A serial transmitter that outputs one symbol every unit interval (UI) from a data source is presented. The serial transmitter includes a serial output port that outputs one symbol every unit interval (UI) from a data source. The serial transmitter also includes a plurality of driver segments that jointly drive the serial output port. Each driver segment is configured to use one of N phases of a sampling clock to serialize and transmit data from the data source. Different sets of the driver segments are configured to use different phases of the sampling clock for serializing and transmitting data, the sampling clock being a half-rate clock having a period of two UI.