RS232 2 click

To implement the RS232 communication standard on the MCUs, it is necessary to convert the voltage levels to the levels acceptable for the modern MCUs. RS232 2 click performs full RS232 to UART signal conversion, allowing both 3.3V and 5V operation. Additionally, it features ±15 kV ESD protection for the RS-232 I/O pins. These attributes make this click a perfect solution for battery powered, hand-held and portable equipment, PDAs, palmtops, digital cameras, and other devices that still support the RS232 standard.

MAX3237E, a 3V to 5.5V multichannel RS232, 1 Mbit/s line driver/receiver from Texas Instruments.

Designed to use either a 5V or a 3.3V power supply (selected by jumper)