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STMicroelectronics STM32L422CBT6
- Part No.:
- STM32L422CBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L422CBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,074
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Product details
Overview
STM32L422CBT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 128 KB flash, 40 KB SRAM, and integrated analog peripherals including dual 12-bit ADCs (5 Msps), one operational amplifier with PGA, and one ultra-low-power comparator. It operates from 1.71–3.6 V, supports -40 °C to 85 °C, and delivers 100 DMIPS at 80 MHz - used in battery-powered IoT sensor nodes requiring long runtime and precision analog sensing.
For engineers reviewing the STM32L422CBT6 datasheet, STM32L422CBT6 pinout, STM32L422CBT6 application, or STM32L422CBT6 equivalent, key selection criteria include its 245 nA Standby-with-RTC current, USB 2.0 full-speed crystal-less interface, AES-128/256 hardware accelerator, and LQFP32 (7×7 mm) package with 25 I/Os - all critical for compact, secure, low-power edge devices.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, alongside a memory protection unit (MPU) and proprietary code readout protection. Its FlexPowerControl architecture supports seven low-power modes - including Stop 2 (0.7 µA), Standby with RTC (245 nA), and Shutdown (16 nA) - managed via dedicated power control registers and interconnect matrix routing.
Peripherals are partitioned across voltage domains: analog blocks (ADC, OPAMP, COMP) operate on independent supplies for noise isolation; USB uses internal 48 MHz HSI48 clock with clock recovery; and capacitive touch sensing (TSC) supports up to 12 channels with hardware-accelerated acquisition - all synchronized via the embedded 96-bit unique ID and CRC calculation unit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | Arm Cortex-M4 with FPU, 80 MHz max frequency, 100 DMIPS performance - enables real-time DSP and control algorithms without external co-processor. |
| Memory | 128 KB single-bank Flash (with readout protection), 40 KB SRAM (8 KB with hardware parity) - supports secure firmware storage and robust data buffering in safety-critical logging. |
| Low-Power Modes | 245 nA Standby with RTC, 0.7 µA Stop 2 mode, 4 µs wakeup - allows multi-year battery life in periodic-sensing applications like environmental monitors. |
| Analog Peripherals | Dual 12-bit ADCs (5 Msps, 16-bit oversampling), 1 OPAMP with PGA, 1 ultra-low-power comparator - enables high-resolution sensor signal conditioning with minimal external components. |
| Connectivity | USB 2.0 FS crystal-less, 3× I²C (FM+), 3× USART, 1× LPUART, 2× SPI, Quad-SPI with XIP - supports direct sensor-to-cloud connectivity and external memory expansion without timing jitter. |
| Security & RNG | AES-128/256 hardware accelerator, true random number generator (TRNG), 96-bit unique ID - meets basic requirements for firmware encryption and secure device authentication. |
| Package | LQFP32 (7 × 7 mm, 0.8 mm pitch), 25 I/Os (most 5 V-tolerant) - fits space-constrained PCB layouts while maintaining compatibility with standard reflow processes. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch) with 32 pins; 25 general-purpose I/Os (most 5 V-tolerant), 3 dedicated power/ground pins (VDD, VSS, VDDA/VSSA), and 4 dedicated debug/reset pins (NRST, SWDIO, SWCLK, BOOT0).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main digital power supply and ground | Supplies core logic; decoupling required within 10 mm of pin to maintain <100 mV ripple in active mode. |
| VDDA, VSSA | Analog domain power and ground | Isolates ADC/OPAMP/COMP from digital noise; must be filtered separately with ferrite bead + 100 nF capacitor. |
| PA0–PA15, PB0–PB12 | General-purpose I/Os | 25 configurable pins supporting multiple alternate functions (USART, SPI, I²C, TIM); most tolerate 5 V inputs even at 1.8 V VDD. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; requires external 100 nF capacitor for reliable power-on reset timing per ST AN4828. |
| SWDIO / SWCLK | Serial Wire Debug interface | Two-pin debug port supporting full SWD protocol - enables programming, real-time trace, and breakpoint debugging without JTAG overhead. |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Seven low-power modes with sub-µA standby and 4 µs wakeup - reduces average system current by >90% vs. conventional Cortex-M4 MCUs in duty-cycled sensing. |
| ART Accelerator™ | Zero-wait-state execution from flash at 80 MHz - eliminates external RAM dependency for deterministic real-time response in motor control loops. |
| Dual 12-bit ADCs with hardware oversampling | Up to 16-bit effective resolution at 5 Msps - replaces external sigma-delta ADC in high-precision temperature/pressure sensor front-ends. |
| USB 2.0 full-speed crystal-less | Internal 48 MHz HSI48 oscillator with clock recovery - removes external crystal and matching capacitors, saving BOM cost and board area in portable devices. |
| Capacitive touch sensing controller (TSC) | 12-channel hardware-accelerated acquisition with built-in charge transfer - enables robust touchkey and slider interfaces without host CPU intervention. |
Applications
| Smart Utility Meter | Wearable Health Monitor |
|---|---|
Use Scenario: Battery-operated gas/water meter with hourly pressure/temperature readings and LoRaWAN transmission. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, AES-encrypted data packaging, USB-based field configuration, and ultra-low-power sleep scheduling. Use Value: 245 nA Standby-with-RTC enables >10-year battery life; LPUART wake-up ensures responsive commissioning without continuous polling. | Use Scenario: Chest-strap ECG monitor sampling at 250 Hz with real-time R-peak detection and Bluetooth LE streaming. IC Role / Device Role / Timing Role: Signal acquisition hub interfacing analog front-end, running QRS detection algorithm, and managing BLE connection intervals. Use Value: Dual ADCs with hardware oversampling achieve 14-bit ENOB at 250 Hz; Stop 2 mode (0.7 µA) extends runtime between charges. |
| Industrial Predictive Maintenance Sensor | Asset Tracking Beacon |
Use Scenario: Vibration and temperature node mounted on rotating machinery, transmitting FFT features every 5 minutes via NB-IoT. IC Role / Device Role / Timing Role: Real-time vibration analysis engine using DSP instructions, accelerometer interface, and secure OTA firmware update handler. Use Value: Cortex-M4 FPU accelerates FFT computation; AES hardware encrypts firmware images before flash write - preventing unauthorized updates. | Use Scenario: GPS-disabled logistics tag reporting location via Wi-Fi fingerprinting and cellular triangulation every 6 hours. IC Role / Device Role / Timing Role: Power-aware coordinator managing GPS assist data download, RF calibration, and deep-sleep state transitions. Use Value: 16 nA Shutdown mode with 4 wakeup pins enables >5-year shelf life; internal 32 kHz RC (±5%) maintains accurate timekeeping during transport. |
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 L4 series, but 256 KB flash, 64 KB SRAM, UFBGA48 (3×3 mm), no USB crystal-less - requires external 48 MHz crystal. | Higher memory capacity suits complex BLE stack integration; smaller package benefits ultra-compact designs. | Select when >128 KB flash is needed and board space permits UFBGA48 rework capability. |
| STM32L552RET6 | Next-generation L5 series with TrustZone, 512 KB flash, 256 KB SRAM, 110 µA/MHz run current - higher performance but 2× higher active power than L422. | Required for PSA Level 1 certified secure boot and encrypted firmware storage in regulated medical devices. | Select only when hardware-enforced security isolation is mandatory; otherwise L422 offers better µA/DMIPS efficiency. |
Compared with STM32L432KCU6 and STM32L552RET6, the STM32L422CBT6 provides optimal balance of ultra-low standby current (245 nA), USB crystal-less convenience, and LQFP32 manufacturability - making it preferred for cost-sensitive, battery-limited industrial sensors where security and memory headroom are secondary to power and ease of assembly.
Availability
STM32L422CBT6 is available at Aetrix Electronics and suitable for smart utility meters, wearable health monitors, industrial predictive maintenance sensors, and asset tracking beacons requiring stable component supply across multi-year production cycles.
Supply support for STM32L422CBT6 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 ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding extended battery life, rich analog integration, and secure firmware execution - optimized for IoT endpoints where energy efficiency and peripheral consolidation are primary design constraints.
FAQ
What is the maximum operating frequency and core type of STM32L422CBT6?
The STM32L422CBT6 features an Arm Cortex-M4 core with FPU, rated for up to 80 MHz operation. It achieves 100 DMIPS performance and supports DSP instructions. The ART Accelerator™ enables zero-wait-state execution from flash memory, ensuring deterministic timing for real-time control tasks without external cache.
Does STM32L422CBT6 support USB without an external crystal?
Yes - it integrates a 48 MHz HSI48 oscillator with clock recovery system (CRS), enabling USB 2.0 full-speed communication without an external crystal or trimming capacitors. This reduces BOM count and PCB area, and is validated per USB-IF compliance tests in ST's AN5024 application note.
What low-power modes are available and what are their typical currents?
It supports seven low-power modes: Shutdown (16 nA), Standby (32 nA), Standby with RTC (245 nA), Stop 2 (0.7 µA), and Run mode (79 µA/MHz). Current values are measured at 3.3 V, 25 °C, with ART enabled and flash active - documented in Table 25 of DS12470 Rev 6.
Which package and pin count does STM32L422CBT6 use?
The STM32L422CBT6 uses the LQFP32 package: 32-pin, 7 × 7 mm body, 0.8 mm pitch. It provides 25 general-purpose I/Os (most 5 V-tolerant), 3 power/ground pins (VDD/VSS/VDDA/VSSA), and dedicated debug/reset signals (SWDIO, SWCLK, NRST, BOOT0) - fully compliant with JEDEC MO-217 standards.
STM32L422CBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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
- Number of I/O:
- 38
- 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 10x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L422CBT6 FAQ
1.How can I place an order for STM32L422CBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L422CBT6 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 STM32L422CBT6 reliable?
The price and inventory of STM32L422CBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L422CBT6 is usually 5 days.
3.What payment methods are accepted for STM32L422CBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L422CBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L422CBT6?
STM32L422CBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L422CBT6 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 STM32L422CBT6?
For technical support, including STM32L422CBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L422CBT6 requirements.
6.How does Aetrix verify that STM32L422CBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L422CBT6 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 STM32L422CBT6 meets industry standards.
7.What is the process for return or replacement of STM32L422CBT6?
All STM32L422CBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L422CBT6, 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 STM32L422CBT6 part is unused and in its original packaging.
Return procedure for STM32L422CBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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