STMicroelectronics STM32L4 series, ARM Cortex-M4, 32-bit, 80 MHz, 512KB Flash, 160K x 8 RAM, 52 I/O, 1.71V-3.6V, -40°C to 85°C, 64-UFBGA (5x5).
| Parameter | Value |
|---|---|
| Series | STM32L4 |
| 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 | 80MHz |
| Package | Tray |
| RAM size | 160K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, PWM, WDT |
| Connectivity | CANbus, I²C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, UART/USART |
| Number of i (O) | 52 |
| Core processor | ARM® Cortex®-M4 |
| Case | 64-UFBGA |
| Data converters | A/D 16x12b; D/A 1x12b |
| Program memory size | 512KB (512K x 8) |
The STM32L451REI6: 16-channel 12-bit ADC and single 12-bit DAC are on-chip.
Housed in a 64-UFBGA (5x5 mm) package.
It is ROHS3 compliant. If you need a second-source option for dual-sourcing, the STM32L471RET6 (same Cortex-M4 core, 80 MHz, 512 KB Flash, 64-UFBGA) is a close functional match with an extra EBI/EMI interface and dual DACs — worth qualifying if board space and pinout allow.
The core runs at 80 MHz. At that speed, the Flash requires one wait state for zero-wait execution; the prefetch buffer and ART Accelerator help keep throughput high for linear code.
The STM32L452REI6 adds a second 12-bit DAC and a USB OTG interface, while the STM32L451REI6 has a single DAC and no USB. Both share the same 80 MHz Cortex-M4 core, 512 KB Flash, 160 KB SRAM, and 64-UFBGA package. Choose the L452 if you need USB connectivity or dual analog outputs.
Yes, the STM32L451REI6 supports SWD (Serial Wire Debug) via the standard ST-Link/V2 or ST-Link/V3. Connect SWDIO, SWCLK, and GND; the target supply can come from the debug probe or the board's own 3.3 V rail.