DS14185 is a three drivers and five receivers a combination of devices that includes DC-DC converter, no ± 12V power supply. The internal noise filtering, so no external rate converter filter capacitor. DS14185 can be used for data terminal equipment (DTE) and data circuit-terminating equipment (DCE) interface, the drive input and output of the receiver circuit with TTL or CMOS compatible. In the data terminal equipment (DTE) to data circuit-terminating equipment (DCE) of the transmission interface 9-pin, 2 data lines and 6 control lines. Data lines TXD and RXD, control line for the RTS, DTR, DSRT, DCE, CTS, RI. DS14185 provides DTE interface, as shown in Figure specific connection.