The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available. These parts are especially useful in battery-powered systems,

一个电力载波模块程序，以输电线路为载波信号的传输媒介的电力系统通信，能实现抄表功能。-A power line carrier communications system module procedures to transmission lines as the transmission medium of the carrier signal power, to achieve meter reading function.