A high speed serial interface transmitter chip is described. The equalizer adopts the multi-tap feed forward equalizer structure and the tuning coefficient of each tap can be adjusted, which increases the range of the balanced tuning and improves the balance precision. H-tree driver is utilized to transmit the serial signal, which improves the current utilization coefficient and reduces the power consumption. The transmitter is designed in TSMC 55 nm CMOS technology with 1 V power supply, and the output data rate range is from 550 Mb/s to 6.25 Gb/s. The overall power consumption is approximately 20 mW at the highest rate of 6.25 Gb/s. The results indicate that the transmitter possesses high balance precision and low power consumption.