Two_RS_232_serial_ports_with_one_chip

Published:2009/7/24 11:27:00 Author:Jessie | From:SeekIC

In this circuit, a MAX249 includes a full complement of drivers and receivers for two complete DTE (Data Terminal Equipment) serial ports. The circuit also saves power with separate shutdown inputs for the inputs and outputs of both DTE ports. When both ports are off, supply current is only 25μA. The dual serial ports are powered from a single +5-V supply. The guaranteed data rate is 64 kb/s, which ensures compatibility with EIA-232D/232E, V.28/V.24, and EIA-562. Maxim, 1992, Appications and Product Highlights, p. 2-6.



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