STM32L4 in STM32 Family
The STM32L4 series by STMicroelectronics is a family of ultra-low-power microcontrollers based on the high-performance Arm Cortex-M4 32-bit RISC core. Operating at frequencies up to 120 MHz, these MCUs balance processing power with industry-leading energy efficiency. They feature an integrated Floating Point Unit (FPU), a full set of DSP instructions, and a memory protection unit to enhance application security and computational speed for demanding embedded tasks while maintaining minimal current draw.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | I/O Pins | Package | Stock |
|---|---|---|---|
| STM32L4S5QII6 (STMicroelectronics) | 110 | UFBGA-132 | 48,666 |
| STM32L4S5VIT6 (STMicroelectronics) | 83 | LQFP-100 | 1,354 |
| STM32L4R5VIT6 (STMicroelectronics) | 83 | LQFP-100 | 324 |
The STM32L4 sub-family differentiates variants primarily through Flash memory capacity, ranging from 256 KB to 2 MB, and SRAM density. Physical packaging options vary significantly to meet footprint requirements, including LQFP, UFBGA, and WLCSP packages. Higher-end variants like the STM32L4R and L4S series offer higher clock speeds and specialized graphic acceleration, while specific part numbers indicate the inclusion of USB OTG or hardware encryption engines.
