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STMicroelectronics STM32L4S7AII6
- Part No.:
- STM32L4S7AII6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 169-UFBGA
- Datasheet:
-
STM32L4S7AII6.pdf
- Description:
- IC MCU 32BIT 2MB FLASH 169UFBGA
- Quantity:
- Payment:
- Shipping:
Inventory:3,729
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Product details
Overview
STM32L4S7AII6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, 120 MHz max frequency, 2 MB Flash, 640 KB SRAM, and integrated MIPI DSI Host + LCD-TFT controller. It delivers 150 DMIPS and supports advanced graphics, AES+HASH encryption, and capacitive touch sensing - deployed in battery-powered medical monitors and portable HMI displays.
For engineers reviewing the STM32L4S7AII6 datasheet, STM32L4S7AII6 pinout, STM32L4S7AII6 application, or STM32L4S7AII6 equivalent, key selection criteria include ultra-low-power operation (33 nA Shutdown), dual-bank Flash with read-while-write, hardware-accelerated graphics (DMA2D + GFXMMU), MIPI DSI interface for embedded display panels, and cryptographic acceleration for secure firmware updates.
Technical Context
This MCU integrates an adaptive real-time accelerator (ART) enabling zero-wait-state execution from Flash at 120 MHz, alongside a multi-AHB interconnect matrix that decouples CPU, DMA, and peripheral bus traffic to sustain high throughput during concurrent graphics rendering and sensor data acquisition.
The device features three independent PLLs - one for system clock, one for USB/audio, and one for ADC - plus dedicated low-power timers available in Stop mode, dual Octo-SPI interfaces for external memory expansion, and a 14-channel DMA controller supporting scatter-gather transfers for camera and audio streaming.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 120 MHz max, 150 DMIPS - enables real-time DSP and control algorithms without external co-processor |
| Memory | 2 MB dual-bank Flash (read-while-write), 640 KB SRAM (64 KB with parity) - supports safe over-the-air firmware updates and robust data logging |
| Power Modes | 33 nA Shutdown, 125 nA Standby, 420 nA Standby+RTC - extends battery life in always-on wearable and IoT edge nodes |
| Graphics Interface | MIPI DSI Host (2 lanes @ 500 Mbit/s each) + LCD-TFT controller - drives high-resolution color displays up to WXGA without external display bridge IC |
| Cryptography | AES-128/256 + SHA-256 hardware accelerator - offloads encryption/decryption from CPU, reducing latency and power for secure boot and TLS stack |
| Analog Peripherals | 12-bit ADC @ 5 Msps (16-bit oversampled), 2× DAC, 2× op-amps with PGA, 2× comparators - supports precision sensor signal conditioning and analog output control |
| Communication | USB OTG FS, CAN 2.0B, 6× USART, 4× I²C, 3× SPI, 2× SAI, SDMMC - enables full connectivity in industrial gateways and diagnostic tools |
Pinout & Package
STM32L4S7AII6 is housed in a UFBGA169 (7 × 7 mm, 0.4 mm pitch) package with 132 user I/Os, most 5 V-tolerant, and up to 14 I/Os configurable for independent supply down to 1.08 V - optimized for compact, multi-rail embedded designs requiring mixed-voltage interfacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.71–3.6 V operation; multiple VDD/VSS pairs ensure stable core and I/O domain decoupling |
| VDDA, VSSA | Analog power and ground | Independent analog supply rail for ADC/DAC/OPAMP - critical for noise-sensitive precision measurements |
| VBAT | Backup power input | Supplies RTC and 32×32-bit backup registers in shutdown - enables calendar retention on coin-cell battery |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; compatible with external reset supervisors and push-button recovery |
| PA0–PA15, PB0–PB15, etc. | General-purpose I/Os | 136 fast I/Os with configurable pull-up/down, alternate functions, and 5 V tolerance - simplifies level-shifting in legacy interface designs |
| DSI_D0P/N, DSI_D1P/N, DSI_CLKN/P | MIPI DSI differential lanes | Dedicated high-speed differential pairs for display interface - eliminates need for external DSI serializer/deserializer |
| LTDC_R0–R7, G0–G7, B0–B7, HSYNC, VSYNC, DE | LCD-TFT parallel interface | Direct RGB interface supporting up to 24-bit color depth and WXGA resolution - enables direct connection to TFT panels |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Enables 33 nA Shutdown and 5 µs wakeup from Stop - reduces average power in duty-cycled sensor nodes by >90% |
| Chrom-ART Accelerator (DMA2D) | Hardware bitmap blending, format conversion, and layer composition - cuts CPU load by ~70% in GUI rendering tasks |
| Chrom-GRC (GFXMMU) | Dynamic graphic memory mapping with 20% resource optimization - allows larger framebuffers within constrained SRAM |
| Dual Octo-SPI interfaces | Supports XIP and execute-in-place from external flash or PSRAM - expands code space beyond on-chip Flash without performance penalty |
| Capacitive touch sensing (TSC) | 24-channel support for touchkey, linear, and rotary sensors - enables intuitive HMI without external touch controller IC |
| True random number generator (RNG) | FIPS-compliant entropy source - provides cryptographically secure keys for TLS handshake and secure boot verification |
Applications
| Portable Medical Monitor | Smart Industrial HMI |
|---|---|
Use Scenario: Handheld vital sign monitor with color TFT display, ECG front-end, and Bluetooth LE telemetry. IC Role / Device Role / Timing Role: Main application processor managing sensor acquisition, real-time waveform rendering via LTDC+DSI, and encrypted data transmission. Use Value: Ultra-low-power modes extend battery runtime to >72 hours; hardware AES ensures HIPAA-compliant data encryption at rest and in transit. |
Use Scenario: Panel-mounted machine status dashboard with touch interface, CAN bus integration, and local data logging. IC Role / Device Role / Timing Role: Central controller handling CAN message routing, capacitive touch response, and MIPI-driven display update at 60 Hz. Use Value: Dual-bank Flash enables seamless firmware updates without halting machine operation; TSC supports glove-compatible UI navigation. |
| Secure Firmware Update Gateway | Low-Power Vision Edge Node |
Use Scenario: Field-deployable gateway validating and installing signed firmware images over cellular or Ethernet. IC Role / Device Role / Timing Role: Secure boot root-of-trust executing signature verification using HASH+AES accelerators before loading new image. Use Value: Hardware crypto engine achieves 2.5× faster signature validation vs. software-only implementation, reducing update window and attack surface. |
Use Scenario: Battery-powered visual inspection node capturing grayscale images via DCMI and performing basic defect detection. IC Role / Device Role / Timing Role: Image acquisition controller interfacing 8–14-bit camera sensor, buffering frames in SRAM, and running lightweight CNN inference on Cortex-M4. Use Value: 5 Msps ADC and 120 MHz CPU enable real-time pixel processing; Stop-mode wakeup in 5 µs supports event-triggered capture with minimal latency. |
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 |
|---|---|---|---|
| STM32L4S5VI6 | Same core, Flash, and peripherals but lacks MIPI DSI Host - only includes LTDC controller | Suitable for parallel RGB displays only; cannot drive modern DSI-based OLED/LCD panels | Select when display interface is limited to traditional TFTs and cost reduction is prioritized over DSI flexibility |
| STM32L4S9VIT6 | Identical package and pinout, but adds Chrom-ART + Chrom-GRC enhancements and higher SRAM (up to 1 MB) | Better suited for complex GUIs with layered animations and larger framebuffer requirements | Choose when application demands >640 KB SRAM or advanced graphics compositing not needed in base L4S7 variant |
Compared with STM32L4S5VI6, the STM32L4S7AII6 adds MIPI DSI for modern display ecosystems; versus STM32L4S9VIT6, it trades 384 KB SRAM and minor graphics optimizations for lower unit cost while retaining identical DSI, crypto, and power-performance specs.
Availability
STM32L4S7AII6 is available at Aetrix Electronics and suitable for portable medical devices, industrial HMIs, secure firmware gateways, and battery-powered vision edge nodes requiring stable component supply across long product lifecycles.
Supply support for STM32L4S7AII6 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, sensors, and automotive-grade components.
The STM32L4S series targets ultra-low-power embedded applications demanding high performance, advanced graphics, and hardware security - specifically engineered for next-generation portable and connected industrial devices.
FAQ
What is the maximum operating temperature range for STM32L4S7AII6?
The STM32L4S7AII6 is rated for industrial operation from –40 °C to +85 °C. Its thermal design supports sustained 120 MHz operation under ambient conditions up to 85 °C when properly heatsinked and decoupled, with derating applied above 70 °C per ST's AN5247 guidelines.
Does STM32L4S7AII6 support USB device mode with battery charging detection (BCD)?
Yes, the integrated USB OTG 2.0 full-speed controller supports Battery Charging Detection (BCD) per USB Battery Charging Specification v1.2. This enables automatic identification of standard downstream ports, charging downstream ports, and dedicated chargers - essential for portable devices with USB-C power delivery.
Can the MIPI DSI interface drive a 1080p display?
No - the STM32L4S7AII6's MIPI DSI Host supports two lanes at up to 500 Mbit/s each (1 Gbit/s total), sufficient for WXGA (1366×768) at 60 Hz with 24-bit color. Driving native 1080p requires ≥1.5 Gbit/s bandwidth, exceeding this implementation's capability.
Is the 2 MB Flash memory organized as a single bank or dual banks?
The 2 MB Flash is split into two independent 1 MB banks, enabling true read-while-write operation: one bank can execute code while the other is erased or programmed. This architecture is mandatory for fail-safe over-the-air firmware updates without application interruption.
STM32L4S7AII6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 169-UFBGA
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 120MHz
- Connectivity:
- CANbus, EBI/EMI, I2C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT
- Number of I/O:
- 140
- Program Memory Size:
- 2MB (2M x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 640K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 16x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L4S7AII6 FAQ
1.How can I place an order for STM32L4S7AII6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L4S7AII6 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 STM32L4S7AII6 reliable?
The price and inventory of STM32L4S7AII6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L4S7AII6 is usually 5 days.
3.What payment methods are accepted for STM32L4S7AII6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L4S7AII6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L4S7AII6?
STM32L4S7AII6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L4S7AII6 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 STM32L4S7AII6?
For technical support, including STM32L4S7AII6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L4S7AII6 requirements.
6.How does Aetrix verify that STM32L4S7AII6 is sourced from the original manufacturer or authorized distributors?
All STM32L4S7AII6 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 STM32L4S7AII6 meets industry standards.
7.What is the process for return or replacement of STM32L4S7AII6?
All STM32L4S7AII6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L4S7AII6, 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 STM32L4S7AII6 part is unused and in its original packaging.
Return procedure for STM32L4S7AII6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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