STM32L431 in STM32 Family
The STM32L431 sub-family from STMicroelectronics is a series of ultra-low-power microcontrollers based on the high-performance ARM Cortex-M4 32-bit RISC core. Operating at frequencies up to 80 MHz, these devices balance computational power with extreme energy efficiency. They are designed for applications requiring high-speed data processing and floating-point operations within a strict power budget, utilizing ST's proprietary ART Accelerator and FlexPowerControl technology to optimize power consumption across multiple low-power modes.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | Connectivity | I/O Pins | Package | ADC/DAC | Flash | Stock |
|---|---|---|---|---|---|---|
| STM32L431RCY6TR (STMicroelectronics) Tape & Reel | CANbus, I2C, IrDA,.. | 52 | UFBGA-64 | A/D 16x12b; D/A 2x.. | 256KB | 7,719 |
| STM32L431CCU6 (STMicroelectronics) | CANbus, I2C, IrDA,.. | 39 | UFQFN-48 | A/D 10x12b; D/A 2x.. | 256KB | 4,536 |
| STM32L431CCT6TR (STMicroelectronics) Tape & Reel | CANbus, I2C, IrDA,.. | 39 | LQFP-48 | A/D 10x12b; D/A 2x.. | 256KB | 2,090 |
| STM32L431CBT6 (STMicroelectronics) | CANbus, I2C, IrDA,.. | 39 | LQFP-48 | A/D 10x12b; D/A 2x.. | 128KB | 7,981 |
| STM32L431CCU6TR (STMicroelectronics) Tape & Reel | CANbus, I2C, IrDA,.. | 39 | UFQFN-48 | A/D 10x12b; D/A 2x.. | 256KB | 4,988 |
| STM32L431CCY6TR (STMicroelectronics) Tape & Reel | CANbus, I2C, IrDA,.. | 39 | UFBGA-49 | A/D 10x12b; D/A 2x.. | 256KB | 4,274 |
| STM32L431KCU6 (STMicroelectronics) | CANbus, I2C, IrDA,.. | 26 | UFQFN-32 | A/D 10x12b; D/A 2x.. | 256KB | 2,192 |
| STM32L431CCT6 (STMicroelectronics) | CANbus, I2C, IrDA,.. | 39 | LQFP-48 | A/D 10x12b; D/A 2x.. | 256KB | 2,669 |
| STM32L431CBU6 (STMicroelectronics) | CANbus, I2C, IrDA,.. | 39 | UFQFN-48 | A/D 10x12b; D/A 2x.. | 128KB | 4,034 |
| STM32L431VCT6 (STMicroelectronics) | CANbus, I2C, IrDA,.. | 83 | LQFP-100 | A/D 16x12b; D/A 2x.. | 256KB | 10 |
Variants within the STM32L431 sub-family primarily differ based on Flash memory density, ranging from 128KB to 256KB, and package types. Package options include LQFP48, UFQFPN32, UFQFPN48, and WLCSP49, allowing engineers to trade off GPIO count and PCB footprint. Some variants offer extended temperature ranges for industrial environments, though the core peripheral set remains consistent across the series.
