MSP430x43x1, MSP430x43x, MSP430x44x1, MSP430x44x M.
Texas Instruments
MSP430F4371 - Mixed-Signal Microcontroller
MSP430x43x1, MSP430x43x, MSP430x44x1, MSP430x44x MIXED SIGNAL MICROCONTROLLER D Low Supply-Voltage Range, 1.8 V to 3.6 V D Ultralow-Power Consumption.