Supply voltage and power – why 1.71 V matters
The STM32L431CCY6TR: The 1.71 V minimum supply (Vcc/Vdd) lets the MCU run directly from a lithium primary cell without a boost converter. The 3.6 V maximum covers USB VBUS only via external regulator.
STMicroelectronics STM32L4 series, STM32L431CCY6TR, 32-bit ARM Cortex-M4 MCU, 80MHz, 256KB Flash, 64KB SRAM, 1.71V-3.6V supply, 49-WLCSP, -40°C to 85°C.
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Specifications
| Parameter | Value |
|---|---|
| Series | STM32L4 |
| Mounting type | 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 | Tape & Reel (TR); Cut Tape (CT) |
| RAM size | 64K x 8 |
| Core size | 32-Bit Single-Core |
| Peripherals | Brown-out Detect/Reset, DMA, PWM, WDT |
| Connectivity | CANbus, I²C, IrDA, LINbus, QSPI, SAI, SPI, SWPMI, UART/USART |
| Number of i (O) | 39 |
| Core processor | ARM® Cortex®-M4 |
| Case | 49-UFBGA, WLCSP |
| Data converters | A/D 10x12b; D/A 2x12b |
| Program memory size | 256KB (256K x 8) |