STMicroelectronics STM32L4S9ZIJ6, ARM Cortex-M4 32-bit MCU, 120 MHz, 2 MB Flash, 640 KB SRAM, 112 I/O, 144-UFBGA, -40°C to 85°C.
| Parameter | Value |
|---|---|
| Series | STM32L4S |
| Mounting | Surface Mount |
| Oscillator type | Internal |
| Program memory type | FLASH |
| Voltage - supply (Vcc (Vdd)) | 1.71V ~ 3.6V |
| Operating temperature | -40°C~85°C(TA) |
| Speed | 120MHz |
| Package | Tray |
| RAM size | 640K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, LCD, POR, PWM, WDT |
| Connectivity | CANbus, EBI/EMI, I²C, IrDA, LINbus, MMC/SD, SAI, SPI, UART/USART, USB OTG |
| Number of i (O) | 112 |
| Core processor | ARM® Cortex®-M4 |
| Case | 144-UFBGA |
| Data converters | A/D 16x12b; D/A 2x12b |
| Program memory size | 2MB (2M x 8) |
It packs 2 MB of Flash and 640 KB of SRAM, giving firmware teams room for DSP libraries, dual-bank OTA updates, or a full RTOS with multiple application stacks without adding external memory.
The ball pitch is sub-0.8 mm, so the PCB requires at least four layers with microvias for fanout.
The STM32L4S5ZIJ6 shares the same base package and pinout within the STM32L4S series, but the memory and peripheral mix differ. Verify the pin assignment against your schematic — the datasheet pin maps confirm compatibility for the shared function groups.