80 MHz Cortex-M4 with 256 KB Flash — mid-range STM32L4 for industrial and battery-edge designs
The 48-LQFP package gives access to 39 I/Os, and the peripheral set includes CANbus, multiple I²C and SPI interfaces, QSPI, SAI, and a 12-bit ADC with 10 channels plus two 12-bit DACs. Typical applications span industrial sensor nodes, portable instrumentation, motor-control interfaces, and IoT edge devices where the balance of compute throughput and active-mode power matters.
What the 80 MHz core and memory map mean for the BOM decision
The 64 KB SRAM (organized as 64K x 8) supports a few hundred bytes of frame buffer or a moderate data logger. If your firmware image and heap fit within these boundaries, this part avoids the cost uplift of the larger Flash siblings.
For a production BOM, this means no forced last-time-buy window to manage and no urgent need to qualify a second source — though the STM32L433 (with its extra 16 KB SRAM and AES accelerator) is a pin-compatible drop-in if the project later needs those blocks. The active status also keeps the part available through franchised distribution channels, which simplifies the audit trail for quality-sensitive builds.
Industrial temperature grade and 48-LQFP footprint
The 48-LQFP package with a 7x7 mm body and 0.5 mm pitch is a common footprint that reflows easily and is inspectable without X-ray.