Maxim max202 linear dual rs232 transceivers maxim max202cwe the max202cwe is a transceiver that is designed as a rs232 v 28 and eia tia 232e communications interface especially where 12v supplies are not available the device consists of charge pump voltage converters drivers transmitters and receivers this version is recommended for low cost critical applications and is suitable for applications such as portable computers low power modems interface translation battery powered rs23