A high-speed parallel interface for communicating data between integrated circuits is disclosed. In one embodiment, the transmitter controller accepts 40-bit wide data every 167 Mhz clock cycle, the receiver controller delivers 40-bit wide data every 167 Mhz clock cycle, and the interconnect bus transmits 10-bit wide data at every transition of a 333 Mhz clock cycle. In another embodiment, the transmitter controller accepts 32-bit wide data every 167 Mhz clock cycle, the receiver controller delivers 32-bit wide data every 167 Mhz clock cycle, and the interconnect bus of this embodiment transmits 8-bit wide data at every transition of a 333 Mhz clock cycle. Output pins of the transmitter interface can be connected to any input pins of the receiver interface. Furthermore, the high-speed parallel interface does not require a fixed phase relationship between the receiver's internal clock(s) and the bus clock signal.