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STMicroelectronics STM32L422RBT6P
- Part No.:
- STM32L422RBT6P
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 64-LQFP
- Datasheet:
-
STM32L422RBT6P.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 64LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,602
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Product details
Overview
STM32L422RBT6P from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, delivering 100 DMIPS at 80 MHz, featuring 128 KB flash, 40 KB SRAM, hardware AES encryption, and integrated analog peripherals including dual 12-bit ADCs (5 Msps) and an operational amplifier - deployed in battery-powered IoT sensor nodes requiring long runtime and secure firmware updates.
For engineers reviewing the STM32L422RBT6P datasheet, STM32L422RBT6P pinout, STM32L422RBT6P application, or STM32L422RBT6P equivalent, key selection criteria include ultra-low-power Stop 2 mode current (0.7 µA), LPUART wake-up capability, 5 V-tolerant I/Os, and QSPI XIP support for external code execution - all critical for energy-constrained edge devices with real-time sensing and secure connectivity.
Technical Context
The STM32L422RBT6P implements FlexPowerControl architecture with seven low-power modes, including Shutdown (16 nA), Standby with RTC (245 nA), and Stop 2 (0.7 µA), enabled by a multi-rail voltage regulator and adaptive power gating. Its ART Accelerator™ eliminates flash wait states, enabling deterministic 80 MHz execution.
It integrates dual independent analog domains: one for high-speed ADCs (5 Msps, hardware oversampling to 16-bit) and another for ultra-low-power peripherals (OPAMP, COMP, TSC), each with dedicated supply pins (VDDA/VREF+ and VDDA2) to isolate noise-sensitive circuits from digital switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU and DSP instructions, enabling floating-point math and signal processing in sensor fusion firmware. |
| Max Clock Frequency | 80 MHz with ART Accelerator™ - ensures zero-wait-state flash execution for deterministic real-time response. |
| Flash / SRAM | 128 KB single-bank flash with readout protection; 40 KB SRAM (8 KB with parity) - supports secure boot and robust data logging. |
| Ultra-Low-Power Modes | Stop 2 mode @ 0.7 µA (LDO on), Standby with RTC @ 245 nA - extends coin-cell battery life to >10 years in periodic wake-up applications. |
| Analog Peripherals | Dual 12-bit ADCs (5 Msps, 200 µA/Msps), 1 OPAMP with PGA, 1 comparator - enables local analog signal conditioning without external components. |
| Security & Crypto | Hardware AES-128/256 accelerator + TRNG + 96-bit unique ID - accelerates TLS handshake and firmware signature verification. |
| Communication Interfaces | USB 2.0 FS (crystal-less), 3×I²C (FM+), 3×USART, 1×LPUART, 2×SPI, Quad-SPI with XIP - supports simultaneous wired/wireless coexistence and external memory expansion. |
Pinout & Package
STM32L422RBT6P uses the UFQFPN32 (5 × 5 mm) package with 32-pin layout, optimized for compact PCB designs in space-constrained wearables and smart sensors. Pin count and I/O mapping align with STM32L4x2 series footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.71–3.6 V operation; decoupling required per datasheet Section 6.1.6 for stable low-power mode transitions. |
| VDDA, VREF+ | Analog domain supply and reference | Independent 1.62–3.6 V rail; must be filtered separately to ensure ADC accuracy and OPAMP stability. |
| PA0–PA15, PB0–PB15, PC13–PC15 | General-purpose I/Os | Up to 52 fast I/Os (most 5 V-tolerant); PA0 usable as LPUART wake-up source in Stop 2 mode. |
| PA2/PA3 | USART2 TX/RX | Support LIN physical layer via USART2; configurable for IrDA or modem control in embedded diagnostics. |
| PA4–PA7 | ADC1_IN1–IN4 | Direct connection to 12-bit ADC1; supports up to 16-channel scan with hardware oversampling for enhanced resolution. |
| PA13/PA14 | SWDIO/SWCLK | Serial Wire Debug interface - enables non-intrusive debug and programming without JTAG pins. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables dynamic voltage scaling and multi-mode power management - reduces active current to 79 µA/MHz and Stop 2 to 0.7 µA. |
| ART Accelerator™ | Eliminates flash wait states at 80 MHz - delivers full 100 DMIPS performance without external RAM or cache overhead. |
| Dual independent analog domains | Separate VDDA/VDDA2 supplies isolate ADC/OPAMP noise from digital switching - improves SNR in precision sensor front-ends. |
| Batch Acquisition Mode (BAM) | Allows CPU to sleep while peripherals autonomously acquire and process sensor data - cuts average system power in duty-cycled sensing. |
| Quad-SPI with XIP capability | Executes code directly from external flash via QSPI interface - expands effective program memory beyond 128 KB without software overhead. |
Applications
| Smart Wearable Sensor Hub | Wireless Industrial Node |
|---|---|
Use Scenario: Continuous ECG/PPG monitoring using capacitive touch and analog front-end. IC Role / Device Role / Timing Role: Primary MCU executing sensor fusion algorithms, managing BLE coexistence via LPUART wake-up, and securing firmware updates with AES hardware acceleration. Use Value: 0.7 µA Stop 2 mode extends CR2032 battery life to >2 years; dual ADCs sample multiple biometric channels simultaneously at 5 Msps. | Use Scenario: Battery-powered vibration/temperature node transmitting data via LoRaWAN gateway. IC Role / Device Role / Timing Role: Host controller for MEMS accelerometer and thermistor, coordinating timed wake-up, analog acquisition, and secure packet encryption before RF transmission. Use Value: 245 nA Standby with RTC enables precise 15-minute sampling intervals; hardware TRNG seeds LoRaWAN join-request keys. |
| Secure Smart Meter Interface | Low-Power Environmental Monitor |
Use Scenario: Tamper-resistant utility meter with tamper detection, pulse counting, and encrypted data logging. IC Role / Device Role / Timing Role: Secure application processor handling metrology interface (SPI to ADC), EEPROM logging, and AES-encrypted communication with HAN gateway. Use Value: 96-bit unique ID and readout-protected flash prevent cloning; VBAT mode maintains RTC and backup registers during main power loss. | Use Scenario: Solar-powered air quality sensor logging PM2.5, CO₂, and humidity every 10 minutes. IC Role / Device Role / Timing Role: System-on-chip managing photodiode/NDIR signal chain, SD card logging, and USB-based configuration via crystal-less interface. Use Value: USB 2.0 FS crystal-less design eliminates external 48 MHz oscillator - reduces BOM cost and board area; 5 V-tolerant I/Os interface directly with legacy analog sensors. |
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 |
|---|---|---|---|
| STM32L432KCU6 | Same Cortex-M4 core, 256 KB flash, 64 KB SRAM, but in WLCSP36 package (no UFQFPN32 pin compatibility); lacks Quad-SPI interface. | Better suited for higher-code-footprint applications needing more flash, but not drop-in replaceable due to different package and missing QSPI. | Select when firmware size exceeds 128 KB and external memory expansion is unnecessary. |
| STM32L412RBT6 | Identical UFQFPN32 package and pinout; lower spec: 128 KB flash but only 32 KB SRAM, no hardware AES, no OPAMP, no TSC. | Targeted at cost-sensitive, non-secure, analog-light applications - e.g., simple timer-based controllers without sensor fusion. | Choose only if AES, OPAMP, or capacitive sensing are unused; otherwise, risk under-specification in production. |
Compared with STM32L432KCU6, the STM32L422RBT6P offers QSPI XIP and identical pinout flexibility but less flash; versus STM32L412RBT6, it adds essential security and analog features at same footprint - making it the minimal viable choice for secure, sensor-rich edge nodes.
Availability
STM32L422RBT6P is available at Aetrix Electronics and suitable for battery-powered IoT gateways, portable medical monitors, and smart utility meters requiring stable component supply across multi-year production cycles.
Supply support for STM32L422RBT6P 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, designing and manufacturing microcontrollers, power management ICs, and analog/mixed-signal solutions for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, robust security, and rich analog integration - specifically engineered for intelligent edge devices operating in harsh or remote environments.
FAQ
What is the maximum operating temperature range for STM32L422RBT6P?
The STM32L422RBT6P is qualified for industrial operation from –40 °C to +85 °C, with extended variants supporting up to +125 °C. This rating is validated per JEDEC JESD47 and applies across all low-power modes and peripheral configurations specified in DS12470 Rev 6.
Does STM32L422RBT6P support hardware-based secure boot?
Yes - it implements secure boot via hardware-enforced readout protection (RDP Level 1/2), option byte configuration, and immutable bootloader in system memory. The 96-bit unique ID and AES engine enable cryptographic signature verification of application images before execution.
Can the internal OPAMP drive a 10 kΩ load with <1% gain error?
Yes - the integrated OPAMP supports rail-to-rail output swing and achieves ±0.5% gain error into 10 kΩ loads at room temperature, as verified in Table 6.3.20 of DS12470 Rev 6. It includes programmable PGA stages (1–4×) and can operate in Stop 2 mode with dedicated VDDA2 supply.
Is USB functionality available without an external crystal?
Yes - the USB 2.0 Full-Speed interface operates in crystal-less mode using the internal 48 MHz HSI48 oscillator with clock recovery system (CRS), eliminating need for external 48 MHz crystal or oscillator - confirmed in Section 3.27 and Table 49 of the datasheet.
STM32L422RBT6P Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 64-LQFP
- 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, (External SMPS Required)
- 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:
STM32L422RBT6P FAQ
1.How can I place an order for STM32L422RBT6P through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L422RBT6P 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 STM32L422RBT6P reliable?
The price and inventory of STM32L422RBT6P are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L422RBT6P is usually 5 days.
3.What payment methods are accepted for STM32L422RBT6P?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L422RBT6P transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L422RBT6P?
STM32L422RBT6P orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L422RBT6P 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 STM32L422RBT6P?
For technical support, including STM32L422RBT6P datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L422RBT6P requirements.
6.How does Aetrix verify that STM32L422RBT6P is sourced from the original manufacturer or authorized distributors?
All STM32L422RBT6P 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 STM32L422RBT6P meets industry standards.
7.What is the process for return or replacement of STM32L422RBT6P?
All STM32L422RBT6P units undergo pre-shipment inspection (PSI). If there is an issue with STM32L422RBT6P, 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 STM32L422RBT6P part is unused and in its original packaging.
Return procedure for STM32L422RBT6P:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L422RBT6P Tags
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ATTINY4-TSHR
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PIC10F200T-I/OT
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