80 MHz Cortex-M4 with 1 MB Flash — BOM fit for battery-conscious designs
The STM32L4A6RGT7 is a 32-bit ARM Cortex-M4 MCU from STMicroelectronics' STM32L4 ultra-low-power series, clocked at 80 MHz. It carries 1 MB of Flash and 320 KB of RAM, giving it enough code space for complex control firmware and moderate data buffering — think sensor fusion, metering, or IoT edge processing where every microamp counts. The 52 I/Os, CANbus, USB OTG, and multiple serial interfaces make it a natural fit for industrial sensor hubs, portable medical devices, and building-automation gateways that need to talk to legacy fieldbuses and modern USB hosts.
1 MB Flash and 320 KB RAM — sizing the firmware budget
With 1 MB of Flash, this part holds a full RTOS image plus application code. The 320 KB RAM supports moderate data arrays and stack depth. Compared to other STM32L4 variants, this part doubles both memory resources for roughly the same pinout and power profile.
Package and integration note
The 64-LQFP (10x10 mm) package with 52 I/Os is a standard surface-mount footprint, compatible with reflow soldering and common PCB land patterns. The pinout is shared across the STM32L4A6 value-line density options, so a board designed for this part can also accept pin-compatible siblings with different Flash/RAM sizes — useful for scaling production across multiple BOM variants without a PCB respin.