M2M MCU With 32-Bit ARM Cortex M3 CPU And 256 Kbyte High-Density Flash Memory

15kV ESD protected 3 to 5.5V, 400kbps, RS-232 transceiver with auto power-down
![15 KV ESD PROTECTED 3 TO 5.5V, LOW POWER, UP TO 250KBPS RS-232 DRIVERS AND RECEIVERS, [0oC, 70oC] TEMPERATURE RANGE](https://static.datasheets.com/image/24790737-stmicroelectronics-st3222ecdr-image.jpg)
15 KV ESD PROTECTED 3 TO 5.5V, LOW POWER, UP TO 250KBPS RS-232 DRIVERS AND RECEIVERS, [0oC, 70oC] TEMPERATURE RANGE