably?
Yes-the internal 32 kHz LSI RC oscillator (±5% accuracy) can drive the RTC in applications where absolute timekeeping precision is not critical (e.g., periodic wake-up timers). For calendar-grade accuracy, the external 32.768 kHz LSE crystal is required, achieving ±20 ppm stability over temperature and voltage.
Is the UFBGA64 package of STM32L422RBI6 compatible with standard reflow profiles?
Yes, the UFBGA64 package complies with IPC/JEDEC J-STD-020 moisture sensitivity level 3 and supports standard lead-free reflow profiles (peak 260 °C, 60-second duration above 217 °C). ST recommends pre-bake if exposed to ambient >60% RH for >12 hours prior to reflow.
STM32L422RBI6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-UFBGA
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- I2C, Infrared, IrDA, LINbus, Quad SPI, SPI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, PWM, WDT
- Number of I/O:
- 52
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 40K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L422RBI6 FAQ
1.How can I place an order for STM32L422RBI6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L422RBI6 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for STM32L422RBI6 reliable?
The price and inventory of STM32L422RBI6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L422RBI6 is usually 5 days.
3.What payment methods are accepted for STM32L422RBI6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L422RBI6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L422RBI6?
STM32L422RBI6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L422RBI6 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for STM32L422RBI6?
For technical support, including STM32L422RBI6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L422RBI6 requirements.
6.How does Aetrix verify that STM32L422RBI6 is sourced from the original manufacturer or authorized distributors?
All STM32L422RBI6 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32L422RBI6 meets industry standards.
7.What is the process for return or replacement of STM32L422RBI6?
All STM32L422RBI6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L422RBI6, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The STM32L422RBI6 part is unused and in its original packaging.
Return procedure for STM32L422RBI6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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